diff --git a/Documentation/RelNotes-1.5.3.txt b/Documentation/RelNotes-1.5.3.txt
index d111661a7b..ef2f95b3c5 100644
--- a/Documentation/RelNotes-1.5.3.txt
+++ b/Documentation/RelNotes-1.5.3.txt
@@ -1,4 +1,4 @@
-GIT v1.5.3 Release Notes (draft)
+GIT v1.5.3 Release Notes
 ========================
 
 Updates since v1.5.2
@@ -10,8 +10,23 @@ Updates since v1.5.2
 * Thee are a handful pack-objects changes to help you cope better with
   repositories with pathologically large blobs in them.
 
+* For people who need to import from Perforce, a front-end for
+  fast-import is in contrib/fast-import/ now.
+
+* Comes with git-gui 0.8.0.
+
+* Comes with updated gitk.
+
 * New commands and options.
 
+  - "git log" learned a new option '--follow', to follow
+    renaming history of a single file.
+
+  - "git-filter-branch" is a reborn cg-admin-rewritehist.
+
+  - "git-cvsserver" learned new options (--base-path, --export-all,
+    --strict-paths) inspired by git-daemon.
+
   - "git-submodule" command helps you manage the projects from
     the superproject that contain them.
 
@@ -36,9 +51,45 @@ Updates since v1.5.2
   - "git repack" can be told to split resulting packs to avoid
     exceeding limit specified with "--max-pack-size".
 
+  - "git fsck" gained --verbose option.  This is really really
+    verbose but it might help you identify exact commit that is
+    corrupt in your repository.
+
+  - "git format-patch" learned --numbered-files option.  This
+    may be useful for MH users.
+
+  - "git tag -n -l" shows tag annotations while listing tags.
+
+  - "git cvsimport" can optionally use the separate-remote layout.
+
+  - "git blame" can be told to see through commits that changes
+    whitespaces and indentation levels with "-w" option.
+
+  - "git send-email" can be told not to thread the messages when
+    sending out more than one patches.
+
+  - "git config" learned NUL terminated output format via -z to
+    help scripts.
+
 * Updated behavior of existing commands.
 
-  - "git push" pretends that you immediately fetched back from
+  - "git mergetool" chooses its backend more wisely, taking
+    notice of its environment such as use of X, Gnome/KDE, etc.
+
+  - "gitweb" shows merge commits a lot nicer than before.  The
+    default view uses more compact --cc format, while the UI
+    allows to choose normal diff with any parent.
+
+  - snapshot files "gitweb" creates from a repository at
+    $path/$project/.git are more useful.  We use $project part
+    in the filename, which we used to discard.
+
+  - "git cvsimort" creates lightweight tag; there is not any
+    interesting information we can record in an annotated tag,
+    and the handcrafted ones the old code created was not
+    properly formed anyway.
+
+  - "git-push" pretends that you immediately fetched back from
     the remote by updating corresponding remote tracking
     branches if you have any.
 
@@ -48,17 +99,25 @@ Updates since v1.5.2
   - "git-apply --whitespace=strip" removes blank lines added at
     the end of the file.
 
-  - fetch over git native protocols with -v shows connection
+  - "git-fetch" over git native protocols with -v shows connection
     status, and the IP address of the other end, to help
     diagnosing problems.
 
-  - core.legacyheaders is no more, although we still can read
-    objects created in a new loose object format.
+  - We used to have core.legacyheaders configuration, when
+    set to false, allowed git to write loose objects in a format
+    that mimicks the format used by objects stored in packs.  It
+    turns out that this was not so useful.  Although we will
+    continue to read objects written in that format, we do not
+    honor that configuration anymore and create loose objects in
+    the legacy/traditional format.
+
+  - "--find-copies-harder" option to diff family can now be
+    spelled as "-C -C" for brevity.
 
   - "git-mailsplit" (hence "git-am") can read from Maildir
     formatted mailboxes.
 
-  - "git cvsserver" does not barf upon seeing "cvs login"
+  - "git-cvsserver" does not barf upon seeing "cvs login"
     request.
 
   - "pack-objects" honors "delta" attribute set in
@@ -68,10 +127,25 @@ Updates since v1.5.2
   - new-workdir script (in contrib) can now be used with a bare
     repository.
 
+  - "git-mergetool" learned to use gvimdiff.
+
+  - "gitview" (in contrib) has a better blame interface.
+
+  - "git log" and friends did not handle a commit log message
+    that is larger than 16kB; they do now.
+
+  - "--pretty=oneline" output format for "git log" and friends
+    deals with "malformed" commit log messages that have more
+    than one lines in the first paragraph better.  We used to
+    show the first line, cutting the title at mid-sentence; we
+    concatenate them into a single line and treat the result as
+    "oneline".
 
 * Builds
 
-  -
+  - old-style function definitions (most notably, a function
+    without parameter defined with "func()", not "func(void)")
+    have been eradicated.
 
 * Performance Tweaks
 
@@ -88,6 +162,10 @@ Updates since v1.5.2
     the object requested the last time, which exploits the
     locality of references.
 
+  - verifying pack contents done by "git fsck --full" got boost
+    by carefully choosing the order to verify objects in them.
+
+
 Fixes since v1.5.2
 ------------------
 
@@ -96,14 +174,11 @@ this release, unless otherwise noted.
 
 * Bugfixes
 
-  - ....  This has not
-    been backported to 1.5.2.x series, as it is rather an
-    intrusive change.
-
+  - "gitweb" had trouble handling non UTF-8 text with older
+    Encode.pm Perl module.
 
 --
 exec >/var/tmp/1
-O=v1.5.2-45-ged82edc
-O=v1.5.2-172-g1a8b769
+O=v1.5.2.2-603-g7c85173
 echo O=`git describe refs/heads/master`
 git shortlog --no-merges $O..refs/heads/master ^refs/heads/maint
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 2c2476ef58..51bfc14805 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -172,6 +172,13 @@ repository that ends in "/.git" is assumed to be not bare (bare =
 false), while all other repositories are assumed to be bare (bare
 = true).
 
+core.worktree::
+	Set the path to the working tree.  The value will not be
+	used in combination with repositories found automatically in
+	a .git directory (i.e. $GIT_DIR is not set).
+	This can be overriden by the GIT_WORK_TREE environment
+	variable and the '--work-tree' command line option.
+
 core.logAllRefUpdates::
 	Updates to a ref <ref> is logged to the file
 	"$GIT_DIR/logs/<ref>", by appending the new and old
diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
index a445781664..5f66a7fcd5 100644
--- a/Documentation/git-config.txt
+++ b/Documentation/git-config.txt
@@ -9,9 +9,9 @@ git-config - Get and set repository or global options
 SYNOPSIS
 --------
 [verse]
-'git-config' [--system | --global] [-z|--null] name [value [value_regex]]
-'git-config' [--system | --global] --add name value
-'git-config' [--system | --global] --replace-all name [value [value_regex]]
+'git-config' [--system | --global] [type] [-z|--null] name [value [value_regex]]
+'git-config' [--system | --global] [type] --add name value
+'git-config' [--system | --global] [type] --replace-all name [value [value_regex]]
 'git-config' [--system | --global] [type] [-z|--null] --get name [value_regex]
 'git-config' [--system | --global] [type] [-z|--null] --get-all name [value_regex]
 'git-config' [--system | --global] [type] [-z|--null] --get-regexp name_regex [value_regex]
@@ -37,8 +37,7 @@ prepend a single exclamation mark in front (see also <<EXAMPLES>>).
 The type specifier can be either '--int' or '--bool', which will make
 'git-config' ensure that the variable(s) are of the given type and
 convert the value to the canonical form (simple decimal number for int,
-a "true" or "false" string for bool).  Type specifiers currently only
-take effect for reading operations.  If no type specifier is passed,
+a "true" or "false" string for bool).  If no type specifier is passed,
 no checks or transformations are performed on the value.
 
 This command will fail if:
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 87771b832b..eea9c9cfe9 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -90,8 +90,15 @@ OPTIONS
 	Show `$GIT_DIR` if defined else show the path to the .git directory.
 
 --is-inside-git-dir::
-	Return "true" if we are in the git directory, otherwise "false".
-	Some commands require to be run in a working directory.
+	When the current working directory is below the repository
+	directory print "true", otherwise "false".
+
+--is-inside-work-tree::
+	When the current working directory is inside the work tree of the
+	repository print "true", otherwise "false".
+
+--is-bare-repository::
+	When the repository is bare print "true", otherwise "false".
 
 --short, --short=number::
 	Instead of outputting the full SHA1 values of object names try to
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 20b5b7bb48..2cc0b214d2 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -10,7 +10,8 @@ SYNOPSIS
 --------
 [verse]
 'git' [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate]
-    [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]
+    [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]
+    [--help] COMMAND [ARGS]
 
 DESCRIPTION
 -----------
@@ -103,6 +104,14 @@ OPTIONS
 	Set the path to the repository. This can also be controlled by
 	setting the GIT_DIR environment variable.
 
+--work-tree=<path>::
+	Set the path to the working tree.  The value will not be
+	used in combination with repositories found automatically in
+	a .git directory (i.e. $GIT_DIR is not set).
+	This can also be controlled by setting the GIT_WORK_TREE
+	environment variable and the core.worktree configuration
+	variable.
+
 --bare::
 	Same as --git-dir=`pwd`.
 
@@ -347,6 +356,13 @@ git so take care if using Cogito etc.
 	specifies a path to use instead of the default `.git`
 	for the base of the repository.
 
+'GIT_WORK_TREE'::
+	Set the path to the working tree.  The value will not be
+	used in combination with repositories found automatically in
+	a .git directory (i.e. $GIT_DIR is not set).
+	This can also be controlled by the '--work-tree' command line
+	option and the core.worktree configuration variable.
+
 git Commits
 ~~~~~~~~~~~
 'GIT_AUTHOR_NAME'::
@@ -396,6 +412,16 @@ other
 'GIT_PAGER'::
 	This environment variable overrides `$PAGER`.
 
+'GIT_FLUSH'::
+	If this environment variable is set to "1", then commands such
+	as git-blame (in incremental mode), git-rev-list, git-log,
+	git-whatchanged, etc., will force a flush of the output stream
+	after each commit-oriented record have been flushed.   If this
+	variable is set to "0", the output of these commands will be done
+	using completely buffered I/O.   If this environment variable is
+	not set, git will choose buffered or record-oriented flushing
+	based on whether stdout appears to be redirected to a file or not.
+
 'GIT_TRACE'::
 	If this variable is set to "1", "2" or "true" (comparison
 	is case insensitive), git will print `trace:` messages on
diff --git a/builtin-blame.c b/builtin-blame.c
index f7e2c13885..da23a6f9c9 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -1459,6 +1459,7 @@ static void found_guilty_entry(struct blame_entry *ent)
 				printf("boundary\n");
 		}
 		write_filename_info(suspect->path);
+		maybe_flush_or_die(stdout, "stdout");
 	}
 }
 
diff --git a/builtin-config.c b/builtin-config.c
index 8ad08b97dd..b5e4e6c291 100644
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -138,9 +138,33 @@ free_strings:
 	return ret;
 }
 
+char *normalize_value(const char *key, const char *value)
+{
+	char *normalized;
+
+	if (!value)
+		return NULL;
+
+	if (type == T_RAW)
+		normalized = xstrdup(value);
+	else {
+		normalized = xmalloc(64);
+		if (type == T_INT) {
+			int v = git_config_int(key, value);
+			sprintf(normalized, "%d", v);
+		}
+		else if (type == T_BOOL)
+			sprintf(normalized, "%s",
+				git_config_bool(key, value) ? "true" : "false");
+	}
+
+	return normalized;
+}
+
 int cmd_config(int argc, const char **argv, const char *prefix)
 {
 	int nongit = 0;
+	char* value;
 	setup_git_directory_gently(&nongit);
 
 	while (1 < argc) {
@@ -217,9 +241,10 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			use_key_regexp = 1;
 			do_all = 1;
 			return get_value(argv[2], NULL);
-		} else
-
-			return git_config_set(argv[1], argv[2]);
+		} else {
+			value = normalize_value(argv[1], argv[2]);
+			return git_config_set(argv[1], value);
+		}
 	case 4:
 		if (!strcmp(argv[1], "--unset"))
 			return git_config_set_multivar(argv[2], NULL, argv[3], 0);
@@ -235,17 +260,21 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			use_key_regexp = 1;
 			do_all = 1;
 			return get_value(argv[2], argv[3]);
-		} else if (!strcmp(argv[1], "--add"))
-			return git_config_set_multivar(argv[2], argv[3], "^$", 0);
-		else if (!strcmp(argv[1], "--replace-all"))
-
-			return git_config_set_multivar(argv[2], argv[3], NULL, 1);
-		else
-
-			return git_config_set_multivar(argv[1], argv[2], argv[3], 0);
+		} else if (!strcmp(argv[1], "--add")) {
+			value = normalize_value(argv[2], argv[3]);
+			return git_config_set_multivar(argv[2], value, "^$", 0);
+		} else if (!strcmp(argv[1], "--replace-all")) {
+			value = normalize_value(argv[2], argv[3]);
+			return git_config_set_multivar(argv[2], value, NULL, 1);
+		} else {
+			value = normalize_value(argv[1], argv[2]);
+			return git_config_set_multivar(argv[1], value, argv[3], 0);
+		}
 	case 5:
-		if (!strcmp(argv[1], "--replace-all"))
-			return git_config_set_multivar(argv[2], argv[3], argv[4], 1);
+		if (!strcmp(argv[1], "--replace-all")) {
+			value = normalize_value(argv[2], argv[3]);
+			return git_config_set_multivar(argv[2], value, argv[4], 1);
+		}
 	case 1:
 	default:
 		usage(git_config_set_usage);
diff --git a/builtin-ls-files.c b/builtin-ls-files.c
index 5398a41415..61577ea13f 100644
--- a/builtin-ls-files.c
+++ b/builtin-ls-files.c
@@ -470,7 +470,7 @@ int cmd_ls_files(int argc, const char **argv, const char *prefix)
 	}
 
 	if (require_work_tree &&
-			(is_bare_repository() || is_inside_git_dir()))
+			(!is_inside_work_tree() || is_inside_git_dir()))
 		die("This operation must be run in a work tree");
 
 	pathspec = get_pathspec(prefix, argv + i);
diff --git a/builtin-rev-list.c b/builtin-rev-list.c
index 813aadf596..86db8b03fe 100644
--- a/builtin-rev-list.c
+++ b/builtin-rev-list.c
@@ -100,7 +100,7 @@ static void show_commit(struct commit *commit)
 		printf("%s%c", buf, hdr_termination);
 		free(buf);
 	}
-	fflush(stdout);
+	maybe_flush_or_die(stdout, "stdout");
 	if (commit->parents) {
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index 37addb25fa..497903a85a 100644
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -352,6 +352,16 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 						: "false");
 				continue;
 			}
+			if (!strcmp(arg, "--is-inside-work-tree")) {
+				printf("%s\n", is_inside_work_tree() ? "true"
+						: "false");
+				continue;
+			}
+			if (!strcmp(arg, "--is-bare-repository")) {
+				printf("%s\n", is_bare_repository() ? "true"
+						: "false");
+				continue;
+			}
 			if (!prefixcmp(arg, "--since=")) {
 				show_datestring("--max-age=", arg+8);
 				continue;
diff --git a/builtin-stripspace.c b/builtin-stripspace.c
index 62bd4b547b..d8358e28f0 100644
--- a/builtin-stripspace.c
+++ b/builtin-stripspace.c
@@ -1,58 +1,79 @@
 #include "builtin.h"
+#include "cache.h"
 
 /*
- * Remove empty lines from the beginning and end.
+ * Remove trailing spaces from a line.
  *
- * Turn multiple consecutive empty lines into just one
- * empty line.  Return true if it is an incomplete line.
+ * If the line ends with newline, it will be removed too.
+ * Returns the new length of the string.
  */
-static int cleanup(char *line)
+static int cleanup(char *line, int len)
 {
-	int len = strlen(line);
+	if (len) {
+		if (line[len - 1] == '\n')
+			len--;
 
-	if (len && line[len-1] == '\n') {
-		if (len == 1)
-			return 0;
-		do {
-			unsigned char c = line[len-2];
+		while (len) {
+			unsigned char c = line[len - 1];
 			if (!isspace(c))
 				break;
-			line[len-2] = '\n';
 			len--;
-			line[len] = 0;
-		} while (len > 1);
-		return 0;
+		}
+		line[len] = 0;
 	}
-	return 1;
+	return len;
 }
 
-static void stripspace(FILE *in, FILE *out)
+/*
+ * Remove empty lines from the beginning and end
+ * and also trailing spaces from every line.
+ *
+ * Turn multiple consecutive empty lines between paragraphs
+ * into just one empty line.
+ *
+ * If the input has only empty lines and spaces,
+ * no output will be produced.
+ *
+ * Enable skip_comments to skip every line starting with "#".
+ */
+void stripspace(FILE *in, FILE *out, int skip_comments)
 {
 	int empties = -1;
-	int incomplete = 0;
-	char line[1024];
+	int alloc = 1024;
+	char *line = xmalloc(alloc);
 
-	while (fgets(line, sizeof(line), in)) {
-		incomplete = cleanup(line);
+	while (fgets(line, alloc, in)) {
+		int len = strlen(line);
+
+		while (len == alloc - 1 && line[len - 1] != '\n') {
+			alloc = alloc_nr(alloc);
+			line = xrealloc(line, alloc);
+			fgets(line + len, alloc - len, in);
+			len += strlen(line + len);
+		}
+
+		if (skip_comments && line[0] == '#')
+			continue;
+		len = cleanup(line, len);
 
 		/* Not just an empty line? */
-		if (line[0] != '\n') {
+		if (len) {
 			if (empties > 0)
 				fputc('\n', out);
 			empties = 0;
 			fputs(line, out);
+			fputc('\n', out);
 			continue;
 		}
 		if (empties < 0)
 			continue;
 		empties++;
 	}
-	if (incomplete)
-		fputc('\n', out);
+	free(line);
 }
 
 int cmd_stripspace(int argc, const char **argv, const char *prefix)
 {
-	stripspace(stdin, stdout);
+	stripspace(stdin, stdout, 0);
 	return 0;
 }
diff --git a/builtin.h b/builtin.h
index da4834c312..661a92f787 100644
--- a/builtin.h
+++ b/builtin.h
@@ -7,6 +7,7 @@ extern const char git_version_string[];
 extern const char git_usage_string[];
 
 extern void help_unknown_cmd(const char *cmd);
+extern void stripspace(FILE *in, FILE *out, int skip_comments);
 extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix);
 extern void prune_packed_objects(int);
 
diff --git a/cache.h b/cache.h
index 48d330b0d5..6709bc62a6 100644
--- a/cache.h
+++ b/cache.h
@@ -192,6 +192,7 @@ enum object_type {
 };
 
 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
+#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
@@ -207,6 +208,7 @@ enum object_type {
 extern int is_bare_repository_cfg;
 extern int is_bare_repository(void);
 extern int is_inside_git_dir(void);
+extern int is_inside_work_tree(void);
 extern const char *get_git_dir(void);
 extern char *get_object_directory(void);
 extern char *get_refs_directory(void);
@@ -534,6 +536,8 @@ extern char git_default_name[MAX_GITNAME];
 extern const char *git_commit_encoding;
 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 read_in_full(int fd, void *buf, size_t count);
 extern int write_in_full(int fd, const void *buf, size_t count);
diff --git a/connect.c b/connect.c
index 2f1c51c59d..233107cb65 100644
--- a/connect.c
+++ b/connect.c
@@ -593,6 +593,7 @@ pid_t git_connect(int fd[2], char *url, const char *prog, int flags)
 		env_unsetenv(env, ALTERNATE_DB_ENVIRONMENT);
 		env_unsetenv(env, DB_ENVIRONMENT);
 		env_unsetenv(env, GIT_DIR_ENVIRONMENT);
+		env_unsetenv(env, GIT_WORK_TREE_ENVIRONMENT);
 		env_unsetenv(env, GRAFT_ENVIRONMENT);
 		env_unsetenv(env, INDEX_ENVIRONMENT);
 		pid = spawnvpe_pipe("sh", argv, env, pipefd[1], pipefd[0]);
diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index 8fa5ce6467..a2fcebc1c6 100644
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -312,9 +312,10 @@ case "$GIT_DIR" in
 /*)
 	;;
 *)
-	export GIT_DIR="$(pwd)/../../$GIT_DIR"
+	GIT_DIR="$(pwd)/../../$GIT_DIR"
 	;;
 esac
+export GIT_DIR GIT_WORK_TREE=.
 
 export GIT_INDEX_FILE="$(pwd)/../index"
 git-read-tree # seed the index file
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index f24c7f2d23..0de49e8459 100755
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -29,11 +29,7 @@ set_reflog_action() {
 }
 
 is_bare_repository () {
-	git-config --bool --get core.bare ||
-	case "$GIT_DIR" in
-	.git | */.git) echo false ;;
-	*) echo true ;;
-	esac
+	git-rev-parse --is-bare-repository
 }
 
 cd_to_toplevel () {
@@ -48,7 +44,7 @@ cd_to_toplevel () {
 }
 
 require_work_tree () {
-	test $(is_bare_repository) = false &&
+	test $(git-rev-parse --is-inside-work-tree) = true &&
 	test $(git-rev-parse --is-inside-git-dir) = false ||
 	die "fatal: $0 cannot be used without a working tree."
 }
diff --git a/git-svn.perl b/git-svn.perl
index 50128d7285..03d5e2d979 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -596,8 +596,7 @@ sub post_fetch_checkout {
 	my $index = $ENV{GIT_INDEX_FILE} || "$ENV{GIT_DIR}/index";
 	return if -f $index;
 
-	chomp(my $bare = `git config --bool --get core.bare`);
-	return if $bare eq 'true';
+	return if command_oneline(qw/rev-parse --is-inside-work-tree/) eq 'false';
 	return if command_oneline(qw/rev-parse --is-inside-git-dir/) eq 'true';
 	command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
 	print STDERR "Checked out HEAD:\n  ",
@@ -787,12 +786,12 @@ sub read_repo_config {
 
 sub extract_metadata {
 	my $id = shift or return (undef, undef, undef);
-	my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+)
+	my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
 							\s([a-f\d\-]+)$/x);
 	if (!defined $rev || !$uuid || !$url) {
 		# some of the original repositories I made had
 		# identifiers like this:
-		($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+)\@([a-f\d\-]+)/);
+		($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/);
 	}
 	return ($url, $rev, $uuid);
 }
@@ -804,20 +803,29 @@ sub cmt_metadata {
 
 sub working_head_info {
 	my ($head, $refs) = @_;
-	my ($fh, $ctx) = command_output_pipe('rev-list', $head);
-	while (my $hash = <$fh>) {
-		chomp($hash);
-		my ($url, $rev, $uuid) = cmt_metadata($hash);
+	my ($fh, $ctx) = command_output_pipe('log', $head);
+	my $hash;
+	my %max;
+	while (<$fh>) {
+		if ( m{^commit ($::sha1)$} ) {
+			unshift @$refs, $hash if $hash and $refs;
+			$hash = $1;
+			next;
+		}
+		next unless s{^\s*(git-svn-id:)}{$1};
+		my ($url, $rev, $uuid) = extract_metadata($_);
 		if (defined $url && defined $rev) {
+			next if $max{$url} and $max{$url} < $rev;
 			if (my $gs = Git::SVN->find_by_url($url)) {
 				my $c = $gs->rev_db_get($rev);
 				if ($c && $c eq $hash) {
 					close $fh; # break the pipe
 					return ($url, $rev, $uuid, $gs);
+				} else {
+					$max{$url} ||= $gs->rev_db_max;
 				}
 			}
 		}
-		unshift @$refs, $hash if $refs;
 	}
 	command_close_pipe($fh, $ctx);
 	(undef, undef, undef, undef);
@@ -1966,16 +1974,19 @@ sub rebuild {
 		return;
 	}
 	print "Rebuilding $db_path ...\n";
-	my ($rev_list, $ctx) = command_output_pipe("rev-list", $self->refname);
+	my ($log, $ctx) = command_output_pipe("log", $self->refname);
 	my $latest;
 	my $full_url = $self->full_url;
 	remove_username($full_url);
 	my $svn_uuid;
-	while (<$rev_list>) {
-		chomp;
-		my $c = $_;
-		die "Non-SHA1: $c\n" unless $c =~ /^$::sha1$/o;
-		my ($url, $rev, $uuid) = ::cmt_metadata($c);
+	my $c;
+	while (<$log>) {
+		if ( m{^commit ($::sha1)$} ) {
+			$c = $1;
+			next;
+		}
+		next unless s{^\s*(git-svn-id:)}{$1};
+		my ($url, $rev, $uuid) = ::extract_metadata($_);
 		remove_username($url);
 
 		# ignore merges (from set-tree)
@@ -1993,7 +2004,7 @@ sub rebuild {
 		$self->rev_db_set($rev, $c);
 		print "r$rev = $c\n";
 	}
-	command_close_pipe($rev_list, $ctx);
+	command_close_pipe($log, $ctx);
 	print "Done rebuilding $db_path\n";
 }
 
@@ -2925,6 +2936,7 @@ sub new {
 	    SVN::Client::get_ssl_server_trust_file_provider(),
 	    SVN::Client::get_simple_prompt_provider(
 	      \&Git::SVN::Prompt::simple, 2),
+	    SVN::Client::get_ssl_client_cert_file_provider(),
 	    SVN::Client::get_ssl_client_cert_prompt_provider(
 	      \&Git::SVN::Prompt::ssl_client_cert, 2),
 	    SVN::Client::get_ssl_client_cert_pw_prompt_provider(
diff --git a/git-tag.sh b/git-tag.sh
old mode 100644
new mode 100755
index 3bdf5be01c..8e1416ffff
--- a/git-tag.sh
+++ b/git-tag.sh
@@ -19,28 +19,40 @@ do
     case "$1" in
     -a)
 	annotate=1
+	shift
 	;;
     -s)
 	annotate=1
 	signed=1
+	shift
 	;;
     -f)
 	force=1
+	shift
 	;;
     -n)
-        case $2 in
-	-*)	LINES=1 	# no argument
+        case "$#,$2" in
+	1,* | *,-*)
+		LINES=1 	# no argument
 		;;
 	*)	shift
 		LINES=$(expr "$1" : '\([0-9]*\)')
 		[ -z "$LINES" ] && LINES=1 # 1 line is default when -n is used
 		;;
 	esac
+	shift
 	;;
     -l)
 	list=1
 	shift
-	PATTERN="$1"	# select tags by shell pattern, not re
+	case $# in
+	0)	PATTERN=
+		;;
+	*)
+		PATTERN="$1"	# select tags by shell pattern, not re
+		shift
+		;;
+	esac
 	git rev-parse --symbolic --tags | /usr/bin/sort |
 	    while read TAG
 	    do
@@ -51,12 +63,16 @@ do
 		[ "$LINES" -le 0 ] && { echo "$TAG"; continue ;}
 		OBJTYPE=$(git cat-file -t "$TAG")
 		case $OBJTYPE in
-		tag)	ANNOTATION=$(git cat-file tag "$TAG" |
-				       sed -e '1,/^$/d' \
-					   -e '/^-----BEGIN PGP SIGNATURE-----$/Q' )
-			printf "%-15s %s\n" "$TAG" "$ANNOTATION" |
-			  sed -e '2,$s/^/    /' \
-			      -e "${LINES}q"
+		tag)
+			ANNOTATION=$(git cat-file tag "$TAG" |
+				sed -e '1,/^$/d' |
+				sed -n -e "
+					/^-----BEGIN PGP SIGNATURE-----\$/q
+					2,\$s/^/    /
+					p
+					${LINES}q
+				")
+			printf "%-15s %s\n" "$TAG" "$ANNOTATION"
 			;;
 		*)      echo "$TAG"
 			;;
@@ -70,7 +86,9 @@ do
 	if test "$#" = "0"; then
 	    die "error: option -m needs an argument"
 	else
+	    message="$1"
 	    message_given=1
+	    shift
 	fi
 	;;
     -F)
@@ -81,13 +99,19 @@ do
 	else
 	    message="$(cat "$1")"
 	    message_given=1
+	    shift
 	fi
 	;;
     -u)
 	annotate=1
 	signed=1
 	shift
-	username="$1"
+	if test "$#" = "0"; then
+	    die "error: option -u needs an argument"
+	else
+	    username="$1"
+	    shift
+	fi
 	;;
     -d)
 	shift
@@ -122,7 +146,6 @@ do
 	break
 	;;
     esac
-    shift
 done
 
 [ -n "$list" ] && exit 0
diff --git a/git-verify-tag.sh b/git-verify-tag.sh
index f2d5597dba..68858b694d 100755
--- a/git-verify-tag.sh
+++ b/git-verify-tag.sh
@@ -37,8 +37,9 @@ esac
 trap 'rm -f "$GIT_DIR/.tmp-vtag"' 0
 
 git-cat-file tag "$1" >"$GIT_DIR/.tmp-vtag" || exit 1
-
-cat "$GIT_DIR/.tmp-vtag" |
-sed '/-----BEGIN PGP/Q' |
+sed -n -e '
+	/^-----BEGIN PGP SIGNATURE-----$/q
+	p
+' <"$GIT_DIR/.tmp-vtag" |
 gpg --verify "$GIT_DIR/.tmp-vtag" - || exit 1
 rm -f "$GIT_DIR/.tmp-vtag"
diff --git a/git.c b/git.c
index 690bf37f38..00b520e326 100644
--- a/git.c
+++ b/git.c
@@ -4,7 +4,7 @@
 #include "quote.h"
 
 const char git_usage_string[] =
-	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]";
+	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
 
 static void prepend_to_path(const char *dir, int len)
 {
@@ -32,7 +32,7 @@ static void prepend_to_path(const char *dir, int len)
 	free(path);
 }
 
-static int handle_options(const char*** argv, int* argc)
+static int handle_options(const char*** argv, int* argc, int* envchanged)
 {
 	int handled = 0;
 
@@ -68,14 +68,34 @@ static int handle_options(const char*** argv, int* argc)
 				usage(git_usage_string);
 			}
 			setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
+			if (envchanged)
+				*envchanged = 1;
 			(*argv)++;
 			(*argc)--;
 			handled++;
 		} else if (!prefixcmp(cmd, "--git-dir=")) {
 			setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
+			if (envchanged)
+				*envchanged = 1;
+		} else if (!strcmp(cmd, "--work-tree")) {
+			if (*argc < 2) {
+				fprintf(stderr, "No directory given for --work-tree.\n" );
+				usage(git_usage_string);
+			}
+			setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
+			if (envchanged)
+				*envchanged = 1;
+			(*argv)++;
+			(*argc)--;
+		} else if (!prefixcmp(cmd, "--work-tree=")) {
+			setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
+			if (envchanged)
+				*envchanged = 1;
 		} else if (!strcmp(cmd, "--bare")) {
 			static char git_dir[PATH_MAX+1];
 			setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 1);
+			if (envchanged)
+				*envchanged = 1;
 		} else {
 			fprintf(stderr, "Unknown option: %s\n", cmd);
 			usage(git_usage_string);
@@ -154,7 +174,7 @@ static int split_cmdline(char *cmdline, const char ***argv)
 
 static int handle_alias(int *argcp, const char ***argv)
 {
-	int nongit = 0, ret = 0, saved_errno = errno;
+	int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno;
 	const char *subdir;
 	int count, option_count;
 	const char** new_argv;
@@ -175,7 +195,11 @@ static int handle_alias(int *argcp, const char ***argv)
 			    alias_string + 1, alias_command);
 		}
 		count = split_cmdline(alias_string, &new_argv);
-		option_count = handle_options(&new_argv, &count);
+		option_count = handle_options(&new_argv, &count, &envchanged);
+		if (envchanged)
+			die("alias '%s' changes environment variables\n"
+				 "You can use '!git' in the alias to do this.",
+				 alias_command);
 		memmove(new_argv - option_count, new_argv,
 				count * sizeof(char *));
 		new_argv -= option_count;
@@ -218,17 +242,56 @@ const char git_version_string[] = GIT_VERSION;
  * require working tree to be present -- anything uses this needs
  * RUN_SETUP for reading from the configuration file.
  */
-#define NOT_BARE 	(1<<2)
+#define NEED_WORK_TREE	(1<<2)
 
-static void handle_internal_command(int argc, const char **argv, char **envp)
+struct cmd_struct {
+	const char *cmd;
+	int (*fn)(int, const char **, const char *);
+	int option;
+};
+
+static int run_command(struct cmd_struct *p, int argc, const char **argv)
+{
+	int status;
+	struct stat st;
+	const char *prefix;
+
+	prefix = NULL;
+	if (p->option & RUN_SETUP)
+		prefix = setup_git_directory();
+	if (p->option & USE_PAGER)
+		setup_pager();
+	if ((p->option & NEED_WORK_TREE) &&
+	    (!is_inside_work_tree() || is_inside_git_dir()))
+		die("%s must be run in a work tree", p->cmd);
+	trace_argv_printf(argv, argc, "trace: built-in: git");
+
+	status = p->fn(argc, argv, prefix);
+	if (status)
+		return status;
+
+	/* Somebody closed stdout? */
+	if (fstat(fileno(stdout), &st))
+		return 0;
+	/* Ignore write errors for pipes and sockets.. */
+	if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
+		return 0;
+
+	/* Check for ENOSPC and EIO errors.. */
+	if (fflush(stdout))
+		die("write failure on standard output: %s", strerror(errno));
+	if (ferror(stdout))
+		die("unknown write failure on standard output");
+	if (fclose(stdout))
+		die("close failed on standard output: %s", strerror(errno));
+	return 0;
+}
+
+static void handle_internal_command(int argc, const char **argv)
 {
 	const char *cmd = argv[0];
-	static struct cmd_struct {
-		const char *cmd;
-		int (*fn)(int, const char **, const char *);
-		int option;
-	} commands[] = {
-		{ "add", cmd_add, RUN_SETUP | NOT_BARE },
+	static struct cmd_struct commands[] = {
+		{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 		{ "annotate", cmd_annotate, RUN_SETUP | USE_PAGER },
 		{ "apply", cmd_apply },
 		{ "archive", cmd_archive },
@@ -238,9 +301,9 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "cat-file", cmd_cat_file, RUN_SETUP },
 		{ "checkout-index", cmd_checkout_index, RUN_SETUP },
 		{ "check-ref-format", cmd_check_ref_format },
-		{ "check-attr", cmd_check_attr, RUN_SETUP | NOT_BARE },
+		{ "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE },
 		{ "cherry", cmd_cherry, RUN_SETUP },
-		{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NOT_BARE },
+		{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 		{ "commit-tree", cmd_commit_tree, RUN_SETUP },
 		{ "config", cmd_config },
 		{ "count-objects", cmd_count_objects, RUN_SETUP },
@@ -268,7 +331,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "mailsplit", cmd_mailsplit },
 		{ "merge-base", cmd_merge_base, RUN_SETUP },
 		{ "merge-file", cmd_merge_file },
-		{ "mv", cmd_mv, RUN_SETUP | NOT_BARE },
+		{ "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
 		{ "name-rev", cmd_name_rev, RUN_SETUP },
 		{ "pack-objects", cmd_pack_objects, RUN_SETUP },
 		{ "pickaxe", cmd_blame, RUN_SETUP | USE_PAGER },
@@ -281,9 +344,9 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 		{ "rerere", cmd_rerere, RUN_SETUP },
 		{ "rev-list", cmd_rev_list, RUN_SETUP },
 		{ "rev-parse", cmd_rev_parse, RUN_SETUP },
-		{ "revert", cmd_revert, RUN_SETUP | NOT_BARE },
-		{ "rm", cmd_rm, RUN_SETUP | NOT_BARE },
-		{ "runstatus", cmd_runstatus, RUN_SETUP | NOT_BARE },
+		{ "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
+		{ "rm", cmd_rm, RUN_SETUP | NEED_WORK_TREE },
+		{ "runstatus", cmd_runstatus, RUN_SETUP | NEED_WORK_TREE },
 		{ "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER },
 		{ "show-branch", cmd_show_branch, RUN_SETUP },
 		{ "show", cmd_show, RUN_SETUP | USE_PAGER },
@@ -320,25 +383,13 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
 
 	for (i = 0; i < ARRAY_SIZE(commands); i++) {
 		struct cmd_struct *p = commands+i;
-		const char *prefix;
 		if (strcmp(p->cmd, cmd))
 			continue;
-
-		prefix = NULL;
-		if (p->option & RUN_SETUP)
-			prefix = setup_git_directory();
-		if (p->option & USE_PAGER)
-			setup_pager();
-		if ((p->option & NOT_BARE) &&
-				(is_bare_repository() || is_inside_git_dir()))
-			die("%s must be run in a work tree", cmd);
-		trace_argv_printf(argv, argc, "trace: built-in: git");
-
-		exit(p->fn(argc, argv, prefix));
+		exit(run_command(p, argc, argv));
 	}
 }
 
-int main(int argc, const char **argv, char **envp)
+int main(int argc, const char **argv)
 {
 	const char *cmd = argv[0] ? argv[0] : "git-help";
 	char *slash = strrchr(cmd, '/');
@@ -381,14 +432,14 @@ int main(int argc, const char **argv, char **envp)
 	if (!prefixcmp(cmd, "git-")) {
 		cmd += 4;
 		argv[0] = cmd;
-		handle_internal_command(argc, argv, envp);
+		handle_internal_command(argc, argv);
 		die("cannot handle %s internally", cmd);
 	}
 
 	/* Look for flags.. */
 	argv++;
 	argc--;
-	handle_options(&argv, &argc);
+	handle_options(&argv, &argc, NULL);
 	if (argc > 0) {
 		if (!prefixcmp(argv[0], "--"))
 			argv[0] += 2;
@@ -413,7 +464,7 @@ int main(int argc, const char **argv, char **envp)
 
 	while (1) {
 		/* See if it's an internal command */
-		handle_internal_command(argc, argv, envp);
+		handle_internal_command(argc, argv);
 
 		/* .. then try the external ones */
 		execv_git_cmd(argv);
diff --git a/log-tree.c b/log-tree.c
index 0cf21bc051..ced3f332ef 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -408,5 +408,6 @@ int log_tree_commit(struct rev_info *opt, struct commit *commit)
 		shown = 1;
 	}
 	opt->loginfo = NULL;
+	maybe_flush_or_die(stdout, "stdout");
 	return shown;
 }
diff --git a/setup.c b/setup.c
index 38adb7c80a..d5ea60238d 100644
--- a/setup.c
+++ b/setup.c
@@ -132,7 +132,7 @@ void verify_non_filename(const char *prefix, const char *arg)
 	const char *name;
 	struct stat st;
 
-	if (is_inside_git_dir())
+	if (!is_inside_work_tree() || is_inside_git_dir())
 		return;
 	if (*arg == '-')
 		return; /* flag */
@@ -211,42 +211,104 @@ static int inside_git_dir = -1;
 
 int is_inside_git_dir(void)
 {
-	if (inside_git_dir < 0) {
-		char buffer[1024];
+	if (inside_git_dir >= 0)
+		return inside_git_dir;
+	die("BUG: is_inside_git_dir called before setup_git_directory");
+}
 
-		if (is_bare_repository())
-			return (inside_git_dir = 1);
-		if (getcwd(buffer, sizeof(buffer))) {
-			const char *git_dir = get_git_dir(), *cwd = buffer;
-			while (*git_dir && *git_dir == *cwd) {
-				git_dir++;
-				cwd++;
-			}
-			inside_git_dir = !*git_dir;
-		} else
-			inside_git_dir = 0;
+static int inside_work_tree = -1;
+
+int is_inside_work_tree(void)
+{
+	if (inside_git_dir >= 0)
+		return inside_work_tree;
+	die("BUG: is_inside_work_tree called before setup_git_directory");
+}
+
+static char *gitworktree_config;
+
+static int git_setup_config(const char *var, const char *value)
+{
+	if (!strcmp(var, "core.worktree")) {
+		if (gitworktree_config)
+			strlcpy(gitworktree_config, value, PATH_MAX);
+		return 0;
 	}
-	return inside_git_dir;
+	return git_default_config(var, value);
 }
 
 const char *setup_git_directory_gently(int *nongit_ok)
 {
 	static char cwd[PATH_MAX+1];
-	const char *gitdirenv;
-	int len, offset;
-	int minoffset = 0;
+	char worktree[PATH_MAX+1], gitdir[PATH_MAX+1];
+	const char *gitdirenv, *gitworktree;
+	int wt_rel_gitdir = 0;
 
-	/*
-	 * If GIT_DIR is set explicitly, we're not going
-	 * to do any discovery, but we still do repository
-	 * validation.
-	 */
 	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
-	if (gitdirenv) {
-		if (PATH_MAX - 40 < strlen(gitdirenv))
-			die("'$%s' too big", GIT_DIR_ENVIRONMENT);
-		if (is_git_directory(gitdirenv))
+	if (!gitdirenv) {
+		int len, offset;
+		int minoffset = 0;
+
+#ifdef __MINGW32__
+		if (!getcwd(cwd, sizeof(cwd)-1) || !(cwd[0] == '/' || cwd[1] == ':'))
+			die("Unable to read current working directory");
+		if (cwd[1] == ':')
+			minoffset = 2;
+#else
+		if (!getcwd(cwd, sizeof(cwd)-1) || cwd[0] != '/')
+			die("Unable to read current working directory");
+#endif
+
+		offset = len = strlen(cwd);
+		for (;;) {
+			if (is_git_directory(".git"))
+				break;
+			if (offset == 0) {
+				offset = -1;
+				break;
+			}
+			chdir("..");
+			while (offset > minoffset && cwd[--offset] != '/')
+				; /* do nothing */
+		}
+
+		if (offset >= 0) {
+			inside_work_tree = 1;
+			git_config(git_default_config);
+			if (offset == len) {
+				inside_git_dir = 0;
+				return NULL;
+			}
+
+			cwd[len++] = '/';
+			cwd[len] = '\0';
+			inside_git_dir = !prefixcmp(cwd + offset + 1, ".git/");
+			return cwd + offset + 1;
+		}
+
+		if (chdir(cwd))
+			die("Cannot come back to cwd");
+		if (!is_git_directory(".")) {
+			if (nongit_ok) {
+				*nongit_ok = 1;
+				return NULL;
+			}
+			die("Not a git repository");
+		}
+		setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
+		gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
+		if (!gitdirenv)
+			die("getenv after setenv failed");
+	}
+
+	if (PATH_MAX - 40 < strlen(gitdirenv)) {
+		if (nongit_ok) {
+			*nongit_ok = 1;
 			return NULL;
+		}
+		die("$%s too big", GIT_DIR_ENVIRONMENT);
+	}
+	if (!is_git_directory(gitdirenv)) {
 		if (nongit_ok) {
 			*nongit_ok = 1;
 			return NULL;
@@ -254,50 +316,94 @@ const char *setup_git_directory_gently(int *nongit_ok)
 		die("Not a git repository: '%s'", gitdirenv);
 	}
 
-#ifdef __MINGW32__
-	if (!getcwd(cwd, sizeof(cwd)-1) || !(cwd[0] == '/' || cwd[1] == ':'))
-		die("Unable to read current working directory");
-	if (cwd[1] == ':')
-		minoffset = 2;
-#else
 	if (!getcwd(cwd, sizeof(cwd)-1) || cwd[0] != '/')
 		die("Unable to read current working directory");
-#endif
+	if (chdir(gitdirenv)) {
+		if (nongit_ok) {
+			*nongit_ok = 1;
+			return NULL;
+		}
+		die("Cannot change directory to $%s '%s'",
+			GIT_DIR_ENVIRONMENT, gitdirenv);
+	}
+	if (!getcwd(gitdir, sizeof(gitdir)-1) || gitdir[0] != '/')
+		die("Unable to read current working directory");
+	if (chdir(cwd))
+		die("Cannot come back to cwd");
 
-	offset = len = strlen(cwd);
-	for (;;) {
-		if (is_git_directory(".git"))
-			break;
-		chdir("..");
-		do {
-			if (offset <= minoffset) {
-				if (is_git_directory(cwd)) {
-					if (chdir(cwd))
-						die("Cannot come back to cwd");
-					setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
-					inside_git_dir = 1;
-					return NULL;
-				}
-				if (nongit_ok) {
-					if (chdir(cwd))
-						die("Cannot come back to cwd");
-					*nongit_ok = 1;
-					return NULL;
-				}
-				die("Not a git repository");
+	/*
+	 * In case there is a work tree we may change the directory,
+	 * therefore make GIT_DIR an absolute path.
+	 */
+	if (gitdirenv[0] != '/') {
+		setenv(GIT_DIR_ENVIRONMENT, gitdir, 1);
+		gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
+		if (!gitdirenv)
+			die("getenv after setenv failed");
+		if (PATH_MAX - 40 < strlen(gitdirenv)) {
+			if (nongit_ok) {
+				*nongit_ok = 1;
+				return NULL;
 			}
-		} while (offset > minoffset && cwd[--offset] != '/');
+			die("$%s too big after expansion to absolute path",
+				GIT_DIR_ENVIRONMENT);
+		}
 	}
 
-	if (offset == len)
-		return NULL;
+	strcat(cwd, "/");
+	strcat(gitdir, "/");
+	inside_git_dir = !prefixcmp(cwd, gitdir);
 
-	/* Make "offset" point to past the '/', and add a '/' at the end */
-	offset++;
-	cwd[len++] = '/';
-	cwd[len] = 0;
-	inside_git_dir = !prefixcmp(cwd + offset, ".git/");
-	return cwd + offset;
+	gitworktree = getenv(GIT_WORK_TREE_ENVIRONMENT);
+	if (!gitworktree) {
+		gitworktree_config = worktree;
+		worktree[0] = '\0';
+	}
+	git_config(git_setup_config);
+	if (!gitworktree) {
+		gitworktree_config = NULL;
+		if (worktree[0])
+			gitworktree = worktree;
+		if (gitworktree && gitworktree[0] != '/')
+			wt_rel_gitdir = 1;
+	}
+
+	if (wt_rel_gitdir && chdir(gitdirenv))
+		die("Cannot change directory to $%s '%s'",
+			GIT_DIR_ENVIRONMENT, gitdirenv);
+	if (gitworktree && chdir(gitworktree)) {
+		if (nongit_ok) {
+			if (wt_rel_gitdir && chdir(cwd))
+				die("Cannot come back to cwd");
+			*nongit_ok = 1;
+			return NULL;
+		}
+		if (wt_rel_gitdir)
+			die("Cannot change directory to working tree '%s'"
+				" from $%s", gitworktree, GIT_DIR_ENVIRONMENT);
+		else
+			die("Cannot change directory to working tree '%s'",
+				gitworktree);
+	}
+	if (!getcwd(worktree, sizeof(worktree)-1) || worktree[0] != '/')
+		die("Unable to read current working directory");
+	strcat(worktree, "/");
+	inside_work_tree = !prefixcmp(cwd, worktree);
+
+	if (gitworktree && inside_work_tree && !prefixcmp(worktree, gitdir) &&
+	    strcmp(worktree, gitdir)) {
+		inside_git_dir = 0;
+	}
+
+	if (!inside_work_tree) {
+		if (chdir(cwd))
+			die("Cannot come back to cwd");
+		return NULL;
+	}
+
+	if (!strcmp(cwd, worktree))
+		return NULL;
+	return cwd+strlen(worktree);
 }
 
 int git_config_perm(const char *var, const char *value)
diff --git a/t/t0030-stripspace.sh b/t/t0030-stripspace.sh
new file mode 100755
index 0000000000..f4294d72d9
--- /dev/null
+++ b/t/t0030-stripspace.sh
@@ -0,0 +1,355 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Carlos Rica
+#
+
+test_description='git-stripspace'
+
+. ./test-lib.sh
+
+t40='A quick brown fox jumps over the lazy do'
+s40='                                        '
+sss="$s40$s40$s40$s40$s40$s40$s40$s40$s40$s40" # 400
+ttt="$t40$t40$t40$t40$t40$t40$t40$t40$t40$t40" # 400
+
+test_expect_success \
+    'long lines without spaces should be unchanged' '
+    echo "$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt$ttt$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'lines with spaces at the beginning should be unchanged' '
+    echo "$sss$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$sss$sss$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$sss$sss$sss$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'lines with intermediate spaces should be unchanged' '
+    echo "$ttt$sss$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$sss$sss$ttt" >expect &&
+    git-stripspace <expect >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'consecutive blank lines should be unified' '
+    printf "$ttt\n\n$ttt\n" > expect &&
+    printf "$ttt\n\n\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt\n\n$ttt\n" > expect &&
+    printf "$ttt$ttt\n\n\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt\n\n$ttt\n" > expect &&
+    printf "$ttt$ttt$ttt\n\n\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n\n$ttt\n" > expect &&
+    printf "$ttt\n\n\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n\n$ttt$ttt\n" > expect &&
+    printf "$ttt\n\n\n\n\n$ttt$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n\n$ttt$ttt$ttt\n" > expect &&
+    printf "$ttt\n\n\n\n\n$ttt$ttt$ttt\n" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'consecutive blank lines at the beginning should be removed' '
+    printf "" > expect &&
+    printf "\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "$sss\n$sss\n$sss\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "$sss$sss\n$sss\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "\n$sss\n$sss$sss\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "$sss$sss$sss$sss\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "\n$sss$sss$sss$sss\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "" > expect &&
+    printf "\n\n$sss$sss$sss$sss\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt\n" > expect &&
+    printf "\n\n\n$ttt$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt\n" > expect &&
+    printf "\n\n\n$ttt$ttt$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt$ttt\n" > expect &&
+    printf "\n\n\n$ttt$ttt$ttt$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$sss\n$sss\n$sss\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "\n$sss\n$sss$sss\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$sss$sss\n$sss\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$sss$sss$sss\n\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "\n$sss$sss$sss\n\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "\n\n$sss$sss$sss\n$ttt\n" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'consecutive blank lines at the end should be removed' '
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt\n" > expect &&
+    printf "$ttt$ttt\n\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt\n" > expect &&
+    printf "$ttt$ttt$ttt\n\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt$ttt\n" > expect &&
+    printf "$ttt$ttt$ttt$ttt\n\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n$sss\n$sss\n$sss\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n\n$sss\n$sss$sss\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n$sss$sss\n$sss\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n$sss$sss$sss\n\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n\n$sss$sss$sss\n\n" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" > expect &&
+    printf "$ttt\n\n\n$sss$sss$sss\n" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_expect_success \
+    'text without newline at end should end with newline' '
+    test `printf "$ttt" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt$ttt" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt$ttt$ttt" | git-stripspace | wc -l` -gt 0
+'
+
+# text plus spaces at the end:
+
+test_expect_success \
+    'text plus spaces without newline at end should end with newline' '
+    test `printf "$ttt$sss" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt$sss" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt$ttt$sss" | git-stripspace | wc -l` -gt 0
+    test `printf "$ttt$sss$sss" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$ttt$sss$sss" | git-stripspace | wc -l` -gt 0 &&
+    test `printf "$ttt$sss$sss$sss" | git-stripspace | wc -l` -gt 0
+'
+
+test_expect_failure \
+    'text plus spaces without newline at end should not show spaces' '
+    printf "$ttt$sss" | git-stripspace | grep -q "  " ||
+    printf "$ttt$ttt$sss" | git-stripspace | grep -q "  " ||
+    printf "$ttt$ttt$ttt$sss" | git-stripspace | grep -q "  " ||
+    printf "$ttt$sss$sss" | git-stripspace | grep -q "  " ||
+    printf "$ttt$ttt$sss$sss" | git-stripspace | grep -q "  " ||
+    printf "$ttt$sss$sss$sss" | git-stripspace | grep -q "  "
+'
+
+test_expect_success \
+    'text plus spaces without newline should show the correct lines' '
+    printf "$ttt\n" >expect &&
+    printf "$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" >expect &&
+    printf "$ttt$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt\n" >expect &&
+    printf "$ttt$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt\n" >expect &&
+    printf "$ttt$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt\n" >expect &&
+    printf "$ttt$ttt$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    printf "$ttt$ttt$ttt\n" >expect &&
+    printf "$ttt$ttt$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_expect_failure \
+    'text plus spaces at end should not show spaces' '
+    echo "$ttt$sss" | git-stripspace | grep -q "  " ||
+    echo "$ttt$ttt$sss" | git-stripspace | grep -q "  " ||
+    echo "$ttt$ttt$ttt$sss" | git-stripspace | grep -q "  " ||
+    echo "$ttt$sss$sss" | git-stripspace | grep -q "  " ||
+    echo "$ttt$ttt$sss$sss" | git-stripspace | grep -q "  " ||
+    echo "$ttt$sss$sss$sss" | git-stripspace | grep -q "  "
+'
+
+test_expect_success \
+    'text plus spaces at end should be cleaned and newline must remain' '
+    echo "$ttt" >expect &&
+    echo "$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$ttt" >expect &&
+    echo "$ttt$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$ttt" >expect &&
+    echo "$ttt$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt" >expect &&
+    echo "$ttt$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt" >expect &&
+    echo "$ttt$ttt$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$ttt$ttt$ttt" >expect &&
+    echo "$ttt$ttt$ttt$sss" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+# spaces only:
+
+test_expect_success \
+    'spaces with newline at end should be replaced with empty string' '
+    printf "" >expect &&
+
+    echo | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual &&
+
+    echo "$sss$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_expect_failure \
+    'spaces without newline at end should not show spaces' '
+    printf "" | git-stripspace | grep -q " " ||
+    printf "$sss" | git-stripspace | grep -q " " ||
+    printf "$sss$sss" | git-stripspace | grep -q " " ||
+    printf "$sss$sss$sss" | git-stripspace | grep -q " " ||
+    printf "$sss$sss$sss$sss" | git-stripspace | grep -q " "
+'
+
+test_expect_success \
+    'spaces without newline at end should be replaced with empty string' '
+    printf "" >expect &&
+
+    printf "" | git-stripspace >actual &&
+    git diff expect actual
+
+    printf "$sss$sss" | git-stripspace >actual &&
+    git diff expect actual
+
+    printf "$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual
+
+    printf "$sss$sss$sss$sss" | git-stripspace >actual &&
+    git diff expect actual
+'
+
+test_done
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 27486de4de..a2c11c4639 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -471,11 +471,57 @@ test_expect_success bool '
         done &&
 	cmp expect result'
 
-test_expect_failure 'invalid bool' '
+test_expect_failure 'invalid bool (--get)' '
 
 	git-config bool.nobool foobar &&
 	git-config --bool --get bool.nobool'
 
+test_expect_failure 'invalid bool (set)' '
+
+	git-config --bool bool.nobool foobar'
+
+rm .git/config
+
+cat > expect <<\EOF
+[bool]
+	true1 = true
+	true2 = true
+	true3 = true
+	true4 = true
+	false1 = false
+	false2 = false
+	false3 = false
+	false4 = false
+EOF
+
+test_expect_success 'set --bool' '
+
+	git-config --bool bool.true1 01 &&
+	git-config --bool bool.true2 -1 &&
+	git-config --bool bool.true3 YeS &&
+	git-config --bool bool.true4 true &&
+	git-config --bool bool.false1 000 &&
+	git-config --bool bool.false2 "" &&
+	git-config --bool bool.false3 nO &&
+	git-config --bool bool.false4 FALSE &&
+	cmp expect .git/config'
+
+rm .git/config
+
+cat > expect <<\EOF
+[int]
+	val1 = 1
+	val2 = -1
+	val3 = 5242880
+EOF
+
+test_expect_success 'set --int' '
+
+	git-config --int int.val1 01 &&
+	git-config --int int.val2 -1 &&
+	git-config --int int.val3 5m &&
+	cmp expect .git/config'
+
 rm .git/config
 
 git-config quote.leading " test"
diff --git a/t/t1500-rev-parse.sh b/t/t1500-rev-parse.sh
new file mode 100755
index 0000000000..ec4996637d
--- /dev/null
+++ b/t/t1500-rev-parse.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+
+test_description='test git rev-parse'
+. ./test-lib.sh
+
+test_rev_parse() {
+	name=$1
+	shift
+
+	test_expect_success "$name: is-bare-repository" \
+	"test '$1' = \"\$(git rev-parse --is-bare-repository)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-git-dir" \
+	"test '$1' = \"\$(git rev-parse --is-inside-git-dir)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-work-tree" \
+	"test '$1' = \"\$(git rev-parse --is-inside-work-tree)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: prefix" \
+	"test '$1' = \"\$(git rev-parse --show-prefix)\""
+	shift
+	[ $# -eq 0 ] && return
+}
+
+test_rev_parse toplevel false false true ''
+
+cd .git || exit 1
+test_rev_parse .git/ false true true .git/
+cd objects || exit 1
+test_rev_parse .git/objects/ false true true .git/objects/
+cd ../.. || exit 1
+
+mkdir -p sub/dir || exit 1
+cd sub/dir || exit 1
+test_rev_parse subdirectory false false true sub/dir/
+cd ../.. || exit 1
+
+git config core.bare true
+test_rev_parse 'core.bare = true' true false true
+
+git config --unset core.bare
+test_rev_parse 'core.bare undefined' false false true
+
+mkdir work || exit 1
+cd work || exit 1
+export GIT_DIR=../.git
+export GIT_CONFIG="$GIT_DIR"/config
+
+git config core.bare false
+test_rev_parse 'GIT_DIR=../.git, core.bare = false' false false true ''
+
+git config core.bare true
+test_rev_parse 'GIT_DIR=../.git, core.bare = true' true false true ''
+
+git config --unset core.bare
+test_rev_parse 'GIT_DIR=../.git, core.bare undefined' false false true ''
+
+mv ../.git ../repo.git || exit 1
+export GIT_DIR=../repo.git
+export GIT_CONFIG="$GIT_DIR"/config
+
+git config core.bare false
+test_rev_parse 'GIT_DIR=../repo.git, core.bare = false' false false true ''
+
+git config core.bare true
+test_rev_parse 'GIT_DIR=../repo.git, core.bare = true' true false true ''
+
+git config --unset core.bare
+test_rev_parse 'GIT_DIR=../repo.git, core.bare undefined' true false true ''
+
+test_done
diff --git a/t/t1501-worktree.sh b/t/t1501-worktree.sh
new file mode 100755
index 0000000000..aadeeab9ab
--- /dev/null
+++ b/t/t1501-worktree.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+test_description='test separate work tree'
+. ./test-lib.sh
+
+test_rev_parse() {
+	name=$1
+	shift
+
+	test_expect_success "$name: is-bare-repository" \
+	"test '$1' = \"\$(git rev-parse --is-bare-repository)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-git-dir" \
+	"test '$1' = \"\$(git rev-parse --is-inside-git-dir)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: is-inside-work-tree" \
+	"test '$1' = \"\$(git rev-parse --is-inside-work-tree)\""
+	shift
+	[ $# -eq 0 ] && return
+
+	test_expect_success "$name: prefix" \
+	"test '$1' = \"\$(git rev-parse --show-prefix)\""
+	shift
+	[ $# -eq 0 ] && return
+}
+
+mkdir -p work/sub/dir || exit 1
+mv .git repo.git || exit 1
+
+say "core.worktree = relative path"
+export GIT_DIR=repo.git
+export GIT_CONFIG=$GIT_DIR/config
+unset GIT_WORK_TREE
+git config core.worktree ../work
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+export GIT_DIR=../repo.git
+export GIT_CONFIG=$GIT_DIR/config
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+export GIT_DIR=../../../repo.git
+export GIT_CONFIG=$GIT_DIR/config
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+say "core.worktree = absolute path"
+export GIT_DIR=$(pwd)/repo.git
+export GIT_CONFIG=$GIT_DIR/config
+git config core.worktree "$(pwd)/work"
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+say "GIT_WORK_TREE=relative path (override core.worktree)"
+export GIT_DIR=$(pwd)/repo.git
+export GIT_CONFIG=$GIT_DIR/config
+git config core.worktree non-existent
+export GIT_WORK_TREE=work
+test_rev_parse 'outside'      false false false
+cd work || exit 1
+export GIT_WORK_TREE=.
+test_rev_parse 'inside'       false false true ''
+cd sub/dir || exit 1
+export GIT_WORK_TREE=../..
+test_rev_parse 'subdirectory' false false true sub/dir/
+cd ../../.. || exit 1
+
+mv work repo.git/work
+
+say "GIT_WORK_TREE=absolute path, work tree below git dir"
+export GIT_DIR=$(pwd)/repo.git
+export GIT_CONFIG=$GIT_DIR/config
+export GIT_WORK_TREE=$(pwd)/repo.git/work
+test_rev_parse 'outside'              false false false
+cd repo.git || exit 1
+test_rev_parse 'in repo.git'              false true  false
+cd objects || exit 1
+test_rev_parse 'in repo.git/objects'      false true  false
+cd ../work || exit 1
+test_rev_parse 'in repo.git/work'         false false true ''
+cd sub/dir || exit 1
+test_rev_parse 'in repo.git/sub/dir' false false true sub/dir/
+cd ../../../.. || exit 1
+
+test_done
diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh
new file mode 100755
index 0000000000..5d15449be5
--- /dev/null
+++ b/t/t7004-tag.sh
@@ -0,0 +1,686 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Carlos Rica
+#
+
+test_description='git-tag
+
+Basic tests for operations with tags.'
+
+. ./test-lib.sh
+
+# creating and listing lightweight tags:
+
+tag_exists () {
+	git show-ref --quiet --verify refs/tags/"$1"
+}
+
+# todo: git tag -l now returns always zero, when fixed, change this test
+test_expect_success 'listing all tags in an empty tree should succeed' \
+	'git tag -l'
+
+test_expect_success 'listing all tags in an empty tree should output nothing' \
+	'test `git-tag -l | wc -l` -eq 0'
+
+test_expect_failure 'looking for a tag in an empty tree should fail' \
+	'tag_exists mytag'
+
+test_expect_success 'creating a tag in an empty tree should fail' '
+	! git-tag mynotag &&
+	! tag_exists mynotag
+'
+
+test_expect_success 'creating a tag for HEAD in an empty tree should fail' '
+	! git-tag mytaghead HEAD &&
+	! tag_exists mytaghead
+'
+
+test_expect_success 'creating a tag for an unknown revision should fail' '
+	! git-tag mytagnorev aaaaaaaaaaa &&
+	! tag_exists mytagnorev
+'
+
+# commit used in the tests, test_tick is also called here to freeze the date:
+test_expect_success 'creating a tag using default HEAD should succeed' '
+	test_tick &&
+	echo foo >foo &&
+	git add foo &&
+	git commit -m Foo &&
+	git tag mytag
+'
+
+test_expect_success 'listing all tags if one exists should succeed' \
+	'git-tag -l'
+
+test_expect_success 'listing all tags if one exists should output that tag' \
+	'test `git-tag -l` = mytag'
+
+# pattern matching:
+
+test_expect_success 'listing a tag using a matching pattern should succeed' \
+	'git-tag -l mytag'
+
+test_expect_success \
+	'listing a tag using a matching pattern should output that tag' \
+	'test `git-tag -l mytag` = mytag'
+
+# todo: git tag -l now returns always zero, when fixed, change this test
+test_expect_success \
+	'listing tags using a non-matching pattern should suceed' \
+	'git-tag -l xxx'
+
+test_expect_success \
+	'listing tags using a non-matching pattern should output nothing' \
+	'test `git-tag -l xxx | wc -l` -eq 0'
+
+# special cases for creating tags:
+
+test_expect_failure \
+	'trying to create a tag with the name of one existing should fail' \
+	'git tag mytag'
+
+test_expect_success \
+	'trying to create a tag with a non-valid name should fail' '
+	test `git-tag -l | wc -l` -eq 1 &&
+	! git tag "" &&
+	! git tag .othertag &&
+	! git tag "other tag" &&
+	! git tag "othertag^" &&
+	! git tag "other~tag" &&
+	test `git-tag -l | wc -l` -eq 1
+'
+
+test_expect_success 'creating a tag using HEAD directly should succeed' '
+	git tag myhead HEAD &&
+	tag_exists myhead
+'
+
+# deleting tags:
+
+test_expect_success 'trying to delete an unknown tag should fail' '
+	! tag_exists unknown-tag &&
+	! git-tag -d unknown-tag
+'
+
+cat >expect <<EOF
+myhead
+mytag
+EOF
+test_expect_success \
+	'trying to delete tags without params should succeed and do nothing' '
+	git tag -l > actual && git diff expect actual &&
+	git-tag -d &&
+	git tag -l > actual && git diff expect actual
+'
+
+test_expect_success \
+	'deleting two existing tags in one command should succeed' '
+	tag_exists mytag &&
+	tag_exists myhead &&
+	git-tag -d mytag myhead &&
+	! tag_exists mytag &&
+	! tag_exists myhead
+'
+
+test_expect_success \
+	'creating a tag with the name of another deleted one should succeed' '
+	! tag_exists mytag &&
+	git-tag mytag &&
+	tag_exists mytag
+'
+
+test_expect_success \
+	'trying to delete two tags, existing and not, should fail in the 2nd' '
+	tag_exists mytag &&
+	! tag_exists myhead &&
+	! git-tag -d mytag anothertag &&
+	! tag_exists mytag &&
+	! tag_exists myhead
+'
+
+test_expect_failure 'trying to delete an already deleted tag should fail' \
+	'git-tag -d mytag'
+
+# listing various tags with pattern matching:
+
+cat >expect <<EOF
+a1
+aa1
+cba
+t210
+t211
+v0.2.1
+v1.0
+v1.0.1
+v1.1.3
+EOF
+test_expect_success 'listing all tags should print them ordered' '
+	git tag v1.0.1 &&
+	git tag t211 &&
+	git tag aa1 &&
+	git tag v0.2.1 &&
+	git tag v1.1.3 &&
+	git tag cba &&
+	git tag a1 &&
+	git tag v1.0 &&
+	git tag t210 &&
+	git tag -l > actual
+	git diff expect actual
+'
+
+cat >expect <<EOF
+a1
+aa1
+cba
+EOF
+test_expect_success \
+	'listing tags with substring as pattern must print those matching' '
+	git-tag -l a > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+v0.2.1
+v1.0.1
+v1.1.3
+EOF
+test_expect_success \
+	'listing tags with substring as pattern must print those matching' '
+	git-tag -l .1 > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+t210
+t211
+EOF
+test_expect_success \
+	'listing tags with substring as pattern must print those matching' '
+	git-tag -l t21 > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+a1
+aa1
+EOF
+test_expect_success \
+	'listing tags using a name as pattern must print those matching' '
+	git-tag -l a1 > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+v1.0
+v1.0.1
+EOF
+test_expect_success \
+	'listing tags using a name as pattern must print those matching' '
+	git-tag -l v1.0 > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+v1.1.3
+EOF
+test_expect_success \
+	'listing tags with ? in the pattern should print those matching' '
+	git-tag -l "1.1?" > actual &&
+	git-diff expect actual
+'
+
+>expect
+test_expect_success \
+	'listing tags using v.* should print nothing because none have v.' '
+	git-tag -l "v.*" > actual &&
+	git-diff expect actual
+'
+
+cat >expect <<EOF
+v0.2.1
+v1.0
+v1.0.1
+v1.1.3
+EOF
+test_expect_success \
+	'listing tags using v* should print only those having v' '
+	git-tag -l "v*" > actual &&
+	git-diff expect actual
+'
+
+# creating and verifying lightweight tags:
+
+test_expect_success \
+	'a non-annotated tag created without parameters should point to HEAD' '
+	git-tag non-annotated-tag &&
+	test $(git-cat-file -t non-annotated-tag) = commit &&
+	test $(git-rev-parse non-annotated-tag) = $(git-rev-parse HEAD)
+'
+
+test_expect_failure 'trying to verify an unknown tag should fail' \
+	'git-tag -v unknown-tag'
+
+test_expect_failure \
+	'trying to verify a non-annotated and non-signed tag should fail' \
+	'git-tag -v non-annotated-tag'
+
+# creating annotated tags:
+
+get_tag_msg () {
+	git cat-file tag "$1" | sed -e "/BEGIN PGP/q"
+}
+
+# run test_tick before committing always gives the time in that timezone
+get_tag_header () {
+cat <<EOF
+object $2
+type $3
+tag $1
+tagger C O Mitter <committer@example.com> $4 -0700
+
+EOF
+}
+
+commit=$(git rev-parse HEAD)
+time=$test_tick
+
+get_tag_header annotated-tag $commit commit $time >expect
+echo "A message" >>expect
+test_expect_success \
+	'creating an annotated tag with -m message should succeed' '
+	git-tag -m "A message" annotated-tag &&
+	get_tag_msg annotated-tag >actual &&
+	git diff expect actual
+'
+
+cat >msgfile <<EOF
+Another message
+in a file.
+EOF
+get_tag_header file-annotated-tag $commit commit $time >expect
+cat msgfile >>expect
+test_expect_success \
+	'creating an annotated tag with -F messagefile should succeed' '
+	git-tag -F msgfile file-annotated-tag &&
+	get_tag_msg file-annotated-tag >actual &&
+	git diff expect actual
+'
+
+# blank and empty messages:
+
+get_tag_header empty-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with an empty -m message should succeed' '
+	git-tag -m "" empty-annotated-tag &&
+	get_tag_msg empty-annotated-tag >actual &&
+	git diff expect actual
+'
+
+>emptyfile
+get_tag_header emptyfile-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with an empty -F messagefile should succeed' '
+	git-tag -F emptyfile emptyfile-annotated-tag &&
+	get_tag_msg emptyfile-annotated-tag >actual &&
+	git diff expect actual
+'
+
+printf '\n\n  \n\t\nLeading blank lines\n' >blanksfile
+printf '\n\t \t  \nRepeated blank lines\n' >>blanksfile
+printf '\n\n\nTrailing spaces      \t  \n' >>blanksfile
+printf '\nTrailing blank lines\n\n\t \n\n' >>blanksfile
+get_tag_header blanks-annotated-tag $commit commit $time >expect
+cat >>expect <<EOF
+Leading blank lines
+
+Repeated blank lines
+
+Trailing spaces
+
+Trailing blank lines
+EOF
+test_expect_success \
+	'extra blanks in the message for an annotated tag should be removed' '
+	git-tag -F blanksfile blanks-annotated-tag &&
+	get_tag_msg blanks-annotated-tag >actual &&
+	git diff expect actual
+'
+
+get_tag_header blank-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with blank -m message with spaces should succeed' '
+	git-tag -m "     " blank-annotated-tag &&
+	get_tag_msg blank-annotated-tag >actual &&
+	git diff expect actual
+'
+
+echo '     ' >blankfile
+echo ''      >>blankfile
+echo '  '    >>blankfile
+get_tag_header blankfile-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with blank -F messagefile with spaces should succeed' '
+	git-tag -F blankfile blankfile-annotated-tag &&
+	get_tag_msg blankfile-annotated-tag >actual &&
+	git diff expect actual
+'
+
+printf '      ' >blanknonlfile
+get_tag_header blanknonlfile-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with -F file of spaces and no newline should succeed' '
+	git-tag -F blanknonlfile blanknonlfile-annotated-tag &&
+	get_tag_msg blanknonlfile-annotated-tag >actual &&
+	git diff expect actual
+'
+
+# messages with commented lines:
+
+cat >commentsfile <<EOF
+# A comment
+
+############
+The message.
+############
+One line.
+
+
+# commented lines
+# commented lines
+
+Another line.
+# comments
+
+Last line.
+EOF
+get_tag_header comments-annotated-tag $commit commit $time >expect
+cat >>expect <<EOF
+The message.
+One line.
+
+Another line.
+
+Last line.
+EOF
+test_expect_success \
+	'creating a tag using a -F messagefile with #comments should succeed' '
+	git-tag -F commentsfile comments-annotated-tag &&
+	get_tag_msg comments-annotated-tag >actual &&
+	git diff expect actual
+'
+
+get_tag_header comment-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with a #comment in the -m message should succeed' '
+	git-tag -m "#comment" comment-annotated-tag &&
+	get_tag_msg comment-annotated-tag >actual &&
+	git diff expect actual
+'
+
+echo '#comment' >commentfile
+echo ''         >>commentfile
+echo '####'     >>commentfile
+get_tag_header commentfile-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with #comments in the -F messagefile should succeed' '
+	git-tag -F commentfile commentfile-annotated-tag &&
+	get_tag_msg commentfile-annotated-tag >actual &&
+	git diff expect actual
+'
+
+printf '#comment' >commentnonlfile
+get_tag_header commentnonlfile-annotated-tag $commit commit $time >expect
+test_expect_success \
+	'creating a tag with a file of #comment and no newline should succeed' '
+	git-tag -F commentnonlfile commentnonlfile-annotated-tag &&
+	get_tag_msg commentnonlfile-annotated-tag >actual &&
+	git diff expect actual
+'
+
+# trying to verify annotated non-signed tags:
+
+test_expect_success \
+	'trying to verify an annotated non-signed tag should fail' '
+	tag_exists annotated-tag &&
+	! git-tag -v annotated-tag
+'
+
+test_expect_success \
+	'trying to verify a file-annotated non-signed tag should fail' '
+	tag_exists file-annotated-tag &&
+	! git-tag -v file-annotated-tag
+'
+
+# creating and verifying signed tags:
+
+gpg --version >/dev/null
+if [ $? -eq 127 ]; then
+	echo "Skipping signed tags tests, because gpg was not found"
+	test_done
+	exit
+fi
+
+# key generation info: gpg --homedir t/t7004 --gen-key
+# Type DSA and Elgamal, size 2048 bits, no expiration date.
+# Name and email: C O Mitter <committer@example.com>
+# No password given, to enable non-interactive operation.
+
+cp -R ../t7004 ./gpghome
+chmod 0700 gpghome
+export GNUPGHOME="$(pwd)/gpghome"
+
+get_tag_header signed-tag $commit commit $time >expect
+echo 'A signed tag message' >>expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success 'creating a signed tag with -m message should succeed' '
+	git-tag -s -m "A signed tag message" signed-tag &&
+	get_tag_msg signed-tag >actual &&
+	git-diff expect actual
+'
+
+test_expect_success 'verifying a signed tag should succeed' \
+	'git-tag -v signed-tag'
+
+test_expect_success 'verifying a forged tag should fail' '
+	forged=$(git cat-file tag signed-tag |
+		sed -e "s/signed-tag/forged-tag/" |
+		git mktag) &&
+	git tag forged-tag $forged &&
+	! git-tag -v forged-tag
+'
+
+# blank and empty messages for signed tags:
+
+get_tag_header empty-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with an empty -m message should succeed' '
+	git-tag -s -m "" empty-signed-tag &&
+	get_tag_msg empty-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v empty-signed-tag
+'
+
+>sigemptyfile
+get_tag_header emptyfile-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with an empty -F messagefile should succeed' '
+	git-tag -s -F sigemptyfile emptyfile-signed-tag &&
+	get_tag_msg emptyfile-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v emptyfile-signed-tag
+'
+
+printf '\n\n  \n\t\nLeading blank lines\n' > sigblanksfile
+printf '\n\t \t  \nRepeated blank lines\n' >>sigblanksfile
+printf '\n\n\nTrailing spaces      \t  \n' >>sigblanksfile
+printf '\nTrailing blank lines\n\n\t \n\n' >>sigblanksfile
+get_tag_header blanks-signed-tag $commit commit $time >expect
+cat >>expect <<EOF
+Leading blank lines
+
+Repeated blank lines
+
+Trailing spaces
+
+Trailing blank lines
+EOF
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'extra blanks in the message for a signed tag should be removed' '
+	git-tag -s -F sigblanksfile blanks-signed-tag &&
+	get_tag_msg blanks-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v blanks-signed-tag
+'
+
+get_tag_header blank-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with a blank -m message should succeed' '
+	git-tag -s -m "     " blank-signed-tag &&
+	get_tag_msg blank-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v blank-signed-tag
+'
+
+echo '     ' >sigblankfile
+echo ''      >>sigblankfile
+echo '  '    >>sigblankfile
+get_tag_header blankfile-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with blank -F file with spaces should succeed' '
+	git-tag -s -F sigblankfile blankfile-signed-tag &&
+	get_tag_msg blankfile-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v blankfile-signed-tag
+'
+
+printf '      ' >sigblanknonlfile
+get_tag_header blanknonlfile-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with spaces and no newline should succeed' '
+	git-tag -s -F sigblanknonlfile blanknonlfile-signed-tag &&
+	get_tag_msg blanknonlfile-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v signed-tag
+'
+
+# messages with commented lines for signed tags:
+
+cat >sigcommentsfile <<EOF
+# A comment
+
+############
+The message.
+############
+One line.
+
+
+# commented lines
+# commented lines
+
+Another line.
+# comments
+
+Last line.
+EOF
+get_tag_header comments-signed-tag $commit commit $time >expect
+cat >>expect <<EOF
+The message.
+One line.
+
+Another line.
+
+Last line.
+EOF
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with a -F file with #comments should succeed' '
+	git-tag -s -F sigcommentsfile comments-signed-tag &&
+	get_tag_msg comments-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v comments-signed-tag
+'
+
+get_tag_header comment-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with #commented -m message should succeed' '
+	git-tag -s -m "#comment" comment-signed-tag &&
+	get_tag_msg comment-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v comment-signed-tag
+'
+
+echo '#comment' >sigcommentfile
+echo ''         >>sigcommentfile
+echo '####'     >>sigcommentfile
+get_tag_header commentfile-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with #commented -F messagefile should succeed' '
+	git-tag -s -F sigcommentfile commentfile-signed-tag &&
+	get_tag_msg commentfile-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v commentfile-signed-tag
+'
+
+printf '#comment' >sigcommentnonlfile
+get_tag_header commentnonlfile-signed-tag $commit commit $time >expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag with a #comment and no newline should succeed' '
+	git-tag -s -F sigcommentnonlfile commentnonlfile-signed-tag &&
+	get_tag_msg commentnonlfile-signed-tag >actual &&
+	git diff expect actual &&
+	git-tag -v commentnonlfile-signed-tag
+'
+
+# tags pointing to objects different from commits:
+
+tree=$(git rev-parse HEAD^{tree})
+blob=$(git rev-parse HEAD:foo)
+tag=$(git rev-parse signed-tag)
+
+get_tag_header tree-signed-tag $tree tree $time >expect
+echo "A message for a tree" >>expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag pointing to a tree should succeed' '
+	git-tag -s -m "A message for a tree" tree-signed-tag HEAD^{tree} &&
+	get_tag_msg tree-signed-tag >actual &&
+	git diff expect actual
+'
+
+get_tag_header blob-signed-tag $blob blob $time >expect
+echo "A message for a blob" >>expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag pointing to a blob should succeed' '
+	git-tag -s -m "A message for a blob" blob-signed-tag HEAD:foo &&
+	get_tag_msg blob-signed-tag >actual &&
+	git diff expect actual
+'
+
+get_tag_header tag-signed-tag $tag tag $time >expect
+echo "A message for another tag" >>expect
+echo '-----BEGIN PGP SIGNATURE-----' >>expect
+test_expect_success \
+	'creating a signed tag pointing to another tag should succeed' '
+	git-tag -s -m "A message for another tag" tag-signed-tag signed-tag &&
+	get_tag_msg tag-signed-tag >actual &&
+	git diff expect actual
+'
+
+# try to verify without gpg:
+
+rm -rf gpghome
+test_expect_failure \
+	'verify signed tag fails when public key is not present' \
+	'git-tag -v signed-tag'
+
+test_done
diff --git a/t/t7004/pubring.gpg b/t/t7004/pubring.gpg
new file mode 100644
index 0000000000..83855fa4e1
Binary files /dev/null and b/t/t7004/pubring.gpg differ
diff --git a/t/t7004/random_seed b/t/t7004/random_seed
new file mode 100644
index 0000000000..8fed1339ed
Binary files /dev/null and b/t/t7004/random_seed differ
diff --git a/t/t7004/secring.gpg b/t/t7004/secring.gpg
new file mode 100644
index 0000000000..d831cd9eb3
Binary files /dev/null and b/t/t7004/secring.gpg differ
diff --git a/t/t9400-git-cvsserver-server.sh b/t/t9400-git-cvsserver-server.sh
index 0331770686..641303e0a1 100755
--- a/t/t9400-git-cvsserver-server.sh
+++ b/t/t9400-git-cvsserver-server.sh
@@ -38,7 +38,7 @@ echo >empty &&
   git commit -q -m "First Commit" &&
   git clone -q --local --bare "$WORKDIR/.git" "$SERVERDIR" >/dev/null 2>&1 &&
   GIT_DIR="$SERVERDIR" git config --bool gitcvs.enabled true &&
-  GIT_DIR="$SERVERDIR" git config --bool gitcvs.logfile "$SERVERDIR/gitcvs.log" ||
+  GIT_DIR="$SERVERDIR" git config gitcvs.logfile "$SERVERDIR/gitcvs.log" ||
   exit 1
 
 # note that cvs doesn't accept absolute pathnames
@@ -255,7 +255,7 @@ rm -fr "$SERVERDIR"
 cd "$WORKDIR" &&
 git clone -q --local --bare "$WORKDIR/.git" "$SERVERDIR" >/dev/null 2>&1 &&
 GIT_DIR="$SERVERDIR" git config --bool gitcvs.enabled true &&
-GIT_DIR="$SERVERDIR" git config --bool gitcvs.logfile "$SERVERDIR/gitcvs.log" ||
+GIT_DIR="$SERVERDIR" git config gitcvs.logfile "$SERVERDIR/gitcvs.log" ||
 exit 1
 
 test_expect_success 'cvs update (create new file)' \
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 5410cfa52d..50343497b2 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -26,6 +26,7 @@ GIT_COMMITTER_EMAIL=committer@example.com
 GIT_COMMITTER_NAME='C O Mitter'
 unset GIT_DIFF_OPTS
 unset GIT_DIR
+unset GIT_WORK_TREE
 unset GIT_EXTERNAL_DIFF
 unset GIT_INDEX_FILE
 unset GIT_OBJECT_DIRECTORY
diff --git a/write_or_die.c b/write_or_die.c
index 5c4bc8515a..e125e11d3b 100644
--- a/write_or_die.c
+++ b/write_or_die.c
@@ -1,5 +1,45 @@
 #include "cache.h"
 
+/*
+ * Some cases use stdio, but want to flush after the write
+ * to get error handling (and to get better interactive
+ * behaviour - not buffering excessively).
+ *
+ * Of course, if the flush happened within the write itself,
+ * we've already lost the error code, and cannot report it any
+ * more. So we just ignore that case instead (and hope we get
+ * the right error code on the flush).
+ *
+ * If the file handle is stdout, and stdout is a file, then skip the
+ * flush entirely since it's not needed.
+ */
+void maybe_flush_or_die(FILE *f, const char *desc)
+{
+	static int skip_stdout_flush = -1;
+	struct stat st;
+	char *cp;
+
+	if (f == stdout) {
+		if (skip_stdout_flush < 0) {
+			cp = getenv("GIT_FLUSH");
+			if (cp)
+				skip_stdout_flush = (atoi(cp) == 0);
+			else if ((fstat(fileno(stdout), &st) == 0) &&
+				 S_ISREG(st.st_mode))
+				skip_stdout_flush = 1;
+			else
+				skip_stdout_flush = 0;
+		}
+		if (skip_stdout_flush && !ferror(f))
+			return;
+	}
+	if (fflush(f)) {
+		if (errno == EPIPE)
+			exit(0);
+		die("write failure on %s: %s", desc, strerror(errno));
+	}
+}
+
 int read_in_full(int fd, void *buf, size_t count)
 {
 	char *p = buf;