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Author SHA1 Message Date
Miklos Vajna
3d78d1f18f Builtin git-help.
This patch splits out git-help's functions to builtin-help.c and leaves
only functions used by other builtins in help.c.

First this removes git-help's functions from libgit which are not
interesting for other builtins, second this makes 'git help help' work
again.

Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 18:06:37 -07:00
Mikael Magnusson
d049f6c27a git-gui: Update swedish translation.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-08-02 16:53:15 -07:00
Giuseppe Bilotta
807d869453 diff: chapter and part in funcname for tex
This patch enhances the tex funcname by adding support for
chapter and part sectioning commands. It also matches
the starred version of the sectioning commands.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:40:57 -07:00
Avery Pennarun
b50005b79f Teach "git diff -p" Pascal/Delphi funcname pattern
Finds classes, records, functions, procedures, and sections.  Most lines
need to start at the first column, or else there's no way to differentiate
a procedure's definition from its declaration.

Signed-off-by: Avery Pennarun <apenwarr@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:39:35 -07:00
Giuseppe Bilotta
ad8c1d9260 diff: add ruby funcname pattern
Provide a regexp that catches class, module and method definitions in
Ruby scripts, since the built-in default only finds classes.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:38:14 -07:00
Jon Jensen
5cbef01aab Fix reference to Everyday Git, which is an HTML document and not a man page.
Signed-off-by: Jon Jensen <jon@endpoint.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:35:45 -07:00
Lee Marlow
e49b99a6f5 bash completion: Add more long options for 'git log'
Options added: --parents --children --full-history

Signed-off-by: Lee Marlow <lee.marlow@gmail.com>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:22:10 -07:00
Lee Marlow
7339479c2b bash completion: remove unused function _git_diff_tree
completion for git diff-tree was removed in 5cfb4fe

Signed-off-by: Lee Marlow <lee.marlow@gmail.com>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:22:10 -07:00
Johannes Schindelin
bc699afcce clone: Add an option to set up a mirror
The command line

	$ git clone --mirror $URL

is now a short-hand for

	$ git clone --bare $URL
	$ (cd $(basename $URL) && git remote add --mirror origin $URL)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 15:21:59 -07:00
Shawn O. Pearce
1be7bf6e33 git-gui: Update git-gui.pot for 0.11 nearing release
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-08-02 14:48:33 -07:00
Christian Stimming
1e5ed425f3 git-gui: Update German translation
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-08-02 14:09:41 -07:00
Junio C Hamano
372c767610 Merge branch 'maint'
* maint:
  git-name-rev: allow --name-only in combination with --stdin
  builtin-name-rev.c: split deeply nested part from the main function

Conflicts:
	Documentation/git-name-rev.txt
2008-08-02 11:58:34 -07:00
Pieter de Bie
b003c00b7b git-name-rev: allow --name-only in combination with --stdin
Signed-off-by: Pieter de Bie <pdebie@ai.rug.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 11:07:50 -07:00
Junio C Hamano
e8b55fab62 builtin-name-rev.c: split deeply nested part from the main function
The main function of this command implementation tries to do too many
things.  Split out a handling of single input line into a separate
function to reduce nesting level and clutter.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 11:04:22 -07:00
Junio C Hamano
6546b5931e revision traversal: show full history with merge simplification
The --full-history traversal keeps all merges in addition to non-merge
commits that touch paths in the given pathspec.  This is useful to view
both sides of a merge in a topology like this:

        A---M---o
       /   /
   ---O---B

even when A and B makes identical change to the given paths.  The revision
traversal without --full-history aims to come up with the simplest history
to explain the final state of the tree, and one of the side branches can
be pruned away.

The behaviour to keep all merges however is inconvenient if neither A nor
B touches the paths we are interested in.  --full-history reduces the
topology to:

   ---O---M---o

in such a case, without removing M.

This adds a post processing phase on top of --full-history traversal to
remove needless merges from the resulting history.

The idea is to compute, for each commit in the "full history" result set,
the commit that should replace it in the simplified history.  The commit
to replace it in the final history is determined as follows:

 * In any case, we first figure out the replacement commits of parents of
   the commit we are looking at.  The commit we are looking at is
   rewritten as if the replacement commits of its original parents are its
   parents.  While doing so, we reduce the redundant parents from the
   rewritten parent list by not just removing the identical ones, but also
   removing a parent that is an ancestor of another parent.

 * After the above parent simplification, if the commit is a root commit,
   an UNINTERESTING commit, a merge commit, or modifies the paths we are
   interested in, then the replacement commit of the commit is itself.  In
   other words, such a commit is not dropped from the final result.

The first point above essentially means that the history is rewritten in
the bottom up direction.  We can rewrite the parent list of a commit only
after we know how all of its parents are rewritten.  This means that the
processing needs to happen on the full history (i.e. after limit_list()).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 00:33:15 -07:00
Junio C Hamano
60d30b02fc revision.c: whitespace fix
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-02 00:33:14 -07:00
Junio C Hamano
2b603260f3 Merge branch 'maint' 2008-08-01 23:55:51 -07:00
Junio C Hamano
e124554796 Start 1.5.6.5 RelNotes to describe accumulated fixes
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:54:01 -07:00
Ciaran McCreesh
69c231f473 Make git-add -i accept ranges like 7-
git-add -i ranges expect number-number. But for the supremely lazy, typing in
that second number when selecting "from patch 7 to the end" is wasted effort.
So treat an empty second number in a range as "until the last item".

Signed-off-by: Ciaran McCreesh <ciaran.mccreesh@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:26:40 -07:00
Junio C Hamano
1ceb95c804 Update my e-mail address
The old cox.net address is still getting mails from gitters.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:21:44 -07:00
Jonathan Nieder
61d47feec6 git-diff(1): "--c" -> "--cc" typo fix
git diff does not take a --c option.

Signed-off-by: Jonathan Nieder <jrnieder@uchicago.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:21:23 -07:00
Pierre Habouzit
00332b8152 git-submodule: move ill placed shift.
When running git submodule update -i, the "-i" is shifted before recursing
into cmd_init and then again outside of the loop. This causes some /bin/sh
to complain about shifting when there are no arguments left (and would
discard anything written after -i too).

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:16:38 -07:00
Brandon Casey
734a6ffafb t/t4202-log.sh: add newline at end of file
Some shells hang when parsing the script if the last statement is not
followed by a newline. So add one.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:15:02 -07:00
Johannes Schindelin
11ee57bc4c sort_in_topological_order(): avoid setting a commit flag
We used to set the TOPOSORT flag of commits during the topological
sorting, but we can just as well use the member "indegree" for it:
indegree is now incremented by 1 in the cases where the commit used
to have the TOPOSORT flag.

This is the same behavior as before, since indegree could not be
non-zero when TOPOSORT was unset.

Incidentally, this fixes the bug in show-branch where the 8th column
was not shown: show-branch sorts the commits in topological order,
assuming that all the commit flags are available for show-branch's
private matters.

But this was not true: TOPOSORT was identical to the flag corresponding
to the 8th ref.  So the flags for the 8th column were unset by the
topological sorting.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:14:22 -07:00
Junio C Hamano
b1264da863 Documentation: clarify diff --cc
The definition of an "uninteresting" hunk was not in line with reality.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 23:00:42 -07:00
Steve Haslam
31f4e768a4 Propagate -u/--upload-pack option of "git clone" to transport.
The -u option to override the remote system's path to git-upload-pack was
being ignored by "git clone"; caused by a missing call to
transport_set_option to set TRANS_OPT_UPLOADPACK. Presumably this crept in
when git-clone was converted from shell to C.

Signed-off-by: Steve Haslam <shaslam@lastminute.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 22:49:25 -07:00
Anders Melchiorsen
bbff8aaaf2 Documentation: fix diff.external example
The diff.external examples pass a flag to gnu-diff, but GNU diff
does not follow the GIT_EXTERNAL_DIFF interface.

Signed-off-by: Anders Melchiorsen <mail@cup.kalibalik.dk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 22:45:27 -07:00
Junio C Hamano
b2a5627651 make sure parsed wildcard refspec ends with slash
A wildcard refspec is internally parsed into a refspec structure with src
and dst strings.  Many parts of the code assumed that these do not include
the trailing "/*" when matching the wildcard pattern with an actual ref we
see at the remote.  What this meant was that we needed to make sure not
just that the prefix matched, and also that a slash followed the part that
matched.

But a codepath that scans the result from ls-remote and finds matching
refs forgot to check the "matching part must be followed by a slash" rule.
This resulted in "refs/heads/b1" from the remote side to mistakenly match
the source side of "refs/heads/b/*:refs/remotes/b/*" refspec.

Worse, the refspec crafted internally by "git-clone", and a hardcoded
preparsed refspec that is used to implement "git-fetch --tags", violated
this "parsed widcard refspec does not end with slash" rule; simply adding
the "matching part must be followed by a slash" rule then would have
broken codepaths that use these refspecs.

This commit changes the rule to require a trailing slash to parsed
wildcard refspecs.  IOW, "refs/heads/b/*:refs/remotes/b/*" is parsed as
src = "refs/heads/b/" and dst = "refs/remotes/b/".  This allows us to
simplify the matching logic because we only need to do a prefixcmp() to
notice "refs/heads/b/one" matches and "refs/heads/b1" does not.

Acked-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 22:41:15 -07:00
Jeff King
d65d2b2fb4 init: handle empty "template" parameter
If a user passes "--template=", then our template parameter
is blank. Unfortunately, copy_templates() assumes it has at
least one character, and does all sorts of bad things like
reading from template[-1] and then proceeding to link all of
'/' into the .git directory.

This patch just checks for that condition in copy_templates
and aborts. As a side effect, this means that --template=
now has the meaning "don't copy any templates."

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 22:41:07 -07:00
Stephan Beyer
1e5f7add98 builtin-revert.c: typofix
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-01 21:10:40 -07:00
Pierre Habouzit
0fe8c13810 Allow "non-option" revision options in parse_option-enabled commands
Commands which use parse_options() but also call setup_revisions()
must do their parsing in a two step process:

  1. first, they parse all options. Anything unknown goes to
     parse_revision_opt() (which calls handle_revision_opt), which
     may claim the option or say "I don't recognize this"

  2. the non-option remainder goes to setup_revisions() to
     actually get turned into revisions

Some revision options are "non-options" in that they must be
parsed in order with their revision counterparts in
setup_revisions().  For example, "--all" functions as a
pseudo-option expanding to all refs, and "--no-walk" affects refs
after it on the command line, but not before. The revision option
parser in step 1 recognizes such options and sets them aside for
later parsing by setup_revisions().

However, the return value used from handle_revision_opt indicated
"I didn't recognize this", which was wrong. It did, and it took
appropriate action (even though that action was just deferring it
for later parsing). Thus it should return "yes, I recognized
this."

Previously, these pseudo-options generated an error when used with
parse_options parsers (currently just blame and shortlog). With
this patch, they should work fine, enabling things like "git
shortlog --all".

Signed-off-by: Jeff King <peff@peff.net>
Acked-By: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-31 11:35:17 -07:00
Junio C Hamano
b3123f9802 Teach --find-copies-harder to "git blame"
It's equivalent to "-C -C" with the diff family.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-31 11:22:12 -07:00
Jeff King
fdc7c81111 Compact commit template message
We recently let the user know explicitly that an empty
commit message will abort the commit. However, this adds yet
another line to the template; let's rephrase and re-wrap so
that this fits back on two lines.

This patch also makes the "fatal: empty commit message?"
warning a bit less scary, since this is now a "feature"
instead of an error. However, we retain the non-zero exit
status to indicate to callers that nothing was committed.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-31 11:20:13 -07:00
Alexander Gavrilov
835e62aef8 gitk: Fallback to selecting the head commit upon load
Try selecting the head, if the previously selected commit
is not available in the new view.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Alexander Gavrilov
567c34e0ed gitk: Fixed automatic row selection during load
- Switching views now actually preserves the selected commit.
- Reloading (also Edit View) preserves the currently selected commit.
- Initial selection does not produce weird scrolling.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Alexander Gavrilov
7272131b3e gitk: Fixed broken exception handling in diff
If the tree diff command failed to start for some
random reason, treepending remained set, and thus
no more diffs were shown after that.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Alexander Gavrilov
b6326e92ef gitk: On Windows, use a Cygwin-specific flag for kill
MSysGit compiles git binaries as native Windows executables,
so they cannot be killed unless a special flag is specified.

This flag is implemented by the Cygwin version of kill,
which is also included in MSysGit.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Alexander Gavrilov
e439e092b8 gitk: Arrange to kill diff-files & diff-index on quit
Local change analysis can take a noticeable amount of time on large
file sets, and produce no output if there are no changes.  Register
the back-ends in commfd, so that they get properly killed on window
close.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Alexander Gavrilov
e2f90ee45c gitk: Kill back-end processes on window close
When collecting commits for a rarely changed, or recently
created file or directory, rev-list may work for a noticeable
period of time without producing any output.  Such processes
don't receive SIGPIPE for a while after gitk is closed, thus
becoming runaway CPU hogs.

Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-31 20:29:44 +10:00
Abhijit Menon-Sen
f448e24e2f Make the DESCRIPTION match <x>... items in the SYNOPSIS
When the SYNOPSIS says e.g. "<path>...", it is nice if the DESCRIPTION
also mentions "<path>..." and says the specified "paths" (note plural)
are used for $whatever. This fixes the obvious mismatches.

Signed-off-by: Abhijit Menon-Sen <ams@toroid.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 21:42:55 -07:00
Christian Couder
0e25790f1d documentation: user-manual: update "using-bisect" section
Since version 1.5.6 "git bisect" doesn't use a "bisect" branch any
more, but the user manual had not been updated to reflect this.

So this patch does that and while at it also adds a few words about
"git bisect skip" and points user to the "git bisect" man page for
more information.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 21:42:20 -07:00
Miklos Vajna
6e4a86d2ed builtin-help: always load_command_list() in cmd_help()
When cmd_help() is called, we always need the list of main and other
commands, not just when the list of all commands is shown. Before this
patch 'git help diff' invoked 'man gitdiff' because cmd_to_page()
thought 'diff' is not a git command.

Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 21:38:18 -07:00
Junio C Hamano
c4aca9ccda Fix test-parse-options "integer" test
OPT_INTEGER() works on an integer, not on an unsigned long.  On a big
endian architecture with long larger than int, integer test gives bogus
results because of this bug.

Reported by H.Merijn Brand in HP-UX 64-bit environment.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 12:53:45 -07:00
Todd Zullinger
5354a56fe7 Replace uses of "git-var" with "git var"
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 11:42:01 -07:00
Junio C Hamano
9b6bf4d575 Fix merge name generation in "merge in C"
When merging an early part of a branch, e.g. "git merge xyzzy~20", we were
supposed to say "branch 'xyzzy' (early part)", but it incorrectly said
"branch 'refs/heads/xy' (early part)" instead.

The logic was supposed to first strip away "~20" part to make sure that
what follows "~" is a non-zero posint, prefix it with "refs/heads/" and
ask resolve_ref() if it is a ref.  If it is, then we know xyzzy was a
branch, and we can give the correct message.

However, there were a few bugs.  First of all, the logic to build this
"true branch refname" did not count the characters correctly.  At this
point of the code, "len" is the number of trailing, non-name part of the
given extended SHA-1 expression given by the user, i.e. number of bytes in
"~20" in the above example.

In addition, the message forgot to skip "refs/heads/" it prefixed from the
output.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 01:13:26 -07:00
Junio C Hamano
c5dc9a2829 git-merge-octopus: use (merge-base A (merge B C D E...)) for stepwise merge
Suppose you have this topology, and you are trying to make an octopus
across A, B and C (you are at C and merging A and B into your branch).
The protoccol between "git merge" and merge strategies is for the former
to pass common ancestor(s), '--' and then commits being merged.

git-merge-octopus does not produce the final merge in one-go.  It
iteratively produces pairwise merges.  So the first step might be to come
up with a merge between B and C:

               o---o---o---o---C
              /                 :
             /   o---o---o---B..(M)
            /   /
        ---1---2---o---o---o---A

and for that, "1" is used as the merge base, not because it is the base
across A, B and C but because it is the base between B and C.  For this
merge, A does not matter.

I drew M in parentheses and lines between B and C to it in dotted line
because we actually do _not_ create a real commit --- the only thing we
need is a tree object, in order to proceed to the next step.

Then the final merge result is obtained by merging tree of (M) and A using
their common ancestor.  For that, we _could_ still use "1" as the merge
base.

But if you imagine a case where you started from A and M, you would _not_
pick "1" as the merge base; you would rather use "2" which is a better
base for this merge.

That is why git-merge-octopus ignores the merge base given by "merge" but
computes its own.

The comment at the end of git-merge-octopus talks about "merge reference
commit", that we used to update it to common found in this round, and that
that updating was pointless.  After the first round of merge to produce
the tree for M (but without actually creating the commit object M itself),
in order to figure out the merge base used to merge that with A in the
second round, we used to use A and "1" (which was merge base between B and
C).  That was pointless --- "merge-base A 1" is guaranteed to give a base
that is no better than either "merge-base A B" or "merge-base A C".  So
the current code keeps using the original head (iow, MRC=C, because in
this case we are starting from C and merging B and then A into it).

This trickerly was necessary only because we avoided creating the extra
merge commit object M.

	Side note.  An alternative implementation could have been to
	actually record it as a real merge commit M, and then let the
	two-commit merge-base compute the base between A and M when
	merging A to the result of the previous round, but we avoided
	creating M, at the expense of potentially using suboptimal base in
	the later rounds.

But we do not have to be that pessimistic.  We can instead accumulate the
commits we have merged so far in MRC, and have merge_bases_many() compute
the merge base for the new head being merged and the heads we have
processed so far, which can give a better base than what we currently do.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 00:20:51 -07:00
Cesar Eduardo Barros
81b237d5db Documentation/git-rev-parse.txt: update for new git-describe output format
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 00:19:22 -07:00
Junio C Hamano
731ab1f55e Merge git://repo.or.cz/git-gui
* git://repo.or.cz/git-gui:
  git-gui (Windows): Change wrapper to execdir 'libexec/git-core'
  git-gui (Windows): Switch to relative discovery of oguilib
  git-gui: Correct installation of library to be $prefix/share
  git-gui: Fix gitk search in $PATH to work on Windows
  git-gui: Preserve scroll position on reshow_diff.
  git-gui: Fix the Remote menu separator.
2008-07-30 00:18:26 -07:00
Rene Scharfe
4fac1d3a98 archive: allow --exec and --remote without equal sign
Convert git archive to parse_options().  The parameters --remote and --exec
are still handled by their special parser.  Define them anyway in order for
them to show up in the usage notice.

Note: in a command like "git archive --prefix --remote=a/ HEAD", the string
"--remote=a/" will be interpreted as a remote option, not a prefix, because
that special parser sees it first.  If one needs such a strange prefix, it
needs to be specified like this: "git archive --prefix=--remote=a/ HEAD"
(with an equal sign).

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 00:15:14 -07:00
Junio C Hamano
c70115b4b1 Teach gitlinks to ie_modified() and ce_modified_check_fs()
The ie_modified() function is the workhorse for refresh_cache_entry(),
i.e. checking if an index entry that is stat-dirty actually has changes.

After running quicker check to compare cached stat information with
results from the latest lstat(2) to answer "has modification" early, the
code goes on to check if there really is a change by comparing the staged
data with what is on the filesystem by asking ce_modified_check_fs().
However, this function always said "no change" for any gitlinks that has a
directory at the corresponding path.  This made ie_modified() to miss
actual changes in the subproject.

The patch fixes this first by modifying an existing short-circuit logic
before calling the ce_modified_check_fs() function.  It knows that for any
filesystem entity to which ie_match_stat() says its data has changed, if
its cached size is nonzero then the contents cannot match, which is a
correct optimization only for blob objects.  We teach gitlink objects to
this special case, as we already know that any gitlink that
ie_match_stat() says is modified is indeed modified at this point in the
codepath.

With the above change, we could leave ce_modified_check_fs() broken, but
it also futureproofs the code by teaching it to use ce_compare_gitlink(),
instead of assuming (incorrectly) that any directory is unchanged.

Originally noticed by Alex Riesen on Cygwin.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-30 00:09:22 -07:00