As we are slowly teaching the sequencer to perform the hard work for
the interactive rebase, we need to read files that were written by
shell scripts.
These files typically contain a single line and are invariably ended
by a line feed (and possibly a carriage return before that). Let's use
a helper to read such files and to remove the line ending.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
In interactive rebases, we commit a little bit differently than the
sequencer did so far: we heed the "author-script", the "message" and
the "amend" files in the .git/rebase-merge/ subdirectory.
Likewise, we may want to edit the commit message *even* when providing
a file containing the suggested commit message. Therefore we change the
code to not even provide a default message when we do not want any, and
to call the editor explicitly.
As interactive rebase's GPG settings are configured differently from
how cherry-pick (and therefore sequencer) handles them, we will leave
support for that to the next commit.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The `git-rebase-todo` file contains a list of commands. Most of those
commands have the form
<verb> <sha1> <oneline>
The <oneline> is displayed primarily for the user's convenience, as
rebase -i really interprets only the <verb> <sha1> part. However, there
are *some* places in interactive rebase where the <oneline> is used to
display messages, e.g. for reporting at which commit we stopped.
So let's just remember it when parsing the todo file; we keep a copy of
the entire todo file anyway (to write out the new `done` and
`git-rebase-todo` file just before processing each command), so all we
need to do is remember the begin offsets and lengths.
As we will have to parse and remember the command-line for `exec` commands
later, we do not call the field "oneline" but rather "arg" (and will reuse
that for exec's command-line).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Not only does this DRY up the code (providing a better documentation what
the code is about, as well as allowing to change the behavior in a single
place), it also makes it substantially shorter to use the same
functionality in functions to be introduced when we teach the sequencer to
process interactive-rebase's git-rebase-todo file.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The subcommands are used exactly once, at the very beginning of
sequencer_pick_revisions(), to determine what to do. This is an
unnecessary level of indirection: we can simply call the correct
function to begin with. So let's do that.
While at it, ensure that the subcommands return an error code so that
they do not have to die() all over the place (bad practice for library
functions...).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
When we came up with the "sequencer" idea, we really wanted to have
kind of a plumbing equivalent of the interactive rebase. Hence the
choice of words: the "todo" script, a "pick", etc.
However, when it came time to implement the entire shebang, somehow this
idea got lost and the sequencer was used as working horse for
cherry-pick and revert instead. So as not to interfere with the
interactive rebase, it even uses a separate directory to store its
state.
Furthermore, it also is stupidly strict about the "todo" script it
accepts: while it parses commands in a way that was *designed* to be
similar to the interactive rebase, it then goes on to *error out* if the
commands disagree with the overall action (cherry-pick or revert).
Finally, the sequencer code chose to deviate from the interactive rebase
code insofar that it *reformats* the "todo" script instead of just
writing the part of the parsed script that were not yet processed. This
is not only unnecessary churn, but might well lose information that is
valuable to the user (i.e. comments after the commands).
Let's just bite the bullet and rewrite the entire parser; the code now
becomes not only more elegant: it allows us to go on and teach the
sequencer how to parse *true* "todo" scripts as used by the interactive
rebase itself. In a way, the sequencer is about to grow up to do its
older brother's job. Better.
In particular, we choose to maintain the list of commands in an array
instead of a linked list: this is flexible enough to allow us later on to
even implement rebase -i's reordering of fixup!/squash! commits very
easily (and with a very nice speed bonus, at least on Windows).
While at it, do not stop at the first problem, but list *all* of the
problems. This will help the user when the sequencer will do `rebase
-i`'s work by allowing to address all issues in one go rather than going
back and forth until the todo list is valid.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Over the next commits, we will work on improving the sequencer to the
point where it can process the edit script of an interactive rebase. To
that end, we will need to teach the sequencer to read interactive
rebase's todo file. In preparation, we consolidate all places where
that todo file is needed to call a function that we will later extend.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The sequencer reads options from disk and stores them in its struct
for use during sequencer's operations.
With this patch, the memory is released afterwards, plugging a
memory leak.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
The sequencer is our attempt to lib-ify cherry-pick. Yet it behaves
like a one-shot command when it reads its configuration: memory is
allocated and released only when the command exits.
This is kind of okay for git-cherry-pick, which *is* a one-shot
command. All the work to make the sequencer its work horse was
done to allow using the functionality as a library function, though,
including proper clean-up after use.
This patch introduces an API to pass the responsibility of releasing
certain memory to the sequencer. Example:
const char *label =
sequencer_entrust(opts, xstrfmt("From: %s", email));
The entrusted memory will remain valid until sequencer_remove_state() is
called, or the program exits, whichever comes first.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
In a couple of commits, we will teach the sequencer to handle the
nitty gritty of the interactive rebase, which keeps its state in a
different directory.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We really do not need the *pointer to a* pointer to the options in
the read_populate_opts() function.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This change is not completely faithful: instead of initializing all fields
to 0, we choose to initialize command and subcommand to -1 (instead of
defaulting to REPLAY_REVERT and REPLAY_NONE, respectively). Practically,
it makes no difference at all, but future-proofs the code to require
explicit assignments for both fields.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
A future caller of read_and_refresh_cache() may want to do more than just
print some helpful advice in case of failure.
Suggested by Junio Hamano.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The only callers of checkout_fast_forward(), cmd_merge(),
pull_into_void(), cmd_pull() and sequencer's fast_forward_to(),
already check the return value and handle it appropriately. With this
step, we make it notice an error return from this function.
So this is a safe conversion to make checkout_fast_forward()
callable from new callers that want it not to die, without changing
the external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The only caller of fast_forward_to(), do_pick_commit() already checks
the return value and passes it on to its callers, so its caller must
be already prepared to handle error returns, and with this step, we
make it notice an error return from this function.
So this is a safe conversion to make fast_forward_to() callable from
new callers that want it not to die, without changing the external
behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of save_opts(), sequencer_pick_revisions() can already
return errors, so its caller must be already prepared to handle error
returns, and with this step, we make it notice an error return from
this function.
So this is a safe conversion to make save_opts() callable from new
callers that want it not to die, without changing the external
behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of save_todo(), pick_commits() can already return
errors, so its caller must be already prepared to handle error
returns, and with this step, we make it notice an error return from
this function.
So this is a safe conversion to make save_todo() callable
from new callers that want it not to die, without changing the
external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of save_head(), sequencer_pick_revisions() can already
return errors, so its caller must be already prepared to handle error
returns, and with this step, we make it notice an error return from
this function.
So this is a safe conversion to make save_head() callable from new
callers that want it not to die, without changing the external
behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of create_seq_dir(), sequencer_pick_revisions() can
already return errors, so its caller must be already prepared to
handle error returns, and with this step, we make it notice an error
return from this function.
So this is a safe conversion to make create_seq_dir() callable from
new callers that want it not to die, without changing the external
behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of read_populate_opts(), sequencer_continue() can
already return errors, so its caller must be already prepared to
handle error returns, and with this step, we make it notice an error
return from this function.
So this is a safe conversion to make read_populate_opts() callable
from new callers that want it not to die, without changing the
external behaviour of anything existing.
Note that the function git_config_from_file(), called from
read_populate_opts(), can currently still die() (in git_parse_source(),
because the do_config_from_file() function sets die_on_error = 1). We do
not try to fix that here, as it would have larger ramifications on the
config code, and we also assume that we write the opts file
programmatically, hence any parse errors would be bugs.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The only caller of read_populate_todo(), sequencer_continue() can
already return errors, so its caller must be already prepared to
handle error returns, and with this step, we make it notice an
error return from this function.
So this is a safe conversion to make read_populate_todo() callable
from new callers that want it not to die, without changing the
external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
There are two call sites of read_and_refresh_cache(), one of which is
pick_commits(), whose callers were already prepared to do the right
thing given an "error" return from it by an earlier patch, so the
conversion is safe.
The other one, sequencer_pick_revisions() was also prepared to relay
an error return back to its caller in all remaining cases in an
earlier patch.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only caller of prepare_revs(), walk_revs_populate_todo() was just
taught to return errors, after verifying that its callers are prepared
to handle error returns, and with this step, we make it notice an
error return from this function.
So this is a safe conversion to make prepare_revs() callable from new
callers that want it not to die, without changing the external
behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The function sequencer_pick_revisions() is the only caller of
walk_revs_populate_todo(), and it already returns errors
appropriately, so its caller must be already prepared to handle error
returns, and with this step, we make it notice an error return from
this function.
So this is a safe conversion to make walk_revs_populate_todo()
callable from new callers that want it not to die, without changing
the external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The only two callers of do_pick_commit(), pick_commits() and
single_pick() already check the return value and pass it on to their
callers, so their callers must be already prepared to handle error
returns, and with this step, we make it notice an error return from
this function.
So this is a safe conversion to make do_pick_commit() callable from
new callers that want it not to die, without changing the external
behaviour of anything existing.
While at it, remove the superfluous space.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The only caller of do_recursive_merge(), do_pick_commit() already
checks the return value and passes it on to its callers, so its caller
must be already prepared to handle error returns, and with this step,
we make it notice an error return from this function.
So this is a safe conversion to make do_recursive_merge() callable
from new callers that want it not to die, without changing the
external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The only caller of write_message(), do_pick_commit() already checks
the return value and passes it on to its callers, so its caller must
be already prepared to handle error returns, and with this step, we
make it notice an error return from this function.
So this is a safe conversion to make write_message() callable
from new callers that want it not to die, without changing the
external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain
notice the error and handle it (by dying, still).
The eventual caller of do_pick_commit() is sequencer_pick_revisions(),
which already relays a reported error from its helper functions
(including this one), and both of its two callers know how to react to
a negative return correctly.
So this makes do_pick_commit() callable from new callers that want it
not to die, without changing the external behaviour of anything
existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Instead of dying there, let the caller high up in the callchain notice
the error and handle it (by dying, still).
The function sequencer_pick_revisions() has only two callers,
cmd_revert() and cmd_cherry_pick(), both of which check the return
value and react appropriately upon errors.
So this is a safe conversion to make sequencer_pick_revisions()
callable from new callers that want it not to die, without changing
the external behaviour of anything existing.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This topic branch fixes a segmentation fault when using `-G` or `-S
--pickaxe-regex` with `git diff` on new-born files that are configured
without user diff drivers, and that hence get mmap()ed into memory.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
In the codepath that comes up with the hostname to be used in an
e-mail when the user didn't tell us, we looked at ai_canonname
field in struct addrinfo without making sure it is not NULL first.
* jk/ident-ai-canonname-could-be-null:
ident: handle NULL ai_canonname
Documentation around tools to import from CVS was fairly outdated.
* jk/doc-cvs-update:
docs/cvs-migration: mention cvsimport caveats
docs/cvs-migration: update link to cvsps homepage
docs/cvsimport: prefer cvs-fast-export to parsecvs
"git pack-objects --include-tag" was taught that when we know that
we are sending an object C, we want a tag B that directly points at
C but also a tag A that points at the tag B. We used to miss the
intermediate tag B in some cases.
* jk/pack-tag-of-tag:
pack-objects: walk tag chains for --include-tag
t5305: simplify packname handling
t5305: use "git -C"
t5305: drop "dry-run" of unpack-objects
t5305: move cleanup into test block
When calling `Repository>Create Desktop Shortcut`, Git GUI assumes
that it is okay to call `wish.exe` directly on Windows. However, in
Git for Windows 2.x' context, that leaves several crucial environment
variables uninitialized, resulting in a shortcut that does not work.
To fix those environment variable woes, Git for Windows comes with a
convenient `git-gui.exe`, so let's just use it when it is available.
This fixes https://github.com/git-for-windows/git/issues/448
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
MSys2 might *look* like Cygwin, but it is *not* Cygwin... Unless it
is run with `MSYSTEM=MSYS`, that is.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
"git add --chmod=+x <pathspec>" added recently only toggled the
executable bit for paths that are either new or modified. This has
been corrected to flip the executable bit for all paths that match
the given pathspec.
* tg/add-chmod+x-fix:
t3700-add: do not check working tree file mode without POSIXPERM
t3700-add: create subdirectory gently
add: modify already added files when --chmod is given
read-cache: introduce chmod_index_entry
update-index: add test for chmod flags
When "git rebase -i" is given a broken instruction, it told the
user to fix it with "--edit-todo", but didn't say what the step
after that was (i.e. "--continue").
* rt/rebase-i-broken-insn-advise:
rebase -i: improve advice on bad instruction lines
The procedure to build Git on Mac OS X for Travis CI hardcoded the
internal directory structure we assumed HomeBrew uses, which was a
no-no. The procedure has been updated to ask HomeBrew things we
need to know to fix this.
* ls/travis-homebrew-path-fix:
travis-ci: ask homebrew for its path instead of hardcoding it
Some codepaths in "git diff" used regexec(3) on a buffer that was
mmap(2)ed, which may not have a terminating NUL, leading to a read
beyond the end of the mapped region. This was fixed by introducing
a regexec_buf() helper that takes a <ptr,len> pair with REG_STARTEND
extension.
* js/regexec-buf:
regex: use regexec_buf()
regex: add regexec_buf() that can work on a non NUL-terminated string
regex: -G<pattern> feeds a non NUL-terminated string to regexec() and fails
"git checkout <word>" does not follow the usual disambiguation
rules when the <word> can be both a rev and a path, to allow
checking out a branch 'foo' in a project that happens to have a
file 'foo' in the working tree without having to disambiguate.
This was poorly documented and the check was incorrect when the
command was run from a subdirectory.
* nd/checkout-disambiguation:
checkout: fix ambiguity check in subdir
checkout.txt: document a common case that ignores ambiguation rules
checkout: add some spaces between code and comment
