Commit Graph

17568 Commits

Author SHA1 Message Date
Jeff King
915308b187 avoid 31-bit truncation in write_loose_object
The size of the content we are adding may be larger than
2.1G (i.e., "git add gigantic-file"). Most of the code-path
to do so uses size_t or unsigned long to record the size,
but write_loose_object uses a signed int.

On platforms where "int" is 32-bits (which includes x86_64
Linux platforms), we end up passing malloc a negative size.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 23:40:53 -08:00
Johannes Schindelin
f7951e1d97 Simplify t3412
Use the newly introduced test_commit() and test_merge() helpers.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:17:46 -08:00
Johannes Schindelin
37e5c8f460 Simplify t3411
Use test_commit() and test_merge().  This way, it is harder to forget to
tag, or to call test_tick before committing.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:17:27 -08:00
Johannes Schindelin
4bd03d15e4 Simplify t3410
Use test_commit() and test_merge(), reducing the code while making the
intent clearer.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:17:17 -08:00
Johannes Schindelin
008849689e test-lib.sh: introduce test_commit() and test_merge() helpers
Often we just need to add a commit with a given (short) name, that will
be tagged with the same name.  Now, relatively complicated graphs can be
constructed easily and in a clear fashion:

	test_commit A &&
	test_commit B &&
	git checkout A &&
	test_commit C &&
	test_merge D B

will construct this graph:

	A - B
	  \   \
	    C - D

For simplicity, files whose name is the lower case version of the commit
message (to avoid a warning about ambiguous names) will be committed, with
the corresponding commit messages as contents.

If you need to provide a different file/different contents, you can use
the more explicit form

	test_commit $MESSAGE $FILENAME $CONTENTS

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:16:37 -08:00
Johannes Schindelin
03af0870a0 lib-rebase.sh: Document what set_fake_editor() does
Make it easy for other authors to use rebase tests' fake-editor.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:15:36 -08:00
Johannes Schindelin
29a03348a3 t3404 & t3411: undo copy&paste
Rather than copying and pasting, which is prone to lead to fixes
missing in one version, move the fake-editor generator to t/t3404/.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 20:11:21 -08:00
Junio C Hamano
4cc8d6c62d add -u: do not fail to resolve a path as deleted
After you resolve a conflicted merge to remove the path, "git add -u"
failed to record the removal.  Instead it errored out by saying that the
removed path is not found in the work tree, but that is what the user
already knows, and the wanted to record the removal as the resolution,
so the error does not make sense.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 17:29:33 -08:00
Junio C Hamano
a15080e5f4 builtin-apply.c: do not set bogus mode in check_preimage() for deleted path
If it is deleted, it is deleted.  Do not set the current mode to it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 16:28:15 -08:00
Kirill Smelkov
c32815f903 mailinfo: tests for RFC2047 examples
Also as suggested by Junio, in order to try to catch other MIME
problems, test cases from the "8. Examples" section of RFC2047 are added
to t5100 testsuite as well.

Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru>
2009-01-28 16:23:21 -08:00
Kirill Smelkov
806d5e9044 mailinfo: add explicit test for mails like '<a.u.thor@example.com> (A U Thor)'
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
2009-01-28 15:12:24 -08:00
Junio C Hamano
8712b3cdb0 Merge branch 'tr/previous-branch'
* tr/previous-branch:
  t1505: remove debugging cruft
  Simplify parsing branch switching events in reflog
  Introduce for_each_recent_reflog_ent().
  interpret_nth_last_branch(): plug small memleak
  Fix reflog parsing for a malformed branch switching entry
  Fix parsing of @{-1}@{1}
  interpret_nth_last_branch(): avoid traversing the reflog twice
  checkout: implement "-" abbreviation, add docs and tests
  sha1_name: support @{-N} syntax in get_sha1()
  sha1_name: tweak @{-N} lookup
  checkout: implement "@{-N}" shortcut name for N-th last branch

Conflicts:
	sha1_name.c
2009-01-28 15:00:27 -08:00
Johannes Schindelin
94c88edef7 Fix submodule squashing into unrelated commit
Actually, I think the issue is pretty independent of submodules; when
"git commit" gets an empty parameter, it misinterprets it as a file.

So avoid passing an empty parameter to "git commit".

Actually, this is a nice cleanup, as MSG_FILE and EDIT_COMMIT were mutually
exclusive; use one variable instead

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:54:58 -08:00
Junio C Hamano
9674769665 rebase -i squashes submodule changes into unrelated commit
Attempting to rebase three-commit series (two regular changes, followed by
one commit that changes what commit is bound for a submodule path) to
squash the first two results in a failure; not just the first two commits
squashed, but the change to the submodule is also included in the result.

This failure causes the subsequent step to "pick" the change that actually
changes the submodule to be applied, because there is no change left to be
applied.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:54:58 -08:00
Giuseppe Bilotta
cd956c73a2 gitweb: check if-modified-since for feeds
Offering Last-modified header for feeds is only half the work, even if
we bail out early on HEAD requests. We should also check that same date
against If-modified-since, and bail out early with 304 Not Modified if
that's the case.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Giuseppe Bilotta
2757b54d46 gitweb: last-modified time should be commiter, not author
The last-modified time header added by RSS to increase cache hits from
readers should be set to the date the repository was last modified. The
author time in this respect is not a good guess because the last commit
might come from a oldish patch.

Use the committer time for the last-modified header to ensure a more
correct guess of the last time the repository was modified.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Giuseppe Bilotta
0cf31285a0 gitweb: rss channel date
The RSS 2.0 specifications defines not one but _two_ dates for its
channel element! Woohoo! Luckily, it seems that consensus seems to be
that if both are present they should be equal, except for some very
obscure and discouraged cases. Since lastBuildDate would make more sense
for us and pubDate seems to be the most commonly used, we defined both
and make them equal.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Giuseppe Bilotta
3ac109ae4c gitweb: rss feed managingEditor
The RSS 2.0 specification allows an optional managingEditor tag for the
channel, containing the "email address for person responsible for editorial
content", which is basically the project owner.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Giuseppe Bilotta
ad59a7a359 gitweb: feed generator metadata
Add <generator> tag to RSS and Atom feed. Versioning info (gitweb/git
core versions, separated by a literal slash) is stored in the
appropriate attribute for the Atom feed, and in the tag content for the
RSS feed.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Giuseppe Bilotta
1ba68ce237 gitweb: channel image in rss feed
Define the channel image for the rss feed when the logo or favicon are
defined, preferring the former to the latter. As suggested in the RSS
2.0 specifications, the image's title and link as set to the same as the
channel's.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:13:54 -08:00
Jeff King
d8e96fd86d git: use run_command() to execute dashed externals
We used to simply try calling execvp(); if it succeeded, then we were done
and the new program was running. If it didn't, then we knew that it wasn't
a valid command.

Unfortunately, this interacted badly with the new pager handling. Now that
git remains the parent process and the pager is spawned, git has to hang
around until the pager is finished. We install an atexit handler to do
this, but that handler never gets called if we successfully run execvp.

You could see this behavior by running any dashed external using a pager
(e.g., "git -p stash list"). The command finishes running, but the pager
is still going. In the case of less, it then gets an error reading from
the terminal and exits, potentially leaving the terminal in a broken state
(and not showing the output).

This patch just uses run_command() to try running the dashed external. The
parent git process then waits for the external process to complete and
then handles the pager cleanup as it would for an internal command.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:09:37 -08:00
Jeff King
1d64f21d99 run_command(): help callers distinguish errors
run_command() returns a single integer specifying either an
error code or the exit status of the spawned program. The
only way to tell the difference is that the error codes are
outside of the allowed range of exit status values.

Rather than make each caller implement the test against a
magic limit, let's provide a macro.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:09:35 -08:00
Jeff King
45c0961c87 run_command(): handle missing command errors more gracefully
When run_command() was asked to run a non-existant command, its behavior
varied depending on the platform:

  - on POSIX systems, we would fork, and then after the execvp call
    failed, we could call die(), which prints a message to stderr and
    exits with code 128.

  - on Windows, we do a PATH lookup, realize the program isn't there, and
    then return ERR_RUN_COMMAND_FORK

The goal of this patch is to make it clear to callers that the specific
error was a missing command. To do this, we will return the error code
ERR_RUN_COMMAND_EXEC, which is already defined in run-command.h, checked
for in several places, but never actually gets set.

The new behavior is:

  - on POSIX systems, we exit the forked process with code 127 (the same
    as the shell uses to report missing commands). The parent process
    recognizes this code and returns an EXEC error. The stderr message is
    silenced, since the caller may be speculatively trying to run a
    command. Instead, we use trace_printf so that somebody interested in
    debugging can see the error that occured.

  - on Windows, we check errno, which is already set correctly by
    mingw_spawnvpe, and report an EXEC error instead of a FORK error

Thus it is safe to speculatively run a command:

  int r = run_command_v_opt(argv, 0);
  if (r == -ERR_RUN_COMMAND_EXEC)
	  /* oops, it wasn't found; try something else */
  else
	  /* we failed for some other reason, error is in r */

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 14:08:57 -08:00
Serge van den Boom
85b4518f44 Makefile: Make 'configure --with-expat=path' actually work
While the configure script sets the EXPATDIR environment variable to
whatever value was passed to its option --with-expat as the prefix of
the location of the expat library and headers, the Makefile ignored it.
This patch fixes this bug.

Signed-off-by: Serge van den Boom <svdb@stack.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 13:30:20 -08:00
Jeff King
f172f334fd git: s/run_command/run_builtin/
There is a static function called run_command which
conflicts with the library function in run-command.c; this
isn't a problem currently, but prevents including
run-command.h in git.c.

This patch just renames the static function to something
more specific and non-conflicting.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 13:16:30 -08:00
Jake Goulding
32c35cfb1e git-tag: Add --contains option
This functions similarly to "git branch --contains"; it will show all
tags that contain the specified commit, by sharing the same logic.

The patch also adds documentation and tests for the new option.

Signed-off-by: Jake Goulding <goulding@vivisimo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 11:33:51 -08:00
Jake Goulding
7fcdb36e29 Make has_commit() non-static
Move has_commit() from branch to a common location, in preparation for
using it in "git-tag". Rename it to is_descendant_of() to make it more
unique and descriptive.

Signed-off-by: Jake Goulding <goulding@vivisimo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 11:33:03 -08:00
Jake Goulding
269defdf30 Make opt_parse_with_commit() non-static
Moving opt_parse_with_commit() from branch to a common location, in
preparation for using it in tag. Rename it to match naming convention
of other option parsing functions.

Signed-off-by: Jake Goulding <goulding@vivisimo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 11:32:27 -08:00
Junio C Hamano
aeeae1b771 revision traversal: allow UNINTERESTING objects to be missing
Most of the existing codepaths were meant to treat missing uninteresting
objects to be a silently ignored non-error, but there were a few places
in handle_commit() and add_parents_to_list(), which are two key functions
in the revision traversal machinery, that cared:

 - When a tag refers to an object that we do not have, we barfed.  We
   ignore such a tag if it is painted as UNINTERESTING with this change.

 - When digging deeper into the ancestry chain of a commit that is already
   painted as UNINTERESTING, in order to paint its parents UNINTERESTING,
   we barfed if parse_parent() for a parent commit object failed.  We can
   ignore such a parent commit object.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 11:00:28 -08:00
Jay Soffian
98ef23b3b1 git-am: minor cleanups
Update usage statement to remove a no-longer supported option, and to hide two
options (one a no-op, one internal) unless --help-all is used.

Use "test -t 0" instead of "tty -s" to detect when stdin is a terminal. (test
-t 0 is used elsewhere in git-am and in other git shell scripts, tty -s is
not, and appears to be deprecated by POSIX)

Use "test ..." instead of "[ ... ]" and "die <msg>" instead of "echo <msg>
>&2; exit 1" to be consistent with rest of script.

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 10:53:34 -08:00
Johannes Sixt
d04099382b Windows: Fix intermittent failures of t7701
The last test case checks whether unpacked objects receive the time stamp
of the pack file. Due to different implementations of stat(2) by MSYS and
our version in compat/mingw.c, the test fails in about half of the test
runs.

Note the following facts:

- The test uses perl's -M operator to compare the time stamps. Since we
  depend on MSYS perl, the result of this operator is based on MSYS's
  implementation of the stat(2) call.

- NTFS on Windows records fractional seconds.

- The MSYS implementation of stat(2) *rounds* fractional seconds to full
  seconds instead of truncating them. This becomes obvious by comparing the
  modification times reported by 'ls --full-time $f' and 'stat $f' for
  various files $f.

- Our implementation of stat(2) in compat/mingw.c *truncates* to full
  seconds.

The consequence of this is that

- add_packed_git() picks up a truncated whole second modification time
  from the pack file time stamp, which is then used for the loose objects,
  while the pack file retains its time stamp in fractional seconds;

- but the test case compared the pack file's rounded modification times
  to the loose objects' truncated modification times.

And half of the time the rounded modification time is not the same as its
truncated modification time.

The fix is that we replace perl by 'test-chmtime -v +0', which prints the
truncated whole-second mtime without modifying it.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-28 10:31:04 -08:00
Junio C Hamano
297f6a535c Merge branch 'maint'
* maint:
  send-pack: do not send unknown object name from ".have" to pack-objects
  test-path-utils: Fix off by one, found by valgrind
  get_sha1_basic(): fix invalid memory access, found by valgrind
2009-01-28 00:36:52 -08:00
Junio C Hamano
02322e1619 send-pack: do not send unknown object name from ".have" to pack-objects
v1.6.1 introduced ".have" extension to the protocol to allow the receiving
side to advertise objects that are reachable from refs in the repositories
it borrows from.  This was meant to be used by the sending side to avoid
sending such objects; they are already available through the alternates
mechanism.

The client side implementation in v1.6.1, which was introduced with
40c155f (push: prepare sender to receive extended ref information from the
receiver, 2008-09-09) aka v1.6.1-rc1~203^2~1, were faulty in that it did
not consider the possiblity that the repository receiver borrows from
might have objects it does not know about.

This fixes it by refraining from passing missing commits to underlying
pack-objects.  Revision machinery may need to be tightened further to
treat missing uninteresting objects as non-error events, but this is an
obvious and safe fix for a maintenance release that is almost good enough.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 23:46:59 -08:00
Junio C Hamano
899d8dc392 Merge branch 'maint-1.6.0' into maint
* maint-1.6.0:
  test-path-utils: Fix off by one, found by valgrind
  get_sha1_basic(): fix invalid memory access, found by valgrind
2009-01-27 15:23:46 -08:00
Johannes Schindelin
b8469ad057 test-path-utils: Fix off by one, found by valgrind
When normalizing an absolute path, we might have to add a slash _and_ a
NUL to the buffer, so the buffer was one too small.

Let's just future proof the code and alloc PATH_MAX + 1 bytes.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 15:16:41 -08:00
Johannes Schindelin
f265458f61 get_sha1_basic(): fix invalid memory access, found by valgrind
When get_sha1_basic() is passed a buffer of len 0, it should not
check if buf[len-1] is a curly bracket.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 15:16:31 -08:00
Charles Bailey
0ec7b6c26d mergetool: respect autocrlf by using checkout-index
Previously, git mergetool used cat-file which does not perform git to
worktree conversion. This changes mergetool to use git checkout-index
instead which means that the temporary files used for mergetool use the
correct line endings for the platform.

Signed-off-by: Charles Bailey <charles@hashpling.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 01:13:19 -08:00
Johannes Gilger
fb700cb067 mergetool: Don't repeat merge tool candidates
git mergetool listed some candidates for mergetools twice, depending on
the environment.

This slightly changes the behavior when both KDE_FULL_SESSION and
GNOME_DESKTOP_SESSION_ID are set at the same time; in such a case
meld is used in favor of kdiff3 (the old code favored kdiff3 in such a
case), but it should not matter in practice.

Signed-off-by: Johannes Gilger <heipei@hackvalue.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 01:11:59 -08:00
Junio C Hamano
90b23e5f21 Merge branch 'jc/maint-1.6.0-split-diff-metainfo' into jc/maint-split-diff-metainfo
This is an evil merge, as a test added since 1.6.0 expects an incorrect
behaviour the merged commit fixes.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 01:08:02 -08:00
Junio C Hamano
b67b9612e1 diff.c: output correct index lines for a split diff
A patch that changes the filetype (e.g. regular file to symlink) of a path
must be split into a deletion event followed by a creation event, which
means that we need to have two independent metainfo lines for each.
However, the code reused the single set of metainfo lines.

As the blob object names recorded on the index lines are usually not used
nor validated on the receiving end, this is not an issue with normal use
of the resulting patch.  However, when accepting a binary patch to delete
a blob, git-apply verified that the postimage blob object name on the
index line is 0{40}, hence a patch that deletes a regular file blob that
records binary contents to create a blob with different filetype (e.g. a
symbolic link) failed to apply.  "git am -3" also uses the blob object
names recorded on the index line, so it would also misbehave when
synthesizing a preimage tree.

This moves the code to generate metainfo lines around, so that two
independent sets of metainfo lines are used for the split halves.

Additional tests by Jeff King.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-27 00:48:00 -08:00
Junio C Hamano
2d6061537f tests: Avoid single-shot environment export for shell function invocation
Some shells have issues with a single-shot environment variable export
when invoking a shell function.  This fixes the ones I found that invoke
test_must_fail that way.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 21:33:51 -08:00
Junio C Hamano
a6c7a27691 rebase -i: correctly remember --root flag across --continue
d911d14 (rebase -i: learn to rebase root commit, 2009-01-02) tried to
remember the --root flag across a merge conflict in a broken way.
Introduce a flag file $DOTEST/rebase-root to fix and clarify.

While at it, also make sure $UPSTREAM is always initialized to guard
against existing values in the environment.

[tr: added tests]

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 21:23:19 -08:00
Ted Pavlic
f7d9d04e3b make: Remove -pthread on Darwin (it is included by cstdlib).
As discussed in

http://lists.apple.com/archives/Unix-porting/2005/Mar/msg00019.html

the Mac OS X C standard library is always thread safe and always
includes the pthread library. So explicitly using -pthread causes an
'unrecognized option' compiler warning.

This patch clears PTHREAD_LIBS if Darwin is detected.

Signed-off-by: Ted Pavlic <ted@tedpavlic.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 15:11:37 -08:00
Nanako Shiraishi
dfb047b9e4 Mention "local convention" rule in the CodingGuidelines
The document suggests to imitate the existing code, but didn't
say which existing code it should imitate. This clarifies.

Signed-off-by: しらいしななこ <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:35:58 -08:00
Steffen Prohaska
2565522174 Windows: Revert to default paths and convert them by RUNTIME_PREFIX
The RUNTIME_PREFIX mechanism allows us to use the default paths on
Windows too.  Defining RUNTIME_PREFIX explicitly requests for
translation of paths relative to the executable at runtime.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00
Steffen Prohaska
35fb0e8633 Compute prefix at runtime if RUNTIME_PREFIX is set
This commit adds support for relocatable binaries (called
RUNTIME_PREFIX).  Such binaries can be moved together with the
system configuration files to a different directory, as long as the
relative paths from the binary to the configuration files is
preserved.  This functionality is essential on Windows where we
deliver git binaries with an installer that allows to freely choose
the installation location.

If RUNTIME_PREFIX is unset we use the static prefix.  This will be
the default on Unix.  Thus, the behavior on Unix will remain
identical to the old implementation, which used to add the prefix
in the Makefile.

If RUNTIME_PREFIX is set the prefix is computed from the location
of the executable.  In this case, system_path() tries to strip
known directories that executables can be located in from the path
of the executable.  If the path is successfully stripped it is used
as the prefix.  For example, if the executable is
"/msysgit/bin/git" and BINDIR is "bin", then the prefix computed is
"/msysgit".

If the runtime prefix computation fails, we fall back to the static
prefix specified in the makefile.  This can be the case if the
executable is not installed at a known location.  Note that our
test system sets GIT_CONFIG_NOSYSTEM to tell git to ignore global
configuration files during testing.  Hence testing does not trigger
the fall back.

Note that RUNTIME_PREFIX only works on Windows, though adding
support on Unix should not be too hard.  The implementation
requires argv0_path to be set to an absolute path.  argv0_path must
point to the directory of the executable.  We use assert() to
verify this in debug builds.  On Windows, the wrapper for main()
(see compat/mingw.h) guarantees that argv0_path is correctly
initialized.  On Unix, further work is required before
RUNTIME_PREFIX can be enabled.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00
Steffen Prohaska
8e3462837b Modify setup_path() to only add git_exec_path() to PATH
Searching git programs only in the highest priority location is
sufficient.  It does not make sense that some of the required
programs are located at the highest priority location but other
programs are picked up from a lower priority exec-path.  If
exec-path is overridden a complete set of commands should be
provided, otherwise several different versions could get mixed,
which is likely to cause confusion.

If a user explicitly overrides the default location (by --exec-path
or GIT_EXEC_PATH), we now expect that all the required programs are
found there.  Instead of adding the directories "argv_exec_path",
"getenv(EXEC_PATH_ENVIRONMENT)", and "system_path(GIT_EXEC_PATH)"
to PATH, we now rely on git_exec_path(), which implements the same
order, but only returns the highest priority location to search for
executables.

Accessing only the location with highest priority is also required
for testing executables built with RUNTIME_PREFIX.  The call to
system_path() should be avoided if RUNTIME_PREFIX is set and the
executable is not installed at its final destination.  Because we
test before installing, we want to avoid calling system_path()
during tests.  The modifications in this commit avoid calling
system_path(GIT_EXEC_PATH) if a higher-priority location is
provided, which is the case when running the tests.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00
Steffen Prohaska
2fb3f6db96 Add calls to git_extract_argv0_path() in programs that call git_config_*
Programs that use git_config need to find the global configuration.
When runtime prefix computation is enabled, this requires that
git_extract_argv0_path() is called early in the program's main().

This commit adds the necessary calls.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00
Steffen Prohaska
2cd72b0b29 git_extract_argv0_path(): Move check for valid argv0 from caller to callee
This simplifies the calling code.

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00
Steve Haslam
4dd47c3b86 Refactor git_set_argv0_path() to git_extract_argv0_path()
This commit moves the code that computes the dirname of argv[0]
from git.c's main() to git_set_argv0_path() and renames the function
to git_extract_argv0_path().  This makes the code in git.c's main
less cluttered, and we can use the dirname computation from other
main() functions too.

[ spr:
 - split Steve's original commit and wrote new commit message.
 - Integrated Johannes Schindelin's
   cca1704897 while rebasing onto master.
]

Signed-off-by: Steve Haslam <shaslam@lastminute.com>
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-26 00:26:05 -08:00