Merge commit 'mingw/master' into devel

Conflicts:

	Makefile
	git-compat-util.h
	help.c
	t/t5505-remote.sh

.gitignore

@@ -1,3 +1,4 @@
+GIT-BUILD-OPTIONS
 GIT-CFLAGS
 GIT-GUI-VARS
 GIT-VERSION-FILE

Documentation/CodingGuidelines

@@ -53,6 +53,18 @@ For shell scripts specifically (not exhaustive):
  - We do not write the noiseword "function" in front of shell
    functions.
 
+ - As to use of grep, stick to a subset of BRE (namely, no \{m,n\},
+   [::], [==], nor [..]) for portability.
+
+   - We do not use \{m,n\};
+
+   - We do not use -E;
+
+   - We do not use ? nor + (which are \{0,1\} and \{1,\}
+     respectively in BRE) but that goes without saying as these
+     are ERE elements not BRE (note that \? and \+ are not even part
+     of BRE -- making them accessible from BRE is a GNU extension).
+
 For C programs:
 
  - We use tabs to indent, and interpret tabs as taking up to

Documentation/RelNotes-1.5.4.3.txt

@@ -0,0 +1,27 @@
+GIT v1.5.4.3 Release Notes
+==========================
+
+Fixes since v1.5.4.2
+--------------------
+
+ * RPM spec used to pull in everything with 'git'.  This has been
+   changed so that 'git' package contains just the core parts,
+   and we now supply 'git-all' metapackage to slurp in everything.
+   This should match end user's expectation better.
+
+ * When some refs failed to update, git-push reported "failure"
+   which was unclear if some other refs were updated or all of
+   them failed atomically (the answer is the former).  Reworded
+   the message to clarify this.
+
+ * "git clone" from a repository whose HEAD was misconfigured
+   did not set up the remote properly.  Now it tries to do
+   better.
+
+ * Updated git-push documentation to clarify what "matching"
+   means, in order to reduce user confusion.
+
+ * Updated git-add documentation to clarify "add -u" operates in
+   the current subdirectory you are in, just like other commands.
+
+ * git-gui updates to work on OSX and Windows better.

Documentation/RelNotes-1.5.4.4.txt

@@ -0,0 +1,66 @@
+GIT v1.5.4.4 Release Notes
+==========================
+
+Fixes since v1.5.4.3
+--------------------
+
+ * Building and installing with an overtight umask such as 077 made
+   installed templates unreadable by others, while the rest of the install
+   are done in a way that is friendly to umask 022.
+
+ * "git cvsexportcommit -w $cvsdir" misbehaved when GIT_DIR is set to a
+   relative directory.
+
+ * "git http-push" had an invalid memory access that could lead it to
+   segfault.
+
+ * When "git rebase -i" gave control back to the user for a commit that is
+   marked to be edited, it just said "modify it with commit --amend",
+   without saying what to do to continue after modifying it.  Give an
+   explicit instruction to run "rebase --continue" to be more helpful.
+
+ * "git send-email" in 1.5.4.3 issued a bogus empty In-Reply-To: header.
+
+ * "git bisect" showed mysterious "won't bisect on seeked tree" error message.
+   This was leftover from Cogito days to prevent "bisect" starting from a
+   cg-seeked state.  We still keep the Cogito safety, but running "git bisect
+   start" when another bisect was in effect will clean up and start over.
+
+ * "git push" with an explicit PATH to receive-pack did not quite work if
+   receive-pack was not on usual PATH.  We earlier fixed the same issue
+   with "git fetch" and upload-pack, but somehow forgot to do so in the
+   other direction.
+
+ * git-gui's info dialog was not displayed correctly when the user tries
+   to commit nothing (i.e. without staging anything).
+
+ * "git revert" did not properly fail when attempting to run with a
+   dirty index.
+
+ * "git merge --no-commit --no-ff <other>" incorrectly made commits.
+
+ * "git merge --squash --no-ff <other>", which is a nonsense combination
+   of options, was not rejected.
+
+ * "git ls-remote" and "git remote show" against an empty repository
+   failed, instead of just giving an empty result (regression).
+
+ * "git fast-import" did not handle a renamed path whose name needs to be
+   quoted, due to a bug in unquote_c_style() function.
+
+ * "git cvsexportcommit" was confused when multiple files with the same
+   basename needed to be pushed out in the same commit.
+
+ * "git daemon" did not send early errors to syslog.
+
+ * "git log --merge" did not work well with --left-right option.
+
+ * "git svn" promprted for client cert password every time it accessed the
+   server.
+
+ * The reset command in "git fast-import" data stream was documented to
+   end with an optional LF, but it actually required one.
+
+ * "git svn dcommit/rebase" did not honor --rewrite-root option.
+
+Also included are a handful documentation updates.

Documentation/RelNotes-1.5.4.5.txt

@@ -0,0 +1,53 @@
+GIT v1.5.4.5 Release Notes
+==========================
+
+Fixes since v1.5.4.4
+--------------------
+
+ * You couldn't specify a custom editor whose path contains a whitespace
+   via GIT_EDITOR (and core.editor).
+
+ * The subdirectory filter to "git filter-branch" mishandled a history
+   where the subdirectory becomes empty and then later becomes non-empty.
+
+ * "git shortlog" gave an empty line if the original commit message was
+   malformed (e.g. a botched import from foreign SCM).  Now it finds the
+   first non-empty line and uses it for better information.
+
+ * When the user fails to give a revision parameter to "git svn", an error
+   from the Perl interpreter was issued because the script lacked proper
+   error checking.
+
+ * After "git rebase" stopped due to conflicts, if the user played with
+   "git reset" and friends, "git rebase --abort" failed to go back to the
+   correct commit.
+
+ * Additional work trees prepared with git-new-workdir (in contrib/) did
+   not share git-svn metadata directory .git/svn with the original.
+
+ * "git-merge-recursive" did not mark addition of the same path with
+   different filemodes correctly as a conflict.
+
+ * "gitweb" gave malformed URL when pathinfo stype paths are in use.
+
+ * "-n" stands for "--no-tags" again for "git fetch".
+
+ * "git format-patch" did not detect the need to add 8-bit MIME header
+   when the user used format.header configuration.
+
+ * "rev~" revision specifier used to mean "rev", which was inconsistent
+   with how "rev^" worked.  Now "rev~" is the same as "rev~1" (hence it
+   also is the same as "rev^1"), and "rev~0" is the same as "rev^0"
+   (i.e. it has to be a commit).
+
+ * "git quiltimport" did not grok empty lines, lines in "file -pNNN"
+   format to specify the prefix levels and lines with trailing comments.
+
+ * "git rebase -m" triggered pre-commit verification, which made
+   "rebase --continue" impossible.
+
+--
+exec >/var/tmp/1
+echo O=$(git describe maint)
+O=v1.5.4.4-25-ga6f7728
+git shortlog --no-merges $O..maint

Documentation/RelNotes-1.5.5.txt

@@ -4,6 +4,19 @@ GIT v1.5.5 Release Notes
 Updates since v1.5.4
 --------------------
 
+(subsystems)
+
+ * Comes with git-gui 0.9.3.
+
+(portability)
+
+ * We shouldn't ask for BSD group ownership semantics by setting g+s bit
+   on directories on older BSD systems that refuses chmod() by non root
+   users.  BSD semantics is the default there anyway.
+
+ * Bunch of portability improvement patches coming from an effort to port
+   to Solaris has been applied.
+
 (performance)
 
  * On platforms with suboptimal qsort(3) implementation, there
@@ -23,33 +36,132 @@ Updates since v1.5.4
 
 (usability, bells and whistles)
 
+ * Bash completion script (in contrib) are aware of more commands and
+   options.
+
  * You can be warned when core.autocrlf conversion is applied in
    such a way that results in an irreversible conversion.
 
+ * A catch-all "color.ui" configuration variable can be used to
+   enable coloring of all color-capable commands, instead of
+   individual ones such as "color.status" and "color.branch".
+
+ * The commands refused to take absolute pathnames where they
+   require pathnames relative to the work tree or the current
+   subdirectory.  They now can take absolute pathnames in such a
+   case as long as the pathnames do not refer outside of the
+   work tree.  E.g. "git add $(pwd)/foo" now works.
+
+ * Error messages used to be sent to stderr, only to get hidden,
+   when $PAGER was in use.  They now are sent to stdout along
+   with the command output to be shown in the $PAGER.
+
  * A pattern "foo/" in .gitignore file now matches a directory
    "foo".  Pattern "foo" also matches as before.
 
+ * bash completion's prompt helper function can talk about
+   operation in-progress (e.g. merge, rebase, etc.).
+
+ * Configuration variables "url.<usethis>.insteadof = <otherurl>" can be
+   used to tell "git-fetch" and "git-push" to use different URL than what
+   is given from the command line.
+
+ * "git add -i" behaves better even before you make an initial commit.
+
+ * "git am" refused to run from a subdirectory without a good reason.
+
+ * After "git apply --whitespace=fix" fixes whitespace errors in a patch,
+   a line before the fix can appear as a context or preimage line in a
+   later patch, causing the patch not to apply.  The command now knows to
+   see through whitespace fixes done to context lines to successfully
+   apply such a patch series.
+
+ * "git branch" (and "git checkout -b") to branch from a local branch can
+   optionally set "branch.<name>.merge" to mark the new branch to build on
+   the other local branch, when "branch.autosetupmerge" is set to
+   "always".  By default, this does not happen when branching from a local
+   branch.
+
+ * "git checkout" to switch to a branch that has "branch.<name>.merge" set
+   (i.e. marked to build on another branch) reports how much the branch
+   and the other branch diverged.
+
+ * When "git checkout" has to update a lot of paths, it used to be silent
+   for 4 seconds before it showed any progress report.  It is now a bit
+   more impatient and starts showing progress report early.
+
+ * "git commit" learned a new hook "prepare-commit-msg" that can
+   inspect what is going to be committed and prepare the commit
+   log message template to be edited.
+
+ * "git cvsimport" can now take more than one -M options.
+
  * "git describe" learned to limit the tags to be used for
    naming with --match option.
 
  * "git describe --contains" now barfs when the named commit
    cannot be described.
 
- * bash completion's prompt helper function can talk about
-   operation in-progress (e.g. merge, rebase, etc.).
+ * "git describe --exact-match" describes only commits that are tagged.
 
- * "git commit" learned a new hook "prepare-commit-msg" that can
-   inspect what is going to be committed and prepare the commit
-   log message template to be edited.
+ * "git describe --long" describes a tagged commit as $tag-0-$sha1,
+   instead of just showing the exact tagname.
+
+ * "git describe" warns when using a tag whose name and path contradict
+   with each other.
+
+ * "git diff" learned "--relative" option to limit and output paths
+   relative to the current directory when working in a subdirectory.
+
+ * "git diff" learned "--dirstat" option to show birds-eye-summary of
+   changes more concisely than "--diffstat".
+
+ * "git format-patch" learned --cover-letter option to generate a cover
+   letter template.
+
+ * "git gc" learned --quiet option.
+
+ * "git gc" now automatically prunes unreachable objects that are two
+   weeks old or older.
+
+ * "git grep" now knows "--name-only" is a synonym for the "-l" option.
+
+ * "git help <alias>" now reports "'git <alias>' is alias to <what>",
+   instead of saying "No manual entry for git-<alias>".
+
+ * "git help" can use different backends to show manual pages and this can
+   be configured using "man.viewer" configuration.
+
+ * "gitk" does not restore window position from $HOME/.gitk anymore (it
+   still restores the size).
+
+ * "git log --grep=<what>" learned "--fixed-strings" option to look for
+   <what> without treating it as a regular expression.
 
  * "git gui" learned an auto-spell checking.
 
+ * "git push <somewhere> HEAD" and "git push <somewhere> +HEAD" works as
+   expected; they push the current branch (and only the current branch).
+   In addition, HEAD can be written as the value of "remote.<there>.push"
+   configuration variable.
+
+ * When the configuration variable "pack.threads" is set to 0, "git
+   repack" auto detects the number of CPUs and uses that many threads.
+
  * "git send-email" learned to prompt for passwords
    interactively.
 
  * "git send-email" learned an easier way to suppress CC
    recipients.
 
+ * "git stash" learned "pop" command, that applies the latest stash and
+   removes it from the stash, and "drop" command to discard the named
+   stash entry.
+
+ * "git submodule" learned a new subcommand "summary" to show the
+   symmetric difference between the HEAD version and the work tree version
+   of the submodule commits.
+
  * Various "git cvsimport", "git cvsexportcommit", "git svn" and
    "git p4" improvements.
 
@@ -61,6 +173,19 @@ Updates since v1.5.4
  * It is now easier to write test scripts that records known
    breakages.
 
+ * "git checkout" is rewritten in C.
+
+ * "git remote" is rewritten in C.
+
+ * Two conflict hunks that are separated by a very short span of common
+   lines are now coalesced into one larger hunk, to make the result easier
+   to read.
+
+ * Run-command API's use of file descriptors is documented clearer and
+   is more consistent now.
+
+ * diff output can be sent to FILE * that is different from stdout.  This
+   will help reimplementing more things in C.
 
 Fixes since v1.5.4
 ------------------
@@ -68,11 +193,14 @@ Fixes since v1.5.4
 All of the fixes in v1.5.4 maintenance series are included in
 this release, unless otherwise noted.
 
+ * "git-http-push" did not allow deletion of remote ref with the usual
+   "push <remote> :<branch>" syntax.
+
+ * "git-rebase --abort" did not go back to the right location if
+   "git-reset" was run during the "git-rebase" session.
 
 ---
 exec >/var/tmp/1
-O=v1.5.4
-O=v1.5.4.2-122-g7cb97da
+O=v1.5.4.4-620-gc817faa
 echo O=`git describe refs/heads/master`
 git shortlog --no-merges $O..refs/heads/master ^refs/heads/maint
-

Documentation/config.txt

@@ -353,6 +353,10 @@ core.whitespace::
   error (enabled by default).
 * `indent-with-non-tab` treats a line that is indented with 8 or more
   space characters as an error (not enabled by default).
+* `cr-at-eol` treats a carriage-return at the end of line as
+  part of the line terminator, i.e. with it, `trailing-space`
+  does not trigger if the character before such a carriage-return
+  is not a whitespace (not enabled by default).
 
 alias.*::
 	Command aliases for the linkgit:git[1] command wrapper - e.g.
@@ -375,10 +379,14 @@ apply.whitespace::
 
 branch.autosetupmerge::
 	Tells `git-branch` and `git-checkout` to setup new branches
-	so that linkgit:git-pull[1] will appropriately merge from that
-	remote branch.  Note that even if this option is not set,
+	so that linkgit:git-pull[1] will appropriately merge from the
+	starting point branch. Note that even if this option is not set,
 	this behavior can be chosen per-branch using the `--track`
-	and `--no-track` options.  This option defaults to true.
+	and `--no-track` options. The valid settings are: `false` -- no
+	automatic setup is done; `true` -- automatic setup is done when the
+	starting point is a remote branch; `always` -- automatic setup is
+	done when the starting point is either a local branch or remote
+	branch. This option defaults to true.
 
 branch.<name>.remote::
 	When in branch <name>, it tells `git fetch` which remote to fetch.
@@ -412,6 +420,11 @@ branch.<name>.rebase::
 	it unless you understand the implications (see linkgit:git-rebase[1]
 	for details).
 
+browser.<tool>.cmd::
+	Specify the command to invoke the specified browser. The
+	specified command is evaluated in shell with the URLs passed
+	as arguments. (See linkgit:git-web--browse[1].)
+
 browser.<tool>.path::
 	Override the path for the given tool that may be used to
 	browse HTML help (see '-w' option in linkgit:git-help[1]) or a
@@ -548,6 +561,11 @@ format.suffix::
 	`.patch`. Use this variable to change that suffix (make sure to
 	include the dot if you want it).
 
+format.pretty::
+	The default pretty format for log/show/whatchanged command,
+	See linkgit:git-log[1], linkgit:git-show[1],
+	linkgit:git-whatchanged[1].
+
 gc.aggressiveWindow::
 	The window size parameter used in the delta compression
 	algorithm used by 'git gc --aggressive'.  This defaults
@@ -577,6 +595,10 @@ gc.packrefs::
 	at some stage, and setting this to `false` will continue to
 	prevent `git pack-refs` from being run from `git gc`.
 
+gc.pruneexpire::
+	When `git gc` is run, it will call `prune --expire 2.weeks.ago`.
+	Override the grace period with this config variable.
+
 gc.reflogexpire::
 	`git reflog expire` removes reflog entries older than
 	this time; defaults to 90 days.
@@ -735,14 +757,20 @@ log.showroot::
 	Tools like linkgit:git-log[1] or linkgit:git-whatchanged[1], which
 	normally hide the root commit will now show it. True by default.
 
+man.viewer::
+	Specify the programs that may be used to display help in the
+	'man' format. See linkgit:git-help[1].
+
 merge.summary::
 	Whether to include summaries of merged commits in newly created
 	merge commit messages. False by default.
 
 merge.tool::
 	Controls which merge resolution program is used by
-	linkgit:git-mergetool[1].  Valid values are: "kdiff3", "tkdiff",
-	"meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and "opendiff".
+	linkgit:git-mergetool[1].  Valid built-in values are: "kdiff3",
+	"tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and
+	"opendiff".  Any other value is treated is custom merge tool
+	and there must be a corresponing mergetool.<tool>.cmd option.
 
 merge.verbosity::
 	Controls the amount of output shown by the recursive merge
@@ -769,6 +797,31 @@ mergetool.<tool>.path::
 	Override the path for the given tool.  This is useful in case
 	your tool is not in the PATH.
 
+mergetool.<tool>.cmd::
+	Specify the command to invoke the specified merge tool.  The
+	specified command is evaluated in shell with the following
+	variables available: 'BASE' is the name of a temporary file
+	containing the common base of the files to be merged, if available;
+	'LOCAL' is the name of a temporary file containing the contents of
+	the file on the current branch; 'REMOTE' is the name of a temporary
+	file containing the contents of the file from the branch being
+	merged; 'MERGED' contains the name of the file to which the merge
+	tool should write the results of a successful merge.
+
+mergetool.<tool>.trustExitCode::
+	For a custom merge command, specify whether the exit code of
+	the merge command can be used to determine whether the merge was
+	successful.  If this is not set to true then the merge target file
+	timestamp is checked and the merge assumed to have been successful
+	if the file has been updated, otherwise the user is prompted to
+	indicate the success of the merge.
+
+mergetool.keepBackup::
+	After performing a merge, the original file with conflict markers
+	can be saved as a file with a `.orig` extension.  If this variable
+	is set to `false` then this file is not preserved.  Defaults to
+	`true` (i.e. keep the backup files).
+
 pack.window::
 	The size of the window used by linkgit:git-pack-objects[1] when no
 	window size is given on the command line. Defaults to 10.
@@ -808,6 +861,8 @@ pack.threads::
 	warning. This is meant to reduce packing time on multiprocessor
 	machines. The required amount of memory for the delta search window
 	is however multiplied by the number of threads.
+	Specifying 0 will cause git to auto-detect the number of CPU's
+	and set the number of threads accordingly.
 
 pack.indexVersion::
 	Specify the default pack index version.  Valid values are 1 for
@@ -818,7 +873,7 @@ pack.indexVersion::
 	whenever the corresponding pack is larger than 2 GB.  Otherwise
 	the default is 1.
 
-pack.packSizeLimit:
+pack.packSizeLimit::
 	The default maximum size of a pack.  This setting only affects
 	packing to a file, i.e. the git:// protocol is unaffected.  It
 	can be overridden by the `\--max-pack-size` option of
@@ -854,15 +909,15 @@ remote.<name>.skipDefaultUpdate::
 
 remote.<name>.receivepack::
 	The default program to execute on the remote side when pushing.  See
-	option \--exec of linkgit:git-push[1].
+	option \--receive-pack of linkgit:git-push[1].
 
 remote.<name>.uploadpack::
 	The default program to execute on the remote side when fetching.  See
-	option \--exec of linkgit:git-fetch-pack[1].
+	option \--upload-pack of linkgit:git-fetch-pack[1].
 
 remote.<name>.tagopt::
-	Setting this value to --no-tags disables automatic tag following when fetching
-	from remote <name>
+	Setting this value to \--no-tags disables automatic tag following when
+	fetching from remote <name>
 
 remotes.<group>::
 	The list of remotes which are fetched by "git remote update
@@ -893,6 +948,17 @@ tar.umask::
 	archiving user's umask will be used instead.  See umask(2) and
 	linkgit:git-archive[1].
 
+url.<base>.insteadOf::
+	Any URL that starts with this value will be rewritten to
+	start, instead, with <base>. In cases where some site serves a
+	large number of repositories, and serves them with multiple
+	access methods, and some users need to use different access
+	methods, this feature allows people to specify any of the
+	equivalent URLs and have git automatically rewrite the URL to
+	the best alternative for the particular user, even for a
+	never-before-seen repository on the site.  When more than one
+	insteadOf strings match a given URL, the longest match is used.
+
 user.email::
 	Your email address to be recorded in any newly created commits.
 	Can be overridden by the 'GIT_AUTHOR_EMAIL', 'GIT_COMMITTER_EMAIL', and

Documentation/diff-options.txt

@@ -170,6 +170,14 @@ endif::git-format-patch[]
 	Swap two inputs; that is, show differences from index or
 	on-disk file to tree contents.
 
+--relative[=<path>]::
+	When run from a subdirectory of the project, it can be
+	told to exclude changes outside the directory and show
+	pathnames relative to it with this option.  When you are
+	not in a subdirectory (e.g. in a bare repository), you
+	can name which subdirectory to make the output relative
+	to by giving a <path> as an argument.
+
 --text::
 	Treat all files as text.
 

Documentation/git-add.txt

@@ -207,16 +207,14 @@ patch::
   and the working tree file and asks you if you want to stage
   the change of each hunk.  You can say:
 
-       y - add the change from that hunk to index
-       n - do not add the change from that hunk to index
-       a - add the change from that hunk and all the rest to index
-       d - do not the change from that hunk nor any of the rest to index
-       j - do not decide on this hunk now, and view the next
-           undecided hunk
-       J - do not decide on this hunk now, and view the next hunk
-       k - do not decide on this hunk now, and view the previous
-           undecided hunk
-       K - do not decide on this hunk now, and view the previous hunk
+       y - stage this hunk
+       n - do not stage this hunk
+       a - stage this and all the remaining hunks in the file
+       d - do not stage this hunk nor any of the remaining hunks in the file
+       j - leave this hunk undecided, see next undecided hunk
+       J - leave this hunk undecided, see next hunk
+       k - leave this hunk undecided, see previous undecided hunk
+       K - leave this hunk undecided, see previous hunk
        s - split the current hunk into smaller hunks
        ? - print help
 +

Documentation/git-am.txt

@@ -9,7 +9,7 @@ git-am - Apply a series of patches from a mailbox
 SYNOPSIS
 --------
 [verse]
-'git-am' [--signoff] [--dotest=<dir>] [--keep] [--utf8 | --no-utf8]
+'git-am' [--signoff] [--keep] [--utf8 | --no-utf8]
          [--3way] [--interactive] [--binary]
          [--whitespace=<option>] [-C<n>] [-p<n>]
          <mbox>|<Maildir>...
@@ -32,10 +32,6 @@ OPTIONS
 	Add `Signed-off-by:` line to the commit message, using
 	the committer identity of yourself.
 
--d=<dir>, --dotest=<dir>::
-	Instead of `.dotest` directory, use <dir> as a working
-	area to store extracted patches.
-
 -k, --keep::
 	Pass `-k` flag to `git-mailinfo` (see linkgit:git-mailinfo[1]).
 
@@ -138,7 +134,7 @@ aborts in the middle,.  You can recover from this in one of two ways:
 
 The command refuses to process new mailboxes while `.dotest`
 directory exists, so if you decide to start over from scratch,
-run `rm -f .dotest` before running the command with mailbox
+run `rm -f -r .dotest` before running the command with mailbox
 names.
 
 

Documentation/git-branch.txt

@@ -35,11 +35,10 @@ working tree to it; use "git checkout <newbranch>" to switch to the
 new branch.
 
 When a local branch is started off a remote branch, git sets up the
-branch so that linkgit:git-pull[1] will appropriately merge from that
-remote branch.  If this behavior is not desired, it is possible to
-disable it using the global `branch.autosetupmerge` configuration
-flag.  That setting can be overridden by using the `--track`
-and `--no-track` options.
+branch so that linkgit:git-pull[1] will appropriately merge from
+the remote branch. This behavior may be changed via the global
+`branch.autosetupmerge` configuration flag. That setting can be
+overridden by using the `--track` and `--no-track` options.
 
 With a '-m' or '-M' option, <oldbranch> will be renamed to <newbranch>.
 If <oldbranch> had a corresponding reflog, it is renamed to match
@@ -105,20 +104,19 @@ OPTIONS
 	Display the full sha1s in output listing rather than abbreviating them.
 
 --track::
-	Set up configuration so that git-pull will automatically
-	retrieve data from the remote branch.  Use this if you always
-	pull from the same remote branch into the new branch, or if you
-	don't want to use "git pull <repository> <refspec>" explicitly.
-	This behavior is the default.  Set the
-	branch.autosetupmerge configuration variable to false if you
-	want git-checkout and git-branch to always behave as if
-	'--no-track' were given.
+	When creating a new branch, set up configuration so that git-pull
+	will automatically retrieve data from the start point, which must be
+	a branch. Use this if you always pull from the same upstream branch
+	into the new branch, and if you don't want to use "git pull
+	<repository> <refspec>" explicitly. This behavior is the default
+	when the start point is a remote branch. Set the
+	branch.autosetupmerge configuration variable to `false` if you want
+	git-checkout and git-branch to always behave as if '--no-track' were
+	given. Set it to `always` if you want this behavior when the
+	start-point is either a local or remote branch.
 
 --no-track::
-	When a branch is created off a remote branch,
-	set up configuration so that git-pull will not retrieve data
-	from the remote branch, ignoring the branch.autosetupmerge
-	configuration variable.
+	Ignore the branch.autosetupmerge configuration variable.
 
 <branchname>::
 	The name of the branch to create or delete.

Documentation/git-bundle.txt

@@ -99,36 +99,62 @@ Assume two repositories exist as R1 on machine A, and R2 on machine B.
 For whatever reason, direct connection between A and B is not allowed,
 but we can move data from A to B via some mechanism (CD, email, etc).
 We want to update R2 with developments made on branch master in R1.
+
+To create the bundle you have to specify the basis. You have some options:
+
+- Without basis.
++
+This is useful when sending the whole history.
+
+------------
+$ git bundle create mybundle master
+------------
+
+- Using temporally tags.
++
 We set a tag in R1 (lastR2bundle) after the previous such transport,
 and move it afterwards to help build the bundle.
 
-in R1 on A:
-
 ------------
 $ git-bundle create mybundle master ^lastR2bundle
 $ git tag -f lastR2bundle master
 ------------
 
-(move mybundle from A to B by some mechanism)
+- Using a tag present in both repositories
 
-in R2 on B:
+------------
+$ git bundle create mybundle master ^v1.0.0
+------------
+
+- A basis based on time.
+
+------------
+$ git bundle create mybundle master --since=10.days.ago
+------------
+
+- With a limit on the number of commits
+
+------------
+$ git bundle create mybundle master -n 10
+------------
+
+Then you move mybundle from A to B, and in R2 on B:
 
 ------------
 $ git-bundle verify mybundle
-$ git-fetch mybundle  refspec
+$ git-fetch mybundle master:localRef
 ------------
 
-where refspec is refInBundle:localRef
-
-
-Also, with something like this in your config:
+With something like this in the config in R2:
 
+------------------------
 [remote "bundle"]
     url = /home/me/tmp/file.bdl
     fetch = refs/heads/*:refs/remotes/origin/*
+------------------------
 
 You can first sneakernet the bundle file to ~/tmp/file.bdl and
-then these commands:
+then these commands on machine B:
 
 ------------
 $ git ls-remote bundle

Documentation/git-checkout.txt

@@ -48,21 +48,19 @@ OPTIONS
 	may restrict the characters allowed in a branch name.
 
 --track::
-	When -b is given and a branch is created off a remote branch,
-	set up configuration so that git-pull will automatically
-	retrieve data from the remote branch.  Use this if you always
-	pull from the same remote branch into the new branch, or if you
-	don't want to use "git pull <repository> <refspec>" explicitly.
-	This behavior is the default.  Set the
-	branch.autosetupmerge configuration variable to false if you
-	want git-checkout and git-branch to always behave as if
-	'--no-track' were given.
+	When creating a new branch, set up configuration so that git-pull
+	will automatically retrieve data from the start point, which must be
+	a branch. Use this if you always pull from the same upstream branch
+	into the new branch, and if you don't want to use "git pull
+	<repository> <refspec>" explicitly. This behavior is the default
+	when the start point is a remote branch. Set the
+	branch.autosetupmerge configuration variable to `false` if you want
+	git-checkout and git-branch to always behave as if '--no-track' were
+	given. Set it to `always` if you want this behavior when the
+	start-point is either a local or remote branch.
 
 --no-track::
-	When -b is given and a branch is created off a remote branch,
-	set up configuration so that git-pull will not retrieve data
-	from the remote branch, ignoring the branch.autosetupmerge
-	configuration variable.
+	Ignore the branch.autosetupmerge configuration variable.
 
 -l::
 	Create the new branch's reflog.  This activates recording of

Documentation/git-cherry-pick.txt

@@ -45,7 +45,7 @@ OPTIONS
 	default is not to do `-x` so this option is a no-op.
 
 -m parent-number|--mainline parent-number::
-	Usually you cannot revert a merge because you do not know which
+	Usually you cannot cherry-pick a merge because you do not know which
 	side of the merge should be considered the mainline.  This
 	option specifies the parent number (starting from 1) of
 	the mainline and allows cherry-pick to replay the change

Documentation/git-cvsimport.txt

@@ -102,13 +102,17 @@ If you need to pass multiple options, separate them with a comma.
 
 -m::
 	Attempt to detect merges based on the commit message. This option
-	will enable default regexes that try to capture the name source
+	will enable default regexes that try to capture the source
 	branch name from the commit message.
 
 -M <regex>::
 	Attempt to detect merges based on the commit message with a custom
 	regex. It can be used with '-m' to enable the default regexes
 	as well. You must escape forward slashes.
++
+The regex must capture the source branch name in $1.
++
+This option can be used several times to provide several detection regexes.
 
 -S <regex>::
 	Skip paths matching the regex.

Documentation/git-describe.txt

@@ -45,12 +45,26 @@ OPTIONS
 	candidates to describe the input committish consider
 	up to <n> candidates.  Increasing <n> above 10 will take
 	slightly longer but may produce a more accurate result.
+	An <n> of 0 will cause only exact matches to be output.
+
+--exact-match::
+	Only output exact matches (a tag directly references the
+	supplied commit).  This is a synonym for --candidates=0.
 
 --debug::
 	Verbosely display information about the searching strategy
 	being employed to standard error.  The tag name will still
 	be printed to standard out.
 
+--long::
+	Always output the long format (the tag, the number of commits
+	and the abbreviated commit name) even when it matches a tag.
+	This is useful when you want to see parts of the commit object name
+	in "describe" output, even when the commit in question happens to be
+	a tagged version.  Instead of just emitting the tag name, it will
+	describe such a commit as v1.2-0-deadbeef (0th commit since tag v1.2
+	that points at object deadbeef....).
+
 --match <pattern>::
 	Only consider tags matching the given pattern (can be used to avoid
 	leaking private tags made from the repository).

Documentation/git-fetch-pack.txt

@@ -8,7 +8,7 @@ git-fetch-pack - Receive missing objects from another repository
 
 SYNOPSIS
 --------
-'git-fetch-pack' [--all] [--quiet|-q] [--keep|-k] [--thin] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]
+'git-fetch-pack' [--all] [--quiet|-q] [--keep|-k] [--thin] [--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]
 
 DESCRIPTION
 -----------
@@ -45,6 +45,12 @@ OPTIONS
 	Spend extra cycles to minimize the number of objects to be sent.
 	Use it on slower connection.
 
+\--include-tag::
+	If the remote side supports it, annotated tags objects will
+	be downloaded on the same connection as the other objects if
+	the object the tag references is downloaded.  The caller must
+	otherwise determine the tags this option made available.
+
 \--upload-pack=<git-upload-pack>::
 	Use this to specify the path to 'git-upload-pack' on the
 	remote side, if is not found on your $PATH.

Documentation/git-filter-branch.txt

@@ -56,7 +56,9 @@ notable exception of the commit filter, for technical reasons).
 Prior to that, the $GIT_COMMIT environment variable will be set to contain
 the id of the commit being rewritten.  Also, GIT_AUTHOR_NAME,
 GIT_AUTHOR_EMAIL, GIT_AUTHOR_DATE, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL,
-and GIT_COMMITTER_DATE are set according to the current commit.
+and GIT_COMMITTER_DATE are set according to the current commit. If any
+evaluation of <command> returns a non-zero exit status, the whole operation
+will be aborted.
 
 A 'map' function is available that takes an "original sha1 id" argument
 and outputs a "rewritten sha1 id" if the commit has been already
@@ -197,7 +199,7 @@ happened).  If this is not the case, use:
 
 --------------------------------------------------------------------------
 git filter-branch --parent-filter \
-	'cat; test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>"' HEAD
+	'test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>" || cat' HEAD
 --------------------------------------------------------------------------
 
 or even simpler:
@@ -240,6 +242,15 @@ committed a merge between P1 and P2, it will be propagated properly
 and all children of the merge will become merge commits with P1,P2
 as their parents instead of the merge commit.
 
+You can rewrite the commit log messages using `--message-filter`.  For
+example, `git-svn-id` strings in a repository created by `git-svn` can
+be removed this way:
+
+-------------------------------------------------------
+git filter-branch --message-filter '
+	sed -e "/^git-svn-id:/d"
+'
+-------------------------------------------------------
 
 To restrict rewriting to only part of the history, specify a revision
 range in addition to the new branch name.  The new branch name will

Documentation/git-format-patch.txt

@@ -10,13 +10,15 @@ SYNOPSIS
 --------
 [verse]
 'git-format-patch' [-k] [-o <dir> | --stdout] [--thread]
-                   [--attach[=<boundary>] | --inline[=<boundary>]]
-                   [-s | --signoff] [<common diff options>]
-                   [-n | --numbered | -N | --no-numbered]
-                   [--start-number <n>] [--numbered-files]
-                   [--in-reply-to=Message-Id] [--suffix=.<sfx>]
-                   [--ignore-if-in-upstream]
-                   [--subject-prefix=Subject-Prefix]
+		   [--attach[=<boundary>] | --inline[=<boundary>]]
+		   [-s | --signoff] [<common diff options>]
+		   [-n | --numbered | -N | --no-numbered]
+		   [--start-number <n>] [--numbered-files]
+		   [--in-reply-to=Message-Id] [--suffix=.<sfx>]
+		   [--ignore-if-in-upstream]
+		   [--subject-prefix=Subject-Prefix]
+		   [--cc=<email>]
+		   [--cover-letter]
 		   [ <since> | <revision range> ]
 
 DESCRIPTION
@@ -135,6 +137,15 @@ include::diff-options.txt[]
 	allows for useful naming of a patch series, and can be
 	combined with the --numbered option.
 
+--cc=<email>::
+	Add a "Cc:" header to the email headers. This is in addition
+	to any configured headers, and may be used multiple times.
+
+--cover-letter::
+	Generate a cover letter template.  You still have to fill in
+	a description, but the shortlog and the diffstat will be
+	generated for you.
+
 --suffix=.<sfx>::
 	Instead of using `.patch` as the suffix for generated
 	filenames, use specified suffix.  A common alternative is

Documentation/git-gc.txt

@@ -8,7 +8,7 @@ git-gc - Cleanup unnecessary files and optimize the local repository
 
 SYNOPSIS
 --------
-'git-gc' [--prune] [--aggressive] [--auto]
+'git-gc' [--aggressive] [--auto] [--quiet]
 
 DESCRIPTION
 -----------
@@ -25,17 +25,6 @@ operating performance. Some git commands may automatically run
 OPTIONS
 -------
 
---prune::
-	Usually `git-gc` packs refs, expires old reflog entries,
-	packs loose objects,
-	and removes old 'rerere' records.  Removal
-	of unreferenced loose objects is an unsafe operation
-	while other git operations are in progress, so it is not
-	done by default.  Pass this option if you want it, and only
-	when you know nobody else is creating new objects in the
-	repository at the same time (e.g. never use this option
-	in a cron script).
-
 --aggressive::
 	Usually 'git-gc' runs very quickly while providing good disk
 	space utilization and performance.  This option will cause
@@ -63,6 +52,9 @@ are consolidated into a single pack by using the `-A` option of
 `git-repack`. Setting `gc.autopacklimit` to 0 disables
 automatic consolidation of packs.
 
+--quiet::
+	Suppress all progress reports.
+
 Configuration
 -------------
 
@@ -101,6 +93,10 @@ the value, the more time is spent optimizing the delta compression.  See
 the documentation for the --window' option in linkgit:git-repack[1] for
 more details.  This defaults to 10.
 
+The optional configuration variable 'gc.pruneExpire' controls how old
+the unreferenced loose objects have to be before they are pruned.  The
+default is "2 weeks ago".
+
 See Also
 --------
 linkgit:git-prune[1]

Documentation/git-grep.txt

@@ -78,7 +78,7 @@ OPTIONS
 -l | --files-with-matches | --name-only | -L | --files-without-match::
 	Instead of showing every matched line, show only the
 	names of files that contain (or do not contain) matches.
-	For better compatability with git-diff, --name-only is a
+	For better compatibility with git-diff, --name-only is a
 	synonym for --files-with-matches.
 
 -c | --count::

Documentation/git-help.txt

@@ -33,17 +33,21 @@ OPTIONS
 	option supersedes any other option.
 
 -i|--info::
-	Use the 'info' program to display the manual page, instead of
-	the 'man' program that is used by default.
+	Display manual page for the command in the 'info' format. The
+	'info' program will be used for that purpose.
 
 -m|--man::
-	Use the 'man' program to display the manual page. This may be
-	used to override a value set in the 'help.format'
-	configuration variable.
+	Display manual page for the command in the 'man' format. This
+	option may be used to override a value set in the
+	'help.format' configuration variable.
++
+By default the 'man' program will be used to display the manual page,
+but the 'man.viewer' configuration variable may be used to choose
+other display programs (see below).
 
 -w|--web::
-	Use a web browser to display the HTML manual page, instead of
-	the 'man' program that is used by default.
+	Display manual page for the command in the 'web' (HTML)
+	format. A web browser will be used for that purpose.
 +
 The web browser can be specified using the configuration variable
 'help.browser', or 'web.browser' if the former is not set. If none of
@@ -54,6 +58,9 @@ linkgit:git-web--browse[1] for more information about this.
 CONFIGURATION VARIABLES
 -----------------------
 
+help.format
+~~~~~~~~~~~
+
 If no command line option is passed, the 'help.format' configuration
 variable will be checked. The following values are supported for this
 variable; they make 'git-help' behave as their corresponding command
@@ -61,15 +68,47 @@ line option:
 
 * "man" corresponds to '-m|--man',
 * "info" corresponds to '-i|--info',
-* "web" or "html" correspond to '-w|--web',
+* "web" or "html" correspond to '-w|--web'.
+
+help.browser, web.browser and browser.<tool>.path
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The 'help.browser', 'web.browser' and 'browser.<tool>.path' will also
 be checked if the 'web' format is chosen (either by command line
 option or configuration variable). See '-w|--web' in the OPTIONS
 section above and linkgit:git-web--browse[1].
 
-Note that these configuration variables should probably be set using
-the '--global' flag, for example like this:
+man.viewer
+~~~~~~~~~~
+
+The 'man.viewer' config variable will be checked if the 'man' format
+is chosen. Only the following values are currently supported:
+
+* "man": use the 'man' program as usual,
+* "woman": use 'emacsclient' to launch the "woman" mode in emacs
+(this only works starting with emacsclient versions 22),
+* "konqueror": use a man KIO slave in konqueror.
+
+Multiple values may be given to this configuration variable. Their
+corresponding programs will be tried in the order listed in the
+configuration file.
+
+For example, this configuration:
+
+	[man]
+		viewer = konqueror
+		viewer = woman
+
+will try to use konqueror first. But this may fail (for example if
+DISPLAY is not set) and in that case emacs' woman mode will be tried.
+
+If everything fails the 'man' program will be tried anyway.
+
+Note about git config --global
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Note that all these configuration variables should probably be set
+using the '--global' flag, for example like this:
 
 ------------------------------------------------
 $ git config --global help.format web

Documentation/git-index-pack.txt

@@ -75,6 +75,9 @@ OPTIONS
 	to force the version for the generated pack index, and to force
 	64-bit index entries on objects located above the given offset.
 
+--strict::
+	Die, if the pack contains broken objects or links.
+
 
 Note
 ----

Documentation/git-merge.txt

@@ -68,7 +68,8 @@ HOW MERGE WORKS
 ---------------
 
 A merge is always between the current `HEAD` and one or more
-remote branch heads, and the index file must exactly match the
+commits (usually, branch head or tag), and the index file must
+exactly match the
 tree of `HEAD` commit (i.e. the contents of the last commit) when
 it happens.  In other words, `git-diff --cached HEAD` must
 report no changes.

Documentation/git-mergetool.txt

@@ -12,12 +12,12 @@ SYNOPSIS
 DESCRIPTION
 -----------
 
-Use 'git mergetool' to run one of several merge utilities to resolve
+Use `git mergetool` to run one of several merge utilities to resolve
 merge conflicts.  It is typically run after linkgit:git-merge[1].
 
 If one or more <file> parameters are given, the merge tool program will
 be run to resolve differences on each file.  If no <file> names are
-specified, 'git mergetool' will run the merge tool program on every file
+specified, `git mergetool` will run the merge tool program on every file
 with merge conflicts.
 
 OPTIONS
@@ -27,16 +27,38 @@ OPTIONS
 	Valid merge tools are:
 	kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, and opendiff
 +
-If a merge resolution program is not specified, 'git mergetool'
-will use the configuration variable merge.tool.  If the
-configuration variable merge.tool is not set, 'git mergetool'
+If a merge resolution program is not specified, `git mergetool`
+will use the configuration variable `merge.tool`.  If the
+configuration variable `merge.tool` is not set, `git mergetool`
 will pick a suitable default.
 +
 You can explicitly provide a full path to the tool by setting the
-configuration variable mergetool.<tool>.path. For example, you
+configuration variable `mergetool.<tool>.path`. For example, you
 can configure the absolute path to kdiff3 by setting
-mergetool.kdiff3.path. Otherwise, 'git mergetool' assumes the tool
-is available in PATH.
+`mergetool.kdiff3.path`. Otherwise, `git mergetool` assumes the
+tool is available in PATH.
++
+Instead of running one of the known merge tool programs
+`git mergetool` can be customized to run an alternative program
+by specifying the command line to invoke in a configration
+variable `mergetool.<tool>.cmd`.
++
+When `git mergetool` is invoked with this tool (either through the
+`-t` or `--tool` option or the `merge.tool` configuration
+variable) the configured command line will be invoked with `$BASE`
+set to the name of a temporary file containing the common base for
+the merge, if available; `$LOCAL` set to the name of a temporary
+file containing the contents of the file on the current branch;
+`$REMOTE` set to the name of a temporary file containing the
+contents of the file to be merged, and `$MERGED` set to the name
+of the file to which the merge tool should write the result of the
+merge resolution.
++
+If the custom merge tool correctly indicates the success of a
+merge resolution with its exit code then the configuration
+variable `mergetool.<tool>.trustExitCode` can be set to `true`.
+Otherwise, `git mergetool` will prompt the user to indicate the
+success of the resolution after the custom tool has exited.
 
 Author
 ------

Documentation/git-pack-objects.txt

@@ -73,6 +73,11 @@ base-name::
 	as if all refs under `$GIT_DIR/refs` are specified to be
 	included.
 
+--include-tag::
+	Include unasked-for annotated tags if the object they
+	reference was included in the resulting packfile.  This
+	can be useful to send new tags to native git clients.
+
 --window=[N], --depth=[N]::
 	These two options affect how the objects contained in
 	the pack are stored using delta compression.  The
@@ -177,6 +182,8 @@ base-name::
 	This is meant to reduce packing time on multiprocessor machines.
 	The required amount of memory for the delta search window is
 	however multiplied by the number of threads.
+	Specifying 0 will cause git to auto-detect the number of CPU's
+	and set the number of threads accordingly.
 
 --index-version=<version>[,<offset>]::
 	This is intended to be used by the test suite only. It allows

Documentation/git-pull.txt

@@ -21,6 +21,8 @@ Note that you can use `.` (current directory) as the
 <repository> to pull from the local repository -- this is useful
 when merging local branches into the current branch.
 
+Also note that options meant for `git-pull` itself and underlying
+`git-merge` must be given before the options meant for `git-fetch`.
 
 OPTIONS
 -------

Documentation/git-rebase.txt

@@ -9,6 +9,7 @@ SYNOPSIS
 --------
 [verse]
 'git-rebase' [-i | --interactive] [-v | --verbose] [-m | --merge]
+	[-s <strategy> | --strategy=<strategy>]
 	[-C<n>] [ --whitespace=<option>] [-p | --preserve-merges]
 	[--onto <newbase>] <upstream> [<branch>]
 'git-rebase' --continue | --skip | --abort
@@ -261,8 +262,7 @@ hook if one exists.  You can use this hook to do sanity checks and
 reject the rebase if it isn't appropriate.  Please see the template
 pre-rebase hook script for an example.
 
-You must be in the top directory of your project to start (or continue)
-a rebase.  Upon completion, <branch> will be the current branch.
+Upon completion, <branch> will be the current branch.
 
 INTERACTIVE MODE
 ----------------

Documentation/git-reflog.txt

@@ -19,6 +19,8 @@ depending on the subcommand:
 git reflog expire [--dry-run] [--stale-fix] [--verbose]
 	[--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...
 
+git reflog delete ref@\{specifier\}...
+
 git reflog [show] [log-options] [<ref>]
 
 Reflog is a mechanism to record when the tip of branches are
@@ -43,6 +45,9 @@ two moves ago", `master@\{one.week.ago\}` means "where master used to
 point to one week ago", and so on. See linkgit:git-rev-parse[1] for
 more details.
 
+To delete single entries from the reflog, use the subcommand "delete"
+and specify the _exact_ entry (e.g. ``git reflog delete master@\{2\}'').
+
 
 OPTIONS
 -------
@@ -75,6 +80,15 @@ them.
 --all::
 	Instead of listing <refs> explicitly, prune all refs.
 
+--updateref::
+	Update the ref with the sha1 of the top reflog entry (i.e.
+	<ref>@\{0\}) after expiring or deleting.
+
+--rewrite::
+	While expiring or deleting, adjust each reflog entry to ensure
+	that the `old` sha1 field points to the `new` sha1 field of the
+	previous entry.
+
 --verbose::
 	Print extra information on screen.
 

Documentation/git-rev-list.txt

@@ -20,6 +20,9 @@ SYNOPSIS
 	     [ \--full-history ]
 	     [ \--not ]
 	     [ \--all ]
+	     [ \--branches ]
+	     [ \--tags ]
+	     [ \--remotes ]
 	     [ \--stdin ]
 	     [ \--quiet ]
 	     [ \--topo-order ]
@@ -31,6 +34,7 @@ SYNOPSIS
 	     [ \--(author|committer|grep)=<pattern> ]
 	     [ \--regexp-ignore-case | \-i ]
 	     [ \--extended-regexp | \-E ]
+	     [ \--fixed-strings | \-F ]
 	     [ \--date={local|relative|default|iso|rfc|short} ]
 	     [ [\--objects | \--objects-edge] [ \--unpacked ] ]
 	     [ \--pretty | \--header ]

Documentation/git-rev-parse.txt

@@ -325,7 +325,7 @@ The lines after the separator describe the options.
 Each line of options has this format:
 
 ------------
-<opt_spec><arg_spec>? SP+ help LF
+<opt_spec><flags>* SP+ help LF
 ------------
 
 `<opt_spec>`::
@@ -334,10 +334,17 @@ Each line of options has this format:
 	is necessary. `h,help`, `dry-run` and `f` are all three correct
 	`<opt_spec>`.
 
-`<arg_spec>`::
-	an `<arg_spec>` tells the option parser if the option has an argument
-	(`=`), an optional one (`?` though its use is discouraged) or none
-	(no `<arg_spec>` in that case).
+`<flags>`::
+	`<flags>` are of `*`, `=`, `?` or `!`.
+	* Use `=` if the option takes an argument.
+
+	* Use `?` to mean that the option is optional (though its use is discouraged).
+
+	* Use `*` to mean that this option should not be listed in the usage
+	  generated for the `-h` argument. It's shown for `--help-all` as
+	  documented in linkgit:gitcli[5].
+
+	* Use `!` to not make the corresponding negated long option available.
 
 The remainder of the line, after stripping the spaces, is used
 as the help associated to the option.

Documentation/git-stash.txt

@@ -8,7 +8,7 @@ git-stash - Stash the changes in a dirty working directory away
 SYNOPSIS
 --------
 [verse]
-'git-stash' (list | show [<stash>] | apply [<stash>] | clear)
+'git-stash' (list | show [<stash>] | apply [<stash>] | clear | drop [<stash>] | pop [<stash>])
 'git-stash' [save [<message>]]
 
 DESCRIPTION
@@ -85,6 +85,17 @@ clear::
 	Remove all the stashed states. Note that those states will then
 	be subject to pruning, and may be difficult or impossible to recover.
 
+drop [<stash>]::
+
+	Remove a single stashed state from the stash list. When no `<stash>`
+	is given, it removes the latest one. i.e. `stash@\{0}`
+
+pop [<stash>]::
+
+	Remove a single stashed state from the stash list and apply on top
+	of the current working tree state. When no `<stash>` is given,
+	`stash@\{0}` is assumed. See also `apply`.
+
 
 DISCUSSION
 ----------

Documentation/git-submodule.txt

@@ -12,14 +12,16 @@ SYNOPSIS
 'git-submodule' [--quiet] add [-b branch] [--] <repository> [<path>]
 'git-submodule' [--quiet] status [--cached] [--] [<path>...]
 'git-submodule' [--quiet] [init|update] [--] [<path>...]
+'git-submodule' [--quiet] summary [--summary-limit <n>] [commit] [--] [<path>...]
 
 
 COMMANDS
 --------
 add::
 	Add the given repository as a submodule at the given path
-	to the changeset to be committed next.  In particular, the
-	repository is cloned at the specified path, added to the
+	to the changeset to be committed next.  If path is a valid
+	repository within the project, it is added as is. Otherwise,
+	repository is cloned at the specified path. path is added to the
 	changeset and registered in .gitmodules.   If no path is
 	specified, the path is deduced from the repository specification.
 	If the repository url begins with ./ or ../, it is stored as
@@ -46,6 +48,11 @@ update::
 	checkout the commit specified in the index of the containing repository.
 	This will make the submodules HEAD be detached.
 
+summary::
+	Show commit summary between the given commit (defaults to HEAD) and
+	working tree/index. For a submodule in question, a series of commits
+	in the submodule between the given super project commit and the
+	index or working tree (switched by --cached) are shown.
 
 OPTIONS
 -------
@@ -56,9 +63,16 @@ OPTIONS
 	Branch of repository to add as submodule.
 
 --cached::
-	Display the SHA-1 stored in the index, not the SHA-1 of the currently
-	checked out submodule commit. This option is only valid for the
-	status command.
+	This option is only valid for status and summary commands.  These
+	commands typically use the commit found in the submodule HEAD, but
+	with this option, the commit stored in the index is used instead.
+
+-n, --summary-limit::
+	This option is only valid for the summary command.
+	Limit the summary size (number of commits shown in total).
+	Giving 0 will disable the summary; a negative number means unlimted
+	(the default). This limit only applies to modified submodules. The
+	size is always limited to 1 for added/deleted/typechanged submodules.
 
 <path>::
 	Path to submodule(s). When specified this will restrict the command

Documentation/git-svn.txt

@@ -159,6 +159,10 @@ New features:
 	our version of --pretty=oneline
 --
 +
+NOTE: SVN itself only stores times in UTC and nothing else. The regular svn
+client converts the UTC time to the local time (or based on the TZ=
+environment). This command has the same behaviour.
++
 Any other arguments are passed directly to `git log'
 
 'blame'::

Documentation/git-verify-pack.txt

@@ -32,11 +32,11 @@ OUTPUT FORMAT
 -------------
 When specifying the -v option the format used is:
 
-	SHA1 type size offset-in-packfile
+	SHA1 type size size-in-pack-file offset-in-packfile
 
 for objects that are not deltified in the pack, and
 
-	SHA1 type size offset-in-packfile depth base-SHA1
+	SHA1 type size size-in-packfile offset-in-packfile depth base-SHA1
 
 for objects that are deltified.
 

Documentation/git-web--browse.txt

@@ -27,6 +27,8 @@ The following browsers (or commands) are currently supported:
 * dillo
 * open (this is the default under Mac OS X GUI)
 
+Custom commands may also be specified.
+
 OPTIONS
 -------
 -b BROWSER|--browser=BROWSER::
@@ -43,16 +45,35 @@ OPTIONS
 CONFIGURATION VARIABLES
 -----------------------
 
+CONF.VAR (from -c option) and web.browser
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
 The web browser can be specified using a configuration variable passed
 with the -c (or --config) command line option, or the 'web.browser'
 configuration variable if the former is not used.
 
+browser.<tool>.path
+~~~~~~~~~~~~~~~~~~~
+
 You can explicitly provide a full path to your preferred browser by
 setting the configuration variable 'browser.<tool>.path'. For example,
 you can configure the absolute path to firefox by setting
 'browser.firefox.path'. Otherwise, 'git-web--browse' assumes the tool
 is available in PATH.
 
+browser.<tool>.cmd
+~~~~~~~~~~~~~~~~~~
+
+When the browser, specified by options or configuration variables, is
+not among the supported ones, then the corresponding
+'browser.<tool>.cmd' configuration variable will be looked up. If this
+variable exists then "git web--browse" will treat the specified tool
+as a custom command and will use a shell eval to run the command with
+the URLs passed as arguments.
+
+Note about git config --global
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
 Note that these configuration variables should probably be set using
 the '--global' flag, for example like this:
 

Documentation/git-whatchanged.txt

@@ -38,11 +38,6 @@ OPTIONS
 	Show git internal diff output, but for the whole tree,
 	not just the top level.
 
---pretty=<format>::
-	Controls the output format for the commit logs.
-	<format> can be one of 'raw', 'medium', 'short', 'full',
-	and 'oneline'.
-
 -m::
 	By default, differences for merge commits are not shown.
 	With this flag, show differences to that commit from all
@@ -51,6 +46,10 @@ OPTIONS
 However, it is not very useful in general, although it
 *is* useful on a file-by-file basis.
 
+include::pretty-options.txt[]
+
+include::pretty-formats.txt[]
+
 Examples
 --------
 git-whatchanged -p v2.6.12.. include/scsi drivers/scsi::

Documentation/git.txt

@@ -43,9 +43,11 @@ unreleased) version of git, that is available from 'master'
 branch of the `git.git` repository.
 Documentation for older releases are available here:
 
-* link:v1.5.4.2/git.html[documentation for release 1.5.4.2]
+* link:v1.5.4.4/git.html[documentation for release 1.5.4.4]
 
 * release notes for
+  link:RelNotes-1.5.4.4.txt[1.5.4.4],
+  link:RelNotes-1.5.4.3.txt[1.5.4.3],
   link:RelNotes-1.5.4.2.txt[1.5.4.2],
   link:RelNotes-1.5.4.1.txt[1.5.4.1],
   link:RelNotes-1.5.4.txt[1.5.4].

Documentation/manpage-1.72.xsl

@@ -1,5 +1,9 @@
-<!-- callout.xsl: converts asciidoc callouts to man page format -->
+<!-- Based on callouts.xsl. Fixes man page callouts for DocBook 1.72 XSL -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+
+<xsl:param name="man.output.quietly" select="1"/>
+<xsl:param name="refentry.meta.get.quietly" select="1"/>
+
 <xsl:template match="co">
 	<xsl:value-of select="concat('&#x2593;fB(',substring-after(@id,'-'),')&#x2593;fR')"/>
 </xsl:template>

Documentation/pretty-options.txt

@@ -4,6 +4,9 @@
 	where '<format>' can be one of 'oneline', 'short', 'medium',
 	'full', 'fuller', 'email', 'raw' and 'format:<string>'.
 	When omitted, the format defaults to 'medium'.
++
+Note: you can specify the default pretty format in the repository
+configuration (see linkgit:git-config[1]).
 
 --abbrev-commit::
 	Instead of showing the full 40-byte hexadecimal commit object

Documentation/rev-list-options.txt

@@ -130,9 +130,11 @@ limiting may be applied.
 
 	Show commits older than a specific date.
 
+ifdef::git-rev-list[]
 --max-age='timestamp', --min-age='timestamp'::
 
 	Limit the commits output to specified time range.
+endif::git-rev-list[]
 
 --author='pattern', --committer='pattern'::
 
@@ -153,6 +155,11 @@ limiting may be applied.
 	Consider the limiting patterns to be extended regular expressions
 	instead of the default basic regular expressions.
 
+-F, --fixed-strings::
+
+	Consider the limiting patterns to be fixed strings (don't interpret
+	pattern as a regular expression).
+
 --remove-empty::
 
 	Stop when a given path disappears from the tree.

Documentation/technical/api-diff.txt

@@ -39,7 +39,7 @@ Calling sequence
 * Once you finish feeding the pairs of files, call `diffcore_std()`.
   This will tell the diffcore library to go ahead and do its work.
 
-* Calling `diffcore_flush()` will produce the output.
+* Calling `diff_flush()` will produce the output.
 
 
 Data structures

Documentation/technical/api-run-command.txt

@@ -49,7 +49,7 @@ Functions
 
 `finish_async`::
 
-	Wait for the completeion of an asynchronous function that was
+	Wait for the completion of an asynchronous function that was
 	started with start_async().
 
 
@@ -111,9 +111,10 @@ stderr as follows:
 	.no_stdin, .no_stdout, .no_stderr: The respective channel is
 		redirected to /dev/null.
 
-	.stdout_to_stderr: stdout of the child is redirected to the
-		parent's stderr (i.e. *not* to what .err or
-		.no_stderr specify).
+	.stdout_to_stderr: stdout of the child is redirected to its
+		stderr. This happens after stderr is itself redirected.
+		So stdout will follow stderr to wherever it is
+		redirected.
 
 To modify the environment of the sub-process, specify an array of
 string pointers (NULL terminated) in .env:
@@ -121,8 +122,8 @@ string pointers (NULL terminated) in .env:
 . If the string is of the form "VAR=value", i.e. it contains '='
   the variable is added to the child process's environment.
 
-. If the string does not contain '=', it names an environement
-  variable that will be removed from the child process's envionment.
+. If the string does not contain '=', it names an environment
+  variable that will be removed from the child process's environment.
 
 To specify a new initial working directory for the sub-process,
 specify it in the .dir member.

Documentation/urls.txt

@@ -44,3 +44,26 @@ endif::git-clone[]
 ifdef::git-clone[]
 They are equivalent, except the former implies --local option.
 endif::git-clone[]
+
+
+If there are a large number of similarly-named remote repositories and
+you want to use a different format for them (such that the URLs you
+use will be rewritten into URLs that work), you can create a
+configuration section of the form:
+
+------------
+	[url "<actual url base>"]
+		insteadOf = <other url base>
+------------
+
+For example, with this:
+
+------------
+	[url "git://git.host.xz/"]
+		insteadOf = host.xz:/path/to/
+		insteadOf = work:
+------------
+
+a URL like "work:repo.git" or like "host.xz:/path/to/repo.git" will be
+rewritten in any context that takes a URL to be "git://git.host.xz/repo.git".
+

GIT-VERSION-GEN

@@ -16,7 +16,8 @@ elif test -d .git &&
 	case "$VN" in
 	*$LF*) (exit 1) ;;
 	v[0-9]*)
-		git diff-index --quiet HEAD || VN="$VN-dirty" ;;
+		test -z "$(git diff-index --name-only HEAD)" ||
+		VN="$VN-dirty" ;;
 	esac
 then
 	VN=$(echo "$VN" | sed -e 's/-/./g');

Makefile

@@ -3,6 +3,10 @@ all::
 
 # Define V=1 to have a more verbose compile.
 #
+# Define SNPRINTF_RETURNS_BOGUS if your are on a system which snprintf()
+# or vsnprintf() return -1 instead of number of characters which would
+# have been written to the final string if enough space had been available.
+#
 # Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
 # when attempting to read from an fopen'ed directory.
 #
@@ -147,6 +151,9 @@ all::
 # is a simplified version of the merge sort used in glibc. This is
 # recommended if Git triggers O(n^2) behavior in your platform's qsort().
 #
+# Define NO_EXTERNAL_GREP if you don't want "git grep" to ever call
+# your external grep (e.g., if your system lacks grep, if its grep is
+# broken, or spawning external process is slower than built-in grep git has).
 
 GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
 	@"$(SHELL_PATH)" ./GIT-VERSION-GEN
@@ -229,7 +236,7 @@ BASIC_CFLAGS =
 BASIC_LDFLAGS =
 
 SCRIPT_SH = \
-	git-bisect.sh git-checkout.sh \
+	git-bisect.sh \
 	git-clone.sh \
 	git-merge-one-file.sh git-mergetool.sh git-parse-remote.sh \
 	git-pull.sh git-rebase.sh git-rebase--interactive.sh \
@@ -246,7 +253,7 @@ SCRIPT_SH = \
 SCRIPT_PERL = \
 	git-add--interactive.perl \
 	git-archimport.perl git-cvsimport.perl git-relink.perl \
-	git-cvsserver.perl git-remote.perl git-cvsexportcommit.perl \
+	git-cvsserver.perl git-cvsexportcommit.perl \
 	git-send-email.perl git-svn.perl
 
 SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
@@ -267,23 +274,24 @@ PROGRAMS = \
 	git-upload-pack$X \
 	git-pack-redundant$X git-var$X \
 	git-merge-tree$X \
-	git-merge-recursive$X \
+	$(POSIX_ONLY_PROGRAMS) \
 	$(EXTRA_PROGRAMS)
 
 # Empty...
 EXTRA_PROGRAMS =
 
+# List built-in command $C whose implementation cmd_$C() is not in
+# builtin-$C.o but is linked in as part of some other command.
 BUILT_INS = \
 	git-format-patch$X git-show$X git-whatchanged$X git-cherry$X \
 	git-get-tar-commit-id$X git-init$X git-repo-config$X \
 	git-fsck-objects$X git-cherry-pick$X git-peek-remote$X git-status$X \
+	git-merge-subtree$X \
 	$(patsubst builtin-%.o,git-%$X,$(BUILTIN_OBJS))
 
 # what 'all' will build and 'install' will install, in gitexecdir
 ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS)
 
-ALL_PROGRAMS += git-merge-subtree$X
-
 # what 'all' will build but not install in gitexecdir
 OTHER_PROGRAMS = git$X gitweb/gitweb.cgi
 
@@ -306,7 +314,8 @@ LIB_H = \
 	run-command.h strbuf.h tag.h tree.h git-compat-util.h revision.h \
 	tree-walk.h log-tree.h dir.h path-list.h unpack-trees.h builtin.h \
 	utf8.h reflog-walk.h patch-ids.h attr.h decorate.h progress.h \
-	mailmap.h remote.h parse-options.h transport.h diffcore.h hash.h
+	mailmap.h remote.h parse-options.h transport.h diffcore.h hash.h ll-merge.h fsck.h \
+	pack-revindex.h compat/mingw.h
 
 DIFF_OBJS = \
 	diff.o diff-lib.o diffcore-break.o diffcore-order.o \
@@ -321,7 +330,7 @@ LIB_OBJS = \
 	patch-ids.o \
 	object.o pack-check.o pack-write.o patch-delta.o path.o pkt-line.o \
 	sideband.o reachable.o reflog-walk.o \
-	quote.o read-cache.o refs.o run-command.o dir.o object-refs.o \
+	quote.o read-cache.o refs.o run-command.o dir.o \
 	server-info.o setup.o sha1_file.o sha1_name.o strbuf.o \
 	tag.o tree.o usage.o config.o environment.o ctype.o copy.o \
 	revision.o pager.o tree-walk.o xdiff-interface.o \
@@ -329,7 +338,8 @@ LIB_OBJS = \
 	alloc.o merge-file.o path-list.o help.o unpack-trees.o $(DIFF_OBJS) \
 	color.o wt-status.o archive-zip.o archive-tar.o shallow.o utf8.o \
 	convert.o attr.o decorate.o progress.o mailmap.o symlinks.o remote.o \
-	transport.o bundle.o walker.o parse-options.o ws.o archive.o
+	transport.o bundle.o walker.o parse-options.o ws.o archive.o branch.o \
+	ll-merge.o alias.o fsck.o pack-revindex.o
 
 BUILTIN_OBJS = \
 	builtin-add.o \
@@ -341,6 +351,7 @@ BUILTIN_OBJS = \
 	builtin-bundle.o \
 	builtin-cat-file.o \
 	builtin-check-attr.o \
+	builtin-checkout.o \
 	builtin-checkout-index.o \
 	builtin-check-ref-format.o \
 	builtin-clean.o \
@@ -371,6 +382,7 @@ BUILTIN_OBJS = \
 	builtin-merge-base.o \
 	builtin-merge-file.o \
 	builtin-merge-ours.o \
+	builtin-merge-recursive.o \
 	builtin-mv.o \
 	builtin-name-rev.o \
 	builtin-pack-objects.o \
@@ -379,6 +391,7 @@ BUILTIN_OBJS = \
 	builtin-push.o \
 	builtin-read-tree.o \
 	builtin-reflog.o \
+	builtin-remote.o \
 	builtin-send-pack.o \
 	builtin-config.o \
 	builtin-rerere.o \
@@ -476,6 +489,7 @@ ifeq ($(uname_S),FreeBSD)
 	NO_MEMMEM = YesPlease
 	BASIC_CFLAGS += -I/usr/local/include
 	BASIC_LDFLAGS += -L/usr/local/lib
+	DIR_HAS_BSD_GROUP_SEMANTICS = YesPlease
 endif
 ifeq ($(uname_S),OpenBSD)
 	NO_STRCASESTR = YesPlease
@@ -542,12 +556,14 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NO_C99_FORMAT = YesPlease
 	NO_STRTOUMAX = YesPlease
 	NO_MKDTEMP = YesPlease
+	SNPRINTF_RETURNS_BOGUS = YesPlease
 	NO_SVN_TESTS = YesPlease
 	NO_PERL_MAKEMAKER = YesPlease
 	NO_R_TO_GCC_LINKER = YesPlease
 	INTERNAL_QSORT = YesPlease
-	NO_EXTRA_PROGRAMS = YesPlease
+	NO_POSIX_ONLY_PROGRAMS = YesPlease
 	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat
+	COMPAT_CFLAGS += -DSNPRINTF_SIZE_CORR=1
 	COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
 	COMPAT_OBJS += compat/mingw.o compat/fnmatch.o compat/regex.o
 	EXTLIBS += -lws2_32
@@ -616,8 +632,8 @@ ifdef ZLIB_PATH
 endif
 EXTLIBS += -lz
 
-ifndef NO_EXTRA_PROGRAMS
-	EXTRA_PROGRAMS += \
+ifndef NO_POSIX_ONLY_PROGRAMS
+	POSIX_ONLY_PROGRAMS = \
 		git-daemon$X \
 		git-imap-send$X
 endif
@@ -663,6 +679,10 @@ endif
 ifdef NO_C99_FORMAT
 	BASIC_CFLAGS += -DNO_C99_FORMAT
 endif
+ifdef SNPRINTF_RETURNS_BOGUS
+	COMPAT_CFLAGS += -DSNPRINTF_RETURNS_BOGUS
+	COMPAT_OBJS += compat/snprintf.o
+endif
 ifdef FREAD_READS_DIRECTORIES
 	COMPAT_CFLAGS += -DFREAD_READS_DIRECTORIES
 	COMPAT_OBJS += compat/fopen.o
@@ -779,6 +799,13 @@ endif
 ifdef THREADED_DELTA_SEARCH
 	BASIC_CFLAGS += -DTHREADED_DELTA_SEARCH
 	EXTLIBS += -lpthread
+	LIB_OBJS += thread-utils.o
+endif
+ifdef DIR_HAS_BSD_GROUP_SEMANTICS
+	COMPAT_CFLAGS += -DDIR_HAS_BSD_GROUP_SEMANTICS
+endif
+ifdef NO_EXTERNAL_GREP
+	BASIC_CFLAGS += -DNO_EXTERNAL_GREP
 endif
 
 ifeq ($(TCLTK_PATH),)
@@ -851,7 +878,7 @@ export TAR INSTALL DESTDIR SHELL_PATH
 
 ### Build rules
 
-all:: $(ALL_PROGRAMS) $(BUILT_INS) $(OTHER_PROGRAMS)
+all:: $(ALL_PROGRAMS) $(BUILT_INS) $(OTHER_PROGRAMS) GIT-BUILD-OPTIONS
 ifneq (,$X)
 	$(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_PROGRAMS) $(BUILT_INS) git$X)), $(RM) '$p';)
 endif
@@ -881,9 +908,6 @@ help.o: help.c common-cmds.h GIT-CFLAGS
 		'-DGIT_MAN_PATH="$(mandir_SQ)"' \
 		'-DGIT_INFO_PATH="$(infodir_SQ)"' $<
 
-git-merge-subtree$X: git-merge-recursive$X
-	$(QUIET_BUILT_IN)$(RM) $@ && ln git-merge-recursive$X $@
-
 $(BUILT_INS): git$X
 	$(QUIET_BUILT_IN)$(RM) $@ && ln git$X $@
 
@@ -895,6 +919,7 @@ common-cmds.h: $(wildcard Documentation/git-*.txt)
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 	$(QUIET_GEN)$(RM) $@ $@+ && \
 	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
+	    -e 's|@SHELL_PATH@|$(SHELL_PATH_SQ)|' \
 	    -e 's|@@PERL@@|$(PERL_PATH_SQ)|g' \
 	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
 	    -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
@@ -1054,6 +1079,9 @@ GIT-CFLAGS: .FORCE-GIT-CFLAGS
 		echo "$$FLAGS" >GIT-CFLAGS; \
             fi
 
+GIT-BUILD-OPTIONS: .FORCE-GIT-BUILD-OPTIONS
+	@echo SHELL_PATH=\''$(SHELL_PATH_SQ)'\' >$@
+
 ### Detect Tck/Tk interpreter path changes
 ifndef NO_TCLTK
 TRACK_VARS = $(subst ','\'',-DTCLTK_PATH='$(TCLTK_PATH_SQ)')
@@ -1154,7 +1182,7 @@ git.spec: git.spec.in
 	mv $@+ $@
 
 GIT_TARNAME=git-$(GIT_VERSION)
-dist: git.spec git-archive configure
+dist: git.spec git-archive$(X) configure
 	./git-archive --format=tar \
 		--prefix=$(GIT_TARNAME)/ HEAD^{tree} > $(GIT_TARNAME).tar
 	@mkdir -p $(GIT_TARNAME)
@@ -1217,10 +1245,11 @@ ifndef NO_TCLTK
 	$(MAKE) -C gitk-git clean
 	$(MAKE) -C git-gui clean
 endif
-	$(RM) GIT-VERSION-FILE GIT-CFLAGS GIT-GUI-VARS
+	$(RM) GIT-VERSION-FILE GIT-CFLAGS GIT-GUI-VARS GIT-BUILD-OPTIONS
 
 .PHONY: all install clean strip
 .PHONY: .FORCE-GIT-VERSION-FILE TAGS tags cscope .FORCE-GIT-CFLAGS
+.PHONY: .FORCE-GIT-BUILD-OPTIONS
 
 ### Check documentation
 #

alias.c

@@ -0,0 +1,22 @@
+#include "cache.h"
+
+static const char *alias_key;
+static char *alias_val;
+static int alias_lookup_cb(const char *k, const char *v)
+{
+	if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
+		if (!v)
+			return config_error_nonbool(k);
+		alias_val = xstrdup(v);
+		return 0;
+	}
+	return 0;
+}
+
+char *alias_lookup(const char *alias)
+{
+	alias_key = alias;
+	alias_val = NULL;
+	git_config(alias_lookup_cb);
+	return alias_val;
+}

branch.c

@@ -0,0 +1,152 @@
+#include "cache.h"
+#include "branch.h"
+#include "refs.h"
+#include "remote.h"
+#include "commit.h"
+
+struct tracking {
+	struct refspec spec;
+	char *src;
+	const char *remote;
+	int matches;
+};
+
+static int find_tracked_branch(struct remote *remote, void *priv)
+{
+	struct tracking *tracking = priv;
+
+	if (!remote_find_tracking(remote, &tracking->spec)) {
+		if (++tracking->matches == 1) {
+			tracking->src = tracking->spec.src;
+			tracking->remote = remote->name;
+		} else {
+			free(tracking->spec.src);
+			if (tracking->src) {
+				free(tracking->src);
+				tracking->src = NULL;
+			}
+		}
+		tracking->spec.src = NULL;
+	}
+
+	return 0;
+}
+
+/*
+ * This is called when new_ref is branched off of orig_ref, and tries
+ * to infer the settings for branch.<new_ref>.{remote,merge} from the
+ * config.
+ */
+static int setup_tracking(const char *new_ref, const char *orig_ref,
+                          enum branch_track track)
+{
+	char key[1024];
+	struct tracking tracking;
+
+	if (strlen(new_ref) > 1024 - 7 - 7 - 1)
+		return error("Tracking not set up: name too long: %s",
+				new_ref);
+
+	memset(&tracking, 0, sizeof(tracking));
+	tracking.spec.dst = (char *)orig_ref;
+	if (for_each_remote(find_tracked_branch, &tracking))
+		return 1;
+
+	if (!tracking.matches)
+		switch (track) {
+		case BRANCH_TRACK_ALWAYS:
+		case BRANCH_TRACK_EXPLICIT:
+			break;
+		default:
+			return 1;
+		}
+
+	if (tracking.matches > 1)
+		return error("Not tracking: ambiguous information for ref %s",
+				orig_ref);
+
+	sprintf(key, "branch.%s.remote", new_ref);
+	git_config_set(key, tracking.remote ?  tracking.remote : ".");
+	sprintf(key, "branch.%s.merge", new_ref);
+	git_config_set(key, tracking.src ? tracking.src : orig_ref);
+	free(tracking.src);
+	printf("Branch %s set up to track %s branch %s.\n", new_ref,
+		tracking.remote ? "remote" : "local", orig_ref);
+
+	return 0;
+}
+
+void create_branch(const char *head,
+		   const char *name, const char *start_name,
+		   int force, int reflog, enum branch_track track)
+{
+	struct ref_lock *lock;
+	struct commit *commit;
+	unsigned char sha1[20];
+	char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
+	int forcing = 0;
+
+	snprintf(ref, sizeof ref, "refs/heads/%s", name);
+	if (check_ref_format(ref))
+		die("'%s' is not a valid branch name.", name);
+
+	if (resolve_ref(ref, sha1, 1, NULL)) {
+		if (!force)
+			die("A branch named '%s' already exists.", name);
+		else if (!is_bare_repository() && !strcmp(head, name))
+			die("Cannot force update the current branch.");
+		forcing = 1;
+	}
+
+	real_ref = NULL;
+	if (get_sha1(start_name, sha1))
+		die("Not a valid object name: '%s'.", start_name);
+
+	switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
+	case 0:
+		/* Not branching from any existing branch */
+		if (track == BRANCH_TRACK_EXPLICIT)
+			die("Cannot setup tracking information; starting point is not a branch.");
+		break;
+	case 1:
+		/* Unique completion -- good */
+		break;
+	default:
+		die("Ambiguous object name: '%s'.", start_name);
+		break;
+	}
+
+	if ((commit = lookup_commit_reference(sha1)) == NULL)
+		die("Not a valid branch point: '%s'.", start_name);
+	hashcpy(sha1, commit->object.sha1);
+
+	lock = lock_any_ref_for_update(ref, NULL, 0);
+	if (!lock)
+		die("Failed to lock ref for update: %s.", strerror(errno));
+
+	if (reflog)
+		log_all_ref_updates = 1;
+
+	if (forcing)
+		snprintf(msg, sizeof msg, "branch: Reset from %s",
+			 start_name);
+	else
+		snprintf(msg, sizeof msg, "branch: Created from %s",
+			 start_name);
+
+	if (real_ref && track)
+		setup_tracking(name, real_ref, track);
+
+	if (write_ref_sha1(lock, sha1, msg) < 0)
+		die("Failed to write ref: %s.", strerror(errno));
+
+	free(real_ref);
+}
+
+void remove_branch_state(void)
+{
+	unlink(git_path("MERGE_HEAD"));
+	unlink(git_path("rr-cache/MERGE_RR"));
+	unlink(git_path("MERGE_MSG"));
+	unlink(git_path("SQUASH_MSG"));
+}

branch.h

@@ -0,0 +1,24 @@
+#ifndef BRANCH_H
+#define BRANCH_H
+
+/* Functions for acting on the information about branches. */
+
+/*
+ * Creates a new branch, where head is the branch currently checked
+ * out, name is the new branch name, start_name is the name of the
+ * existing branch that the new branch should start from, force
+ * enables overwriting an existing (non-head) branch, reflog creates a
+ * reflog for the branch, and track causes the new branch to be
+ * configured to merge the remote branch that start_name is a tracking
+ * branch for (if any).
+ */
+void create_branch(const char *head, const char *name, const char *start_name,
+		   int force, int reflog, enum branch_track track);
+
+/*
+ * Remove information about the state of working on the current
+ * branch. (E.g., MERGE_HEAD)
+ */
+void remove_branch_state(void);
+
+#endif

builtin-add.c

@@ -228,18 +228,6 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		goto finish;
 	}
 
-	if (*argv) {
-		/* Was there an invalid path? */
-		if (pathspec) {
-			int num;
-			for (num = 0; pathspec[num]; num++)
-				; /* just counting */
-			if (argc != num)
-				exit(1); /* error message already given */
-		} else
-			exit(1); /* error message already given */
-	}
-
 	fill_directory(&dir, pathspec, ignored_too);
 
 	if (show_only) {

builtin-apply.c

@@ -161,6 +161,84 @@ struct patch {
 	struct patch *next;
 };
 
+/*
+ * A line in a file, len-bytes long (includes the terminating LF,
+ * except for an incomplete line at the end if the file ends with
+ * one), and its contents hashes to 'hash'.
+ */
+struct line {
+	size_t len;
+	unsigned hash : 24;
+	unsigned flag : 8;
+#define LINE_COMMON     1
+};
+
+/*
+ * This represents a "file", which is an array of "lines".
+ */
+struct image {
+	char *buf;
+	size_t len;
+	size_t nr;
+	size_t alloc;
+	struct line *line_allocated;
+	struct line *line;
+};
+
+static uint32_t hash_line(const char *cp, size_t len)
+{
+	size_t i;
+	uint32_t h;
+	for (i = 0, h = 0; i < len; i++) {
+		if (!isspace(cp[i])) {
+			h = h * 3 + (cp[i] & 0xff);
+		}
+	}
+	return h;
+}
+
+static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
+{
+	ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
+	img->line_allocated[img->nr].len = len;
+	img->line_allocated[img->nr].hash = hash_line(bol, len);
+	img->line_allocated[img->nr].flag = flag;
+	img->nr++;
+}
+
+static void prepare_image(struct image *image, char *buf, size_t len,
+			  int prepare_linetable)
+{
+	const char *cp, *ep;
+
+	memset(image, 0, sizeof(*image));
+	image->buf = buf;
+	image->len = len;
+
+	if (!prepare_linetable)
+		return;
+
+	ep = image->buf + image->len;
+	cp = image->buf;
+	while (cp < ep) {
+		const char *next;
+		for (next = cp; next < ep && *next != '\n'; next++)
+			;
+		if (next < ep)
+			next++;
+		add_line_info(image, cp, next - cp, 0);
+		cp = next;
+	}
+	image->line = image->line_allocated;
+}
+
+static void clear_image(struct image *image)
+{
+	free(image->buf);
+	image->buf = NULL;
+	image->len = 0;
+}
+
 static void say_patch_name(FILE *output, const char *pre,
 			   struct patch *patch, const char *post)
 {
@@ -1437,227 +1515,338 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
 	}
 }
 
-static int find_offset(const char *buf, unsigned long size,
-		       const char *fragment, unsigned long fragsize,
-		       int line, int *lines)
+static void update_pre_post_images(struct image *preimage,
+				   struct image *postimage,
+				   char *buf,
+				   size_t len)
 {
-	int i;
-	unsigned long start, backwards, forwards;
+	int i, ctx;
+	char *new, *old, *fixed;
+	struct image fixed_preimage;
 
-	if (fragsize > size)
-		return -1;
+	/*
+	 * Update the preimage with whitespace fixes.  Note that we
+	 * are not losing preimage->buf -- apply_one_fragment() will
+	 * free "oldlines".
+	 */
+	prepare_image(&fixed_preimage, buf, len, 1);
+	assert(fixed_preimage.nr == preimage->nr);
+	for (i = 0; i < preimage->nr; i++)
+		fixed_preimage.line[i].flag = preimage->line[i].flag;
+	free(preimage->line_allocated);
+	*preimage = fixed_preimage;
 
-	start = 0;
-	if (line > 1) {
-		unsigned long offset = 0;
-		i = line-1;
-		while (offset + fragsize <= size) {
-			if (buf[offset++] == '\n') {
-				start = offset;
-				if (!--i)
-					break;
-			}
+	/*
+	 * Adjust the common context lines in postimage, in place.
+	 * This is possible because whitespace fixing does not make
+	 * the string grow.
+	 */
+	new = old = postimage->buf;
+	fixed = preimage->buf;
+	for (i = ctx = 0; i < postimage->nr; i++) {
+		size_t len = postimage->line[i].len;
+		if (!(postimage->line[i].flag & LINE_COMMON)) {
+			/* an added line -- no counterparts in preimage */
+			memmove(new, old, len);
+			old += len;
+			new += len;
+			continue;
 		}
+
+		/* a common context -- skip it in the original postimage */
+		old += len;
+
+		/* and find the corresponding one in the fixed preimage */
+		while (ctx < preimage->nr &&
+		       !(preimage->line[ctx].flag & LINE_COMMON)) {
+			fixed += preimage->line[ctx].len;
+			ctx++;
+		}
+		if (preimage->nr <= ctx)
+			die("oops");
+
+		/* and copy it in, while fixing the line length */
+		len = preimage->line[ctx].len;
+		memcpy(new, fixed, len);
+		new += len;
+		fixed += len;
+		postimage->line[i].len = len;
+		ctx++;
 	}
 
-	/* Exact line number? */
-	if ((start + fragsize <= size) &&
-	    !memcmp(buf + start, fragment, fragsize))
-		return start;
+	/* Fix the length of the whole thing */
+	postimage->len = new - postimage->buf;
+}
+
+static int match_fragment(struct image *img,
+			  struct image *preimage,
+			  struct image *postimage,
+			  unsigned long try,
+			  int try_lno,
+			  unsigned ws_rule,
+			  int match_beginning, int match_end)
+{
+	int i;
+	char *fixed_buf, *buf, *orig, *target;
+
+	if (preimage->nr + try_lno > img->nr)
+		return 0;
+
+	if (match_beginning && try_lno)
+		return 0;
+
+	if (match_end && preimage->nr + try_lno != img->nr)
+		return 0;
+
+	/* Quick hash check */
+	for (i = 0; i < preimage->nr; i++)
+		if (preimage->line[i].hash != img->line[try_lno + i].hash)
+			return 0;
+
+	/*
+	 * Do we have an exact match?  If we were told to match
+	 * at the end, size must be exactly at try+fragsize,
+	 * otherwise try+fragsize must be still within the preimage,
+	 * and either case, the old piece should match the preimage
+	 * exactly.
+	 */
+	if ((match_end
+	     ? (try + preimage->len == img->len)
+	     : (try + preimage->len <= img->len)) &&
+	    !memcmp(img->buf + try, preimage->buf, preimage->len))
+		return 1;
+
+	if (ws_error_action != correct_ws_error)
+		return 0;
+
+	/*
+	 * The hunk does not apply byte-by-byte, but the hash says
+	 * it might with whitespace fuzz.
+	 */
+	fixed_buf = xmalloc(preimage->len + 1);
+	buf = fixed_buf;
+	orig = preimage->buf;
+	target = img->buf + try;
+	for (i = 0; i < preimage->nr; i++) {
+		size_t fixlen; /* length after fixing the preimage */
+		size_t oldlen = preimage->line[i].len;
+		size_t tgtlen = img->line[try_lno + i].len;
+		size_t tgtfixlen; /* length after fixing the target line */
+		char tgtfixbuf[1024], *tgtfix;
+		int match;
+
+		/* Try fixing the line in the preimage */
+		fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL);
+
+		/* Try fixing the line in the target */
+		if (sizeof(tgtfixbuf) < tgtlen)
+			tgtfix = tgtfixbuf;
+		else
+			tgtfix = xmalloc(tgtlen);
+		tgtfixlen = ws_fix_copy(tgtfix, target, tgtlen, ws_rule, NULL);
+
+		/*
+		 * If they match, either the preimage was based on
+		 * a version before our tree fixed whitespace breakage,
+		 * or we are lacking a whitespace-fix patch the tree
+		 * the preimage was based on already had (i.e. target
+		 * has whitespace breakage, the preimage doesn't).
+		 * In either case, we are fixing the whitespace breakages
+		 * so we might as well take the fix together with their
+		 * real change.
+		 */
+		match = (tgtfixlen == fixlen && !memcmp(tgtfix, buf, fixlen));
+
+		if (tgtfix != tgtfixbuf)
+			free(tgtfix);
+		if (!match)
+			goto unmatch_exit;
+
+		orig += oldlen;
+		buf += fixlen;
+		target += tgtlen;
+	}
+
+	/*
+	 * Yes, the preimage is based on an older version that still
+	 * has whitespace breakages unfixed, and fixing them makes the
+	 * hunk match.  Update the context lines in the postimage.
+	 */
+	update_pre_post_images(preimage, postimage,
+			       fixed_buf, buf - fixed_buf);
+	return 1;
+
+ unmatch_exit:
+	free(fixed_buf);
+	return 0;
+}
+
+static int find_pos(struct image *img,
+		    struct image *preimage,
+		    struct image *postimage,
+		    int line,
+		    unsigned ws_rule,
+		    int match_beginning, int match_end)
+{
+	int i;
+	unsigned long backwards, forwards, try;
+	int backwards_lno, forwards_lno, try_lno;
+
+	if (preimage->nr > img->nr)
+		return -1;
+
+	/*
+	 * If match_begining or match_end is specified, there is no
+	 * point starting from a wrong line that will never match and
+	 * wander around and wait for a match at the specified end.
+	 */
+	if (match_beginning)
+		line = 0;
+	else if (match_end)
+		line = img->nr - preimage->nr;
+
+	if (line > img->nr)
+		line = img->nr;
+
+	try = 0;
+	for (i = 0; i < line; i++)
+		try += img->line[i].len;
 
 	/*
 	 * There's probably some smart way to do this, but I'll leave
 	 * that to the smart and beautiful people. I'm simple and stupid.
 	 */
-	backwards = start;
-	forwards = start;
-	for (i = 0; ; i++) {
-		unsigned long try;
-		int n;
+	backwards = try;
+	backwards_lno = line;
+	forwards = try;
+	forwards_lno = line;
+	try_lno = line;
+
+	for (i = 0; ; i++) {
+		if (match_fragment(img, preimage, postimage,
+				   try, try_lno, ws_rule,
+				   match_beginning, match_end))
+			return try_lno;
+
+	again:
+		if (backwards_lno == 0 && forwards_lno == img->nr)
+			break;
 
-		/* "backward" */
 		if (i & 1) {
-			if (!backwards) {
-				if (forwards + fragsize > size)
-					break;
-				continue;
+			if (backwards_lno == 0) {
+				i++;
+				goto again;
 			}
-			do {
-				--backwards;
-			} while (backwards && buf[backwards-1] != '\n');
+			backwards_lno--;
+			backwards -= img->line[backwards_lno].len;
 			try = backwards;
+			try_lno = backwards_lno;
 		} else {
-			while (forwards + fragsize <= size) {
-				if (buf[forwards++] == '\n')
-					break;
+			if (forwards_lno == img->nr) {
+				i++;
+				goto again;
 			}
+			forwards += img->line[forwards_lno].len;
+			forwards_lno++;
 			try = forwards;
+			try_lno = forwards_lno;
 		}
 
-		if (try + fragsize > size)
-			continue;
-		if (memcmp(buf + try, fragment, fragsize))
-			continue;
-		n = (i >> 1)+1;
-		if (i & 1)
-			n = -n;
-		*lines = n;
-		return try;
 	}
-
-	/*
-	 * We should start searching forward and backward.
-	 */
 	return -1;
 }
 
-static void remove_first_line(const char **rbuf, int *rsize)
+static void remove_first_line(struct image *img)
 {
-	const char *buf = *rbuf;
-	int size = *rsize;
-	unsigned long offset;
-	offset = 0;
-	while (offset <= size) {
-		if (buf[offset++] == '\n')
-			break;
-	}
-	*rsize = size - offset;
-	*rbuf = buf + offset;
+	img->buf += img->line[0].len;
+	img->len -= img->line[0].len;
+	img->line++;
+	img->nr--;
 }
 
-static void remove_last_line(const char **rbuf, int *rsize)
+static void remove_last_line(struct image *img)
 {
-	const char *buf = *rbuf;
-	int size = *rsize;
-	unsigned long offset;
-	offset = size - 1;
-	while (offset > 0) {
-		if (buf[--offset] == '\n')
-			break;
-	}
-	*rsize = offset + 1;
+	img->len -= img->line[--img->nr].len;
 }
 
-static int apply_line(char *output, const char *patch, int plen,
-		      unsigned ws_rule)
+static void update_image(struct image *img,
+			 int applied_pos,
+			 struct image *preimage,
+			 struct image *postimage)
 {
 	/*
-	 * plen is number of bytes to be copied from patch,
-	 * starting at patch+1 (patch[0] is '+').  Typically
-	 * patch[plen] is '\n', unless this is the incomplete
-	 * last line.
+	 * remove the copy of preimage at offset in img
+	 * and replace it with postimage
 	 */
-	int i;
-	int add_nl_to_tail = 0;
-	int fixed = 0;
-	int last_tab_in_indent = 0;
-	int last_space_in_indent = 0;
-	int need_fix_leading_space = 0;
-	char *buf;
+	int i, nr;
+	size_t remove_count, insert_count, applied_at = 0;
+	char *result;
 
-	if ((ws_error_action != correct_ws_error) || !whitespace_error ||
-	    *patch != '+') {
-		memcpy(output, patch + 1, plen);
-		return plen;
-	}
+	for (i = 0; i < applied_pos; i++)
+		applied_at += img->line[i].len;
 
-	/*
-	 * Strip trailing whitespace
-	 */
-	if ((ws_rule & WS_TRAILING_SPACE) &&
-	    (1 < plen && isspace(patch[plen-1]))) {
-		if (patch[plen] == '\n')
-			add_nl_to_tail = 1;
-		plen--;
-		while (0 < plen && isspace(patch[plen]))
-			plen--;
-		fixed = 1;
-	}
+	remove_count = 0;
+	for (i = 0; i < preimage->nr; i++)
+		remove_count += img->line[applied_pos + i].len;
+	insert_count = postimage->len;
 
-	/*
-	 * Check leading whitespaces (indent)
-	 */
-	for (i = 1; i < plen; i++) {
-		char ch = patch[i];
-		if (ch == '\t') {
-			last_tab_in_indent = i;
-			if ((ws_rule & WS_SPACE_BEFORE_TAB) &&
-			    0 < last_space_in_indent)
-			    need_fix_leading_space = 1;
-		} else if (ch == ' ') {
-			last_space_in_indent = i;
-			if ((ws_rule & WS_INDENT_WITH_NON_TAB) &&
-			    8 <= i - last_tab_in_indent)
-				need_fix_leading_space = 1;
-		}
-		else
-			break;
-	}
-
-	buf = output;
-	if (need_fix_leading_space) {
-		int consecutive_spaces = 0;
-		int last = last_tab_in_indent + 1;
-
-		if (ws_rule & WS_INDENT_WITH_NON_TAB) {
-			/* have "last" point at one past the indent */
-			if (last_tab_in_indent < last_space_in_indent)
-				last = last_space_in_indent + 1;
-			else
-				last = last_tab_in_indent + 1;
-		}
+	/* Adjust the contents */
+	result = xmalloc(img->len + insert_count - remove_count + 1);
+	memcpy(result, img->buf, applied_at);
+	memcpy(result + applied_at, postimage->buf, postimage->len);
+	memcpy(result + applied_at + postimage->len,
+	       img->buf + (applied_at + remove_count),
+	       img->len - (applied_at + remove_count));
+	free(img->buf);
+	img->buf = result;
+	img->len += insert_count - remove_count;
+	result[img->len] = '\0';
 
+	/* Adjust the line table */
+	nr = img->nr + postimage->nr - preimage->nr;
+	if (preimage->nr < postimage->nr) {
 		/*
-		 * between patch[1..last], strip the funny spaces,
-		 * updating them to tab as needed.
+		 * NOTE: this knows that we never call remove_first_line()
+		 * on anything other than pre/post image.
 		 */
-		for (i = 1; i < last; i++, plen--) {
-			char ch = patch[i];
-			if (ch != ' ') {
-				consecutive_spaces = 0;
-				*output++ = ch;
-			} else {
-				consecutive_spaces++;
-				if (consecutive_spaces == 8) {
-					*output++ = '\t';
-					consecutive_spaces = 0;
-				}
-			}
-		}
-		while (0 < consecutive_spaces--)
-			*output++ = ' ';
-		fixed = 1;
-		i = last;
+		img->line = xrealloc(img->line, nr * sizeof(*img->line));
+		img->line_allocated = img->line;
 	}
-	else
-		i = 1;
-
-	memcpy(output, patch + i, plen);
-	if (add_nl_to_tail)
-		output[plen++] = '\n';
-	if (fixed)
-		applied_after_fixing_ws++;
-	return output + plen - buf;
+	if (preimage->nr != postimage->nr)
+		memmove(img->line + applied_pos + postimage->nr,
+			img->line + applied_pos + preimage->nr,
+			(img->nr - (applied_pos + preimage->nr)) *
+			sizeof(*img->line));
+	memcpy(img->line + applied_pos,
+	       postimage->line,
+	       postimage->nr * sizeof(*img->line));
+	img->nr = nr;
 }
 
-static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
+static int apply_one_fragment(struct image *img, struct fragment *frag,
 			      int inaccurate_eof, unsigned ws_rule)
 {
 	int match_beginning, match_end;
 	const char *patch = frag->patch;
-	int offset, size = frag->size;
-	char *old = xmalloc(size);
-	char *new = xmalloc(size);
-	const char *oldlines, *newlines;
-	int oldsize = 0, newsize = 0;
+	int size = frag->size;
+	char *old, *new, *oldlines, *newlines;
 	int new_blank_lines_at_end = 0;
 	unsigned long leading, trailing;
-	int pos, lines;
+	int pos, applied_pos;
+	struct image preimage;
+	struct image postimage;
 
+	memset(&preimage, 0, sizeof(preimage));
+	memset(&postimage, 0, sizeof(postimage));
+	oldlines = xmalloc(size);
+	newlines = xmalloc(size);
+
+	old = oldlines;
+	new = newlines;
 	while (size > 0) {
 		char first;
 		int len = linelen(patch, size);
-		int plen;
+		int plen, added;
 		int added_blank_line = 0;
 
 		if (!len)
@@ -1670,7 +1859,7 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
 		 * followed by "\ No newline", then we also remove the
 		 * last one (which is the newline, of course).
 		 */
-		plen = len-1;
+		plen = len - 1;
 		if (len < size && patch[len] == '\\')
 			plen--;
 		first = *patch;
@@ -1687,25 +1876,40 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
 			if (plen < 0)
 				/* ... followed by '\No newline'; nothing */
 				break;
-			old[oldsize++] = '\n';
-			new[newsize++] = '\n';
+			*old++ = '\n';
+			*new++ = '\n';
+			add_line_info(&preimage, "\n", 1, LINE_COMMON);
+			add_line_info(&postimage, "\n", 1, LINE_COMMON);
 			break;
 		case ' ':
 		case '-':
-			memcpy(old + oldsize, patch + 1, plen);
-			oldsize += plen;
+			memcpy(old, patch + 1, plen);
+			add_line_info(&preimage, old, plen,
+				      (first == ' ' ? LINE_COMMON : 0));
+			old += plen;
 			if (first == '-')
 				break;
 		/* Fall-through for ' ' */
 		case '+':
-			if (first != '+' || !no_add) {
-				int added = apply_line(new + newsize, patch,
-						       plen, ws_rule);
-				newsize += added;
-				if (first == '+' &&
-				    added == 1 && new[newsize-1] == '\n')
-					added_blank_line = 1;
+			/* --no-add does not add new lines */
+			if (first == '+' && no_add)
+				break;
+
+			if (first != '+' ||
+			    !whitespace_error ||
+			    ws_error_action != correct_ws_error) {
+				memcpy(new, patch + 1, plen);
+				added = plen;
 			}
+			else {
+				added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws);
+			}
+			add_line_info(&postimage, new, added,
+				      (first == '+' ? 0 : LINE_COMMON));
+			new += added;
+			if (first == '+' &&
+			    added == 1 && new[-1] == '\n')
+				added_blank_line = 1;
 			break;
 		case '@': case '\\':
 			/* Ignore it, we already handled it */
@@ -1722,16 +1926,13 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
 		patch += len;
 		size -= len;
 	}
-
 	if (inaccurate_eof &&
-	    oldsize > 0 && old[oldsize - 1] == '\n' &&
-	    newsize > 0 && new[newsize - 1] == '\n') {
-		oldsize--;
-		newsize--;
+	    old > oldlines && old[-1] == '\n' &&
+	    new > newlines && new[-1] == '\n') {
+		old--;
+		new--;
 	}
 
-	oldlines = old;
-	newlines = new;
 	leading = frag->leading;
 	trailing = frag->trailing;
 
@@ -1752,33 +1953,21 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
 		match_end = !trailing;
 	}
 
-	lines = 0;
-	pos = frag->newpos;
+	pos = frag->newpos ? (frag->newpos - 1) : 0;
+	preimage.buf = oldlines;
+	preimage.len = old - oldlines;
+	postimage.buf = newlines;
+	postimage.len = new - newlines;
+	preimage.line = preimage.line_allocated;
+	postimage.line = postimage.line_allocated;
+
 	for (;;) {
-		offset = find_offset(buf->buf, buf->len,
-				     oldlines, oldsize, pos, &lines);
-		if (match_end && offset + oldsize != buf->len)
-			offset = -1;
-		if (match_beginning && offset)
-			offset = -1;
-		if (offset >= 0) {
-			if (ws_error_action == correct_ws_error &&
-			    (buf->len - oldsize - offset == 0)) /* end of file? */
-				newsize -= new_blank_lines_at_end;
 
-			/* Warn if it was necessary to reduce the number
-			 * of context lines.
-			 */
-			if ((leading != frag->leading) ||
-			    (trailing != frag->trailing))
-				fprintf(stderr, "Context reduced to (%ld/%ld)"
-					" to apply fragment at %d\n",
-					leading, trailing, pos + lines);
+		applied_pos = find_pos(img, &preimage, &postimage, pos,
+				       ws_rule, match_beginning, match_end);
 
-			strbuf_splice(buf, offset, oldsize, newlines, newsize);
-			offset = 0;
+		if (applied_pos >= 0)
 			break;
-		}
 
 		/* Am I at my context limits? */
 		if ((leading <= p_context) && (trailing <= p_context))
@@ -1787,33 +1976,64 @@ static int apply_one_fragment(struct strbuf *buf, struct fragment *frag,
 			match_beginning = match_end = 0;
 			continue;
 		}
+
 		/*
 		 * Reduce the number of context lines; reduce both
 		 * leading and trailing if they are equal otherwise
 		 * just reduce the larger context.
 		 */
 		if (leading >= trailing) {
-			remove_first_line(&oldlines, &oldsize);
-			remove_first_line(&newlines, &newsize);
+			remove_first_line(&preimage);
+			remove_first_line(&postimage);
 			pos--;
 			leading--;
 		}
 		if (trailing > leading) {
-			remove_last_line(&oldlines, &oldsize);
-			remove_last_line(&newlines, &newsize);
+			remove_last_line(&preimage);
+			remove_last_line(&postimage);
 			trailing--;
 		}
 	}
 
-	if (offset && apply_verbosely)
-		error("while searching for:\n%.*s", oldsize, oldlines);
+	if (applied_pos >= 0) {
+		if (ws_error_action == correct_ws_error &&
+		    new_blank_lines_at_end &&
+		    postimage.nr + applied_pos == img->nr) {
+			/*
+			 * If the patch application adds blank lines
+			 * at the end, and if the patch applies at the
+			 * end of the image, remove those added blank
+			 * lines.
+			 */
+			while (new_blank_lines_at_end--)
+				remove_last_line(&postimage);
+		}
 
-	free(old);
-	free(new);
-	return offset;
+		/*
+		 * Warn if it was necessary to reduce the number
+		 * of context lines.
+		 */
+		if ((leading != frag->leading) ||
+		    (trailing != frag->trailing))
+			fprintf(stderr, "Context reduced to (%ld/%ld)"
+				" to apply fragment at %d\n",
+				leading, trailing, applied_pos+1);
+		update_image(img, applied_pos, &preimage, &postimage);
+	} else {
+		if (apply_verbosely)
+			error("while searching for:\n%.*s",
+			      (int)(old - oldlines), oldlines);
+	}
+
+	free(oldlines);
+	free(newlines);
+	free(preimage.line_allocated);
+	free(postimage.line_allocated);
+
+	return (applied_pos < 0);
 }
 
-static int apply_binary_fragment(struct strbuf *buf, struct patch *patch)
+static int apply_binary_fragment(struct image *img, struct patch *patch)
 {
 	struct fragment *fragment = patch->fragments;
 	unsigned long len;
@@ -1830,22 +2050,26 @@ static int apply_binary_fragment(struct strbuf *buf, struct patch *patch)
 	}
 	switch (fragment->binary_patch_method) {
 	case BINARY_DELTA_DEFLATED:
-		dst = patch_delta(buf->buf, buf->len, fragment->patch,
+		dst = patch_delta(img->buf, img->len, fragment->patch,
 				  fragment->size, &len);
 		if (!dst)
 			return -1;
-		/* XXX patch_delta NUL-terminates */
-		strbuf_attach(buf, dst, len, len + 1);
+		clear_image(img);
+		img->buf = dst;
+		img->len = len;
 		return 0;
 	case BINARY_LITERAL_DEFLATED:
-		strbuf_reset(buf);
-		strbuf_add(buf, fragment->patch, fragment->size);
+		clear_image(img);
+		img->len = fragment->size;
+		img->buf = xmalloc(img->len+1);
+		memcpy(img->buf, fragment->patch, img->len);
+		img->buf[img->len] = '\0';
 		return 0;
 	}
 	return -1;
 }
 
-static int apply_binary(struct strbuf *buf, struct patch *patch)
+static int apply_binary(struct image *img, struct patch *patch)
 {
 	const char *name = patch->old_name ? patch->old_name : patch->new_name;
 	unsigned char sha1[20];
@@ -1866,7 +2090,7 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
 		 * See if the old one matches what the patch
 		 * applies to.
 		 */
-		hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
+		hash_sha1_file(img->buf, img->len, blob_type, sha1);
 		if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
 			return error("the patch applies to '%s' (%s), "
 				     "which does not match the "
@@ -1875,14 +2099,14 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
 	}
 	else {
 		/* Otherwise, the old one must be empty. */
-		if (buf->len)
+		if (img->len)
 			return error("the patch applies to an empty "
 				     "'%s' but it is not empty", name);
 	}
 
 	get_sha1_hex(patch->new_sha1_prefix, sha1);
 	if (is_null_sha1(sha1)) {
-		strbuf_release(buf);
+		clear_image(img);
 		return 0; /* deletion patch */
 	}
 
@@ -1897,20 +2121,21 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
 			return error("the necessary postimage %s for "
 				     "'%s' cannot be read",
 				     patch->new_sha1_prefix, name);
-		/* XXX read_sha1_file NUL-terminates */
-		strbuf_attach(buf, result, size, size + 1);
+		clear_image(img);
+		img->buf = result;
+		img->len = size;
 	} else {
 		/*
 		 * We have verified buf matches the preimage;
 		 * apply the patch data to it, which is stored
 		 * in the patch->fragments->{patch,size}.
 		 */
-		if (apply_binary_fragment(buf, patch))
+		if (apply_binary_fragment(img, patch))
 			return error("binary patch does not apply to '%s'",
 				     name);
 
 		/* verify that the result matches */
-		hash_sha1_file(buf->buf, buf->len, blob_type, sha1);
+		hash_sha1_file(img->buf, img->len, blob_type, sha1);
 		if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
 			return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)",
 				name, patch->new_sha1_prefix, sha1_to_hex(sha1));
@@ -1919,7 +2144,7 @@ static int apply_binary(struct strbuf *buf, struct patch *patch)
 	return 0;
 }
 
-static int apply_fragments(struct strbuf *buf, struct patch *patch)
+static int apply_fragments(struct image *img, struct patch *patch)
 {
 	struct fragment *frag = patch->fragments;
 	const char *name = patch->old_name ? patch->old_name : patch->new_name;
@@ -1927,10 +2152,10 @@ static int apply_fragments(struct strbuf *buf, struct patch *patch)
 	unsigned inaccurate_eof = patch->inaccurate_eof;
 
 	if (patch->is_binary)
-		return apply_binary(buf, patch);
+		return apply_binary(img, patch);
 
 	while (frag) {
-		if (apply_one_fragment(buf, frag, inaccurate_eof, ws_rule)) {
+		if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) {
 			error("patch failed: %s:%ld", name, frag->oldpos);
 			if (!apply_with_reject)
 				return -1;
@@ -1966,6 +2191,9 @@ static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
 static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
 {
 	struct strbuf buf;
+	struct image image;
+	size_t len;
+	char *img;
 
 	strbuf_init(&buf, 0);
 	if (cached) {
@@ -1988,9 +2216,14 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
 		}
 	}
 
-	if (apply_fragments(&buf, patch) < 0)
+	img = strbuf_detach(&buf, &len);
+	prepare_image(&image, img, len, !patch->is_binary);
+
+	if (apply_fragments(&image, patch) < 0)
 		return -1; /* note with --reject this succeeds. */
-	patch->result = strbuf_detach(&buf, &patch->resultsize);
+	patch->result = image.buf;
+	patch->resultsize = image.len;
+	free(image.line_allocated);
 
 	if (0 < patch->is_delete && patch->resultsize)
 		return error("removal patch leaves file contents");

builtin-blame.c

@@ -123,8 +123,7 @@ static inline struct origin *origin_incref(struct origin *o)
 static void origin_decref(struct origin *o)
 {
 	if (o && --o->refcnt <= 0) {
-		if (o->file.ptr)
-			free(o->file.ptr);
+		free(o->file.ptr);
 		free(o);
 	}
 }

builtin-branch.c

@@ -12,6 +12,7 @@
 #include "builtin.h"
 #include "remote.h"
 #include "parse-options.h"
+#include "branch.h"
 
 static const char * const builtin_branch_usage[] = {
 	"git-branch [options] [-r | -a]",
@@ -29,8 +30,6 @@ static const char * const builtin_branch_usage[] = {
 static const char *head;
 static unsigned char head_sha1[20];
 
-static int branch_track = 1;
-
 static int branch_use_color = -1;
 static char branch_colors[][COLOR_MAXLEN] = {
 	"\033[m",	/* reset */
@@ -75,10 +74,6 @@ static int git_branch_config(const char *var, const char *value)
 		color_parse(value, var, branch_colors[slot]);
 		return 0;
 	}
-	if (!strcmp(var, "branch.autosetupmerge")) {
-		branch_track = git_config_bool(var, value);
-		return 0;
-	}
 	return git_color_default_config(var, value);
 }
 
@@ -126,8 +121,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
 			continue;
 		}
 
-		if (name)
-			free(name);
+		free(name);
 
 		name = xstrdup(mkpath(fmt, argv[i]));
 		if (!resolve_ref(name, sha1, 1, NULL)) {
@@ -172,8 +166,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
 		}
 	}
 
-	if (name)
-		free(name);
+	free(name);
 
 	return(ret);
 }
@@ -359,141 +352,6 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev, str
 	free_ref_list(&ref_list);
 }
 
-struct tracking {
-	struct refspec spec;
-	char *src;
-	const char *remote;
-	int matches;
-};
-
-static int find_tracked_branch(struct remote *remote, void *priv)
-{
-	struct tracking *tracking = priv;
-
-	if (!remote_find_tracking(remote, &tracking->spec)) {
-		if (++tracking->matches == 1) {
-			tracking->src = tracking->spec.src;
-			tracking->remote = remote->name;
-		} else {
-			free(tracking->spec.src);
-			if (tracking->src) {
-				free(tracking->src);
-				tracking->src = NULL;
-			}
-		}
-		tracking->spec.src = NULL;
-	}
-
-	return 0;
-}
-
-
-/*
- * This is called when new_ref is branched off of orig_ref, and tries
- * to infer the settings for branch.<new_ref>.{remote,merge} from the
- * config.
- */
-static int setup_tracking(const char *new_ref, const char *orig_ref)
-{
-	char key[1024];
-	struct tracking tracking;
-
-	if (strlen(new_ref) > 1024 - 7 - 7 - 1)
-		return error("Tracking not set up: name too long: %s",
-				new_ref);
-
-	memset(&tracking, 0, sizeof(tracking));
-	tracking.spec.dst = (char *)orig_ref;
-	if (for_each_remote(find_tracked_branch, &tracking) ||
-			!tracking.matches)
-		return 1;
-
-	if (tracking.matches > 1)
-		return error("Not tracking: ambiguous information for ref %s",
-				orig_ref);
-
-	if (tracking.matches == 1) {
-		sprintf(key, "branch.%s.remote", new_ref);
-		git_config_set(key, tracking.remote ?  tracking.remote : ".");
-		sprintf(key, "branch.%s.merge", new_ref);
-		git_config_set(key, tracking.src);
-		free(tracking.src);
-		printf("Branch %s set up to track remote branch %s.\n",
-			       new_ref, orig_ref);
-	}
-
-	return 0;
-}
-
-static void create_branch(const char *name, const char *start_name,
-			  int force, int reflog, int track)
-{
-	struct ref_lock *lock;
-	struct commit *commit;
-	unsigned char sha1[20];
-	char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
-	int forcing = 0;
-
-	snprintf(ref, sizeof ref, "refs/heads/%s", name);
-	if (check_ref_format(ref))
-		die("'%s' is not a valid branch name.", name);
-
-	if (resolve_ref(ref, sha1, 1, NULL)) {
-		if (!force)
-			die("A branch named '%s' already exists.", name);
-		else if (!is_bare_repository() && !strcmp(head, name))
-			die("Cannot force update the current branch.");
-		forcing = 1;
-	}
-
-	real_ref = NULL;
-	if (get_sha1(start_name, sha1))
-		die("Not a valid object name: '%s'.", start_name);
-
-	switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
-	case 0:
-		/* Not branching from any existing branch */
-		real_ref = NULL;
-		break;
-	case 1:
-		/* Unique completion -- good */
-		break;
-	default:
-		die("Ambiguous object name: '%s'.", start_name);
-		break;
-	}
-
-	if ((commit = lookup_commit_reference(sha1)) == NULL)
-		die("Not a valid branch point: '%s'.", start_name);
-	hashcpy(sha1, commit->object.sha1);
-
-	lock = lock_any_ref_for_update(ref, NULL, 0);
-	if (!lock)
-		die("Failed to lock ref for update: %s.", strerror(errno));
-
-	if (reflog)
-		log_all_ref_updates = 1;
-
-	if (forcing)
-		snprintf(msg, sizeof msg, "branch: Reset from %s",
-			 start_name);
-	else
-		snprintf(msg, sizeof msg, "branch: Created from %s",
-			 start_name);
-
-	/* When branching off a remote branch, set up so that git-pull
-	   automatically merges from there.  So far, this is only done for
-	   remotes registered via .git/config.  */
-	if (real_ref && track)
-		setup_tracking(name, real_ref);
-
-	if (write_ref_sha1(lock, sha1, msg) < 0)
-		die("Failed to write ref: %s.", strerror(errno));
-
-	if (real_ref)
-		free(real_ref);
-}
-
 static void rename_branch(const char *oldname, const char *newname, int force)
 {
 	char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
@@ -554,14 +412,16 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 {
 	int delete = 0, rename = 0, force_create = 0;
 	int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
-	int reflog = 0, track;
+	int reflog = 0;
+	enum branch_track track;
 	int kinds = REF_LOCAL_BRANCH;
 	struct commit_list *with_commit = NULL;
 
 	struct option options[] = {
 		OPT_GROUP("Generic options"),
 		OPT__VERBOSE(&verbose),
-		OPT_BOOLEAN( 0 , "track",  &track, "set up tracking mode (see git-pull(1))"),
+		OPT_SET_INT( 0 , "track",  &track, "set up tracking mode (see git-pull(1))",
+			BRANCH_TRACK_EXPLICIT),
 		OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
 		OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
 			REF_REMOTE_BRANCH),
@@ -592,7 +452,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	if (branch_use_color == -1)
 		branch_use_color = git_use_color_default;
 
-	track = branch_track;
+	track = git_branch_track;
 	argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
 	if (!!delete + !!rename + !!force_create > 1)
 		usage_with_options(builtin_branch_usage, options);
@@ -618,7 +478,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 	else if (rename && (argc == 2))
 		rename_branch(argv[0], argv[1], rename > 1);
 	else if (argc <= 2)
-		create_branch(argv[0], (argc == 2) ? argv[1] : head,
+		create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 			      force_create, reflog, track);
 	else
 		usage_with_options(builtin_branch_usage, options);

builtin-checkout.c

@@ -0,0 +1,577 @@
+#include "cache.h"
+#include "builtin.h"
+#include "parse-options.h"
+#include "refs.h"
+#include "commit.h"
+#include "tree.h"
+#include "tree-walk.h"
+#include "unpack-trees.h"
+#include "dir.h"
+#include "run-command.h"
+#include "merge-recursive.h"
+#include "branch.h"
+#include "diff.h"
+#include "revision.h"
+#include "remote.h"
+
+static const char * const checkout_usage[] = {
+	"git checkout [options] <branch>",
+	"git checkout [options] [<branch>] -- <file>...",
+	NULL,
+};
+
+static int post_checkout_hook(struct commit *old, struct commit *new,
+			      int changed)
+{
+	struct child_process proc;
+	const char *name = git_path("hooks/post-checkout");
+	const char *argv[5];
+
+	if (access(name, X_OK) < 0)
+		return 0;
+
+	memset(&proc, 0, sizeof(proc));
+	argv[0] = name;
+	argv[1] = xstrdup(sha1_to_hex(old->object.sha1));
+	argv[2] = xstrdup(sha1_to_hex(new->object.sha1));
+	argv[3] = changed ? "1" : "0";
+	argv[4] = NULL;
+	proc.argv = argv;
+	proc.no_stdin = 1;
+	proc.stdout_to_stderr = 1;
+	return run_command(&proc);
+}
+
+static int update_some(const unsigned char *sha1, const char *base, int baselen,
+		       const char *pathname, unsigned mode, int stage)
+{
+	int len;
+	struct cache_entry *ce;
+
+	if (S_ISGITLINK(mode))
+		return 0;
+
+	if (S_ISDIR(mode))
+		return READ_TREE_RECURSIVE;
+
+	len = baselen + strlen(pathname);
+	ce = xcalloc(1, cache_entry_size(len));
+	hashcpy(ce->sha1, sha1);
+	memcpy(ce->name, base, baselen);
+	memcpy(ce->name + baselen, pathname, len - baselen);
+	ce->ce_flags = create_ce_flags(len, 0);
+	ce->ce_mode = create_ce_mode(mode);
+	add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
+	return 0;
+}
+
+static int read_tree_some(struct tree *tree, const char **pathspec)
+{
+	read_tree_recursive(tree, "", 0, 0, pathspec, update_some);
+
+	/* update the index with the given tree's info
+	 * for all args, expanding wildcards, and exit
+	 * with any non-zero return code.
+	 */
+	return 0;
+}
+
+static int checkout_paths(struct tree *source_tree, const char **pathspec)
+{
+	int pos;
+	struct checkout state;
+	static char *ps_matched;
+	unsigned char rev[20];
+	int flag;
+	struct commit *head;
+
+	int newfd;
+	struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+
+	newfd = hold_locked_index(lock_file, 1);
+	read_cache();
+
+	if (source_tree)
+		read_tree_some(source_tree, pathspec);
+
+	for (pos = 0; pathspec[pos]; pos++)
+		;
+	ps_matched = xcalloc(1, pos);
+
+	for (pos = 0; pos < active_nr; pos++) {
+		struct cache_entry *ce = active_cache[pos];
+		pathspec_match(pathspec, ps_matched, ce->name, 0);
+	}
+
+	if (report_path_error(ps_matched, pathspec, 0))
+		return 1;
+
+	memset(&state, 0, sizeof(state));
+	state.force = 1;
+	state.refresh_cache = 1;
+	for (pos = 0; pos < active_nr; pos++) {
+		struct cache_entry *ce = active_cache[pos];
+		if (pathspec_match(pathspec, NULL, ce->name, 0)) {
+			checkout_entry(ce, &state, NULL);
+		}
+	}
+
+	if (write_cache(newfd, active_cache, active_nr) ||
+	    commit_locked_index(lock_file))
+		die("unable to write new index file");
+
+	resolve_ref("HEAD", rev, 0, &flag);
+	head = lookup_commit_reference_gently(rev, 1);
+
+	return post_checkout_hook(head, head, 0);
+}
+
+static void show_local_changes(struct object *head)
+{
+	struct rev_info rev;
+	/* I think we want full paths, even if we're in a subdirectory. */
+	init_revisions(&rev, NULL);
+	rev.abbrev = 0;
+	rev.diffopt.output_format |= DIFF_FORMAT_NAME_STATUS;
+	add_pending_object(&rev, head, NULL);
+	run_diff_index(&rev, 0);
+}
+
+static void describe_detached_head(char *msg, struct commit *commit)
+{
+	struct strbuf sb;
+	strbuf_init(&sb, 0);
+	parse_commit(commit);
+	pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, 0, "", "", 0, 0);
+	fprintf(stderr, "%s %s... %s\n", msg,
+		find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf);
+	strbuf_release(&sb);
+}
+
+static int reset_to_new(struct tree *tree, int quiet)
+{
+	struct unpack_trees_options opts;
+	struct tree_desc tree_desc;
+
+	memset(&opts, 0, sizeof(opts));
+	opts.head_idx = -1;
+	opts.update = 1;
+	opts.reset = 1;
+	opts.merge = 1;
+	opts.fn = oneway_merge;
+	opts.verbose_update = !quiet;
+	opts.src_index = &the_index;
+	opts.dst_index = &the_index;
+	parse_tree(tree);
+	init_tree_desc(&tree_desc, tree->buffer, tree->size);
+	if (unpack_trees(1, &tree_desc, &opts))
+		return 128;
+	return 0;
+}
+
+static void reset_clean_to_new(struct tree *tree, int quiet)
+{
+	struct unpack_trees_options opts;
+	struct tree_desc tree_desc;
+
+	memset(&opts, 0, sizeof(opts));
+	opts.head_idx = -1;
+	opts.skip_unmerged = 1;
+	opts.reset = 1;
+	opts.merge = 1;
+	opts.fn = oneway_merge;
+	opts.verbose_update = !quiet;
+	opts.src_index = &the_index;
+	opts.dst_index = &the_index;
+	parse_tree(tree);
+	init_tree_desc(&tree_desc, tree->buffer, tree->size);
+	if (unpack_trees(1, &tree_desc, &opts))
+		exit(128);
+}
+
+struct checkout_opts {
+	int quiet;
+	int merge;
+	int force;
+
+	char *new_branch;
+	int new_branch_log;
+	enum branch_track track;
+};
+
+struct branch_info {
+	const char *name; /* The short name used */
+	const char *path; /* The full name of a real branch */
+	struct commit *commit; /* The named commit */
+};
+
+static void setup_branch_path(struct branch_info *branch)
+{
+	struct strbuf buf;
+	strbuf_init(&buf, 0);
+	strbuf_addstr(&buf, "refs/heads/");
+	strbuf_addstr(&buf, branch->name);
+	branch->path = strbuf_detach(&buf, NULL);
+}
+
+static int merge_working_tree(struct checkout_opts *opts,
+			      struct branch_info *old, struct branch_info *new)
+{
+	int ret;
+	struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+	int newfd = hold_locked_index(lock_file, 1);
+	read_cache();
+
+	if (opts->force) {
+		ret = reset_to_new(new->commit->tree, opts->quiet);
+		if (ret)
+			return ret;
+	} else {
+		struct tree_desc trees[2];
+		struct tree *tree;
+		struct unpack_trees_options topts;
+
+		memset(&topts, 0, sizeof(topts));
+		topts.head_idx = -1;
+		topts.src_index = &the_index;
+		topts.dst_index = &the_index;
+
+		refresh_cache(REFRESH_QUIET);
+
+		if (unmerged_cache()) {
+			error("you need to resolve your current index first");
+			return 1;
+		}
+
+		/* 2-way merge to the new branch */
+		topts.update = 1;
+		topts.merge = 1;
+		topts.gently = opts->merge;
+		topts.verbose_update = !opts->quiet;
+		topts.fn = twoway_merge;
+		topts.dir = xcalloc(1, sizeof(*topts.dir));
+		topts.dir->show_ignored = 1;
+		topts.dir->exclude_per_dir = ".gitignore";
+		tree = parse_tree_indirect(old->commit->object.sha1);
+		init_tree_desc(&trees[0], tree->buffer, tree->size);
+		tree = parse_tree_indirect(new->commit->object.sha1);
+		init_tree_desc(&trees[1], tree->buffer, tree->size);
+
+		if (unpack_trees(2, trees, &topts)) {
+			/*
+			 * Unpack couldn't do a trivial merge; either
+			 * give up or do a real merge, depending on
+			 * whether the merge flag was used.
+			 */
+			struct tree *result;
+			struct tree *work;
+			if (!opts->merge)
+				return 1;
+			parse_commit(old->commit);
+
+			/* Do more real merge */
+
+			/*
+			 * We update the index fully, then write the
+			 * tree from the index, then merge the new
+			 * branch with the current tree, with the old
+			 * branch as the base. Then we reset the index
+			 * (but not the working tree) to the new
+			 * branch, leaving the working tree as the
+			 * merged version, but skipping unmerged
+			 * entries in the index.
+			 */
+
+			add_files_to_cache(0, NULL, NULL);
+			work = write_tree_from_memory();
+
+			ret = reset_to_new(new->commit->tree, opts->quiet);
+			if (ret)
+				return ret;
+			merge_trees(new->commit->tree, work, old->commit->tree,
+				    new->name, "local", &result);
+			reset_clean_to_new(new->commit->tree, opts->quiet);
+		}
+	}
+
+	if (write_cache(newfd, active_cache, active_nr) ||
+	    commit_locked_index(lock_file))
+		die("unable to write new index file");
+
+	if (!opts->force)
+		show_local_changes(&new->commit->object);
+
+	return 0;
+}
+
+static void report_tracking(struct branch_info *new, struct checkout_opts *opts)
+{
+	/*
+	 * We have switched to a new branch; is it building on
+	 * top of another branch, and if so does that other branch
+	 * have changes we do not have yet?
+	 */
+	char *base;
+	unsigned char sha1[20];
+	struct commit *ours, *theirs;
+	char symmetric[84];
+	struct rev_info revs;
+	const char *rev_argv[10];
+	int rev_argc;
+	int num_ours, num_theirs;
+	const char *remote_msg;
+	struct branch *branch = branch_get(new->name);
+
+	/*
+	 * Nothing to report unless we are marked to build on top of
+	 * somebody else.
+	 */
+	if (!branch || !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
+		return;
+
+	/*
+	 * If what we used to build on no longer exists, there is
+	 * nothing to report.
+	 */
+	base = branch->merge[0]->dst;
+	if (!resolve_ref(base, sha1, 1, NULL))
+		return;
+
+	theirs = lookup_commit(sha1);
+	ours = new->commit;
+	if (!hashcmp(sha1, ours->object.sha1))
+		return; /* we are the same */
+
+	/* Run "rev-list --left-right ours...theirs" internally... */
+	rev_argc = 0;
+	rev_argv[rev_argc++] = NULL;
+	rev_argv[rev_argc++] = "--left-right";
+	rev_argv[rev_argc++] = symmetric;
+	rev_argv[rev_argc++] = "--";
+	rev_argv[rev_argc] = NULL;
+
+	strcpy(symmetric, sha1_to_hex(ours->object.sha1));
+	strcpy(symmetric + 40, "...");
+	strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
+
+	init_revisions(&revs, NULL);
+	setup_revisions(rev_argc, rev_argv, &revs, NULL);
+	prepare_revision_walk(&revs);
+
+	/* ... and count the commits on each side. */
+	num_ours = 0;
+	num_theirs = 0;
+	while (1) {
+		struct commit *c = get_revision(&revs);
+		if (!c)
+			break;
+		if (c->object.flags & SYMMETRIC_LEFT)
+			num_ours++;
+		else
+			num_theirs++;
+	}
+
+	if (!prefixcmp(base, "refs/remotes/")) {
+		remote_msg = " remote";
+		base += strlen("refs/remotes/");
+	} else {
+		remote_msg = "";
+	}
+
+	if (!num_theirs)
+		printf("Your branch is ahead of the tracked%s branch '%s' "
+		       "by %d commit%s.\n",
+		       remote_msg, base,
+		       num_ours, (num_ours == 1) ? "" : "s");
+	else if (!num_ours)
+		printf("Your branch is behind the tracked%s branch '%s' "
+		       "by %d commit%s,\n"
+		       "and can be fast-forwarded.\n",
+		       remote_msg, base,
+		       num_theirs, (num_theirs == 1) ? "" : "s");
+	else
+		printf("Your branch and the tracked%s branch '%s' "
+		       "have diverged,\nand respectively "
+		       "have %d and %d different commit(s) each.\n",
+		       remote_msg, base,
+		       num_ours, num_theirs);
+}
+
+static void update_refs_for_switch(struct checkout_opts *opts,
+				   struct branch_info *old,
+				   struct branch_info *new)
+{
+	struct strbuf msg;
+	const char *old_desc;
+	if (opts->new_branch) {
+		create_branch(old->name, opts->new_branch, new->name, 0,
+			      opts->new_branch_log, opts->track);
+		new->name = opts->new_branch;
+		setup_branch_path(new);
+	}
+
+	strbuf_init(&msg, 0);
+	old_desc = old->name;
+	if (!old_desc)
+		old_desc = sha1_to_hex(old->commit->object.sha1);
+	strbuf_addf(&msg, "checkout: moving from %s to %s",
+		    old_desc, new->name);
+
+	if (new->path) {
+		create_symref("HEAD", new->path, msg.buf);
+		if (!opts->quiet) {
+			if (old->path && !strcmp(new->path, old->path))
+				fprintf(stderr, "Already on \"%s\"\n",
+					new->name);
+			else
+				fprintf(stderr, "Switched to%s branch \"%s\"\n",
+					opts->new_branch ? " a new" : "",
+					new->name);
+		}
+	} else if (strcmp(new->name, "HEAD")) {
+		update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL,
+			   REF_NODEREF, DIE_ON_ERR);
+		if (!opts->quiet) {
+			if (old->path)
+				fprintf(stderr, "Note: moving to \"%s\" which isn't a local branch\nIf you want to create a new branch from this checkout, you may do so\n(now or later) by using -b with the checkout command again. Example:\n  git checkout -b <new_branch_name>\n", new->name);
+			describe_detached_head("HEAD is now at", new->commit);
+		}
+	}
+	remove_branch_state();
+	strbuf_release(&msg);
+	if (!opts->quiet && (new->path || !strcmp(new->name, "HEAD")))
+		report_tracking(new, opts);
+}
+
+static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
+{
+	int ret = 0;
+	struct branch_info old;
+	unsigned char rev[20];
+	int flag;
+	memset(&old, 0, sizeof(old));
+	old.path = resolve_ref("HEAD", rev, 0, &flag);
+	old.commit = lookup_commit_reference_gently(rev, 1);
+	if (!(flag & REF_ISSYMREF))
+		old.path = NULL;
+
+	if (old.path && !prefixcmp(old.path, "refs/heads/"))
+		old.name = old.path + strlen("refs/heads/");
+
+	if (!new->name) {
+		new->name = "HEAD";
+		new->commit = old.commit;
+		if (!new->commit)
+			die("You are on a branch yet to be born");
+		parse_commit(new->commit);
+	}
+
+	/*
+	 * If the new thing isn't a branch and isn't HEAD and we're
+	 * not starting a new branch, and we want messages, and we
+	 * weren't on a branch, and we're moving to a new commit,
+	 * describe the old commit.
+	 */
+	if (!new->path && strcmp(new->name, "HEAD") && !opts->new_branch &&
+	    !opts->quiet && !old.path && new->commit != old.commit)
+		describe_detached_head("Previous HEAD position was", old.commit);
+
+	if (!old.commit) {
+		if (!opts->quiet) {
+			fprintf(stderr, "warning: You appear to be on a branch yet to be born.\n");
+			fprintf(stderr, "warning: Forcing checkout of %s.\n", new->name);
+		}
+		opts->force = 1;
+	}
+
+	ret = merge_working_tree(opts, &old, new);
+	if (ret)
+		return ret;
+
+	update_refs_for_switch(opts, &old, new);
+
+	return post_checkout_hook(old.commit, new->commit, 1);
+}
+
+int cmd_checkout(int argc, const char **argv, const char *prefix)
+{
+	struct checkout_opts opts;
+	unsigned char rev[20];
+	const char *arg;
+	struct branch_info new;
+	struct tree *source_tree = NULL;
+	struct option options[] = {
+		OPT__QUIET(&opts.quiet),
+		OPT_STRING('b', NULL, &opts.new_branch, "new branch", "branch"),
+		OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "log for new branch"),
+		OPT_SET_INT( 0 , "track",  &opts.track, "track",
+			BRANCH_TRACK_EXPLICIT),
+		OPT_BOOLEAN('f', NULL, &opts.force, "force"),
+		OPT_BOOLEAN('m', NULL, &opts.merge, "merge"),
+		OPT_END(),
+	};
+
+	memset(&opts, 0, sizeof(opts));
+	memset(&new, 0, sizeof(new));
+
+	git_config(git_default_config);
+
+	opts.track = git_branch_track;
+
+	argc = parse_options(argc, argv, options, checkout_usage, 0);
+	if (argc) {
+		arg = argv[0];
+		if (get_sha1(arg, rev))
+			;
+		else if ((new.commit = lookup_commit_reference_gently(rev, 1))) {
+			new.name = arg;
+			setup_branch_path(&new);
+			if (resolve_ref(new.path, rev, 1, NULL))
+				new.commit = lookup_commit_reference(rev);
+			else
+				new.path = NULL;
+			parse_commit(new.commit);
+			source_tree = new.commit->tree;
+			argv++;
+			argc--;
+		} else if ((source_tree = parse_tree_indirect(rev))) {
+			argv++;
+			argc--;
+		}
+	}
+
+	if (argc && !strcmp(argv[0], "--")) {
+		argv++;
+		argc--;
+	}
+
+	if (!opts.new_branch && (opts.track != git_branch_track))
+		die("git checkout: --track and --no-track require -b");
+
+	if (opts.force && opts.merge)
+		die("git checkout: -f and -m are incompatible");
+
+	if (argc) {
+		const char **pathspec = get_pathspec(prefix, argv);
+
+		if (!pathspec)
+			die("invalid path specification");
+
+		/* Checkout paths */
+		if (opts.new_branch || opts.force || opts.merge) {
+			if (argc == 1) {
+				die("git checkout: updating paths is incompatible with switching branches/forcing\nDid you intend to checkout '%s' which can not be resolved as commit?", argv[0]);
+			} else {
+				die("git checkout: updating paths is incompatible with switching branches/forcing");
+			}
+		}
+
+		return checkout_paths(source_tree, pathspec);
+	}
+
+	if (new.name && !new.commit) {
+		die("Cannot switch branch to a non-commit.");
+	}
+
+	return switch_branches(&opts, &new);
+}

builtin-clean.c

@@ -10,6 +10,7 @@
 #include "cache.h"
 #include "dir.h"
 #include "parse-options.h"
+#include "quote.h"
 
 static int force = -1; /* unset */
 
@@ -34,7 +35,8 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	struct dir_struct dir;
 	const char *path, *base;
 	static const char **pathspec;
-	int prefix_offset = 0;
+	struct strbuf buf;
+	const char *qname;
 	char *seen = NULL;
 	struct option options[] = {
 		OPT__QUIET(&quiet),
@@ -56,6 +58,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, options, builtin_clean_usage, 0);
 
+	strbuf_init(&buf, 0);
 	memset(&dir, 0, sizeof(dir));
 	if (ignored_only)
 		dir.show_ignored = 1;
@@ -72,8 +75,6 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	if (!ignored)
 		setup_standard_excludes(&dir);
 
-	if (prefix)
-		prefix_offset = strlen(prefix);
 	pathspec = get_pathspec(prefix, argv);
 	read_cache();
 
@@ -134,39 +135,34 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 
 		if (S_ISDIR(st.st_mode)) {
 			strbuf_addstr(&directory, ent->name);
+			qname = quote_path_relative(directory.buf, directory.len, &buf, prefix);
 			if (show_only && (remove_directories || matches)) {
-				printf("Would remove %s\n",
-				       directory.buf + prefix_offset);
+				printf("Would remove %s\n", qname);
 			} else if (remove_directories || matches) {
 				if (!quiet)
-					printf("Removing %s\n",
-					       directory.buf + prefix_offset);
+					printf("Removing %s\n", qname);
 				if (remove_dir_recursively(&directory, 0) != 0) {
-					warning("failed to remove '%s'",
-						directory.buf + prefix_offset);
+					warning("failed to remove '%s'", qname);
 					errors++;
 				}
 			} else if (show_only) {
-				printf("Would not remove %s\n",
-				       directory.buf + prefix_offset);
+				printf("Would not remove %s\n", qname);
 			} else {
-				printf("Not removing %s\n",
-				       directory.buf + prefix_offset);
+				printf("Not removing %s\n", qname);
 			}
 			strbuf_reset(&directory);
 		} else {
 			if (pathspec && !matches)
 				continue;
+			qname = quote_path_relative(ent->name, -1, &buf, prefix);
 			if (show_only) {
-				printf("Would remove %s\n",
-				       ent->name + prefix_offset);
+				printf("Would remove %s\n", qname);
 				continue;
 			} else if (!quiet) {
-				printf("Removing %s\n",
-				       ent->name + prefix_offset);
+				printf("Removing %s\n", qname);
 			}
 			if (unlink(ent->name) != 0) {
-				warning("failed to remove '%s'", ent->name);
+				warning("failed to remove '%s'", qname);
 				errors++;
 			}
 		}

builtin-commit.c

@@ -198,6 +198,8 @@ static void create_base_index(void)
 	opts.head_idx = 1;
 	opts.index_only = 1;
 	opts.merge = 1;
+	opts.src_index = &the_index;
+	opts.dst_index = &the_index;
 
 	opts.fn = oneway_merge;
 	tree = parse_tree_indirect(head_sha1);
@@ -205,7 +207,8 @@ static void create_base_index(void)
 		die("failed to unpack HEAD tree object");
 	parse_tree(tree);
 	init_tree_desc(&t, tree->buffer, tree->size);
-	unpack_trees(1, &t, &opts);
+	if (unpack_trees(1, &t, &opts))
+		exit(128); /* We've already reported the error, finish dying */
 }
 
 static char *prepare_index(int argc, const char **argv, const char *prefix)

builtin-describe.c

@@ -17,12 +17,16 @@ static const char * const describe_usage[] = {
 static int debug;	/* Display lots of verbose info */
 static int all;	/* Default to annotated tags only */
 static int tags;	/* But allow any tags if --tags is specified */
+static int longformat;
 static int abbrev = DEFAULT_ABBREV;
 static int max_candidates = 10;
 const char *pattern = NULL;
+static int always;
 
 struct commit_name {
+	struct tag *tag;
 	int prio; /* annotated tag = 2, tag = 1, head = 0 */
+	unsigned char sha1[20];
 	char path[FLEX_ARRAY]; /* more */
 };
 static const char *prio_names[] = {
@@ -31,14 +35,17 @@ static const char *prio_names[] = {
 
 static void add_to_known_names(const char *path,
 			       struct commit *commit,
-			       int prio)
+			       int prio,
+			       const unsigned char *sha1)
 {
 	struct commit_name *e = commit->util;
 	if (!e || e->prio < prio) {
 		size_t len = strlen(path)+1;
 		free(e);
 		e = xmalloc(sizeof(struct commit_name) + len);
+		e->tag = NULL;
 		e->prio = prio;
+		hashcpy(e->sha1, sha1);
 		memcpy(e->path, path, len);
 		commit->util = e;
 	}
@@ -46,19 +53,34 @@ static void add_to_known_names(const char *path,
 
 static int get_name(const char *path, const unsigned char *sha1, int flag, void *cb_data)
 {
-	struct commit *commit = lookup_commit_reference_gently(sha1, 1);
+	int might_be_tag = !prefixcmp(path, "refs/tags/");
+	struct commit *commit;
 	struct object *object;
-	int prio;
+	unsigned char peeled[20];
+	int is_tag, prio;
 
-	if (!commit)
+	if (!all && !might_be_tag)
 		return 0;
-	object = parse_object(sha1);
+
+	if (!peel_ref(path, peeled) && !is_null_sha1(peeled)) {
+		commit = lookup_commit_reference_gently(peeled, 1);
+		if (!commit)
+			return 0;
+		is_tag = !!hashcmp(sha1, commit->object.sha1);
+	} else {
+		commit = lookup_commit_reference_gently(sha1, 1);
+		object = parse_object(sha1);
+		if (!commit || !object)
+			return 0;
+		is_tag = object->type == OBJ_TAG;
+	}
+
 	/* If --all, then any refs are used.
 	 * If --tags, then any tags are used.
 	 * Otherwise only annotated tags are used.
 	 */
-	if (!prefixcmp(path, "refs/tags/")) {
-		if (object->type == OBJ_TAG) {
+	if (might_be_tag) {
+		if (is_tag) {
 			prio = 2;
 			if (pattern && fnmatch(pattern, path + 10, 0))
 				prio = 0;
@@ -74,7 +96,7 @@ static int get_name(const char *path, const unsigned char *sha1, int flag, void
 		if (!tags && prio < 2)
 			return 0;
 	}
-	add_to_known_names(all ? path + 5 : path + 10, commit, prio);
+	add_to_known_names(all ? path + 5 : path + 10, commit, prio, sha1);
 	return 0;
 }
 
@@ -131,6 +153,27 @@ static unsigned long finish_depth_computation(
 	return seen_commits;
 }
 
+static void display_name(struct commit_name *n)
+{
+	if (n->prio == 2 && !n->tag) {
+		n->tag = lookup_tag(n->sha1);
+		if (!n->tag || parse_tag(n->tag) || !n->tag->tag)
+			die("annotated tag %s not available", n->path);
+		if (strcmp(n->tag->tag, n->path))
+			warning("tag '%s' is really '%s' here", n->tag->tag, n->path);
+	}
+
+	if (n->tag)
+		printf("%s", n->tag->tag);
+	else
+		printf("%s", n->path);
+}
+
+static void show_suffix(int depth, const unsigned char *sha1)
+{
+	printf("-%d-g%s", depth, find_unique_abbrev(sha1, abbrev));
+}
+
 static void describe(const char *arg, int last_one)
 {
 	unsigned char sha1[20];
@@ -155,10 +198,18 @@ static void describe(const char *arg, int last_one)
 
 	n = cmit->util;
 	if (n) {
-		printf("%s\n", n->path);
+		/*
+		 * Exact match to an existing ref.
+		 */
+		display_name(n);
+		if (longformat)
+			show_suffix(0, n->tag->tagged->sha1);
+		printf("\n");
 		return;
 	}
 
+	if (!max_candidates)
+		die("no tag exactly matches '%s'", sha1_to_hex(cmit->object.sha1));
 	if (debug)
 		fprintf(stderr, "searching to describe %s\n", arg);
 
@@ -207,8 +258,14 @@ static void describe(const char *arg, int last_one)
 		}
 	}
 
-	if (!match_cnt)
-		die("cannot describe '%s'", sha1_to_hex(cmit->object.sha1));
+	if (!match_cnt) {
+		const unsigned char *sha1 = cmit->object.sha1;
+		if (always) {
+			printf("%s\n", find_unique_abbrev(sha1, abbrev));
+			return;
+		}
+		die("cannot describe '%s'", sha1_to_hex(sha1));
+	}
 
 	qsort(all_matches, match_cnt, sizeof(all_matches[0]), compare_pt);
 
@@ -235,12 +292,11 @@ static void describe(const char *arg, int last_one)
 				sha1_to_hex(gave_up_on->object.sha1));
 		}
 	}
-	if (abbrev == 0)
-		printf("%s\n", all_matches[0].name->path );
-	else
-		printf("%s-%d-g%s\n", all_matches[0].name->path,
-		       all_matches[0].depth,
-		       find_unique_abbrev(cmit->object.sha1, abbrev));
+
+	display_name(all_matches[0].name);
+	if (abbrev)
+		show_suffix(all_matches[0].depth, cmit->object.sha1);
+	printf("\n");
 
 	if (!last_one)
 		clear_commit_marks(cmit, -1);
@@ -254,28 +310,38 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
 		OPT_BOOLEAN(0, "debug",      &debug, "debug search strategy on stderr"),
 		OPT_BOOLEAN(0, "all",        &all, "use any ref in .git/refs"),
 		OPT_BOOLEAN(0, "tags",       &tags, "use any tag in .git/refs/tags"),
+		OPT_BOOLEAN(0, "long",       &longformat, "always use long format"),
 		OPT__ABBREV(&abbrev),
+		OPT_SET_INT(0, "exact-match", &max_candidates,
+			    "only output exact matches", 0),
 		OPT_INTEGER(0, "candidates", &max_candidates,
 			    "consider <n> most recent tags (default: 10)"),
 		OPT_STRING(0, "match",       &pattern, "pattern",
 			   "only consider tags matching <pattern>"),
+		OPT_BOOLEAN(0, "always",     &always,
+			   "show abbreviated commit object as fallback"),
 		OPT_END(),
 	};
 
 	argc = parse_options(argc, argv, options, describe_usage, 0);
-	if (max_candidates < 1)
-		max_candidates = 1;
+	if (max_candidates < 0)
+		max_candidates = 0;
 	else if (max_candidates > MAX_TAGS)
 		max_candidates = MAX_TAGS;
 
 	save_commit_buffer = 0;
 
+	if (longformat && abbrev == 0)
+		die("--long is incompatible with --abbrev=0");
+
 	if (contains) {
-		const char **args = xmalloc((6 + argc) * sizeof(char*));
+		const char **args = xmalloc((7 + argc) * sizeof(char*));
 		int i = 0;
 		args[i++] = "name-rev";
 		args[i++] = "--name-only";
 		args[i++] = "--no-undefined";
+		if (always)
+			args[i++] = "--always";
 		if (!all) {
 			args[i++] = "--tags";
 			if (pattern) {

builtin-diff.c

@@ -44,12 +44,17 @@ static void stuff_change(struct diff_options *opt,
 		tmp_u = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_u;
 		tmp_c = old_name; old_name = new_name; new_name = tmp_c;
 	}
+
+	if (opt->prefix &&
+	    (strncmp(old_name, opt->prefix, opt->prefix_length) ||
+	     strncmp(new_name, opt->prefix, opt->prefix_length)))
+		return;
+
 	one = alloc_filespec(old_name);
 	two = alloc_filespec(new_name);
 	fill_filespec(one, old_sha1, old_mode);
 	fill_filespec(two, new_sha1, new_mode);
 
-	/* NEEDSWORK: shouldn't this part of diffopt??? */
 	diff_queue(&diff_queued_diff, one, two);
 }
 
@@ -246,6 +251,10 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 		if (diff_setup_done(&rev.diffopt) < 0)
 			die("diff_setup_done failed");
 	}
+	if (rev.diffopt.prefix && nongit) {
+		rev.diffopt.prefix = NULL;
+		rev.diffopt.prefix_length = 0;
+	}
 	DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
 	DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 

builtin-fast-export.c

@@ -123,7 +123,7 @@ static void show_filemodify(struct diff_queue_struct *q,
 			printf("D %s\n", spec->path);
 		else {
 			struct object *object = lookup_object(spec->sha1);
-			printf("M 0%06o :%d %s\n", spec->mode,
+			printf("M %06o :%d %s\n", spec->mode,
 			       get_object_mark(object), spec->path);
 		}
 	}
@@ -196,8 +196,7 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
 			  ? strlen(reencoded) : message
 			  ? strlen(message) : 0),
 	       reencoded ? reencoded : message ? message : "");
-	if (reencoded)
-		free(reencoded);
+	free(reencoded);
 
 	for (i = 0, p = commit->parents; p; p = p->next) {
 		int mark = get_object_mark(&p->item->object);

builtin-fetch-pack.c

@@ -18,7 +18,7 @@ static struct fetch_pack_args args = {
 };
 
 static const char fetch_pack_usage[] =
-"git-fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
+"git-fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
 
 #define COMPLETE	(1U << 0)
 #define COMMON		(1U << 1)
@@ -41,7 +41,8 @@ static void rev_list_push(struct commit *commit, int mark)
 		commit->object.flags |= mark;
 
 		if (!(commit->object.parsed))
-			parse_commit(commit);
+			if (parse_commit(commit))
+				return;
 
 		insert_by_date(commit, &rev_list);
 
@@ -83,7 +84,8 @@ static void mark_common(struct commit *commit,
 			if (!ancestors_only && !(o->flags & POPPED))
 				non_common_revs--;
 			if (!o->parsed && !dont_parse)
-				parse_commit(commit);
+				if (parse_commit(commit))
+					return;
 
 			for (parents = commit->parents;
 					parents;
@@ -103,20 +105,20 @@ static const unsigned char* get_rev(void)
 
 	while (commit == NULL) {
 		unsigned int mark;
-		struct commit_list* parents;
+		struct commit_list *parents = NULL;
 
 		if (rev_list == NULL || non_common_revs == 0)
 			return NULL;
 
 		commit = rev_list->item;
 		if (!(commit->object.parsed))
-			parse_commit(commit);
+			if (!parse_commit(commit))
+				parents = commit->parents;
+
 		commit->object.flags |= POPPED;
 		if (!(commit->object.flags & COMMON))
 			non_common_revs--;
 
-		parents = commit->parents;
-
 		if (commit->object.flags & COMMON) {
 			/* do not send "have", and ignore ancestors */
 			commit = NULL;
@@ -174,13 +176,14 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 		}
 
 		if (!fetching)
-			packet_write(fd[1], "want %s%s%s%s%s%s%s\n",
+			packet_write(fd[1], "want %s%s%s%s%s%s%s%s\n",
 				     sha1_to_hex(remote),
 				     (multi_ack ? " multi_ack" : ""),
 				     (use_sideband == 2 ? " side-band-64k" : ""),
 				     (use_sideband == 1 ? " side-band" : ""),
 				     (args.use_thin_pack ? " thin-pack" : ""),
 				     (args.no_progress ? " no-progress" : ""),
+				     (args.include_tag ? " include-tag" : ""),
 				     " ofs-delta");
 		else
 			packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
@@ -212,7 +215,8 @@ static int find_common(int fd[2], unsigned char *result_sha1,
 				if (!lookup_object(sha1))
 					die("object not found: %s", line);
 				/* make sure that it is parsed as shallow */
-				parse_object(sha1);
+				if (!parse_object(sha1))
+					die("error in object: %s", line);
 				if (unregister_shallow(sha1))
 					die("no shallow found: %s", line);
 				continue;
@@ -387,7 +391,6 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
 	int retval;
 	unsigned long cutoff = 0;
 
-	track_object_refs = 0;
 	save_commit_buffer = 0;
 
 	for (ref = *refs; ref; ref = ref->next) {
@@ -539,8 +542,10 @@ static int get_pack(int xd[2], char **pack_lockfile)
 	cmd.git_cmd = 1;
 	if (start_command(&cmd))
 		die("fetch-pack: unable to fork off %s", argv[0]);
-	if (do_keep && pack_lockfile)
+	if (do_keep && pack_lockfile) {
 		*pack_lockfile = index_pack_lockfile(cmd.out);
+		close(cmd.out);
+	}
 
 	if (finish_command(&cmd))
 		die("%s failed", argv[0]);
@@ -680,6 +685,10 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 				args.use_thin_pack = 1;
 				continue;
 			}
+			if (!strcmp("--include-tag", arg)) {
+				args.include_tag = 1;
+				continue;
+			}
 			if (!strcmp("--all", arg)) {
 				args.fetch_all = 1;
 				continue;

builtin-fetch.c

@@ -40,6 +40,8 @@ static struct option builtin_fetch_options[] = {
 		    "force overwrite of local branch"),
 	OPT_SET_INT('t', "tags", &tags,
 		    "fetch all tags and associated objects", TAGS_SET),
+	OPT_SET_INT('n', NULL, &tags,
+		    "do not fetch all tags (--no-tags)", TAGS_UNSET),
 	OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
 	OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
 		    "allow updating of HEAD ref"),
@@ -101,6 +103,10 @@ static void add_merge_config(struct ref **head,
 	}
 }
 
+static void find_non_local_tags(struct transport *transport,
+			struct ref **head,
+			struct ref ***tail);
+
 static struct ref *get_ref_map(struct transport *transport,
 			       struct refspec *refs, int ref_count, int tags,
 			       int *autotags)
@@ -157,8 +163,11 @@ static struct ref *get_ref_map(struct transport *transport,
 			if (!ref_map)
 				die("Couldn't find remote ref HEAD");
 			ref_map->merge = 1;
+			tail = &ref_map->next;
 		}
 	}
+	if (tags == TAGS_DEFAULT && *autotags)
+		find_non_local_tags(transport, &ref_map, &tail);
 	ref_remove_duplicates(ref_map);
 
 	return ref_map;
@@ -452,18 +461,28 @@ static int add_existing(const char *refname, const unsigned char *sha1,
 	return 0;
 }
 
-static struct ref *find_non_local_tags(struct transport *transport,
-				       struct ref *fetch_map)
+static int will_fetch(struct ref **head, const unsigned char *sha1)
 {
-	static struct path_list existing_refs = { NULL, 0, 0, 0 };
+	struct ref *rm = *head;
+	while (rm) {
+		if (!hashcmp(rm->old_sha1, sha1))
+			return 1;
+		rm = rm->next;
+	}
+	return 0;
+}
+
+static void find_non_local_tags(struct transport *transport,
+			struct ref **head,
+			struct ref ***tail)
+{
+	struct path_list existing_refs = { NULL, 0, 0, 0 };
 	struct path_list new_refs = { NULL, 0, 0, 1 };
 	char *ref_name;
 	int ref_name_len;
 	const unsigned char *ref_sha1;
 	const struct ref *tag_ref;
 	struct ref *rm = NULL;
-	struct ref *ref_map = NULL;
-	struct ref **tail = &ref_map;
 	const struct ref *ref;
 
 	for_each_ref(add_existing, &existing_refs);
@@ -489,7 +508,8 @@ static struct ref *find_non_local_tags(struct transport *transport,
 
 		if (!path_list_has_path(&existing_refs, ref_name) &&
 		    !path_list_has_path(&new_refs, ref_name) &&
-		    has_sha1_file(ref->old_sha1)) {
+		    (has_sha1_file(ref->old_sha1) ||
+		     will_fetch(head, ref->old_sha1))) {
 			path_list_insert(ref_name, &new_refs);
 
 			rm = alloc_ref(strlen(ref_name) + 1);
@@ -498,19 +518,19 @@ static struct ref *find_non_local_tags(struct transport *transport,
 			strcpy(rm->peer_ref->name, ref_name);
 			hashcpy(rm->old_sha1, ref_sha1);
 
-			*tail = rm;
-			tail = &rm->next;
+			**tail = rm;
+			*tail = &rm->next;
 		}
 		free(ref_name);
 	}
-
-	return ref_map;
+	path_list_clear(&existing_refs, 0);
+	path_list_clear(&new_refs, 0);
 }
 
 static int do_fetch(struct transport *transport,
 		    struct refspec *refs, int ref_count)
 {
-	struct ref *ref_map, *fetch_map;
+	struct ref *ref_map;
 	struct ref *rm;
 	int autotags = (transport->remote->fetch_tags == 1);
 	if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
@@ -537,26 +557,28 @@ static int do_fetch(struct transport *transport,
 			read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
 	}
 
+	if (tags == TAGS_DEFAULT && autotags)
+		transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
 	if (fetch_refs(transport, ref_map)) {
 		free_refs(ref_map);
 		return 1;
 	}
-
-	fetch_map = ref_map;
+	free_refs(ref_map);
 
 	/* if neither --no-tags nor --tags was specified, do automated tag
 	 * following ... */
 	if (tags == TAGS_DEFAULT && autotags) {
-		ref_map = find_non_local_tags(transport, fetch_map);
+		struct ref **tail = &ref_map;
+		ref_map = NULL;
+		find_non_local_tags(transport, &ref_map, &tail);
 		if (ref_map) {
+			transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
 			transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 			fetch_refs(transport, ref_map);
 		}
 		free_refs(ref_map);
 	}
 
-	free_refs(fetch_map);
-
 	transport_disconnect(transport);
 
 	return 0;

builtin-for-each-ref.c

@@ -165,7 +165,7 @@ static int verify_format(const char *format)
 	for (cp = format; *cp && (sp = find_next(cp)); ) {
 		const char *ep = strchr(sp, ')');
 		if (!ep)
-			return error("malformatted format string %s", sp);
+			return error("malformed format string %s", sp);
 		/* sp points at "%(" and ep points at the closing ")" */
 		parse_atom(sp + 2, ep);
 		cp = ep + 1;

builtin-fsck.c

@@ -8,6 +8,7 @@
 #include "pack.h"
 #include "cache-tree.h"
 #include "tree-walk.h"
+#include "fsck.h"
 #include "parse-options.h"
 
 #define REACHABLE 0x0001
@@ -54,13 +55,75 @@ static int objerror(struct object *obj, const char *err, ...)
 	return -1;
 }
 
-static int objwarning(struct object *obj, const char *err, ...)
+static int fsck_error_func(struct object *obj, int type, const char *err, ...)
 {
 	va_list params;
 	va_start(params, err);
-	objreport(obj, "warning", err, params);
+	objreport(obj, (type == FSCK_WARN) ? "warning" : "error", err, params);
 	va_end(params);
-	return -1;
+	return (type == FSCK_WARN) ? 0 : 1;
+}
+
+static int mark_object(struct object *obj, int type, void *data)
+{
+	struct tree *tree = NULL;
+	struct object *parent = data;
+	int result;
+
+	if (!obj) {
+		printf("broken link from %7s %s\n",
+			   typename(parent->type), sha1_to_hex(parent->sha1));
+		printf("broken link from %7s %s\n",
+			   (type == OBJ_ANY ? "unknown" : typename(type)), "unknown");
+		errors_found |= ERROR_REACHABLE;
+		return 1;
+	}
+
+	if (type != OBJ_ANY && obj->type != type)
+		objerror(parent, "wrong object type in link");
+
+	if (obj->flags & REACHABLE)
+		return 0;
+	obj->flags |= REACHABLE;
+	if (!obj->parsed) {
+		if (parent && !has_sha1_file(obj->sha1)) {
+			printf("broken link from %7s %s\n",
+				 typename(parent->type), sha1_to_hex(parent->sha1));
+			printf("              to %7s %s\n",
+				 typename(obj->type), sha1_to_hex(obj->sha1));
+			errors_found |= ERROR_REACHABLE;
+		}
+		return 1;
+	}
+
+	if (obj->type == OBJ_TREE) {
+		obj->parsed = 0;
+		tree = (struct tree *)obj;
+		if (parse_tree(tree) < 0)
+			return 1; /* error already displayed */
+	}
+	result = fsck_walk(obj, mark_object, obj);
+	if (tree) {
+		free(tree->buffer);
+		tree->buffer = NULL;
+	}
+	if (result < 0)
+		result = 1;
+
+	return result;
+}
+
+static void mark_object_reachable(struct object *obj)
+{
+	mark_object(obj, OBJ_ANY, 0);
+}
+
+static int mark_used(struct object *obj, int type, void *data)
+{
+	if (!obj)
+		return 1;
+	obj->used = 1;
+	return 0;
 }
 
 /*
@@ -68,8 +131,6 @@ static int objwarning(struct object *obj, const char *err, ...)
  */
 static void check_reachable_object(struct object *obj)
 {
-	const struct object_refs *refs;
-
 	/*
 	 * We obviously want the object to be parsed,
 	 * except if it was in a pack-file and we didn't
@@ -82,25 +143,6 @@ static void check_reachable_object(struct object *obj)
 		errors_found |= ERROR_REACHABLE;
 		return;
 	}
-
-	/*
-	 * Check that everything that we try to reference is also good.
-	 */
-	refs = lookup_object_refs(obj);
-	if (refs) {
-		unsigned j;
-		for (j = 0; j < refs->count; j++) {
-			struct object *ref = refs->ref[j];
-			if (ref->parsed ||
-			    (has_sha1_file(ref->sha1)))
-				continue;
-			printf("broken link from %7s %s\n",
-			       typename(obj->type), sha1_to_hex(obj->sha1));
-			printf("              to %7s %s\n",
-			       typename(ref->type), sha1_to_hex(ref->sha1));
-			errors_found |= ERROR_REACHABLE;
-		}
-	}
 }
 
 /*
@@ -204,205 +246,6 @@ static void check_connectivity(void)
 	}
 }
 
-/*
- * The entries in a tree are ordered in the _path_ order,
- * which means that a directory entry is ordered by adding
- * a slash to the end of it.
- *
- * So a directory called "a" is ordered _after_ a file
- * called "a.c", because "a/" sorts after "a.c".
- */
-#define TREE_UNORDERED (-1)
-#define TREE_HAS_DUPS  (-2)
-
-static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
-{
-	int len1 = strlen(name1);
-	int len2 = strlen(name2);
-	int len = len1 < len2 ? len1 : len2;
-	unsigned char c1, c2;
-	int cmp;
-
-	cmp = memcmp(name1, name2, len);
-	if (cmp < 0)
-		return 0;
-	if (cmp > 0)
-		return TREE_UNORDERED;
-
-	/*
-	 * Ok, the first <len> characters are the same.
-	 * Now we need to order the next one, but turn
-	 * a '\0' into a '/' for a directory entry.
-	 */
-	c1 = name1[len];
-	c2 = name2[len];
-	if (!c1 && !c2)
-		/*
-		 * git-write-tree used to write out a nonsense tree that has
-		 * entries with the same name, one blob and one tree.  Make
-		 * sure we do not have duplicate entries.
-		 */
-		return TREE_HAS_DUPS;
-	if (!c1 && S_ISDIR(mode1))
-		c1 = '/';
-	if (!c2 && S_ISDIR(mode2))
-		c2 = '/';
-	return c1 < c2 ? 0 : TREE_UNORDERED;
-}
-
-static int fsck_tree(struct tree *item)
-{
-	int retval;
-	int has_full_path = 0;
-	int has_empty_name = 0;
-	int has_zero_pad = 0;
-	int has_bad_modes = 0;
-	int has_dup_entries = 0;
-	int not_properly_sorted = 0;
-	struct tree_desc desc;
-	unsigned o_mode;
-	const char *o_name;
-	const unsigned char *o_sha1;
-
-	if (verbose)
-		fprintf(stderr, "Checking tree %s\n",
-				sha1_to_hex(item->object.sha1));
-
-	init_tree_desc(&desc, item->buffer, item->size);
-
-	o_mode = 0;
-	o_name = NULL;
-	o_sha1 = NULL;
-	while (desc.size) {
-		unsigned mode;
-		const char *name;
-		const unsigned char *sha1;
-
-		sha1 = tree_entry_extract(&desc, &name, &mode);
-
-		if (strchr(name, '/'))
-			has_full_path = 1;
-		if (!*name)
-			has_empty_name = 1;
-		has_zero_pad |= *(char *)desc.buffer == '0';
-		update_tree_entry(&desc);
-
-		switch (mode) {
-		/*
-		 * Standard modes..
-		 */
-		case S_IFREG | 0755:
-		case S_IFREG | 0644:
-		case S_IFLNK:
-		case S_IFDIR:
-		case S_IFGITLINK:
-			break;
-		/*
-		 * This is nonstandard, but we had a few of these
-		 * early on when we honored the full set of mode
-		 * bits..
-		 */
-		case S_IFREG | 0664:
-			if (!check_strict)
-				break;
-		default:
-			has_bad_modes = 1;
-		}
-
-		if (o_name) {
-			switch (verify_ordered(o_mode, o_name, mode, name)) {
-			case TREE_UNORDERED:
-				not_properly_sorted = 1;
-				break;
-			case TREE_HAS_DUPS:
-				has_dup_entries = 1;
-				break;
-			default:
-				break;
-			}
-		}
-
-		o_mode = mode;
-		o_name = name;
-		o_sha1 = sha1;
-	}
-	free(item->buffer);
-	item->buffer = NULL;
-
-	retval = 0;
-	if (has_full_path) {
-		objwarning(&item->object, "contains full pathnames");
-	}
-	if (has_empty_name) {
-		objwarning(&item->object, "contains empty pathname");
-	}
-	if (has_zero_pad) {
-		objwarning(&item->object, "contains zero-padded file modes");
-	}
-	if (has_bad_modes) {
-		objwarning(&item->object, "contains bad file modes");
-	}
-	if (has_dup_entries) {
-		retval = objerror(&item->object, "contains duplicate file entries");
-	}
-	if (not_properly_sorted) {
-		retval = objerror(&item->object, "not properly sorted");
-	}
-	return retval;
-}
-
-static int fsck_commit(struct commit *commit)
-{
-	char *buffer = commit->buffer;
-	unsigned char tree_sha1[20], sha1[20];
-
-	if (verbose)
-		fprintf(stderr, "Checking commit %s\n",
-			sha1_to_hex(commit->object.sha1));
-
-	if (!commit->date)
-		return objerror(&commit->object, "invalid author/committer line");
-
-	if (memcmp(buffer, "tree ", 5))
-		return objerror(&commit->object, "invalid format - expected 'tree' line");
-	if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
-		return objerror(&commit->object, "invalid 'tree' line format - bad sha1");
-	buffer += 46;
-	while (!memcmp(buffer, "parent ", 7)) {
-		if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
-			return objerror(&commit->object, "invalid 'parent' line format - bad sha1");
-		buffer += 48;
-	}
-	if (memcmp(buffer, "author ", 7))
-		return objerror(&commit->object, "invalid format - expected 'author' line");
-	free(commit->buffer);
-	commit->buffer = NULL;
-	if (!commit->tree)
-		return objerror(&commit->object, "could not load commit's tree %s", tree_sha1);
-	if (!commit->parents && show_root)
-		printf("root %s\n", sha1_to_hex(commit->object.sha1));
-	return 0;
-}
-
-static int fsck_tag(struct tag *tag)
-{
-	struct object *tagged = tag->tagged;
-
-	if (verbose)
-		fprintf(stderr, "Checking tag %s\n",
-			sha1_to_hex(tag->object.sha1));
-
-	if (!tagged) {
-		return objerror(&tag->object, "could not load tagged object");
-	}
-	if (!show_tags)
-		return 0;
-
-	printf("tagged %s %s", typename(tagged->type), sha1_to_hex(tagged->sha1));
-	printf(" (%s) in %s\n", tag->tag, sha1_to_hex(tag->object.sha1));
-	return 0;
-}
-
 static int fsck_sha1(const unsigned char *sha1)
 {
 	struct object *obj = parse_object(sha1);
@@ -414,18 +257,43 @@ static int fsck_sha1(const unsigned char *sha1)
 	if (obj->flags & SEEN)
 		return 0;
 	obj->flags |= SEEN;
-	if (obj->type == OBJ_BLOB)
-		return 0;
-	if (obj->type == OBJ_TREE)
-		return fsck_tree((struct tree *) obj);
-	if (obj->type == OBJ_COMMIT)
-		return fsck_commit((struct commit *) obj);
-	if (obj->type == OBJ_TAG)
-		return fsck_tag((struct tag *) obj);
 
-	/* By now, parse_object() would've returned NULL instead. */
-	return objerror(obj, "unknown type '%d' (internal fsck error)",
-			obj->type);
+	if (verbose)
+		fprintf(stderr, "Checking %s %s\n",
+			typename(obj->type), sha1_to_hex(obj->sha1));
+
+	if (fsck_walk(obj, mark_used, 0))
+		objerror(obj, "broken links");
+	if (fsck_object(obj, check_strict, fsck_error_func))
+		return -1;
+
+	if (obj->type == OBJ_TREE) {
+		struct tree *item = (struct tree *) obj;
+
+		free(item->buffer);
+		item->buffer = NULL;
+	}
+
+	if (obj->type == OBJ_COMMIT) {
+		struct commit *commit = (struct commit *) obj;
+
+		free(commit->buffer);
+		commit->buffer = NULL;
+
+		if (!commit->parents && show_root)
+			printf("root %s\n", sha1_to_hex(commit->object.sha1));
+	}
+
+	if (obj->type == OBJ_TAG) {
+		struct tag *tag = (struct tag *) obj;
+
+		if (show_tags && tag->tagged) {
+			printf("tagged %s %s", typename(tag->tagged->type), sha1_to_hex(tag->tagged->sha1));
+			printf(" (%s) in %s\n", tag->tag, sha1_to_hex(tag->object.sha1));
+		}
+	}
+
+	return 0;
 }
 
 /*
@@ -538,13 +406,13 @@ static int fsck_handle_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 		obj = lookup_object(osha1);
 		if (obj) {
 			obj->used = 1;
-			mark_reachable(obj, REACHABLE);
+			mark_object_reachable(obj);
 		}
 	}
 	obj = lookup_object(nsha1);
 	if (obj) {
 		obj->used = 1;
-		mark_reachable(obj, REACHABLE);
+		mark_object_reachable(obj);
 	}
 	return 0;
 }
@@ -574,7 +442,7 @@ static int fsck_handle_ref(const char *refname, const unsigned char *sha1, int f
 		error("%s: not a commit", refname);
 	default_refs++;
 	obj->used = 1;
-	mark_reachable(obj, REACHABLE);
+	mark_object_reachable(obj);
 
 	return 0;
 }
@@ -660,7 +528,7 @@ static int fsck_cache_tree(struct cache_tree *it)
 			      sha1_to_hex(it->sha1));
 			return 1;
 		}
-		mark_reachable(obj, REACHABLE);
+		mark_object_reachable(obj);
 		obj->used = 1;
 		if (obj->type != OBJ_TREE)
 			err |= objerror(obj, "non-tree in cache-tree");
@@ -693,7 +561,6 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 {
 	int i, heads;
 
-	track_object_refs = 1;
 	errors_found = 0;
 
 	argc = parse_options(argc, argv, fsck_opts, fsck_usage, 0);
@@ -741,7 +608,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 				continue;
 
 			obj->used = 1;
-			mark_reachable(obj, REACHABLE);
+			mark_object_reachable(obj);
 			heads++;
 			continue;
 		}
@@ -773,7 +640,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 				continue;
 			obj = &blob->object;
 			obj->used = 1;
-			mark_reachable(obj, REACHABLE);
+			mark_object_reachable(obj);
 		}
 		if (active_cache_tree)
 			fsck_cache_tree(active_cache_tree);

builtin-gc.c

@@ -26,12 +26,13 @@ static int pack_refs = 1;
 static int aggressive_window = -1;
 static int gc_auto_threshold = 6700;
 static int gc_auto_pack_limit = 20;
+static char *prune_expire = "2.weeks.ago";
 
 #define MAX_ADD 10
 static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL};
 static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL};
 static const char *argv_repack[MAX_ADD] = {"repack", "-d", "-l", NULL};
-static const char *argv_prune[] = {"prune", NULL};
+static const char *argv_prune[] = {"prune", "--expire", NULL, NULL};
 static const char *argv_rerere[] = {"rerere", "gc", NULL};
 
 static int gc_config(const char *var, const char *value)
@@ -55,6 +56,17 @@ static int gc_config(const char *var, const char *value)
 		gc_auto_pack_limit = git_config_int(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "gc.pruneexpire")) {
+		if (!value)
+			return config_error_nonbool(var);
+		if (strcmp(value, "now")) {
+			unsigned long now = approxidate("now");
+			if (approxidate(value) >= now)
+				return error("Invalid %s: '%s'", var, value);
+		}
+		prune_expire = xstrdup(value);
+		return 0;
+	}
 	return git_default_config(var, value);
 }
 
@@ -172,12 +184,14 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	int prune = 0;
 	int aggressive = 0;
 	int auto_gc = 0;
+	int quiet = 0;
 	char buf[80];
 
 	struct option builtin_gc_options[] = {
 		OPT_BOOLEAN(0, "prune", &prune, "prune unreferenced objects"),
 		OPT_BOOLEAN(0, "aggressive", &aggressive, "be more thorough (increased runtime)"),
 		OPT_BOOLEAN(0, "auto", &auto_gc, "enable auto-gc mode"),
+		OPT_BOOLEAN('q', "quiet", &quiet, "suppress progress reports"),
 		OPT_END()
 	};
 
@@ -197,6 +211,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 			append_option(argv_repack, buf, MAX_ADD);
 		}
 	}
+	if (quiet)
+		append_option(argv_repack, "-q", MAX_ADD);
 
 	if (auto_gc) {
 		/*
@@ -230,7 +246,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	if (run_command_v_opt(argv_repack, RUN_GIT_CMD))
 		return error(FAILED_RUN, argv_repack[0]);
 
-	if (prune && run_command_v_opt(argv_prune, RUN_GIT_CMD))
+	argv_prune[2] = prune_expire;
+	if (run_command_v_opt(argv_prune, RUN_GIT_CMD))
 		return error(FAILED_RUN, argv_prune[0]);
 
 	if (run_command_v_opt(argv_rerere, RUN_GIT_CMD))

builtin-grep.c

@@ -12,6 +12,14 @@
 #include "builtin.h"
 #include "grep.h"
 
+#ifndef NO_EXTERNAL_GREP
+#ifdef __unix__
+#define NO_EXTERNAL_GREP 0
+#else
+#define NO_EXTERNAL_GREP 1
+#endif
+#endif
+
 /*
  * git grep pathspecs are somewhat different from diff-tree pathspecs;
  * pathname wildcards are allowed.
@@ -153,7 +161,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
 	return i;
 }
 
-#ifdef __unix__
+#if !NO_EXTERNAL_GREP
 static int exec_grep(int argc, const char **argv)
 {
 	pid_t pid;
@@ -372,7 +380,7 @@ static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
 	int nr;
 	read_cache();
 
-#ifdef __unix__
+#if !NO_EXTERNAL_GREP
 	/*
 	 * Use the external "grep" command for the case where
 	 * we grep through the checked-out files. It tends to

builtin-http-fetch.c

@@ -59,7 +59,7 @@ int cmd_http_fetch(int argc, const char **argv, const char *prefix)
 		url = rewritten_url;
 	}
 
-	walker = get_http_walker(url);
+	walker = get_http_walker(url, NULL);
 	walker->get_tree = get_tree;
 	walker->get_history = get_history;
 	walker->get_all = get_all;
@@ -80,8 +80,7 @@ int cmd_http_fetch(int argc, const char **argv, const char *prefix)
 
 	walker_free(walker);
 
-	if (rewritten_url)
-		free(rewritten_url);
+	free(rewritten_url);
 
 	return rc;
 }

builtin-init-db.c

@@ -29,27 +29,6 @@ static void safe_create_dir(const char *dir, int share)
 		die("Could not make %s writable by group\n", dir);
 }
 
-static int copy_file(const char *dst, const char *src, int mode)
-{
-	int fdi, fdo, status;
-
-	mode = (mode & 0111) ? 0777 : 0666;
-	if ((fdi = open(src, O_RDONLY)) < 0)
-		return fdi;
-	if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
-		close(fdi);
-		return fdo;
-	}
-	status = copy_fd(fdi, fdo);
-	if (close(fdo) != 0)
-		return error("%s: write error: %s", dst, strerror(errno));
-
-	if (!status && adjust_shared_perm(dst))
-		return -1;
-
-	return status;
-}
-
 static void copy_templates_1(char *path, int baselen,
 			     char *template, int template_baselen,
 			     DIR *dir)

builtin-log.c

@@ -15,9 +15,12 @@
 #include "reflog-walk.h"
 #include "patch-ids.h"
 #include "refs.h"
+#include "run-command.h"
+#include "shortlog.h"
 
 static int default_show_root = 1;
 static const char *fmt_patch_subject_prefix = "PATCH";
+static const char *fmt_pretty;
 
 static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
 {
@@ -52,6 +55,8 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix,
 
 	rev->abbrev = DEFAULT_ABBREV;
 	rev->commit_format = CMIT_FMT_DEFAULT;
+	if (fmt_pretty)
+		rev->commit_format = get_commit_format(fmt_pretty);
 	rev->verbose_header = 1;
 	DIFF_OPT_SET(&rev->diffopt, RECURSIVE);
 	rev->show_root_diff = default_show_root;
@@ -219,6 +224,8 @@ static int cmd_log_walk(struct rev_info *rev)
 
 static int git_log_config(const char *var, const char *value)
 {
+	if (!strcmp(var, "format.pretty"))
+		return git_config_string(&fmt_pretty, var, value);
 	if (!strcmp(var, "format.subjectprefix")) {
 		if (!value)
 			config_error_nonbool(var);
@@ -428,24 +435,47 @@ static int istitlechar(char c)
 		(c >= '0' && c <= '9') || c == '.' || c == '_';
 }
 
-static char *extra_headers = NULL;
-static int extra_headers_size = 0;
 static const char *fmt_patch_suffix = ".patch";
 static int numbered = 0;
 static int auto_number = 0;
 
+static char **extra_hdr;
+static int extra_hdr_nr;
+static int extra_hdr_alloc;
+
+static char **extra_to;
+static int extra_to_nr;
+static int extra_to_alloc;
+
+static char **extra_cc;
+static int extra_cc_nr;
+static int extra_cc_alloc;
+
+static void add_header(const char *value)
+{
+	int len = strlen(value);
+	while (value[len - 1] == '\n')
+		len--;
+	if (!strncasecmp(value, "to: ", 4)) {
+		ALLOC_GROW(extra_to, extra_to_nr + 1, extra_to_alloc);
+		extra_to[extra_to_nr++] = xstrndup(value + 4, len - 4);
+		return;
+	}
+	if (!strncasecmp(value, "cc: ", 4)) {
+		ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
+		extra_cc[extra_cc_nr++] = xstrndup(value + 4, len - 4);
+		return;
+	}
+	ALLOC_GROW(extra_hdr, extra_hdr_nr + 1, extra_hdr_alloc);
+	extra_hdr[extra_hdr_nr++] = xstrndup(value, len);
+}
+
 static int git_format_config(const char *var, const char *value)
 {
 	if (!strcmp(var, "format.headers")) {
-		int len;
-
 		if (!value)
 			die("format.headers without value");
-		len = strlen(value);
-		extra_headers_size += len + 1;
-		extra_headers = xrealloc(extra_headers, extra_headers_size);
-		extra_headers[extra_headers_size - len - 1] = 0;
-		strcat(extra_headers, value);
+		add_header(value);
 		return 0;
 	}
 	if (!strcmp(var, "format.suffix")) {
@@ -470,74 +500,81 @@ static int git_format_config(const char *var, const char *value)
 }
 
 
-static FILE *realstdout = NULL;
-static const char *output_directory = NULL;
-
-static int reopen_stdout(struct commit *commit, int nr, int keep_subject,
-			 int numbered_files)
+static const char *get_oneline_for_filename(struct commit *commit,
+					    int keep_subject)
 {
-	char filename[PATH_MAX];
+	static char filename[PATH_MAX];
 	char *sol;
 	int len = 0;
 	int suffix_len = strlen(fmt_patch_suffix) + 1;
 
+	sol = strstr(commit->buffer, "\n\n");
+	if (!sol)
+		filename[0] = '\0';
+	else {
+		int j, space = 0;
+
+		sol += 2;
+		/* strip [PATCH] or [PATCH blabla] */
+		if (!keep_subject && !prefixcmp(sol, "[PATCH")) {
+			char *eos = strchr(sol + 6, ']');
+			if (eos) {
+				while (isspace(*eos))
+					eos++;
+				sol = eos;
+			}
+		}
+
+		for (j = 0;
+		     j < FORMAT_PATCH_NAME_MAX - suffix_len - 5 &&
+			     len < sizeof(filename) - suffix_len &&
+			     sol[j] && sol[j] != '\n';
+		     j++) {
+			if (istitlechar(sol[j])) {
+				if (space) {
+					filename[len++] = '-';
+					space = 0;
+				}
+				filename[len++] = sol[j];
+				if (sol[j] == '.')
+					while (sol[j + 1] == '.')
+						j++;
+			} else
+				space = 1;
+		}
+		while (filename[len - 1] == '.'
+		       || filename[len - 1] == '-')
+			len--;
+		filename[len] = '\0';
+	}
+	return filename;
+}
+
+static FILE *realstdout = NULL;
+static const char *output_directory = NULL;
+
+static int reopen_stdout(const char *oneline, int nr, int total)
+{
+	char filename[PATH_MAX];
+	int len = 0;
+	int suffix_len = strlen(fmt_patch_suffix) + 1;
+
 	if (output_directory) {
-		if (strlen(output_directory) >=
+		len = snprintf(filename, sizeof(filename), "%s",
+				output_directory);
+		if (len >=
 		    sizeof(filename) - FORMAT_PATCH_NAME_MAX - suffix_len)
 			return error("name of output directory is too long");
-		strlcpy(filename, output_directory, sizeof(filename) - suffix_len);
-		len = strlen(filename);
 		if (filename[len - 1] != '/')
 			filename[len++] = '/';
 	}
 
-	if (numbered_files) {
-		sprintf(filename + len, "%d", nr);
-		len = strlen(filename);
-
-	} else {
-		sprintf(filename + len, "%04d", nr);
-		len = strlen(filename);
-
-		sol = strstr(commit->buffer, "\n\n");
-		if (sol) {
-			int j, space = 1;
-
-			sol += 2;
-			/* strip [PATCH] or [PATCH blabla] */
-			if (!keep_subject && !prefixcmp(sol, "[PATCH")) {
-				char *eos = strchr(sol + 6, ']');
-				if (eos) {
-					while (isspace(*eos))
-						eos++;
-					sol = eos;
-				}
-			}
-
-			for (j = 0;
-			     j < FORMAT_PATCH_NAME_MAX - suffix_len - 5 &&
-				     len < sizeof(filename) - suffix_len &&
-				     sol[j] && sol[j] != '\n';
-			     j++) {
-				if (istitlechar(sol[j])) {
-					if (space) {
-						filename[len++] = '-';
-						space = 0;
-					}
-					filename[len++] = sol[j];
-					if (sol[j] == '.')
-						while (sol[j + 1] == '.')
-							j++;
-				} else
-					space = 1;
-			}
-			while (filename[len - 1] == '.'
-			       || filename[len - 1] == '-')
-				len--;
-			filename[len] = 0;
-		}
-		if (len + suffix_len >= sizeof(filename))
-			return error("Patch pathname too long");
+	if (!oneline)
+		len += sprintf(filename + len, "%d", nr);
+	else {
+		len += sprintf(filename + len, "%04d-", nr);
+		len += snprintf(filename + len, sizeof(filename) - len - 1
+				- suffix_len, "%s", oneline);
 		strcpy(filename + len, fmt_patch_suffix);
 	}
 
@@ -594,16 +631,92 @@ static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const cha
 	o2->flags = flags2;
 }
 
-static void gen_message_id(char *dest, unsigned int length, char *base)
+static void gen_message_id(struct rev_info *info, char *base)
 {
 	const char *committer = git_committer_info(IDENT_WARN_ON_NO_NAME);
 	const char *email_start = strrchr(committer, '<');
 	const char *email_end = strrchr(committer, '>');
-	if(!email_start || !email_end || email_start > email_end - 1)
+	struct strbuf buf;
+	if (!email_start || !email_end || email_start > email_end - 1)
 		die("Could not extract email from committer identity.");
-	snprintf(dest, length, "%s.%lu.git.%.*s", base,
-		 (unsigned long) time(NULL),
-		 (int)(email_end - email_start - 1), email_start + 1);
+	strbuf_init(&buf, 0);
+	strbuf_addf(&buf, "%s.%lu.git.%.*s", base,
+		    (unsigned long) time(NULL),
+		    (int)(email_end - email_start - 1), email_start + 1);
+	info->message_id = strbuf_detach(&buf, NULL);
+}
+
+static void make_cover_letter(struct rev_info *rev, int use_stdout,
+			      int numbered, int numbered_files,
+			      struct commit *origin,
+			      int nr, struct commit **list, struct commit *head)
+{
+	const char *committer;
+	char *head_sha1;
+	const char *subject_start = NULL;
+	const char *body = "*** SUBJECT HERE ***\n\n*** BLURB HERE ***\n";
+	const char *msg;
+	const char *extra_headers = rev->extra_headers;
+	struct shortlog log;
+	struct strbuf sb;
+	int i;
+	const char *encoding = "utf-8";
+	struct diff_options opts;
+	int need_8bit_cte = 0;
+
+	if (rev->commit_format != CMIT_FMT_EMAIL)
+		die("Cover letter needs email format");
+
+	if (!use_stdout && reopen_stdout(numbered_files ?
+				NULL : "cover-letter", 0, rev->total))
+		return;
+
+	head_sha1 = sha1_to_hex(head->object.sha1);
+
+	log_write_email_headers(rev, head_sha1, &subject_start, &extra_headers,
+				&need_8bit_cte);
+
+	committer = git_committer_info(0);
+
+	msg = body;
+	strbuf_init(&sb, 0);
+	pp_user_info(NULL, CMIT_FMT_EMAIL, &sb, committer, DATE_RFC2822,
+		     encoding);
+	pp_title_line(CMIT_FMT_EMAIL, &msg, &sb, subject_start, extra_headers,
+		      encoding, need_8bit_cte);
+	pp_remainder(CMIT_FMT_EMAIL, &msg, &sb, 0);
+	printf("%s\n", sb.buf);
+
+	strbuf_release(&sb);
+
+	shortlog_init(&log);
+	log.wrap_lines = 1;
+	log.wrap = 72;
+	log.in1 = 2;
+	log.in2 = 4;
+	for (i = 0; i < nr; i++)
+		shortlog_add_commit(&log, list[i]);
+
+	shortlog_output(&log);
+
+	/*
+	 * We can only do diffstat with a unique reference point
+	 */
+	if (!origin)
+		return;
+
+	memcpy(&opts, &rev->diffopt, sizeof(opts));
+	opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
+
+	diff_setup_done(&opts);
+
+	diff_tree_sha1(origin->tree->object.sha1,
+		       head->tree->object.sha1,
+		       "", &opts);
+	diffcore_std(&opts);
+	diff_flush(&opts);
+
+	printf("\n");
 }
 
 static const char *clean_message_id(const char *msg_id)
@@ -641,11 +754,13 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 	int subject_prefix = 0;
 	int ignore_if_in_upstream = 0;
 	int thread = 0;
+	int cover_letter = 0;
+	int boundary_count = 0;
+	struct commit *origin = NULL, *head = NULL;
 	const char *in_reply_to = NULL;
 	struct patch_ids ids;
 	char *add_signoff = NULL;
-	char message_id[1024];
-	char ref_message_id[1024];
+	struct strbuf buf;
 
 	git_config(git_format_config);
 	init_revisions(&rev, prefix);
@@ -658,7 +773,6 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 	DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 
 	rev.subject_prefix = fmt_patch_subject_prefix;
-	rev.extra_headers = extra_headers;
 
 	/*
 	 * Parse the arguments before setup_revisions(), or something
@@ -686,6 +800,10 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 				die("Need a number for --start-number");
 			start_number = strtol(argv[i], NULL, 10);
 		}
+		else if (!prefixcmp(argv[i], "--cc=")) {
+			ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);
+			extra_cc[extra_cc_nr++] = xstrdup(argv[i] + 5);
+		}
 		else if (!strcmp(argv[i], "-k") ||
 				!strcmp(argv[i], "--keep-subject")) {
 			keep_subject = 1;
@@ -742,11 +860,44 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 			rev.subject_prefix = argv[i] + 17;
 		} else if (!prefixcmp(argv[i], "--suffix="))
 			fmt_patch_suffix = argv[i] + 9;
+		else if (!strcmp(argv[i], "--cover-letter"))
+			cover_letter = 1;
 		else
 			argv[j++] = argv[i];
 	}
 	argc = j;
 
+	strbuf_init(&buf, 0);
+
+	for (i = 0; i < extra_hdr_nr; i++) {
+		strbuf_addstr(&buf, extra_hdr[i]);
+		strbuf_addch(&buf, '\n');
+	}
+
+	if (extra_to_nr)
+		strbuf_addstr(&buf, "To: ");
+	for (i = 0; i < extra_to_nr; i++) {
+		if (i)
+			strbuf_addstr(&buf, "    ");
+		strbuf_addstr(&buf, extra_to[i]);
+		if (i + 1 < extra_to_nr)
+			strbuf_addch(&buf, ',');
+		strbuf_addch(&buf, '\n');
+	}
+
+	if (extra_cc_nr)
+		strbuf_addstr(&buf, "Cc: ");
+	for (i = 0; i < extra_cc_nr; i++) {
+		if (i)
+			strbuf_addstr(&buf, "    ");
+		strbuf_addstr(&buf, extra_cc[i]);
+		if (i + 1 < extra_cc_nr)
+			strbuf_addch(&buf, ',');
+		strbuf_addch(&buf, '\n');
+	}
+
+	rev.extra_headers = strbuf_detach(&buf, 0);
+
 	if (start_number < 0)
 		start_number = 1;
 	if (numbered && keep_subject)
@@ -793,6 +944,18 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 		 * get_revision() to do the usual traversal.
 		 */
 	}
+	if (cover_letter) {
+		/* remember the range */
+		int i;
+		for (i = 0; i < rev.pending.nr; i++) {
+			struct object *o = rev.pending.objects[i].item;
+			if (!(o->flags & UNINTERESTING))
+				head = (struct commit *)o;
+		}
+		/* We can't generate a cover letter without any patches */
+		if (!head)
+			return 0;
+	}
 
 	if (ignore_if_in_upstream)
 		get_patch_ids(&rev, &ids, prefix);
@@ -802,7 +965,14 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 
 	if (prepare_revision_walk(&rev))
 		die("revision walk setup failed");
+	rev.boundary = 1;
 	while ((commit = get_revision(&rev)) != NULL) {
+		if (commit->object.flags & BOUNDARY) {
+			boundary_count++;
+			origin = (boundary_count == 1) ? commit : NULL;
+			continue;
+		}
+
 		/* ignore merges */
 		if (commit->parents && commit->parents->next)
 			continue;
@@ -820,29 +990,42 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 		numbered = 1;
 	if (numbered)
 		rev.total = total + start_number - 1;
-	rev.add_signoff = add_signoff;
 	if (in_reply_to)
 		rev.ref_message_id = clean_message_id(in_reply_to);
+	if (cover_letter) {
+		if (thread)
+			gen_message_id(&rev, "cover");
+		make_cover_letter(&rev, use_stdout, numbered, numbered_files,
+				  origin, nr, list, head);
+		total++;
+		start_number--;
+	}
+	rev.add_signoff = add_signoff;
 	while (0 <= --nr) {
 		int shown;
 		commit = list[nr];
 		rev.nr = total - nr + (start_number - 1);
 		/* Make the second and subsequent mails replies to the first */
 		if (thread) {
-			if (nr == (total - 2)) {
-				strncpy(ref_message_id, message_id,
-					sizeof(ref_message_id));
-				ref_message_id[sizeof(ref_message_id)-1]='\0';
-				rev.ref_message_id = ref_message_id;
+			/* Have we already had a message ID? */
+			if (rev.message_id) {
+				/*
+				 * If we've got the ID to be a reply
+				 * to, discard the current ID;
+				 * otherwise, make everything a reply
+				 * to that.
+				 */
+				if (rev.ref_message_id)
+					free(rev.message_id);
+				else
+					rev.ref_message_id = rev.message_id;
 			}
-			gen_message_id(message_id, sizeof(message_id),
-				       sha1_to_hex(commit->object.sha1));
-			rev.message_id = message_id;
+			gen_message_id(&rev, sha1_to_hex(commit->object.sha1));
 		}
-		if (!use_stdout)
-			if (reopen_stdout(commit, rev.nr, keep_subject,
-					  numbered_files))
-				die("Failed to create output files");
+		if (!use_stdout && reopen_stdout(numbered_files ? NULL :
+				get_oneline_for_filename(commit, keep_subject),
+				rev.nr, rev.total))
+			die("Failed to create output files");
 		shown = log_tree_commit(&rev, commit);
 		free(commit->buffer);
 		commit->buffer = NULL;

builtin-ls-files.c

@@ -574,17 +574,8 @@ int cmd_ls_files(int argc, const char **argv, const char *prefix)
 	pathspec = get_pathspec(prefix, argv + i);
 
 	/* Verify that the pathspec matches the prefix */
-	if (pathspec) {
-		if (argc != i) {
-			int cnt;
-			for (cnt = 0; pathspec[cnt]; cnt++)
-				;
-			if (cnt != (argc - i))
-				exit(1); /* error message already given */
-		}
+	if (pathspec)
 		prefix = verify_pathspec(prefix);
-	} else if (argc != i)
-		exit(1); /* error message already given */
 
 	/* Treat unmatching pathspec elements as errors */
 	if (pathspec && error_unmatch) {

builtin-ls-remote.c

@@ -94,11 +94,8 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);
 
 	ref = transport_get_remote_refs(transport);
-	transport_disconnect(transport);
-
-	if (!ref)
+	if (transport_disconnect(transport))
 		return 1;
-
 	for ( ; ref; ref = ref->next) {
 		if (!check_ref_type(ref, flags))
 			continue;

builtin-merge-file.c

@@ -46,7 +46,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
 	}
 
 	ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
-			&xpp, XDL_MERGE_ZEALOUS, &result);
+			&xpp, XDL_MERGE_ZEALOUS_ALNUM, &result);
 
 	for (i = 0; i < 3; i++)
 		free(mmfs[i].ptr);
@@ -57,7 +57,8 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
 
 		if (!f)
 			ret = error("Could not open %s for writing", filename);
-		else if (fwrite(result.ptr, result.size, 1, f) != 1)
+		else if (result.size &&
+			 fwrite(result.ptr, result.size, 1, f) != 1)
 			ret = error("Could not write to %s", filename);
 		else if (fclose(f))
 			ret = error("Could not close %s", filename);

builtin-merge-recursive.c

@@ -7,16 +7,18 @@
 #include "cache-tree.h"
 #include "commit.h"
 #include "blob.h"
+#include "builtin.h"
 #include "tree-walk.h"
 #include "diff.h"
 #include "diffcore.h"
-#include "run-command.h"
 #include "tag.h"
 #include "unpack-trees.h"
 #include "path-list.h"
 #include "xdiff-interface.h"
+#include "ll-merge.h"
 #include "interpolate.h"
 #include "attr.h"
+#include "merge-recursive.h"
 
 static int subtree_merge;
 
@@ -211,6 +213,8 @@ static int git_merge_trees(int index_only,
 	opts.merge = 1;
 	opts.head_idx = 2;
 	opts.fn = threeway_merge;
+	opts.src_index = &the_index;
+	opts.dst_index = &the_index;
 
 	init_tree_desc_from_tree(t+0, common);
 	init_tree_desc_from_tree(t+1, head);
@@ -221,22 +225,11 @@ static int git_merge_trees(int index_only,
 	return rc;
 }
 
-static int unmerged_index(void)
-{
-	int i;
-	for (i = 0; i < active_nr; i++) {
-		struct cache_entry *ce = active_cache[i];
-		if (ce_stage(ce))
-			return 1;
-	}
-	return 0;
-}
-
-static struct tree *git_write_tree(void)
+struct tree *write_tree_from_memory(void)
 {
 	struct tree *result = NULL;
 
-	if (unmerged_index()) {
+	if (unmerged_cache()) {
 		int i;
 		output(0, "There are unmerged index entries:");
 		for (i = 0; i < active_nr; i++) {
@@ -624,364 +617,16 @@ static void fill_mm(const unsigned char *sha1, mmfile_t *mm)
 	mm->size = size;
 }
 
-/*
- * Customizable low-level merge drivers support.
- */
-
-struct ll_merge_driver;
-typedef int (*ll_merge_fn)(const struct ll_merge_driver *,
-			   const char *path,
-			   mmfile_t *orig,
-			   mmfile_t *src1, const char *name1,
-			   mmfile_t *src2, const char *name2,
-			   mmbuffer_t *result);
-
-struct ll_merge_driver {
-	const char *name;
-	const char *description;
-	ll_merge_fn fn;
-	const char *recursive;
-	struct ll_merge_driver *next;
-	char *cmdline;
-};
-
-/*
- * Built-in low-levels
- */
-static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
-			   const char *path_unused,
-			   mmfile_t *orig,
-			   mmfile_t *src1, const char *name1,
-			   mmfile_t *src2, const char *name2,
-			   mmbuffer_t *result)
-{
-	/*
-	 * The tentative merge result is "ours" for the final round,
-	 * or common ancestor for an internal merge.  Still return
-	 * "conflicted merge" status.
-	 */
-	mmfile_t *stolen = index_only ? orig : src1;
-
-	result->ptr = stolen->ptr;
-	result->size = stolen->size;
-	stolen->ptr = NULL;
-	return 1;
-}
-
-static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
-			const char *path_unused,
-			mmfile_t *orig,
-			mmfile_t *src1, const char *name1,
-			mmfile_t *src2, const char *name2,
-			mmbuffer_t *result)
-{
-	xpparam_t xpp;
-
-	if (buffer_is_binary(orig->ptr, orig->size) ||
-	    buffer_is_binary(src1->ptr, src1->size) ||
-	    buffer_is_binary(src2->ptr, src2->size)) {
-		warning("Cannot merge binary files: %s vs. %s\n",
-			name1, name2);
-		return ll_binary_merge(drv_unused, path_unused,
-				       orig, src1, name1,
-				       src2, name2,
-				       result);
-	}
-
-	memset(&xpp, 0, sizeof(xpp));
-	return xdl_merge(orig,
-			 src1, name1,
-			 src2, name2,
-			 &xpp, XDL_MERGE_ZEALOUS,
-			 result);
-}
-
-static int ll_union_merge(const struct ll_merge_driver *drv_unused,
-			  const char *path_unused,
-			  mmfile_t *orig,
-			  mmfile_t *src1, const char *name1,
-			  mmfile_t *src2, const char *name2,
-			  mmbuffer_t *result)
-{
-	char *src, *dst;
-	long size;
-	const int marker_size = 7;
-
-	int status = ll_xdl_merge(drv_unused, path_unused,
-				  orig, src1, NULL, src2, NULL, result);
-	if (status <= 0)
-		return status;
-	size = result->size;
-	src = dst = result->ptr;
-	while (size) {
-		char ch;
-		if ((marker_size < size) &&
-		    (*src == '<' || *src == '=' || *src == '>')) {
-			int i;
-			ch = *src;
-			for (i = 0; i < marker_size; i++)
-				if (src[i] != ch)
-					goto not_a_marker;
-			if (src[marker_size] != '\n')
-				goto not_a_marker;
-			src += marker_size + 1;
-			size -= marker_size + 1;
-			continue;
-		}
-	not_a_marker:
-		do {
-			ch = *src++;
-			*dst++ = ch;
-			size--;
-		} while (ch != '\n' && size);
-	}
-	result->size = dst - result->ptr;
-	return 0;
-}
-
-#define LL_BINARY_MERGE 0
-#define LL_TEXT_MERGE 1
-#define LL_UNION_MERGE 2
-static struct ll_merge_driver ll_merge_drv[] = {
-	{ "binary", "built-in binary merge", ll_binary_merge },
-	{ "text", "built-in 3-way text merge", ll_xdl_merge },
-	{ "union", "built-in union merge", ll_union_merge },
-};
-
-static void create_temp(mmfile_t *src, char *path)
-{
-	int fd;
-
-	strcpy(path, ".merge_file_XXXXXX");
-	fd = xmkstemp(path);
-	if (write_in_full(fd, src->ptr, src->size) != src->size)
-		die("unable to write temp-file");
-	close(fd);
-}
-
-/*
- * User defined low-level merge driver support.
- */
-static int ll_ext_merge(const struct ll_merge_driver *fn,
-			const char *path,
-			mmfile_t *orig,
-			mmfile_t *src1, const char *name1,
-			mmfile_t *src2, const char *name2,
-			mmbuffer_t *result)
-{
-	char temp[3][50];
-	char cmdbuf[2048];
-	struct interp table[] = {
-		{ "%O" },
-		{ "%A" },
-		{ "%B" },
-	};
-	struct child_process child;
-	const char *args[20];
-	int status, fd, i;
-	struct stat st;
-
-	if (fn->cmdline == NULL)
-		die("custom merge driver %s lacks command line.", fn->name);
-
-	result->ptr = NULL;
-	result->size = 0;
-	create_temp(orig, temp[0]);
-	create_temp(src1, temp[1]);
-	create_temp(src2, temp[2]);
-
-	interp_set_entry(table, 0, temp[0]);
-	interp_set_entry(table, 1, temp[1]);
-	interp_set_entry(table, 2, temp[2]);
-
-	output(1, "merging %s using %s", path,
-	       fn->description ? fn->description : fn->name);
-
-	interpolate(cmdbuf, sizeof(cmdbuf), fn->cmdline, table, 3);
-
-	memset(&child, 0, sizeof(child));
-	child.argv = args;
-	args[0] = "sh";
-	args[1] = "-c";
-	args[2] = cmdbuf;
-	args[3] = NULL;
-
-	status = run_command(&child);
-	if (status < -ERR_RUN_COMMAND_FORK)
-		; /* failure in run-command */
-	else
-		status = -status;
-	fd = open(temp[1], O_RDONLY);
-	if (fd < 0)
-		goto bad;
-	if (fstat(fd, &st))
-		goto close_bad;
-	result->size = st.st_size;
-	result->ptr = xmalloc(result->size + 1);
-	if (read_in_full(fd, result->ptr, result->size) != result->size) {
-		free(result->ptr);
-		result->ptr = NULL;
-		result->size = 0;
-	}
- close_bad:
-	close(fd);
- bad:
-	for (i = 0; i < 3; i++)
-		unlink(temp[i]);
-	return status;
-}
-
-/*
- * merge.default and merge.driver configuration items
- */
-static struct ll_merge_driver *ll_user_merge, **ll_user_merge_tail;
-static const char *default_ll_merge;
-
-static int read_merge_config(const char *var, const char *value)
-{
-	struct ll_merge_driver *fn;
-	const char *ep, *name;
-	int namelen;
-
-	if (!strcmp(var, "merge.default")) {
-		if (!value)
-			return config_error_nonbool(var);
-		default_ll_merge = strdup(value);
-		return 0;
-	}
-
-	/*
-	 * We are not interested in anything but "merge.<name>.variable";
-	 * especially, we do not want to look at variables such as
-	 * "merge.summary", "merge.tool", and "merge.verbosity".
-	 */
-	if (prefixcmp(var, "merge.") || (ep = strrchr(var, '.')) == var + 5)
-		return 0;
-
-	/*
-	 * Find existing one as we might be processing merge.<name>.var2
-	 * after seeing merge.<name>.var1.
-	 */
-	name = var + 6;
-	namelen = ep - name;
-	for (fn = ll_user_merge; fn; fn = fn->next)
-		if (!strncmp(fn->name, name, namelen) && !fn->name[namelen])
-			break;
-	if (!fn) {
-		fn = xcalloc(1, sizeof(struct ll_merge_driver));
-		fn->name = xmemdupz(name, namelen);
-		fn->fn = ll_ext_merge;
-		*ll_user_merge_tail = fn;
-		ll_user_merge_tail = &(fn->next);
-	}
-
-	ep++;
-
-	if (!strcmp("name", ep)) {
-		if (!value)
-			return config_error_nonbool(var);
-		fn->description = strdup(value);
-		return 0;
-	}
-
-	if (!strcmp("driver", ep)) {
-		if (!value)
-			return config_error_nonbool(var);
-		/*
-		 * merge.<name>.driver specifies the command line:
-		 *
-		 *	command-line
-		 *
-		 * The command-line will be interpolated with the following
-		 * tokens and is given to the shell:
-		 *
-		 *    %O - temporary file name for the merge base.
-		 *    %A - temporary file name for our version.
-		 *    %B - temporary file name for the other branches' version.
-		 *
-		 * The external merge driver should write the results in the
-		 * file named by %A, and signal that it has done with zero exit
-		 * status.
-		 */
-		fn->cmdline = strdup(value);
-		return 0;
-	}
-
-	if (!strcmp("recursive", ep)) {
-		if (!value)
-			return config_error_nonbool(var);
-		fn->recursive = strdup(value);
-		return 0;
-	}
-
-	return 0;
-}
-
-static void initialize_ll_merge(void)
-{
-	if (ll_user_merge_tail)
-		return;
-	ll_user_merge_tail = &ll_user_merge;
-	git_config(read_merge_config);
-}
-
-static const struct ll_merge_driver *find_ll_merge_driver(const char *merge_attr)
-{
-	struct ll_merge_driver *fn;
-	const char *name;
-	int i;
-
-	initialize_ll_merge();
-
-	if (ATTR_TRUE(merge_attr))
-		return &ll_merge_drv[LL_TEXT_MERGE];
-	else if (ATTR_FALSE(merge_attr))
-		return &ll_merge_drv[LL_BINARY_MERGE];
-	else if (ATTR_UNSET(merge_attr)) {
-		if (!default_ll_merge)
-			return &ll_merge_drv[LL_TEXT_MERGE];
-		else
-			name = default_ll_merge;
-	}
-	else
-		name = merge_attr;
-
-	for (fn = ll_user_merge; fn; fn = fn->next)
-		if (!strcmp(fn->name, name))
-			return fn;
-
-	for (i = 0; i < ARRAY_SIZE(ll_merge_drv); i++)
-		if (!strcmp(ll_merge_drv[i].name, name))
-			return &ll_merge_drv[i];
-
-	/* default to the 3-way */
-	return &ll_merge_drv[LL_TEXT_MERGE];
-}
-
-static const char *git_path_check_merge(const char *path)
-{
-	static struct git_attr_check attr_merge_check;
-
-	if (!attr_merge_check.attr)
-		attr_merge_check.attr = git_attr("merge", 5);
-
-	if (git_checkattr(path, 1, &attr_merge_check))
-		return NULL;
-	return attr_merge_check.value;
-}
-
-static int ll_merge(mmbuffer_t *result_buf,
-		    struct diff_filespec *o,
-		    struct diff_filespec *a,
-		    struct diff_filespec *b,
-		    const char *branch1,
-		    const char *branch2)
+static int merge_3way(mmbuffer_t *result_buf,
+		      struct diff_filespec *o,
+		      struct diff_filespec *a,
+		      struct diff_filespec *b,
+		      const char *branch1,
+		      const char *branch2)
 {
 	mmfile_t orig, src1, src2;
 	char *name1, *name2;
 	int merge_status;
-	const char *ll_driver_name;
-	const struct ll_merge_driver *driver;
 
 	name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
 	name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
@@ -990,14 +635,9 @@ static int ll_merge(mmbuffer_t *result_buf,
 	fill_mm(a->sha1, &src1);
 	fill_mm(b->sha1, &src2);
 
-	ll_driver_name = git_path_check_merge(a->path);
-	driver = find_ll_merge_driver(ll_driver_name);
-
-	if (index_only && driver->recursive)
-		driver = find_ll_merge_driver(driver->recursive);
-	merge_status = driver->fn(driver, a->path,
-				  &orig, &src1, name1, &src2, name2,
-				  result_buf);
+	merge_status = ll_merge(result_buf, a->path, &orig,
+				&src1, name1, &src2, name2,
+				index_only);
 
 	free(name1);
 	free(name2);
@@ -1028,9 +668,20 @@ static struct merge_file_info merge_file(struct diff_filespec *o,
 		if (!sha_eq(a->sha1, o->sha1) && !sha_eq(b->sha1, o->sha1))
 			result.merge = 1;
 
-		result.mode = a->mode == o->mode ? b->mode: a->mode;
+		/*
+		 * Merge modes
+		 */
+		if (a->mode == b->mode || a->mode == o->mode)
+			result.mode = b->mode;
+		else {
+			result.mode = a->mode;
+			if (b->mode != o->mode) {
+				result.clean = 0;
+				result.merge = 1;
+			}
+		}
 
-		if (sha_eq(a->sha1, o->sha1))
+		if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, o->sha1))
 			hashcpy(result.sha, b->sha1);
 		else if (sha_eq(b->sha1, o->sha1))
 			hashcpy(result.sha, a->sha1);
@@ -1038,8 +689,8 @@ static struct merge_file_info merge_file(struct diff_filespec *o,
 			mmbuffer_t result_buf;
 			int merge_status;
 
-			merge_status = ll_merge(&result_buf, o, a, b,
-						branch1, branch2);
+			merge_status = merge_3way(&result_buf, o, a, b,
+						  branch1, branch2);
 
 			if ((merge_status < 0) || !result_buf.ptr)
 				die("Failed to execute internal merge");
@@ -1496,12 +1147,12 @@ static int process_entry(const char *path, struct stage_data *entry,
 	return clean_merge;
 }
 
-static int merge_trees(struct tree *head,
-		       struct tree *merge,
-		       struct tree *common,
-		       const char *branch1,
-		       const char *branch2,
-		       struct tree **result)
+int merge_trees(struct tree *head,
+		struct tree *merge,
+		struct tree *common,
+		const char *branch1,
+		const char *branch2,
+		struct tree **result)
 {
 	int code, clean;
 
@@ -1523,7 +1174,7 @@ static int merge_trees(struct tree *head,
 		    sha1_to_hex(head->object.sha1),
 		    sha1_to_hex(merge->object.sha1));
 
-	if (unmerged_index()) {
+	if (unmerged_cache()) {
 		struct path_list *entries, *re_head, *re_merge;
 		int i;
 		path_list_clear(&current_file_set, 1);
@@ -1553,7 +1204,7 @@ static int merge_trees(struct tree *head,
 		clean = 1;
 
 	if (index_only)
-		*result = git_write_tree();
+		*result = write_tree_from_memory();
 
 	return clean;
 }
@@ -1573,12 +1224,12 @@ static struct commit_list *reverse_commit_list(struct commit_list *list)
  * Merge the commits h1 and h2, return the resulting virtual
  * commit object and a flag indicating the cleanness of the merge.
  */
-static int merge(struct commit *h1,
-		 struct commit *h2,
-		 const char *branch1,
-		 const char *branch2,
-		 struct commit_list *ca,
-		 struct commit **result)
+int merge_recursive(struct commit *h1,
+		    struct commit *h2,
+		    const char *branch1,
+		    const char *branch2,
+		    struct commit_list *ca,
+		    struct commit **result)
 {
 	struct commit_list *iter;
 	struct commit *merged_common_ancestors;
@@ -1623,11 +1274,11 @@ static int merge(struct commit *h1,
 		 * "conflicts" were already resolved.
 		 */
 		discard_cache();
-		merge(merged_common_ancestors, iter->item,
-		      "Temporary merge branch 1",
-		      "Temporary merge branch 2",
-		      NULL,
-		      &merged_common_ancestors);
+		merge_recursive(merged_common_ancestors, iter->item,
+				"Temporary merge branch 1",
+				"Temporary merge branch 2",
+				NULL,
+				&merged_common_ancestors);
 		call_depth--;
 
 		if (!merged_common_ancestors)
@@ -1698,7 +1349,7 @@ static int merge_config(const char *var, const char *value)
 	return git_default_config(var, value);
 }
 
-int main(int argc, char *argv[])
+int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
 {
 	static const char *bases[20];
 	static unsigned bases_count = 0;
@@ -1752,7 +1403,7 @@ int main(int argc, char *argv[])
 		struct commit *ancestor = get_ref(bases[i]);
 		ca = commit_list_insert(ancestor, &ca);
 	}
-	clean = merge(h1, h2, branch1, branch2, ca, &result);
+	clean = merge_recursive(h1, h2, branch1, branch2, ca, &result);
 
 	if (active_cache_changed &&
 	    (write_cache(index_fd, active_cache, active_nr) ||

builtin-mv.c

@@ -19,7 +19,6 @@ static const char **copy_pathspec(const char *prefix, const char **pathspec,
 				  int count, int base_name)
 {
 	int i;
-	int len = prefix ? strlen(prefix) : 0;
 	const char **result = xmalloc((count + 1) * sizeof(const char *));
 	memcpy(result, pathspec, count * sizeof(const char *));
 	result[count] = NULL;
@@ -33,11 +32,8 @@ static const char **copy_pathspec(const char *prefix, const char **pathspec,
 			if (last_slash)
 				result[i] = last_slash + 1;
 		}
-		result[i] = prefix_path(prefix, len, result[i]);
-		if (!result[i])
-			exit(1); /* error already given */
 	}
-	return result;
+	return get_pathspec(prefix, result);
 }
 
 static void show_list(const char *label, struct path_list *list)

builtin-name-rev.c

@@ -125,7 +125,7 @@ static int name_ref(const char *path, const unsigned char *sha1, int flags, void
 }
 
 /* returns a static buffer */
-static const char *get_rev_name(struct object *o)
+static const char *get_rev_name(const struct object *o)
 {
 	static char buffer[1024];
 	struct rev_name *n;
@@ -151,6 +151,26 @@ static const char *get_rev_name(struct object *o)
 	}
 }
 
+static void show_name(const struct object *obj,
+		      const char *caller_name,
+		      int always, int allow_undefined, int name_only)
+{
+	const char *name;
+	const unsigned char *sha1 = obj->sha1;
+
+	if (!name_only)
+		printf("%s ", caller_name ? caller_name : sha1_to_hex(sha1));
+	name = get_rev_name(obj);
+	if (name)
+		printf("%s\n", name);
+	else if (allow_undefined)
+		printf("undefined\n");
+	else if (always)
+		printf("%s\n", find_unique_abbrev(sha1, DEFAULT_ABBREV));
+	else
+		die("cannot describe '%s'", sha1_to_hex(sha1));
+}
+
 static char const * const name_rev_usage[] = {
 	"git-name-rev [options] ( --all | --stdin | <commit>... )",
 	NULL
@@ -159,7 +179,7 @@ static char const * const name_rev_usage[] = {
 int cmd_name_rev(int argc, const char **argv, const char *prefix)
 {
 	struct object_array revs = { 0, 0, NULL };
-	int all = 0, transform_stdin = 0, allow_undefined = 1;
+	int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0;
 	struct name_ref_data data = { 0, 0, NULL };
 	struct option opts[] = {
 		OPT_BOOLEAN(0, "name-only", &data.name_only, "print only names (no SHA-1)"),
@@ -170,6 +190,8 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
 		OPT_BOOLEAN(0, "all", &all, "list all commits reachable from all refs"),
 		OPT_BOOLEAN(0, "stdin", &transform_stdin, "read from stdin"),
 		OPT_BOOLEAN(0, "undefined", &allow_undefined, "allow to print `undefined` names"),
+		OPT_BOOLEAN(0, "always",     &always,
+			   "show abbreviated commit object as fallback"),
 		OPT_END(),
 	};
 
@@ -258,35 +280,14 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
 		int i, max;
 
 		max = get_max_object_index();
-		for (i = 0; i < max; i++) {
-			struct object * obj = get_indexed_object(i);
-			const char *name;
-			if (!obj)
-				continue;
-			if (!data.name_only)
-				printf("%s ", sha1_to_hex(obj->sha1));
-			name = get_rev_name(obj);
-			if (name)
-				printf("%s\n", name);
-			else if (allow_undefined)
-				printf("undefined\n");
-			else
-				die("cannot describe '%s'", sha1_to_hex(obj->sha1));
-		}
+		for (i = 0; i < max; i++)
+			show_name(get_indexed_object(i), NULL,
+				  always, allow_undefined, data.name_only);
 	} else {
 		int i;
-		for (i = 0; i < revs.nr; i++) {
-			const char *name;
-			if (!data.name_only)
-				printf("%s ", revs.objects[i].name);
-			name = get_rev_name(revs.objects[i].item);
-			if (name)
-				printf("%s\n", name);
-			else if (allow_undefined)
-				printf("undefined\n");
-			else
-				die("cannot describe '%s'", sha1_to_hex(revs.objects[i].item->sha1));
-		}
+		for (i = 0; i < revs.nr; i++)
+			show_name(revs.objects[i].item, revs.objects[i].name,
+				  always, allow_undefined, data.name_only);
 	}
 
 	return 0;

builtin-pack-objects.c

@@ -8,14 +8,17 @@
 #include "tree.h"
 #include "delta.h"
 #include "pack.h"
+#include "pack-revindex.h"
 #include "csum-file.h"
 #include "tree-walk.h"
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"
 #include "progress.h"
+#include "refs.h"
 
 #ifdef THREADED_DELTA_SEARCH
+#include "thread-utils.h"
 #include <pthread.h>
 #endif
 
@@ -25,7 +28,8 @@ git-pack-objects [{ -q | --progress | --all-progress }] \n\
 	[--window=N] [--window-memory=N] [--depth=N] \n\
 	[--no-reuse-delta] [--no-reuse-object] [--delta-base-offset] \n\
 	[--threads=N] [--non-empty] [--revs [--unpacked | --all]*] [--reflog] \n\
-	[--stdout | base-name] [--keep-unreachable] [<ref-list | <object-list]";
+	[--stdout | base-name] [--include-tag] [--keep-unreachable] \n\
+	[<ref-list | <object-list]";
 
 struct object_entry {
 	struct pack_idx_entry idx;
@@ -61,7 +65,7 @@ static struct pack_idx_entry **written_list;
 static uint32_t nr_objects, nr_alloc, nr_result, nr_written;
 
 static int non_empty;
-static int no_reuse_delta, no_reuse_object, keep_unreachable;
+static int no_reuse_delta, no_reuse_object, keep_unreachable, include_tag;
 static int local;
 static int incremental;
 static int allow_ofs_delta;
@@ -91,158 +95,12 @@ static unsigned long window_memory_limit = 0;
 static int *object_ix;
 static int object_ix_hashsz;
 
-/*
- * Pack index for existing packs give us easy access to the offsets into
- * corresponding pack file where each object's data starts, but the entries
- * do not store the size of the compressed representation (uncompressed
- * size is easily available by examining the pack entry header).  It is
- * also rather expensive to find the sha1 for an object given its offset.
- *
- * We build a hashtable of existing packs (pack_revindex), and keep reverse
- * index here -- pack index file is sorted by object name mapping to offset;
- * this pack_revindex[].revindex array is a list of offset/index_nr pairs
- * ordered by offset, so if you know the offset of an object, next offset
- * is where its packed representation ends and the index_nr can be used to
- * get the object sha1 from the main index.
- */
-struct revindex_entry {
-	off_t offset;
-	unsigned int nr;
-};
-struct pack_revindex {
-	struct packed_git *p;
-	struct revindex_entry *revindex;
-};
-static struct  pack_revindex *pack_revindex;
-static int pack_revindex_hashsz;
-
 /*
  * stats
  */
 static uint32_t written, written_delta;
 static uint32_t reused, reused_delta;
 
-static int pack_revindex_ix(struct packed_git *p)
-{
-	unsigned long ui = (unsigned long)p;
-	int i;
-
-	ui = ui ^ (ui >> 16); /* defeat structure alignment */
-	i = (int)(ui % pack_revindex_hashsz);
-	while (pack_revindex[i].p) {
-		if (pack_revindex[i].p == p)
-			return i;
-		if (++i == pack_revindex_hashsz)
-			i = 0;
-	}
-	return -1 - i;
-}
-
-static void prepare_pack_ix(void)
-{
-	int num;
-	struct packed_git *p;
-	for (num = 0, p = packed_git; p; p = p->next)
-		num++;
-	if (!num)
-		return;
-	pack_revindex_hashsz = num * 11;
-	pack_revindex = xcalloc(sizeof(*pack_revindex), pack_revindex_hashsz);
-	for (p = packed_git; p; p = p->next) {
-		num = pack_revindex_ix(p);
-		num = - 1 - num;
-		pack_revindex[num].p = p;
-	}
-	/* revindex elements are lazily initialized */
-}
-
-static int cmp_offset(const void *a_, const void *b_)
-{
-	const struct revindex_entry *a = a_;
-	const struct revindex_entry *b = b_;
-	return (a->offset < b->offset) ? -1 : (a->offset > b->offset) ? 1 : 0;
-}
-
-/*
- * Ordered list of offsets of objects in the pack.
- */
-static void prepare_pack_revindex(struct pack_revindex *rix)
-{
-	struct packed_git *p = rix->p;
-	int num_ent = p->num_objects;
-	int i;
-	const char *index = p->index_data;
-
-	rix->revindex = xmalloc(sizeof(*rix->revindex) * (num_ent + 1));
-	index += 4 * 256;
-
-	if (p->index_version > 1) {
-		const uint32_t *off_32 =
-			(uint32_t *)(index + 8 + p->num_objects * (20 + 4));
-		const uint32_t *off_64 = off_32 + p->num_objects;
-		for (i = 0; i < num_ent; i++) {
-			uint32_t off = ntohl(*off_32++);
-			if (!(off & 0x80000000)) {
-				rix->revindex[i].offset = off;
-			} else {
-				rix->revindex[i].offset =
-					((uint64_t)ntohl(*off_64++)) << 32;
-				rix->revindex[i].offset |=
-					ntohl(*off_64++);
-			}
-			rix->revindex[i].nr = i;
-		}
-	} else {
-		for (i = 0; i < num_ent; i++) {
-			uint32_t hl = *((uint32_t *)(index + 24 * i));
-			rix->revindex[i].offset = ntohl(hl);
-			rix->revindex[i].nr = i;
-		}
-	}
-
-	/* This knows the pack format -- the 20-byte trailer
-	 * follows immediately after the last object data.
-	 */
-	rix->revindex[num_ent].offset = p->pack_size - 20;
-	rix->revindex[num_ent].nr = -1;
-	qsort(rix->revindex, num_ent, sizeof(*rix->revindex), cmp_offset);
-}
-
-static struct revindex_entry * find_packed_object(struct packed_git *p,
-						  off_t ofs)
-{
-	int num;
-	int lo, hi;
-	struct pack_revindex *rix;
-	struct revindex_entry *revindex;
-	num = pack_revindex_ix(p);
-	if (num < 0)
-		die("internal error: pack revindex uninitialized");
-	rix = &pack_revindex[num];
-	if (!rix->revindex)
-		prepare_pack_revindex(rix);
-	revindex = rix->revindex;
-	lo = 0;
-	hi = p->num_objects + 1;
-	do {
-		int mi = (lo + hi) / 2;
-		if (revindex[mi].offset == ofs) {
-			return revindex + mi;
-		}
-		else if (ofs < revindex[mi].offset)
-			hi = mi;
-		else
-			lo = mi + 1;
-	} while (lo < hi);
-	die("internal error: pack revindex corrupt");
-}
-
-static const unsigned char *find_packed_object_name(struct packed_git *p,
-						    off_t ofs)
-{
-	struct revindex_entry *entry = find_packed_object(p, ofs);
-	return nth_packed_object_sha1(p, entry->nr);
-}
 
 static void *delta_against(void *buf, unsigned long size, struct object_entry *entry)
 {
@@ -509,7 +367,7 @@ static unsigned long write_object(struct sha1file *f,
 		}
 		hdrlen = encode_header(obj_type, entry->size, header);
 		offset = entry->in_pack_offset;
-		revidx = find_packed_object(p, offset);
+		revidx = find_pack_revindex(p, offset);
 		datalen = revidx[1].offset - offset;
 		if (!pack_to_stdout && p->index_version > 1 &&
 		    check_pack_crc(p, &w_curs, offset, datalen, revidx->nr))
@@ -596,6 +454,7 @@ static void write_pack_file(void)
 	struct pack_header hdr;
 	int do_progress = progress >> pack_to_stdout;
 	uint32_t nr_remaining = nr_result;
+	time_t last_mtime = 0;
 
 	if (do_progress)
 		progress_state = start_progress("Writing objects", nr_result);
@@ -646,6 +505,7 @@ static void write_pack_file(void)
 
 		if (!pack_to_stdout) {
 			mode_t mode = umask(0);
+			struct stat st;
 			char *idx_tmp_name, tmpname[PATH_MAX];
 
 			umask(mode);
@@ -653,6 +513,7 @@ static void write_pack_file(void)
 
 			idx_tmp_name = write_idx_file(NULL, written_list,
 						      nr_written, sha1);
+
 			snprintf(tmpname, sizeof(tmpname), "%s-%s.pack",
 				 base_name, sha1_to_hex(sha1));
 			if (adjust_perm(pack_tmp_name, mode))
@@ -661,6 +522,28 @@ static void write_pack_file(void)
 			if (rename(pack_tmp_name, tmpname))
 				die("unable to rename temporary pack file: %s",
 				    strerror(errno));
+
+			/*
+			 * Packs are runtime accessed in their mtime
+			 * order since newer packs are more likely to contain
+			 * younger objects.  So if we are creating multiple
+			 * packs then we should modify the mtime of later ones
+			 * to preserve this property.
+			 */
+			if (stat(tmpname, &st) < 0) {
+				warning("failed to stat %s: %s",
+					tmpname, strerror(errno));
+			} else if (!last_mtime) {
+				last_mtime = st.st_mtime;
+			} else {
+				struct utimbuf utb;
+				utb.actime = st.st_atime;
+				utb.modtime = --last_mtime;
+				if (utime(tmpname, &utb) < 0)
+					warning("failed utime() on %s: %s",
+						tmpname, strerror(errno));
+			}
+
 			snprintf(tmpname, sizeof(tmpname), "%s-%s.idx",
 				 base_name, sha1_to_hex(sha1));
 			if (adjust_perm(idx_tmp_name, mode))
@@ -669,6 +552,7 @@ static void write_pack_file(void)
 			if (rename(idx_tmp_name, tmpname))
 				die("unable to rename temporary index file: %s",
 				    strerror(errno));
+
 			free(idx_tmp_name);
 			free(pack_tmp_name);
 			puts(sha1_to_hex(sha1));
@@ -1161,8 +1045,11 @@ static void check_object(struct object_entry *entry)
 				die("delta base offset out of bound for %s",
 				    sha1_to_hex(entry->idx.sha1));
 			ofs = entry->in_pack_offset - ofs;
-			if (!no_reuse_delta && !entry->preferred_base)
-				base_ref = find_packed_object_name(p, ofs);
+			if (!no_reuse_delta && !entry->preferred_base) {
+				struct revindex_entry *revidx;
+				revidx = find_pack_revindex(p, ofs);
+				base_ref = nth_packed_object_sha1(p, revidx->nr);
+			}
 			entry->in_pack_header_size = used + used_0;
 			break;
 		}
@@ -1239,9 +1126,11 @@ static void get_object_details(void)
 		sorted_by_offset[i] = objects + i;
 	qsort(sorted_by_offset, nr_objects, sizeof(*sorted_by_offset), pack_offset_sort);
 
-	prepare_pack_ix();
+	init_pack_revindex();
+
 	for (i = 0; i < nr_objects; i++)
 		check_object(sorted_by_offset[i]);
+
 	free(sorted_by_offset);
 }
 
@@ -1428,8 +1317,7 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
 	 * accounting lock.  Compiler will optimize the strangeness
 	 * away when THREADED_DELTA_SEARCH is not defined.
 	 */
-	if (trg_entry->delta_data)
-		free(trg_entry->delta_data);
+	free(trg_entry->delta_data);
 	cache_lock();
 	if (trg_entry->delta_data) {
 		delta_cache_size -= trg_entry->delta_size;
@@ -1770,6 +1658,18 @@ static void ll_find_deltas(struct object_entry **list, unsigned list_size,
 #define ll_find_deltas(l, s, w, d, p)	find_deltas(l, &s, w, d, p)
 #endif
 
+static int add_ref_tag(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+{
+	unsigned char peeled[20];
+
+	if (!prefixcmp(path, "refs/tags/") && /* is a tag? */
+	    !peel_ref(path, peeled)        && /* peelable? */
+	    !is_null_sha1(peeled)          && /* annotated tag? */
+	    locate_object_entry(peeled))      /* object packed? */
+		add_object_entry(sha1, OBJ_TAG, NULL, 0);
+	return 0;
+}
+
 static void prepare_pack(int window, int depth)
 {
 	struct object_entry **delta_list;
@@ -1852,11 +1752,11 @@ static int git_pack_config(const char *k, const char *v)
 	}
 	if (!strcmp(k, "pack.threads")) {
 		delta_search_threads = git_config_int(k, v);
-		if (delta_search_threads < 1)
+		if (delta_search_threads < 0)
 			die("invalid number of threads specified (%d)",
 			    delta_search_threads);
 #ifndef THREADED_DELTA_SEARCH
-		if (delta_search_threads > 1)
+		if (delta_search_threads != 1)
 			warning("no threads support, ignoring %s", k);
 #endif
 		return 0;
@@ -2013,7 +1913,6 @@ static void get_object_list(int ac, const char **av)
 
 	init_revisions(&revs, NULL);
 	save_commit_buffer = 0;
-	track_object_refs = 0;
 	setup_revisions(ac, av, &revs, NULL);
 
 	while (fgets(line, sizeof(line), stdin) != NULL) {
@@ -2122,10 +2021,10 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 		if (!prefixcmp(arg, "--threads=")) {
 			char *end;
 			delta_search_threads = strtoul(arg+10, &end, 0);
-			if (!arg[10] || *end || delta_search_threads < 1)
+			if (!arg[10] || *end || delta_search_threads < 0)
 				usage(pack_usage);
 #ifndef THREADED_DELTA_SEARCH
-			if (delta_search_threads > 1)
+			if (delta_search_threads != 1)
 				warning("no threads support, "
 					"ignoring %s", arg);
 #endif
@@ -2174,6 +2073,10 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 			keep_unreachable = 1;
 			continue;
 		}
+		if (!strcmp("--include-tag", arg)) {
+			include_tag = 1;
+			continue;
+		}
 		if (!strcmp("--unpacked", arg) ||
 		    !prefixcmp(arg, "--unpacked=") ||
 		    !strcmp("--reflog", arg) ||
@@ -2235,6 +2138,11 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 	if (!pack_to_stdout && thin)
 		die("--thin cannot be used to build an indexable pack.");
 
+#ifdef THREADED_DELTA_SEARCH
+	if (!delta_search_threads)	/* --threads=0 means autodetect */
+		delta_search_threads = online_cpus();
+#endif
+
 	prepare_packed_git();
 
 	if (progress)
@@ -2245,6 +2153,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 		rp_av[rp_ac] = NULL;
 		get_object_list(rp_ac, rp_av);
 	}
+	if (include_tag && nr_result)
+		for_each_ref(add_ref_tag, NULL);
 	stop_progress(&progress_state);
 
 	if (non_empty && !nr_result)

builtin-push.c

@@ -44,15 +44,6 @@ static void set_refspecs(const char **refs, int nr)
 			strcat(tag, refs[i]);
 			ref = tag;
 		}
-		if (!strcmp("HEAD", ref)) {
-			unsigned char sha1_dummy[20];
-			ref = resolve_ref(ref, sha1_dummy, 1, NULL);
-			if (!ref)
-				die("HEAD cannot be resolved.");
-			if (prefixcmp(ref, "refs/heads/"))
-				die("HEAD cannot be resolved to branch.");
-			ref = xstrdup(ref + 11);
-		}
 		add_refspec(ref);
 	}
 }

builtin-read-tree.c

@@ -13,16 +13,15 @@
 #include "dir.h"
 #include "builtin.h"
 
-#define MAX_TREES 8
 static int nr_trees;
-static struct tree *trees[MAX_TREES];
+static struct tree *trees[MAX_UNPACK_TREES];
 
 static int list_tree(unsigned char *sha1)
 {
 	struct tree *tree;
 
-	if (nr_trees >= MAX_TREES)
-		die("I cannot read more than %d trees", MAX_TREES);
+	if (nr_trees >= MAX_UNPACK_TREES)
+		die("I cannot read more than %d trees", MAX_UNPACK_TREES);
 	tree = parse_tree_indirect(sha1);
 	if (!tree)
 		return -1;
@@ -41,6 +40,7 @@ static int read_cache_unmerged(void)
 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];
 		if (ce_stage(ce)) {
+			remove_index_entry(ce);
 			if (last && !strcmp(ce->name, last->name))
 				continue;
 			cache_tree_invalidate_path(active_cache_tree, ce->name);
@@ -96,11 +96,13 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
 {
 	int i, newfd, stage = 0;
 	unsigned char sha1[20];
-	struct tree_desc t[MAX_TREES];
+	struct tree_desc t[MAX_UNPACK_TREES];
 	struct unpack_trees_options opts;
 
 	memset(&opts, 0, sizeof(opts));
 	opts.head_idx = -1;
+	opts.src_index = &the_index;
+	opts.dst_index = &the_index;
 
 	git_config(git_default_config);
 
@@ -219,27 +221,6 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
 	if ((opts.dir && !opts.update))
 		die("--exclude-per-directory is meaningless unless -u");
 
-	if (opts.prefix) {
-		int pfxlen = strlen(opts.prefix);
-		int pos;
-		if (opts.prefix[pfxlen-1] != '/')
-			die("prefix must end with /");
-		if (stage != 2)
-			die("binding merge takes only one tree");
-		pos = cache_name_pos(opts.prefix, pfxlen);
-		if (0 <= pos)
-			die("corrupt index file");
-		pos = -pos-1;
-		if (pos < active_nr &&
-		    !strncmp(active_cache[pos]->name, opts.prefix, pfxlen))
-			die("subdirectory '%s' already exists.", opts.prefix);
-		pos = cache_name_pos(opts.prefix, pfxlen-1);
-		if (0 <= pos)
-			die("file '%.*s' already exists.",
-					pfxlen-1, opts.prefix);
-		opts.pos = -1 - pos;
-	}
-
 	if (opts.merge) {
 		if (stage < 2)
 			die("just how do you expect me to merge %d trees?", stage-1);
@@ -268,7 +249,8 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
 		parse_tree(tree);
 		init_tree_desc(t+i, tree->buffer, tree->size);
 	}
-	unpack_trees(nr_trees, t, &opts);
+	if (unpack_trees(nr_trees, t, &opts))
+		return 128;
 
 	/*
 	 * When reading only one tree (either the most basic form,

builtin-reflog.c

@@ -14,6 +14,8 @@
 
 static const char reflog_expire_usage[] =
 "git-reflog (show|expire) [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
+static const char reflog_delete_usage[] =
+"git-reflog delete [--verbose] [--dry-run] [--rewrite] [--updateref] <refs>...";
 
 static unsigned long default_reflog_expire;
 static unsigned long default_reflog_expire_unreachable;
@@ -22,9 +24,12 @@ struct cmd_reflog_expire_cb {
 	struct rev_info revs;
 	int dry_run;
 	int stalefix;
+	int rewrite;
+	int updateref;
 	int verbose;
 	unsigned long expire_total;
 	unsigned long expire_unreachable;
+	int recno;
 };
 
 struct expire_reflog_cb {
@@ -32,6 +37,7 @@ struct expire_reflog_cb {
 	const char *ref;
 	struct commit *ref_commit;
 	struct cmd_reflog_expire_cb *cmd;
+	unsigned char last_kept_sha1[20];
 };
 
 struct collected_reflog {
@@ -213,6 +219,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 	if (timestamp < cb->cmd->expire_total)
 		goto prune;
 
+	if (cb->cmd->rewrite)
+		osha1 = cb->last_kept_sha1;
+
 	old = new = NULL;
 	if (cb->cmd->stalefix &&
 	    (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
@@ -230,6 +239,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 			goto prune;
 	}
 
+	if (cb->cmd->recno && --(cb->cmd->recno) == 0)
+		goto prune;
+
 	if (cb->newlog) {
 		char sign = (tz < 0) ? '-' : '+';
 		int zone = (tz < 0) ? (-tz) : tz;
@@ -237,6 +249,7 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 			sha1_to_hex(osha1), sha1_to_hex(nsha1),
 			email, timestamp, sign, zone,
 			message);
+		hashcpy(cb->last_kept_sha1, nsha1);
 	}
 	if (cb->cmd->verbose)
 		printf("keep %s", message);
@@ -276,13 +289,24 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
 	for_each_reflog_ent(ref, expire_reflog_ent, &cb);
  finish:
 	if (cb.newlog) {
-		if (fclose(cb.newlog))
+		if (fclose(cb.newlog)) {
 			status |= error("%s: %s", strerror(errno),
 					newlog_path);
-		if (rename(newlog_path, log_file)) {
+			unlink(newlog_path);
+		} else if (cmd->updateref &&
+			(write_in_full(lock->lock_fd,
+				sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
+			 write_in_full(lock->lock_fd, "\n", 1) != 1 ||
+			 close_ref(lock) < 0)) {
+			status |= error("Couldn't write %s",
+				lock->lk->filename);
+			unlink(newlog_path);
+		} else if (rename(newlog_path, log_file)) {
 			status |= error("cannot rename %s to %s",
 					newlog_path, log_file);
 			unlink(newlog_path);
+		} else if (cmd->updateref && commit_ref(lock)) {
+			status |= error("Couldn't set %s", lock->ref_name);
 		}
 	}
 	free(newlog_path);
@@ -357,6 +381,10 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 			cb.expire_unreachable = approxidate(arg + 21);
 		else if (!strcmp(arg, "--stale-fix"))
 			cb.stalefix = 1;
+		else if (!strcmp(arg, "--rewrite"))
+			cb.rewrite = 1;
+		else if (!strcmp(arg, "--updateref"))
+			cb.updateref = 1;
 		else if (!strcmp(arg, "--all"))
 			do_all = 1;
 		else if (!strcmp(arg, "--verbose"))
@@ -405,6 +433,78 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 	return status;
 }
 
+static int count_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+		const char *email, unsigned long timestamp, int tz,
+		const char *message, void *cb_data)
+{
+	struct cmd_reflog_expire_cb *cb = cb_data;
+	if (!cb->expire_total || timestamp < cb->expire_total)
+		cb->recno++;
+	return 0;
+}
+
+static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
+{
+	struct cmd_reflog_expire_cb cb;
+	int i, status = 0;
+
+	memset(&cb, 0, sizeof(cb));
+
+	for (i = 1; i < argc; i++) {
+		const char *arg = argv[i];
+		if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
+			cb.dry_run = 1;
+		else if (!strcmp(arg, "--rewrite"))
+			cb.rewrite = 1;
+		else if (!strcmp(arg, "--updateref"))
+			cb.updateref = 1;
+		else if (!strcmp(arg, "--verbose"))
+			cb.verbose = 1;
+		else if (!strcmp(arg, "--")) {
+			i++;
+			break;
+		}
+		else if (arg[0] == '-')
+			usage(reflog_delete_usage);
+		else
+			break;
+	}
+
+	if (argc - i < 1)
+		return error("Nothing to delete?");
+
+	for ( ; i < argc; i++) {
+		const char *spec = strstr(argv[i], "@{");
+		unsigned char sha1[20];
+		char *ep, *ref;
+		int recno;
+
+		if (!spec) {
+			status |= error("Not a reflog: %s", argv[i]);
+			continue;
+		}
+
+		if (!dwim_ref(argv[i], spec - argv[i], sha1, &ref)) {
+			status |= error("%s points nowhere!", argv[i]);
+			continue;
+		}
+
+		recno = strtoul(spec + 2, &ep, 10);
+		if (*ep == '}') {
+			cb.recno = -recno;
+			for_each_reflog_ent(ref, count_reflog_ent, &cb);
+		} else {
+			cb.expire_total = approxidate(spec + 2);
+			for_each_reflog_ent(ref, count_reflog_ent, &cb);
+			cb.expire_total = 0;
+		}
+
+		status |= expire_reflog(ref, sha1, 0, &cb);
+		free(ref);
+	}
+	return status;
+}
+
 /*
  * main "reflog"
  */
@@ -424,6 +524,9 @@ int cmd_reflog(int argc, const char **argv, const char *prefix)
 	if (!strcmp(argv[1], "expire"))
 		return cmd_reflog_expire(argc - 1, argv + 1, prefix);
 
+	if (!strcmp(argv[1], "delete"))
+		return cmd_reflog_delete(argc - 1, argv + 1, prefix);
+
 	/* Not a recognized reflog command..*/
 	usage(reflog_usage);
 }

builtin-remote.c

@@ -0,0 +1,605 @@
+#include "cache.h"
+#include "parse-options.h"
+#include "transport.h"
+#include "remote.h"
+#include "path-list.h"
+#include "strbuf.h"
+#include "run-command.h"
+#include "refs.h"
+
+static const char * const builtin_remote_usage[] = {
+	"git remote",
+	"git remote add <name> <url>",
+	"git remote rm <name>",
+	"git remote show <name>",
+	"git remote prune <name>",
+	"git remote update [group]",
+	NULL
+};
+
+static int verbose;
+
+static inline int postfixcmp(const char *string, const char *postfix)
+{
+	int len1 = strlen(string), len2 = strlen(postfix);
+	if (len1 < len2)
+		return 1;
+	return strcmp(string + len1 - len2, postfix);
+}
+
+static inline const char *skip_prefix(const char *name, const char *prefix)
+{
+	return !name ? "" :
+		prefixcmp(name, prefix) ?  name : name + strlen(prefix);
+}
+
+static int opt_parse_track(const struct option *opt, const char *arg, int not)
+{
+	struct path_list *list = opt->value;
+	if (not)
+		path_list_clear(list, 0);
+	else
+		path_list_append(arg, list);
+	return 0;
+}
+
+static int fetch_remote(const char *name)
+{
+	const char *argv[] = { "fetch", name, NULL };
+	printf("Updating %s\n", name);
+	if (run_command_v_opt(argv, RUN_GIT_CMD))
+		return error("Could not fetch %s", name);
+	return 0;
+}
+
+static int add(int argc, const char **argv)
+{
+	int fetch = 0, mirror = 0;
+	struct path_list track = { NULL, 0, 0 };
+	const char *master = NULL;
+	struct remote *remote;
+	struct strbuf buf, buf2;
+	const char *name, *url;
+	int i;
+
+	struct option options[] = {
+		OPT_GROUP("add specific options"),
+		OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
+		OPT_CALLBACK('t', "track", &track, "branch",
+			"branch(es) to track", opt_parse_track),
+		OPT_STRING('m', "master", &master, "branch", "master branch"),
+		OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
+		OPT_END()
+	};
+
+	argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
+
+	if (argc < 2)
+		usage_with_options(builtin_remote_usage, options);
+
+	name = argv[0];
+	url = argv[1];
+
+	remote = remote_get(name);
+	if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
+			remote->fetch_refspec_nr))
+		die("remote %s already exists.", name);
+
+	strbuf_init(&buf, 0);
+	strbuf_init(&buf2, 0);
+
+	strbuf_addf(&buf, "remote.%s.url", name);
+	if (git_config_set(buf.buf, url))
+		return 1;
+
+	if (track.nr == 0)
+		path_list_append("*", &track);
+	for (i = 0; i < track.nr; i++) {
+		struct path_list_item *item = track.items + i;
+
+		strbuf_reset(&buf);
+		strbuf_addf(&buf, "remote.%s.fetch", name);
+
+		strbuf_reset(&buf2);
+		if (mirror)
+			strbuf_addf(&buf2, "refs/%s:refs/%s",
+					item->path, item->path);
+		else
+			strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
+					item->path, name, item->path);
+		if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
+			return 1;
+	}
+
+	if (fetch && fetch_remote(name))
+		return 1;
+
+	if (master) {
+		strbuf_reset(&buf);
+		strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
+
+		strbuf_reset(&buf2);
+		strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
+
+		if (create_symref(buf.buf, buf2.buf, "remote add"))
+			return error("Could not setup master '%s'", master);
+	}
+
+	strbuf_release(&buf);
+	strbuf_release(&buf2);
+	path_list_clear(&track, 0);
+
+	return 0;
+}
+
+struct branch_info {
+	char *remote;
+	struct path_list merge;
+};
+
+static struct path_list branch_list;
+
+static int config_read_branches(const char *key, const char *value)
+{
+	if (!prefixcmp(key, "branch.")) {
+		char *name;
+		struct path_list_item *item;
+		struct branch_info *info;
+		enum { REMOTE, MERGE } type;
+
+		key += 7;
+		if (!postfixcmp(key, ".remote")) {
+			name = xstrndup(key, strlen(key) - 7);
+			type = REMOTE;
+		} else if (!postfixcmp(key, ".merge")) {
+			name = xstrndup(key, strlen(key) - 6);
+			type = MERGE;
+		} else
+			return 0;
+
+		item = path_list_insert(name, &branch_list);
+
+		if (!item->util)
+			item->util = xcalloc(sizeof(struct branch_info), 1);
+		info = item->util;
+		if (type == REMOTE) {
+			if (info->remote)
+				warning("more than one branch.%s", key);
+			info->remote = xstrdup(value);
+		} else {
+			char *space = strchr(value, ' ');
+			value = skip_prefix(value, "refs/heads/");
+			while (space) {
+				char *merge;
+				merge = xstrndup(value, space - value);
+				path_list_append(merge, &info->merge);
+				value = skip_prefix(space + 1, "refs/heads/");
+				space = strchr(value, ' ');
+			}
+			path_list_append(xstrdup(value), &info->merge);
+		}
+	}
+	return 0;
+}
+
+static void read_branches(void)
+{
+	if (branch_list.nr)
+		return;
+	git_config(config_read_branches);
+	sort_path_list(&branch_list);
+}
+
+struct ref_states {
+	struct remote *remote;
+	struct strbuf remote_prefix;
+	struct path_list new, stale, tracked;
+};
+
+static int handle_one_branch(const char *refname,
+	const unsigned char *sha1, int flags, void *cb_data)
+{
+	struct ref_states *states = cb_data;
+	struct refspec refspec;
+
+	memset(&refspec, 0, sizeof(refspec));
+	refspec.dst = (char *)refname;
+	if (!remote_find_tracking(states->remote, &refspec)) {
+		struct path_list_item *item;
+		const char *name = skip_prefix(refspec.src, "refs/heads/");
+		if (unsorted_path_list_has_path(&states->tracked, name) ||
+				unsorted_path_list_has_path(&states->new,
+					name))
+			return 0;
+		item = path_list_append(name, &states->stale);
+		item->util = xstrdup(refname);
+	}
+	return 0;
+}
+
+static int get_ref_states(const struct ref *ref, struct ref_states *states)
+{
+	struct ref *fetch_map = NULL, **tail = &fetch_map;
+	int i;
+
+	for (i = 0; i < states->remote->fetch_refspec_nr; i++)
+		if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
+			die("Could not get fetch map for refspec %s",
+				states->remote->fetch_refspec[i]);
+
+	states->new.strdup_paths = states->tracked.strdup_paths = 1;
+	for (ref = fetch_map; ref; ref = ref->next) {
+		struct path_list *target = &states->tracked;
+		unsigned char sha1[20];
+		void *util = NULL;
+
+		if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
+			target = &states->new;
+		else {
+			target = &states->tracked;
+			if (hashcmp(sha1, ref->new_sha1))
+				util = &states;
+		}
+		path_list_append(skip_prefix(ref->name, "refs/heads/"),
+				target)->util = util;
+	}
+	free_refs(fetch_map);
+
+	strbuf_addf(&states->remote_prefix,
+		"refs/remotes/%s/", states->remote->name);
+	for_each_ref(handle_one_branch, states);
+	sort_path_list(&states->stale);
+
+	return 0;
+}
+
+struct branches_for_remote {
+	const char *prefix;
+	struct path_list *branches;
+};
+
+static int add_branch_for_removal(const char *refname,
+	const unsigned char *sha1, int flags, void *cb_data)
+{
+	struct branches_for_remote *branches = cb_data;
+
+	if (!prefixcmp(refname, branches->prefix)) {
+		struct path_list_item *item;
+
+		/* make sure that symrefs are deleted */
+		if (flags & REF_ISSYMREF)
+			return unlink(git_path(refname));
+
+		item = path_list_append(refname, branches->branches);
+		item->util = xmalloc(20);
+		hashcpy(item->util, sha1);
+	}
+
+	return 0;
+}
+
+static int remove_branches(struct path_list *branches)
+{
+	int i, result = 0;
+	for (i = 0; i < branches->nr; i++) {
+		struct path_list_item *item = branches->items + i;
+		const char *refname = item->path;
+		unsigned char *sha1 = item->util;
+
+		if (delete_ref(refname, sha1))
+			result |= error("Could not remove branch %s", refname);
+	}
+	return result;
+}
+
+static int rm(int argc, const char **argv)
+{
+	struct option options[] = {
+		OPT_END()
+	};
+	struct remote *remote;
+	struct strbuf buf;
+	struct path_list branches = { NULL, 0, 0, 1 };
+	struct branches_for_remote cb_data = { NULL, &branches };
+	int i;
+
+	if (argc != 2)
+		usage_with_options(builtin_remote_usage, options);
+
+	remote = remote_get(argv[1]);
+	if (!remote)
+		die("No such remote: %s", argv[1]);
+
+	strbuf_init(&buf, 0);
+	strbuf_addf(&buf, "remote.%s", remote->name);
+	if (git_config_rename_section(buf.buf, NULL) < 1)
+		return error("Could not remove config section '%s'", buf.buf);
+
+	read_branches();
+	for (i = 0; i < branch_list.nr; i++) {
+		struct path_list_item *item = branch_list.items + i;
+		struct branch_info *info = item->util;
+		if (info->remote && !strcmp(info->remote, remote->name)) {
+			const char *keys[] = { "remote", "merge", NULL }, **k;
+			for (k = keys; *k; k++) {
+				strbuf_reset(&buf);
+				strbuf_addf(&buf, "branch.%s.%s",
+						item->path, *k);
+				if (git_config_set(buf.buf, NULL)) {
+					strbuf_release(&buf);
+					return -1;
+				}
+			}
+		}
+	}
+
+	/*
+	 * We cannot just pass a function to for_each_ref() which deletes
+	 * the branches one by one, since for_each_ref() relies on cached
+	 * refs, which are invalidated when deleting a branch.
+	 */
+	strbuf_reset(&buf);
+	strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
+	cb_data.prefix = buf.buf;
+	i = for_each_ref(add_branch_for_removal, &cb_data);
+	strbuf_release(&buf);
+
+	if (!i)
+		i = remove_branches(&branches);
+	path_list_clear(&branches, 1);
+
+	return i;
+}
+
+static void show_list(const char *title, struct path_list *list)
+{
+	int i;
+
+	if (!list->nr)
+		return;
+
+	printf(title, list->nr > 1 ? "es" : "");
+	printf("\n    ");
+	for (i = 0; i < list->nr; i++)
+		printf("%s%s", i ? " " : "", list->items[i].path);
+	printf("\n");
+}
+
+static int show_or_prune(int argc, const char **argv, int prune)
+{
+	int dry_run = 0, result = 0;
+	struct option options[] = {
+		OPT_GROUP("show specific options"),
+		OPT__DRY_RUN(&dry_run),
+		OPT_END()
+	};
+	struct ref_states states;
+
+	argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
+
+	if (argc < 1)
+		usage_with_options(builtin_remote_usage, options);
+
+	memset(&states, 0, sizeof(states));
+	for (; argc; argc--, argv++) {
+		struct transport *transport;
+		const struct ref *ref;
+		struct strbuf buf;
+		int i, got_states;
+
+		states.remote = remote_get(*argv);
+		if (!states.remote)
+			return error("No such remote: %s", *argv);
+		transport = transport_get(NULL, states.remote->url_nr > 0 ?
+			states.remote->url[0] : NULL);
+		ref = transport_get_remote_refs(transport);
+		transport_disconnect(transport);
+
+		read_branches();
+		got_states = get_ref_states(ref, &states);
+		if (got_states)
+			result = error("Error getting local info for '%s'",
+					states.remote->name);
+
+		if (prune) {
+			struct strbuf buf;
+			int prefix_len;
+
+			strbuf_init(&buf, 0);
+			if (states.remote->fetch_refspec_nr == 1 &&
+					states.remote->fetch->pattern &&
+					!strcmp(states.remote->fetch->src,
+						states.remote->fetch->dst))
+				/* handle --mirror remote */
+				strbuf_addstr(&buf, "refs/heads/");
+			else
+				strbuf_addf(&buf, "refs/remotes/%s/", *argv);
+			prefix_len = buf.len;
+
+			for (i = 0; i < states.stale.nr; i++) {
+				strbuf_setlen(&buf, prefix_len);
+				strbuf_addstr(&buf, states.stale.items[i].path);
+				result |= delete_ref(buf.buf, NULL);
+			}
+
+			strbuf_release(&buf);
+			goto cleanup_states;
+		}
+
+		printf("* remote %s\n  URL: %s\n", *argv,
+			states.remote->url_nr > 0 ?
+				states.remote->url[0] : "(no URL)");
+
+		for (i = 0; i < branch_list.nr; i++) {
+			struct path_list_item *branch = branch_list.items + i;
+			struct branch_info *info = branch->util;
+			int j;
+
+			if (!info->merge.nr || strcmp(*argv, info->remote))
+				continue;
+			printf("  Remote branch%s merged with 'git pull' "
+				"while on branch %s\n   ",
+				info->merge.nr > 1 ? "es" : "",
+				branch->path);
+			for (j = 0; j < info->merge.nr; j++)
+				printf(" %s", info->merge.items[j].path);
+			printf("\n");
+		}
+
+		if (got_states)
+			continue;
+		strbuf_init(&buf, 0);
+		strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
+			"store in remotes/%s)", states.remote->name);
+		show_list(buf.buf, &states.new);
+		strbuf_release(&buf);
+		show_list("  Stale tracking branch%s (use 'git remote prune')",
+				&states.stale);
+		show_list("  Tracked remote branch%s",
+				&states.tracked);
+
+		if (states.remote->push_refspec_nr) {
+			printf("  Local branch%s pushed with 'git push'\n   ",
+				states.remote->push_refspec_nr > 1 ?
+					"es" : "");
+			for (i = 0; i < states.remote->push_refspec_nr; i++) {
+				struct refspec *spec = states.remote->push + i;
+				printf(" %s%s%s%s", spec->force ? "+" : "",
+					skip_prefix(spec->src, "refs/heads/"),
+					spec->dst ? ":" : "",
+					skip_prefix(spec->dst, "refs/heads/"));
+			}
+		}
+cleanup_states:
+		/* NEEDSWORK: free remote */
+		path_list_clear(&states.new, 0);
+		path_list_clear(&states.stale, 0);
+		path_list_clear(&states.tracked, 0);
+	}
+
+	return result;
+}
+
+static int get_one_remote_for_update(struct remote *remote, void *priv)
+{
+	struct path_list *list = priv;
+	if (!remote->skip_default_update)
+		path_list_append(xstrdup(remote->name), list);
+	return 0;
+}
+
+struct remote_group {
+	const char *name;
+	struct path_list *list;
+} remote_group;
+
+static int get_remote_group(const char *key, const char *value)
+{
+	if (!prefixcmp(key, "remotes.") &&
+			!strcmp(key + 8, remote_group.name)) {
+		/* split list by white space */
+		int space = strcspn(value, " \t\n");
+		while (*value) {
+			if (space > 1)
+				path_list_append(xstrndup(value, space),
+						remote_group.list);
+			value += space + (value[space] != '\0');
+			space = strcspn(value, " \t\n");
+		}
+	}
+
+	return 0;
+}
+
+static int update(int argc, const char **argv)
+{
+	int i, result = 0;
+	struct path_list list = { NULL, 0, 0, 0 };
+	static const char *default_argv[] = { NULL, "default", NULL };
+
+	if (argc < 2) {
+		argc = 2;
+		argv = default_argv;
+	}
+
+	remote_group.list = &list;
+	for (i = 1; i < argc; i++) {
+		remote_group.name = argv[i];
+		result = git_config(get_remote_group);
+	}
+
+	if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
+		result = for_each_remote(get_one_remote_for_update, &list);
+
+	for (i = 0; i < list.nr; i++)
+		result |= fetch_remote(list.items[i].path);
+
+	/* all names were strdup()ed or strndup()ed */
+	list.strdup_paths = 1;
+	path_list_clear(&list, 0);
+
+	return result;
+}
+
+static int get_one_entry(struct remote *remote, void *priv)
+{
+	struct path_list *list = priv;
+
+	path_list_append(remote->name, list)->util = remote->url_nr ?
+		(void *)remote->url[0] : NULL;
+	if (remote->url_nr > 1)
+		warning("Remote %s has more than one URL", remote->name);
+
+	return 0;
+}
+
+static int show_all(void)
+{
+	struct path_list list = { NULL, 0, 0 };
+	int result = for_each_remote(get_one_entry, &list);
+
+	if (!result) {
+		int i;
+
+		sort_path_list(&list);
+		for (i = 0; i < list.nr; i++) {
+			struct path_list_item *item = list.items + i;
+			printf("%s%s%s\n", item->path,
+				verbose ? "\t" : "",
+				verbose && item->util ?
+					(const char *)item->util : "");
+		}
+	}
+	return result;
+}
+
+int cmd_remote(int argc, const char **argv, const char *prefix)
+{
+	struct option options[] = {
+		OPT__VERBOSE(&verbose),
+		OPT_END()
+	};
+	int result;
+
+	argc = parse_options(argc, argv, options, builtin_remote_usage,
+		PARSE_OPT_STOP_AT_NON_OPTION);
+
+	if (argc < 1)
+		result = show_all();
+	else if (!strcmp(argv[0], "add"))
+		result = add(argc, argv);
+	else if (!strcmp(argv[0], "rm"))
+		result = rm(argc, argv);
+	else if (!strcmp(argv[0], "show"))
+		result = show_or_prune(argc, argv, 0);
+	else if (!strcmp(argv[0], "prune"))
+		result = show_or_prune(argc, argv, 1);
+	else if (!strcmp(argv[0], "update"))
+		result = update(argc, argv);
+	else {
+		error("Unknown subcommand: %s", argv[0]);
+		usage_with_options(builtin_remote_usage, options);
+	}
+
+	return result ? 1 : 0;
+}

builtin-rerere.c

@@ -267,23 +267,6 @@ static int diff_two(const char *file1, const char *label1,
 	return 0;
 }
 
-static int copy_file(const char *src, const char *dest)
-{
-	FILE *in, *out;
-	char buffer[32768];
-	int count;
-
-	if (!(in = fopen(src, "r")))
-		return error("Could not open %s", src);
-	if (!(out = fopen(dest, "w")))
-		return error("Could not open %s", dest);
-	while ((count = fread(buffer, 1, sizeof(buffer), in)))
-		fwrite(buffer, 1, count, out);
-	fclose(in);
-	fclose(out);
-	return 0;
-}
-
 static int do_plain_rerere(struct path_list *rr, int fd)
 {
 	struct path_list conflict = { NULL, 0, 0, 1 };
@@ -343,7 +326,7 @@ static int do_plain_rerere(struct path_list *rr, int fd)
 			continue;
 
 		fprintf(stderr, "Recorded resolution for '%s'.\n", path);
-		copy_file(path, rr_path(name, "postimage"));
+		copy_file(rr_path(name, "postimage"), path, 0666);
 tail_optimization:
 		if (i < rr->nr - 1)
 			memmove(rr->items + i,

builtin-reset.c

@@ -16,9 +16,14 @@
 #include "diff.h"
 #include "diffcore.h"
 #include "tree.h"
+#include "branch.h"
+#include "parse-options.h"
 
-static const char builtin_reset_usage[] =
-"git-reset [--mixed | --soft | --hard] [-q] [<commit-ish>] [ [--] <paths>...]";
+static const char * const git_reset_usage[] = {
+	"git-reset [--mixed | --soft | --hard] [-q] [<commit>]",
+	"git-reset [--mixed] <commit> [--] <paths>...",
+	NULL
+};
 
 static char *args_to_str(const char **argv)
 {
@@ -44,18 +49,6 @@ static inline int is_merge(void)
 	return !access(git_path("MERGE_HEAD"), F_OK);
 }
 
-static int unmerged_files(void)
-{
-	int i;
-	read_cache();
-	for (i = 0; i < active_nr; i++) {
-		struct cache_entry *ce = active_cache[i];
-		if (ce_stage(ce))
-			return 1;
-	}
-	return 0;
-}
-
 static int reset_index_file(const unsigned char *sha1, int is_hard_reset)
 {
 	int i = 0;
@@ -74,14 +67,10 @@ static int reset_index_file(const unsigned char *sha1, int is_hard_reset)
 
 static void print_new_head_line(struct commit *commit)
 {
-	const char *hex, *dots = "...", *body;
+	const char *hex, *body;
 
 	hex = find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV);
-	if (!hex) {
-		hex = sha1_to_hex(commit->object.sha1);
-		dots = "";
-	}
-	printf("HEAD is now at %s%s", hex, dots);
+	printf("HEAD is now at %s", hex);
 	body = strstr(commit->buffer, "\n\n");
 	if (body) {
 		const char *eol;
@@ -180,40 +169,31 @@ static const char *reset_type_names[] = { "mixed", "soft", "hard", NULL };
 
 int cmd_reset(int argc, const char **argv, const char *prefix)
 {
-	int i = 1, reset_type = NONE, update_ref_status = 0, quiet = 0;
+	int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0;
 	const char *rev = "HEAD";
 	unsigned char sha1[20], *orig = NULL, sha1_orig[20],
 				*old_orig = NULL, sha1_old_orig[20];
 	struct commit *commit;
 	char *reflog_action, msg[1024];
+	const struct option options[] = {
+		OPT_SET_INT(0, "mixed", &reset_type,
+						"reset HEAD and index", MIXED),
+		OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT),
+		OPT_SET_INT(0, "hard", &reset_type,
+				"reset HEAD, index and working tree", HARD),
+		OPT_BOOLEAN('q', NULL, &quiet,
+				"disable showing new HEAD in hard reset"),
+		OPT_END()
+	};
 
 	git_config(git_default_config);
 
+	argc = parse_options(argc, argv, options, git_reset_usage,
+						PARSE_OPT_KEEP_DASHDASH);
 	reflog_action = args_to_str(argv);
 	setenv("GIT_REFLOG_ACTION", reflog_action, 0);
 
-	while (i < argc) {
-		if (!strcmp(argv[i], "--mixed")) {
-			reset_type = MIXED;
-			i++;
-		}
-		else if (!strcmp(argv[i], "--soft")) {
-			reset_type = SOFT;
-			i++;
-		}
-		else if (!strcmp(argv[i], "--hard")) {
-			reset_type = HARD;
-			i++;
-		}
-		else if (!strcmp(argv[i], "-q")) {
-			quiet = 1;
-			i++;
-		}
-		else
-			break;
-	}
-
-	if (i < argc && argv[i][0] != '-')
+	if (i < argc && strcmp(argv[i], "--"))
 		rev = argv[i++];
 
 	if (get_sha1(rev, sha1))
@@ -226,8 +206,6 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 
 	if (i < argc && !strcmp(argv[i], "--"))
 		i++;
-	else if (i < argc && argv[i][0] == '-')
-		usage(builtin_reset_usage);
 
 	/* git reset tree [--] paths... can be used to
 	 * load chosen paths from the tree into the index without
@@ -250,7 +228,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 	 * at all, but requires them in a good order.  Other resets reset
 	 * the index file to the tree object we are switching to. */
 	if (reset_type == SOFT) {
-		if (is_merge() || unmerged_files())
+		if (is_merge() || read_cache() < 0 || unmerged_cache())
 			die("Cannot do a soft reset in the middle of a merge.");
 	}
 	else if (reset_index_file(sha1, (reset_type == HARD)))
@@ -282,10 +260,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 		break;
 	}
 
-	unlink(git_path("MERGE_HEAD"));
-	unlink(git_path("rr-cache/MERGE_RR"));
-	unlink(git_path("MERGE_MSG"));
-	unlink(git_path("SQUASH_MSG"));
+	remove_branch_state();
 
 	free(reflog_action);
 

builtin-rev-list.c

@@ -25,6 +25,9 @@ static const char rev_list_usage[] =
 "    --no-merges\n"
 "    --remove-empty\n"
 "    --all\n"
+"    --branches\n"
+"    --tags\n"
+"    --remotes\n"
 "    --stdin\n"
 "    --quiet\n"
 "  ordering output:\n"
@@ -607,7 +610,6 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 		usage(rev_list_usage);
 
 	save_commit_buffer = revs.verbose_header || revs.grep_filter;
-	track_object_refs = 0;
 	if (bisect_list)
 		revs.limited = 1;
 

builtin-rev-parse.c

@@ -315,25 +315,31 @@ static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 		s = strchr(sb.buf, ' ');
 		if (!s || *sb.buf == ' ') {
 			o->type = OPTION_GROUP;
-			o->help = xstrdup(skipspaces(s));
+			o->help = xstrdup(skipspaces(sb.buf));
 			continue;
 		}
 
 		o->type = OPTION_CALLBACK;
 		o->help = xstrdup(skipspaces(s));
 		o->value = &parsed;
+		o->flags = PARSE_OPT_NOARG;
 		o->callback = &parseopt_dump;
-		switch (s[-1]) {
-		case '=':
-			s--;
-			break;
-		case '?':
-			o->flags = PARSE_OPT_OPTARG;
-			s--;
-			break;
-		default:
-			o->flags = PARSE_OPT_NOARG;
-			break;
+		while (s > sb.buf && strchr("*=?!", s[-1])) {
+			switch (*--s) {
+			case '=':
+				o->flags &= ~PARSE_OPT_NOARG;
+				break;
+			case '?':
+				o->flags &= ~PARSE_OPT_NOARG;
+				o->flags |= PARSE_OPT_OPTARG;
+				break;
+			case '!':
+				o->flags |= PARSE_OPT_NONEG;
+				break;
+			case '*':
+				o->flags |= PARSE_OPT_HIDDEN;
+				break;
+			}
 		}
 
 		if (s - sb.buf == 1) /* short option only */

builtin-revert.c

@@ -9,6 +9,8 @@
 #include "utf8.h"
 #include "parse-options.h"
 #include "cache-tree.h"
+#include "diff.h"
+#include "revision.h"
 
 /*
  * This implements the builtins revert and cherry-pick.
@@ -246,6 +248,17 @@ static char *help_msg(const unsigned char *sha1)
 	return helpbuf;
 }
 
+static int index_is_dirty(void)
+{
+	struct rev_info rev;
+	init_revisions(&rev, NULL);
+	setup_revisions(0, NULL, &rev, "HEAD");
+	DIFF_OPT_SET(&rev.diffopt, QUIET);
+	DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
+	run_diff_index(&rev, 1);
+	return !!DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES);
+}
+
 static int revert_or_cherry_pick(int argc, const char **argv)
 {
 	unsigned char head[20];
@@ -274,12 +287,11 @@ static int revert_or_cherry_pick(int argc, const char **argv)
 		if (write_cache_as_tree(head, 0, NULL))
 			die ("Your index file is unmerged.");
 	} else {
-		struct wt_status s;
-
 		if (get_sha1("HEAD", head))
 			die ("You do not have a valid HEAD");
-		wt_status_prepare(&s);
-		if (s.commitable)
+		if (read_cache() < 0)
+			die("could not read the index");
+		if (index_is_dirty())
 			die ("Dirty index: cannot %s", me);
 		discard_cache();
 	}
@@ -397,8 +409,7 @@ static int revert_or_cherry_pick(int argc, const char **argv)
 		else
 			return execl_git_cmd("commit", "-n", "-F", defmsg, NULL);
 	}
-	if (reencoded_message)
-		free(reencoded_message);
+	free(reencoded_message);
 
 	return 0;
 }

builtin-send-pack.c

@@ -71,6 +71,7 @@ static int pack_objects(int fd, struct ref *refs)
 		refs = refs->next;
 	}
 
+	close(po.in);
 	if (finish_command(&po))
 		return error("pack-objects died with strange error");
 	return 0;
@@ -263,9 +264,7 @@ static void print_ref_status(char flag, const char *summary, struct ref *to, str
 
 static const char *status_abbrev(unsigned char sha1[20])
 {
-	const char *abbrev;
-	abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
-	return abbrev ? abbrev : sha1_to_hex(sha1);
+	return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 }
 
 static void print_ok_ref_status(struct ref *ref)
@@ -403,12 +402,15 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 	if (!remote_tail)
 		remote_tail = &remote_refs;
 	if (match_refs(local_refs, remote_refs, &remote_tail,
-					       nr_refspec, refspec, flags))
+		       nr_refspec, refspec, flags)) {
+		close(out);
 		return -1;
+	}
 
 	if (!remote_refs) {
 		fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
 			"Perhaps you should specify a branch such as 'master'.\n");
+		close(out);
 		return 0;
 	}
 
@@ -495,12 +497,11 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 
 	packet_flush(out);
 	if (new_refs && !args.dry_run) {
-		if (pack_objects(out, remote_refs) < 0) {
-			close(out);
+		if (pack_objects(out, remote_refs) < 0)
 			return -1;
-		}
 	}
-	close(out);
+	else
+		close(out);
 
 	if (expect_status_report)
 		ret = receive_status(in, remote_refs);
@@ -648,7 +649,7 @@ int send_pack(struct send_pack_args *my_args,
 	conn = git_connect(fd, dest, args.receivepack, args.verbose ? CONNECT_VERBOSE : 0);
 	ret = do_send_pack(fd[0], fd[1], remote, dest, nr_heads, heads);
 	close(fd[0]);
-	close(fd[1]);
+	/* do_send_pack always closes fd[1] */
 	ret |= finish_connect(conn);
 	return !!ret;
 }

builtin-shortlog.c

@@ -6,13 +6,11 @@
 #include "revision.h"
 #include "utf8.h"
 #include "mailmap.h"
+#include "shortlog.h"
 
 static const char shortlog_usage[] =
 "git-shortlog [-n] [-s] [-e] [<commit-id>... ]";
 
-static char *common_repo_prefix;
-static int email;
-
 static int compare_by_number(const void *a1, const void *a2)
 {
 	const struct path_list_item *i1 = a1, *i2 = a2;
@@ -26,13 +24,11 @@ static int compare_by_number(const void *a1, const void *a2)
 		return -1;
 }
 
-static struct path_list mailmap = {NULL, 0, 0, 0};
-
-static void insert_one_record(struct path_list *list,
+static void insert_one_record(struct shortlog *log,
 			      const char *author,
 			      const char *oneline)
 {
-	const char *dot3 = common_repo_prefix;
+	const char *dot3 = log->common_repo_prefix;
 	char *buffer, *p;
 	struct path_list_item *item;
 	struct path_list *onelines;
@@ -47,7 +43,7 @@ static void insert_one_record(struct path_list *list,
 	eoemail = strchr(boemail, '>');
 	if (!eoemail)
 		return;
-	if (!map_email(&mailmap, boemail+1, namebuf, sizeof(namebuf))) {
+	if (!map_email(&log->mailmap, boemail+1, namebuf, sizeof(namebuf))) {
 		while (author < boemail && isspace(*author))
 			author++;
 		for (len = 0;
@@ -61,24 +57,25 @@ static void insert_one_record(struct path_list *list,
 	else
 		len = strlen(namebuf);
 
-	if (email) {
+	if (log->email) {
 		size_t room = sizeof(namebuf) - len - 1;
 		int maillen = eoemail - boemail + 1;
 		snprintf(namebuf + len, room, " %.*s", maillen, boemail);
 	}
 
 	buffer = xstrdup(namebuf);
-	item = path_list_insert(buffer, list);
+	item = path_list_insert(buffer, &log->list);
 	if (item->util == NULL)
 		item->util = xcalloc(1, sizeof(struct path_list));
 	else
 		free(buffer);
 
+	/* Skip any leading whitespace, including any blank lines. */
+	while (*oneline && isspace(*oneline))
+		oneline++;
 	eol = strchr(oneline, '\n');
 	if (!eol)
 		eol = oneline + strlen(oneline);
-	while (*oneline && isspace(*oneline) && *oneline != '\n')
-		oneline++;
 	if (!prefixcmp(oneline, "[PATCH")) {
 		char *eob = strchr(oneline, ']');
 		if (eob && (!eol || eob < eol))
@@ -114,7 +111,7 @@ static void insert_one_record(struct path_list *list,
 	onelines->items[onelines->nr++].path = buffer;
 }
 
-static void read_from_stdin(struct path_list *list)
+static void read_from_stdin(struct shortlog *log)
 {
 	char author[1024], oneline[1024];
 
@@ -128,39 +125,43 @@ static void read_from_stdin(struct path_list *list)
 		while (fgets(oneline, sizeof(oneline), stdin) &&
 		       oneline[0] == '\n')
 			; /* discard blanks */
-		insert_one_record(list, author + 8, oneline);
+		insert_one_record(log, author + 8, oneline);
 	}
 }
 
-static void get_from_rev(struct rev_info *rev, struct path_list *list)
+void shortlog_add_commit(struct shortlog *log, struct commit *commit)
+{
+	const char *author = NULL, *buffer;
+
+	buffer = commit->buffer;
+	while (*buffer && *buffer != '\n') {
+		const char *eol = strchr(buffer, '\n');
+
+		if (eol == NULL)
+			eol = buffer + strlen(buffer);
+		else
+			eol++;
+
+		if (!prefixcmp(buffer, "author "))
+			author = buffer + 7;
+		buffer = eol;
+	}
+	if (!author)
+		die("Missing author: %s",
+		    sha1_to_hex(commit->object.sha1));
+	if (*buffer)
+		buffer++;
+	insert_one_record(log, author, !*buffer ? "<none>" : buffer);
+}
+
+static void get_from_rev(struct rev_info *rev, struct shortlog *log)
 {
 	struct commit *commit;
 
 	if (prepare_revision_walk(rev))
 		die("revision walk setup failed");
-	while ((commit = get_revision(rev)) != NULL) {
-		const char *author = NULL, *buffer;
-
-		buffer = commit->buffer;
-		while (*buffer && *buffer != '\n') {
-			const char *eol = strchr(buffer, '\n');
-
-			if (eol == NULL)
-				eol = buffer + strlen(buffer);
-			else
-				eol++;
-
-			if (!prefixcmp(buffer, "author "))
-				author = buffer + 7;
-			buffer = eol;
-		}
-		if (!author)
-			die("Missing author: %s",
-			    sha1_to_hex(commit->object.sha1));
-		if (*buffer)
-			buffer++;
-		insert_one_record(list, author, !*buffer ? "<none>" : buffer);
-	}
+	while ((commit = get_revision(rev)) != NULL)
+		shortlog_add_commit(log, commit);
 }
 
 static int parse_uint(char const **arg, int comma)
@@ -212,29 +213,40 @@ static void parse_wrap_args(const char *arg, int *in1, int *in2, int *wrap)
 		die(wrap_arg_usage);
 }
 
+void shortlog_init(struct shortlog *log)
+{
+	memset(log, 0, sizeof(*log));
+
+	read_mailmap(&log->mailmap, ".mailmap", &log->common_repo_prefix);
+
+	log->list.strdup_paths = 1;
+	log->wrap = DEFAULT_WRAPLEN;
+	log->in1 = DEFAULT_INDENT1;
+	log->in2 = DEFAULT_INDENT2;
+}
+
 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 {
+	struct shortlog log;
 	struct rev_info rev;
-	struct path_list list = { NULL, 0, 0, 1 };
-	int i, j, sort_by_number = 0, summary = 0;
-	int wrap_lines = 0;
-	int wrap = DEFAULT_WRAPLEN;
-	int in1 = DEFAULT_INDENT1;
-	int in2 = DEFAULT_INDENT2;
+	int nongit;
+
+	prefix = setup_git_directory_gently(&nongit);
+	shortlog_init(&log);
 
 	/* since -n is a shadowed rev argument, parse our args first */
 	while (argc > 1) {
 		if (!strcmp(argv[1], "-n") || !strcmp(argv[1], "--numbered"))
-			sort_by_number = 1;
+			log.sort_by_number = 1;
 		else if (!strcmp(argv[1], "-s") ||
 				!strcmp(argv[1], "--summary"))
-			summary = 1;
+			log.summary = 1;
 		else if (!strcmp(argv[1], "-e") ||
 			 !strcmp(argv[1], "--email"))
-			email = 1;
+			log.email = 1;
 		else if (!prefixcmp(argv[1], "-w")) {
-			wrap_lines = 1;
-			parse_wrap_args(argv[1], &in1, &in2, &wrap);
+			log.wrap_lines = 1;
+			parse_wrap_args(argv[1], &log.in1, &log.in2, &log.wrap);
 		}
 		else if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
 			usage(shortlog_usage);
@@ -248,34 +260,38 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 	if (argc > 1)
 		die ("unrecognized argument: %s", argv[1]);
 
-	read_mailmap(&mailmap, ".mailmap", &common_repo_prefix);
-
 	/* assume HEAD if from a tty */
-	if (!rev.pending.nr && isatty(0))
+	if (!nongit && !rev.pending.nr && isatty(0))
 		add_head_to_pending(&rev);
 	if (rev.pending.nr == 0) {
-		read_from_stdin(&list);
+		read_from_stdin(&log);
 	}
 	else
-		get_from_rev(&rev, &list);
+		get_from_rev(&rev, &log);
 
-	if (sort_by_number)
-		qsort(list.items, list.nr, sizeof(struct path_list_item),
+	shortlog_output(&log);
+	return 0;
+}
+
+void shortlog_output(struct shortlog *log)
+{
+	int i, j;
+	if (log->sort_by_number)
+		qsort(log->list.items, log->list.nr, sizeof(struct path_list_item),
 			compare_by_number);
+	for (i = 0; i < log->list.nr; i++) {
+		struct path_list *onelines = log->list.items[i].util;
 
-	for (i = 0; i < list.nr; i++) {
-		struct path_list *onelines = list.items[i].util;
-
-		if (summary) {
-			printf("%6d\t%s\n", onelines->nr, list.items[i].path);
+		if (log->summary) {
+			printf("%6d\t%s\n", onelines->nr, log->list.items[i].path);
 		} else {
-			printf("%s (%d):\n", list.items[i].path, onelines->nr);
+			printf("%s (%d):\n", log->list.items[i].path, onelines->nr);
 			for (j = onelines->nr - 1; j >= 0; j--) {
 				const char *msg = onelines->items[j].path;
 
-				if (wrap_lines) {
-					int col = print_wrapped_text(msg, in1, in2, wrap);
-					if (col != wrap)
+				if (log->wrap_lines) {
+					int col = print_wrapped_text(msg, log->in1, log->in2, log->wrap);
+					if (col != log->wrap)
 						putchar('\n');
 				}
 				else
@@ -287,13 +303,11 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 		onelines->strdup_paths = 1;
 		path_list_clear(onelines, 1);
 		free(onelines);
-		list.items[i].util = NULL;
+		log->list.items[i].util = NULL;
 	}
 
-	list.strdup_paths = 1;
-	path_list_clear(&list, 1);
-	mailmap.strdup_paths = 1;
-	path_list_clear(&mailmap, 1);
-
-	return 0;
+	log->list.strdup_paths = 1;
+	path_list_clear(&log->list, 1);
+	log->mailmap.strdup_paths = 1;
+	path_list_clear(&log->mailmap, 1);
 }

builtin-tag.c

@@ -50,12 +50,15 @@ void launch_editor(const char *path, struct strbuf *buffer, const char *const *e
 		size_t len = strlen(editor);
 		int i = 0;
 		const char *args[6];
+		struct strbuf arg0;
 
+		strbuf_init(&arg0, 0);
 		if (strcspn(editor, "$ \t'") != len) {
 			/* there are specials */
+			strbuf_addf(&arg0, "%s \"$@\"", editor);
 			args[i++] = "sh";
 			args[i++] = "-c";
-			args[i++] = "$0 \"$@\"";
+			args[i++] = arg0.buf;
 		}
 		args[i++] = editor;
 		args[i++] = path;
@@ -63,6 +66,7 @@ void launch_editor(const char *path, struct strbuf *buffer, const char *const *e
 
 		if (run_command_v_opt_cd_env(args, 0, NULL, env))
 			die("There was a problem with the editor %s.", editor);
+		strbuf_release(&arg0);
 	}
 
 	if (!buffer)
@@ -226,12 +230,13 @@ static int do_sign(struct strbuf *buffer)
 
 	if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
 		close(gpg.in);
+		close(gpg.out);
 		finish_command(&gpg);
 		return error("gpg did not accept the tag data");
 	}
 	close(gpg.in);
-	gpg.close_in = 0;
 	len = strbuf_read(buffer, gpg.out, 1024);
+	close(gpg.out);
 
 	if (finish_command(&gpg) || !len || len < 0)
 		return error("gpg failed to sign the tag");

builtin-unpack-objects.c

@@ -8,6 +8,7 @@
 #include "tag.h"
 #include "tree.h"
 #include "progress.h"
+#include "decorate.h"
 
 static int dry_run, quiet, recover, has_errors;
 static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file";
@@ -18,6 +19,18 @@ static unsigned int offset, len;
 static off_t consumed_bytes;
 static SHA_CTX ctx;
 
+struct obj_buffer {
+	char *buffer;
+	unsigned long size;
+};
+
+static struct decoration obj_decorate;
+
+static struct obj_buffer *lookup_object_buffer(struct object *base)
+{
+	return lookup_decoration(&obj_decorate, base);
+}
+
 /*
  * Make sure at least "min" bytes are available in the buffer, and
  * return the pointer to the buffer.
@@ -189,6 +202,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
 	void *delta_data, *base;
 	unsigned long base_size;
 	unsigned char base_sha1[20];
+	struct object *obj;
 
 	if (type == OBJ_REF_DELTA) {
 		hashcpy(base_sha1, fill(20));
@@ -252,6 +266,15 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
 		}
 	}
 
+	obj = lookup_object(base_sha1);
+	if (obj) {
+		struct obj_buffer *obj_buf = lookup_object_buffer(obj);
+		if (obj_buf) {
+			resolve_delta(nr, obj->type, obj_buf->buffer, obj_buf->size, delta_data, delta_size);
+			return;
+		}
+	}
+
 	base = read_sha1_file(base_sha1, &type, &base_size);
 	if (!base) {
 		error("failed to read delta-pack base object %s",

builtin-verify-pack.c

@@ -40,8 +40,8 @@ static int verify_one_pack(const char *path, int verbose)
 	if (!pack)
 		return error("packfile %s not found.", arg);
 
+	install_packed_git(pack);
 	err = verify_pack(pack, verbose);
-	free(pack);
 
 	return err;
 }

builtin-verify-tag.c

@@ -45,14 +45,12 @@ static int run_gpg_verify(const char *buf, unsigned long size, int verbose)
 	memset(&gpg, 0, sizeof(gpg));
 	gpg.argv = args_gpg;
 	gpg.in = -1;
-	gpg.out = 1;
 	args_gpg[2] = path;
 	if (start_command(&gpg))
 		return error("could not run gpg.");
 
 	write_in_full(gpg.in, buf, len);
 	close(gpg.in);
-	gpg.close_in = 0;
 	ret = finish_command(&gpg);
 
 	unlink(path);

builtin.h

@@ -18,6 +18,7 @@ extern int cmd_blame(int argc, const char **argv, const char *prefix);
 extern int cmd_branch(int argc, const char **argv, const char *prefix);
 extern int cmd_bundle(int argc, const char **argv, const char *prefix);
 extern int cmd_cat_file(int argc, const char **argv, const char *prefix);
+extern int cmd_checkout(int argc, const char **argv, const char *prefix);
 extern int cmd_checkout_index(int argc, const char **argv, const char *prefix);
 extern int cmd_check_attr(int argc, const char **argv, const char *prefix);
 extern int cmd_check_ref_format(int argc, const char **argv, const char *prefix);
@@ -56,6 +57,7 @@ extern int cmd_mailsplit(int argc, const char **argv, const char *prefix);
 extern int cmd_merge_base(int argc, const char **argv, const char *prefix);
 extern int cmd_merge_ours(int argc, const char **argv, const char *prefix);
 extern int cmd_merge_file(int argc, const char **argv, const char *prefix);
+extern int cmd_merge_recursive(int argc, const char **argv, const char *prefix);
 extern int cmd_mv(int argc, const char **argv, const char *prefix);
 extern int cmd_name_rev(int argc, const char **argv, const char *prefix);
 extern int cmd_pack_objects(int argc, const char **argv, const char *prefix);
@@ -65,6 +67,7 @@ extern int cmd_prune_packed(int argc, const char **argv, const char *prefix);
 extern int cmd_push(int argc, const char **argv, const char *prefix);
 extern int cmd_read_tree(int argc, const char **argv, const char *prefix);
 extern int cmd_reflog(int argc, const char **argv, const char *prefix);
+extern int cmd_remote(int argc, const char **argv, const char *prefix);
 extern int cmd_config(int argc, const char **argv, const char *prefix);
 extern int cmd_rerere(int argc, const char **argv, const char *prefix);
 extern int cmd_reset(int argc, const char **argv, const char *prefix);

bundle.c

@@ -333,10 +333,12 @@ int create_bundle(struct bundle_header *header, const char *path,
 		write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
 		write_or_die(rls.in, "\n", 1);
 	}
+	close(rls.in);
 	if (finish_command(&rls))
 		return error ("pack-objects died");
-
-	return bundle_to_stdout ? close(bundle_fd) : commit_lock_file(&lock);
+	if (!bundle_to_stdout)
+		commit_lock_file(&lock);
+	return 0;
 }
 
 int unbundle(struct bundle_header *header, int bundle_fd)

cache.h

@@ -110,7 +110,6 @@ struct ondisk_cache_entry {
 };
 
 struct cache_entry {
-	struct cache_entry *next;
 	unsigned int ce_ctime;
 	unsigned int ce_mtime;
 	unsigned int ce_dev;
@@ -121,6 +120,7 @@ struct cache_entry {
 	unsigned int ce_size;
 	unsigned int ce_flags;
 	unsigned char sha1[20];
+	struct cache_entry *next;
 	char name[FLEX_ARRAY]; /* more */
 };
 
@@ -133,7 +133,39 @@ struct cache_entry {
 #define CE_UPDATE    (0x10000)
 #define CE_REMOVE    (0x20000)
 #define CE_UPTODATE  (0x40000)
-#define CE_UNHASHED  (0x80000)
+
+#define CE_HASHED    (0x100000)
+#define CE_UNHASHED  (0x200000)
+
+/*
+ * Copy the sha1 and stat state of a cache entry from one to
+ * another. But we never change the name, or the hash state!
+ */
+#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
+static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
+{
+	unsigned int state = dst->ce_flags & CE_STATE_MASK;
+
+	/* Don't copy hash chain and name */
+	memcpy(dst, src, offsetof(struct cache_entry, next));
+
+	/* Restore the hash state */
+	dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
+}
+
+/*
+ * We don't actually *remove* it, we can just mark it invalid so that
+ * we won't find it in lookups.
+ *
+ * Not only would we have to search the lists (simple enough), but
+ * we'd also have to rehash other hash buckets in case this makes the
+ * hash bucket empty (common). So it's much better to just mark
+ * it.
+ */
+static inline void remove_index_entry(struct cache_entry *ce)
+{
+	ce->ce_flags |= CE_UNHASHED;
+}
 
 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 {
@@ -220,6 +252,7 @@ extern struct index_state the_index;
 #define read_cache_from(path) read_index_from(&the_index, (path))
 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 #define discard_cache() discard_index(&the_index)
+#define unmerged_cache() unmerged_index(&the_index)
 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
@@ -241,6 +274,7 @@ enum object_type {
 	/* 5 for future expansion */
 	OBJ_OFS_DELTA = 6,
 	OBJ_REF_DELTA = 7,
+	OBJ_ANY,
 	OBJ_MAX,
 };
 
@@ -312,11 +346,12 @@ extern void verify_non_filename(const char *prefix, const char *name);
 /* Initialize and use the cache information */
 extern int read_index(struct index_state *);
 extern int read_index_from(struct index_state *, const char *path);
-extern int write_index(struct index_state *, int newfd);
+extern int write_index(const struct index_state *, int newfd);
 extern int discard_index(struct index_state *);
+extern int unmerged_index(const struct index_state *);
 extern int verify_path(const char *path);
 extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
-extern int index_name_pos(struct index_state *, const char *name, int namelen);
+extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 #define ADD_CACHE_OK_TO_ADD 1		/* Ok to add */
 #define ADD_CACHE_OK_TO_REPLACE 2	/* Ok to replace file/directory */
 #define ADD_CACHE_SKIP_DFCHECK 4	/* Ok to skip DF conflict checks */
@@ -333,8 +368,8 @@ extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 #define CE_MATCH_IGNORE_VALID		01
 /* do not check the contents but report dirty on racily-clean entries */
 #define CE_MATCH_RACY_IS_DIRTY	02
-extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
-extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
+extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
+extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 
 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
@@ -391,6 +426,15 @@ enum safe_crlf {
 
 extern enum safe_crlf safe_crlf;
 
+enum branch_track {
+	BRANCH_TRACK_NEVER = 0,
+	BRANCH_TRACK_REMOTE,
+	BRANCH_TRACK_ALWAYS,
+	BRANCH_TRACK_EXPLICIT,
+};
+
+extern enum branch_track git_branch_track;
+
 #define GIT_REPO_VERSION 0
 extern int repository_format_version;
 extern int check_repository_format(void);
@@ -441,11 +485,7 @@ int safe_create_leading_directories(char *path);
 char *enter_repo(char *path, int strict);
 static inline int is_absolute_path(const char *path)
 {
-#ifndef __MINGW32__
-	return path[0] == '/';
-#else
-	return path[0] == '/' || (path[0] && path[1] == ':');
-#endif
+	return path[0] == '/' || has_dos_drive_prefix(path);
 }
 
 static inline int is_dev_null(const char *str)
@@ -507,6 +547,7 @@ extern int create_symref(const char *ref, const char *refs_heads_master, const c
 extern int validate_headref(const char *ref);
 
 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
+extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 
 extern void *read_object_with_reference(const unsigned char *sha1,
@@ -514,6 +555,9 @@ extern void *read_object_with_reference(const unsigned char *sha1,
 					unsigned long *size,
 					unsigned char *sha1_ret);
 
+extern struct object *peel_to_type(const char *name, int namelen,
+				   struct object *o, enum object_type);
+
 enum date_mode {
 	DATE_NORMAL = 0,
 	DATE_RELATIVE,
@@ -681,6 +725,7 @@ extern const char *git_log_output_encoding;
 /* IO helper functions */
 extern void maybe_flush_or_die(FILE *, const char *);
 extern int copy_fd(int ifd, int ofd);
+extern int copy_file(const char *dst, const char *src, int mode);
 extern int read_in_full(int fd, void *buf, size_t count);
 extern int write_in_full(int fd, const void *buf, size_t count);
 extern void write_or_die(int fd, const void *buf, size_t count);
@@ -734,6 +779,7 @@ void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, i
 #define WS_TRAILING_SPACE	01
 #define WS_SPACE_BEFORE_TAB	02
 #define WS_INDENT_WITH_NON_TAB	04
+#define WS_CR_AT_EOL           010
 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
 extern unsigned whitespace_rule_cfg;
 extern unsigned whitespace_rule(const char *);
@@ -742,10 +788,13 @@ extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
     FILE *stream, const char *set,
     const char *reset, const char *ws);
 extern char *whitespace_error_string(unsigned ws);
+extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
 
 /* ls-files */
 int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 
+char *alias_lookup(const char *alias);
+
 #endif /* CACHE_H */

commit.c

@@ -193,7 +193,7 @@ static void prepare_commit_graft(void)
 	commit_graft_prepared = 1;
 }
 
-static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
+struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
 {
 	int pos;
 	prepare_commit_graft();
@@ -290,17 +290,6 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
 	}
 	item->date = parse_commit_date(bufptr, tail);
 
-	if (track_object_refs) {
-		unsigned i = 0;
-		struct commit_list *p;
-		struct object_refs *refs = alloc_object_refs(n_refs);
-		if (item->tree)
-			refs->ref[i++] = &item->tree->object;
-		for (p = item->parents; p; p = p->next)
-			refs->ref[i++] = &p->item->object;
-		set_object_refs(&item->object, refs);
-	}
-
 	return 0;
 }
 

commit.h

@@ -70,7 +70,22 @@ extern void pretty_print_commit(enum cmit_fmt fmt, const struct commit*,
                                 struct strbuf *,
                                 int abbrev, const char *subject,
                                 const char *after_subject, enum date_mode,
-				int non_ascii_present);
+				int need_8bit_cte);
+void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
+		   const char *line, enum date_mode dmode,
+		   const char *encoding);
+void pp_title_line(enum cmit_fmt fmt,
+		   const char **msg_p,
+		   struct strbuf *sb,
+		   const char *subject,
+		   const char *after_subject,
+		   const char *encoding,
+		   int need_8bit_cte);
+void pp_remainder(enum cmit_fmt fmt,
+		  const char **msg_p,
+		  struct strbuf *sb,
+		  int indent);
+
 
 /** Removes the first commit from a list sorted by date, and adds all
  * of its parents.
@@ -101,6 +116,7 @@ struct commit_graft {
 struct commit_graft *read_graft_line(char *buf, int len);
 int register_commit_graft(struct commit_graft *, int);
 int read_graft_file(const char *graft_file);
+struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 
 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
 

compat/mingw.c

@@ -330,16 +330,13 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 #undef getcwd
 char *mingw_getcwd(char *pointer, int len)
 {
+	int i;
 	char *ret = getcwd(pointer, len);
 	if (!ret)
 		return ret;
-	if (pointer[0] != 0 && pointer[1] == ':') {
-		int i;
-		for (i = 2; pointer[i]; i++)
-			/* Thanks, Bill. You'll burn in hell for that. */
-			if (pointer[i] == '\\')
-				pointer[i] = '/';
-	}
+	for (i = 0; pointer[i]; i++)
+		if (pointer[i] == '\\')
+			pointer[i] = '/';
 	return ret;
 }
 
@@ -850,40 +847,6 @@ int mingw_rename(const char *pold, const char *pnew)
 	return -1;
 }
 
-#undef vsnprintf
-/* Note that the size parameter specifies the available space, i.e.
- * includes the trailing NUL byte; but Windows's vsnprintf expects the
- * number of characters to write without the trailing NUL.
- */
-
-/* This is out of line because it uses alloca() behind the scenes,
- * which must not be called in a loop (alloca() reclaims the allocations
- * only at function exit).
- */
-static int try_vsnprintf(size_t size, const char *fmt, va_list args)
-{
-	char buf[size];	/* gcc-ism */
-	return vsnprintf(buf, size-1, fmt, args);
-}
-
-int mingw_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
-{
-	int len;
-	if (size > 0) {
-		len = vsnprintf(buf, size-1, fmt, args);
-		if (len >= 0)
-			return len;
-	}
-	/* ouch, buffer too small; need to compute the size */
-	if (size < 250)
-		size = 250;
-	do {
-		size *= 4;
-		len = try_vsnprintf(size, fmt, args);
-	} while (len < 0);
-	return len;
-}
-
 struct passwd *getpwuid(int uid)
 {
 	static char user_name[100];

compat/mingw.h

@@ -0,0 +1,203 @@
+#include <winsock2.h>
+
+/*
+ * things that are not available in header files
+ */
+
+typedef int pid_t;
+#define hstrerror strerror
+
+#define S_IFLNK    0120000 /* Symbolic link */
+#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
+#define S_ISSOCK(x) 0
+#define S_IRGRP 0
+#define S_IWGRP 0
+#define S_IXGRP 0
+#define S_ISGID 0
+#define S_IROTH 0
+#define S_IXOTH 0
+
+#define WIFEXITED(x) ((unsigned)(x) < 259)	/* STILL_ACTIVE */
+#define WEXITSTATUS(x) ((x) & 0xff)
+#define WIFSIGNALED(x) ((unsigned)(x) > 259)
+
+#define SIGKILL 0
+#define SIGCHLD 0
+#define SIGPIPE 0
+#define SIGALRM 100
+
+#define F_GETFD 1
+#define F_SETFD 2
+#define FD_CLOEXEC 0x1
+
+struct passwd {
+	char *pw_name;
+	char *pw_gecos;
+	char *pw_dir;
+};
+
+struct pollfd {
+	int fd;           /* file descriptor */
+	short events;     /* requested events */
+	short revents;    /* returned events */
+};
+#define POLLIN 1
+#define POLLHUP 2
+
+typedef void (__cdecl *sig_handler_t)(int);
+struct sigaction {
+	sig_handler_t sa_handler;
+	unsigned sa_flags;
+};
+#define sigemptyset(x) (void)0
+#define SA_RESTART 0
+
+struct itimerval {
+	struct timeval it_value, it_interval;
+};
+#define ITIMER_REAL 0
+
+/*
+ * trivial stubs
+ */
+
+static inline int readlink(const char *path, char *buf, size_t bufsiz)
+{ errno = ENOSYS; return -1; }
+static inline int symlink(const char *oldpath, const char *newpath)
+{ errno = ENOSYS; return -1; }
+static inline int link(const char *oldpath, const char *newpath)
+{ errno = ENOSYS; return -1; }
+static inline int fchmod(int fildes, mode_t mode)
+{ errno = ENOSYS; return -1; }
+static inline int fork(void)
+{ errno = ENOSYS; return -1; }
+static inline unsigned int alarm(unsigned int seconds)
+{ return 0; }
+static inline int fsync(int fd)
+{ return 0; }
+static inline int getppid(void)
+{ return 1; }
+static inline void sync(void)
+{}
+static inline int getuid()
+{ return 1; }
+static inline struct passwd *getpwnam(const char *name)
+{ return NULL; }
+static inline int fcntl(int fd, int cmd, long arg)
+{
+	if (cmd == F_GETFD || cmd == F_SETFD)
+		return 0;
+	errno = EINVAL;
+	return -1;
+}
+
+/*
+ * simple adaptors
+ */
+
+static inline int mingw_mkdir(const char *path, int mode)
+{
+	return mkdir(path);
+}
+#define mkdir mingw_mkdir
+
+static inline int mingw_unlink(const char *pathname)
+{
+	/* read-only files cannot be removed */
+	chmod(pathname, 0666);
+	return unlink(pathname);
+}
+#define unlink mingw_unlink
+
+static inline int waitpid(pid_t pid, unsigned *status, unsigned options)
+{
+	if (options == 0)
+		return _cwait(status, pid, 0);
+	errno = EINVAL;
+	return -1;
+}
+
+/*
+ * implementations of missing functions
+ */
+
+int pipe(int filedes[2]);
+unsigned int sleep (unsigned int seconds);
+int mkstemp(char *template);
+int gettimeofday(struct timeval *tv, void *tz);
+int poll(struct pollfd *ufds, unsigned int nfds, int timeout);
+struct tm *gmtime_r(const time_t *timep, struct tm *result);
+struct tm *localtime_r(const time_t *timep, struct tm *result);
+int getpagesize(void);	/* defined in MinGW's libgcc.a */
+struct passwd *getpwuid(int uid);
+int setitimer(int type, struct itimerval *in, struct itimerval *out);
+int sigaction(int sig, struct sigaction *in, struct sigaction *out);
+
+/*
+ * replacements of existing functions
+ */
+
+int mingw_open (const char *filename, int oflags, ...);
+#define open mingw_open
+
+char *mingw_getcwd(char *pointer, int len);
+#define getcwd mingw_getcwd
+
+struct hostent *mingw_gethostbyname(const char *host);
+#define gethostbyname mingw_gethostbyname
+
+int mingw_socket(int domain, int type, int protocol);
+#define socket mingw_socket
+
+int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
+#define connect mingw_connect
+
+int mingw_rename(const char*, const char*);
+#define rename mingw_rename
+
+/* Use mingw_lstat() instead of lstat()/stat() and
+ * mingw_fstat() instead of fstat() on Windows.
+ * struct stat is redefined because it lacks the st_blocks member.
+ */
+struct mingw_stat {
+	unsigned st_mode;
+	time_t st_mtime, st_atime, st_ctime;
+	unsigned st_dev, st_ino, st_uid, st_gid;
+	size_t st_size;
+	size_t st_blocks;
+};
+int mingw_lstat(const char *file_name, struct mingw_stat *buf);
+int mingw_fstat(int fd, struct mingw_stat *buf);
+#define fstat mingw_fstat
+#define lstat mingw_lstat
+#define stat mingw_stat
+static inline int mingw_stat(const char *file_name, struct mingw_stat *buf)
+{ return mingw_lstat(file_name, buf); }
+
+pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env);
+void mingw_execvp(const char *cmd, char *const *argv);
+#define execvp mingw_execvp
+
+static inline unsigned int git_ntohl(unsigned int x)
+{ return (unsigned int)ntohl(x); }
+#define ntohl git_ntohl
+
+sig_handler_t mingw_signal(int sig, sig_handler_t handler);
+#define signal mingw_signal
+
+/*
+ * git specific compatibility
+ */
+
+#define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
+#define is_dir_sep(c) ((c) == '/' || (c) == '\\')
+#define PATH_SEP ';'
+#define PRIuMAX "I64u"
+
+/*
+ * helpers
+ */
+
+char **copy_environ(void);
+void free_environ(char **env);
+char **env_setenv(char **env, const char *name);

compat/snprintf.c

@@ -0,0 +1,49 @@
+#include "../git-compat-util.h"
+
+/*
+ * The size parameter specifies the available space, i.e. includes
+ * the trailing NUL byte; but Windows's vsnprintf expects the
+ * number of characters to write without the trailing NUL.
+ */
+#ifndef SNPRINTF_SIZE_CORR
+#define SNPRINTF_SIZE_CORR 0
+#endif
+
+#undef vsnprintf
+int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap)
+{
+	char *s;
+	int ret;
+
+	ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
+	if (ret != -1)
+		return ret;
+
+	s = NULL;
+	if (maxsize < 128)
+		maxsize = 128;
+
+	while (ret == -1) {
+		maxsize *= 4;
+		str = realloc(s, maxsize);
+		if (! str)
+			break;
+		s = str;
+		ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
+	}
+	free(s);
+	return ret;
+}
+
+int git_snprintf(char *str, size_t maxsize, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, format);
+	ret = git_vsnprintf(str, maxsize, format, ap);
+	va_end(ap);
+
+	return ret;
+}
+

config.c

@@ -471,6 +471,14 @@ int git_default_config(const char *var, const char *value)
 		whitespace_rule_cfg = parse_whitespace_rule(value);
 		return 0;
 	}
+	if (!strcmp(var, "branch.autosetupmerge")) {
+		if (value && !strcasecmp(value, "always")) {
+			git_branch_track = BRANCH_TRACK_ALWAYS;
+			return 0;
+		}
+		git_branch_track = git_config_bool(var, value);
+		return 0;
+	}
 
 	/* Add other config variables here and to Documentation/config.txt. */
 	return 0;