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Author SHA1 Message Date
Junio C Hamano
0fdd7f5d73 Sync with 1.8.1.2 2013-01-28 11:18:32 -08:00
Junio C Hamano
53cdd4e1b2 Git 1.8.1.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-28 11:17:54 -08:00
Junio C Hamano
a77133e383 Merge branch 'ss/help-htmlpath-config-doc' into maint
* ss/help-htmlpath-config-doc:
  config.txt: Document help.htmlpath config parameter
2013-01-28 11:13:31 -08:00
Junio C Hamano
6d7c1c8894 Merge branch 'nd/attr-debug-fix' into maint
* nd/attr-debug-fix:
  attr: make it build with DEBUG_ATTR again
2013-01-28 11:13:07 -08:00
Junio C Hamano
7025616048 Merge branch 'ds/completion-silence-in-tree-path-probe' into maint
* ds/completion-silence-in-tree-path-probe:
  git-completion.bash: silence "not a valid object" errors
2013-01-28 11:12:47 -08:00
Junio C Hamano
095d65d73b Merge branch 'jn/maint-trim-vim-contrib' into maint
* jn/maint-trim-vim-contrib:
  contrib/vim: simplify instructions for old vim support
2013-01-28 11:12:36 -08:00
Junio C Hamano
a94214b75e Merge branch 'pe/doc-email-env-is-trumped-by-config' into maint
* pe/doc-email-env-is-trumped-by-config:
  git-commit-tree(1): correct description of defaults
2013-01-28 11:12:31 -08:00
Junio C Hamano
c1640aa5d3 Merge branch 'mk/complete-tcsh' into maint
Command line completion for "tcsh" emitted an unwanted space
after completing a single directory name.

* mk/complete-tcsh:
  Prevent space after directories in tcsh completion
2013-01-28 11:11:51 -08:00
Junio C Hamano
85fd059a89 Merge branch 'ap/status-ignored-in-ignored-directory' into maint
Output from "git status --ignored" did not work well when used with
"--untracked".

* ap/status-ignored-in-ignored-directory:
  status: always report ignored tracked directories
  git-status: Test --ignored behavior
  dir.c: Make git-status --ignored more consistent
2013-01-28 11:10:25 -08:00
Junio C Hamano
3a51e4be9c Merge branch 'er/stop-recommending-parsecvs' into maint
* er/stop-recommending-parsecvs:
  Remove the suggestion to use parsecvs, which is currently broken.
2013-01-28 11:09:37 -08:00
Junio C Hamano
ce956fc48e Merge branch 'mh/ceiling' into maint
An element on GIT_CEILING_DIRECTORIES list that does not name the
real path to a directory (i.e. a symbolic link) could have caused
the GIT_DIR discovery logic to escape the ceiling.

* mh/ceiling:
  string_list_longest_prefix(): remove function
  setup_git_directory_gently_1(): resolve symlinks in ceiling paths
  longest_ancestor_length(): require prefix list entries to be normalized
  longest_ancestor_length(): take a string_list argument for prefixes
  longest_ancestor_length(): use string_list_split()
  Introduce new function real_path_if_valid()
  real_path_internal(): add comment explaining use of cwd
  Introduce new static function real_path_internal()
2013-01-28 11:07:18 -08:00
Junio C Hamano
c96f4212cb Merge branch 'tb/t0050-maint'
Update tests that were expecting to fail due to a bug that was
fixed earlier.

* tb/t0050-maint:
  t0050: Use TAB for indentation
  t0050: honor CASE_INSENSITIVE_FS in add (with different case)
  t0050: known breakage vanished in merge (case change)
2013-01-28 10:59:28 -08:00
Junio C Hamano
738b314a3e Merge branch 'dl/am-hg-locale'
Datestamp recorded in "Hg" format patch was reformatted incorrectly
to an e-mail looking date using locale dependant strftime, causing
patch application to fail.

* dl/am-hg-locale:
  am: invoke perl's strftime in C locale
2013-01-28 10:59:24 -08:00
Junio C Hamano
d959a78d98 Merge branch 'jc/help'
A header file that has the definition of a static array was
included in two places, wasting the space.

* jc/help:
  help: include <common-cmds.h> only in one file
2013-01-28 10:59:15 -08:00
Junio C Hamano
38f7636410 Merge branch 'bc/fix-array-syntax-for-3.0-in-completion-bash'
Fix use of an array notation that older versions of bash do not
understand.

* bc/fix-array-syntax-for-3.0-in-completion-bash:
  git-completion.bash: replace zsh notation that breaks bash 3.X
2013-01-28 10:59:07 -08:00
Matthieu Moy
0fa2eb530f add: warn when -u or -A is used without pathspec
Most Git commands that can be used with or without pathspec operate
tree-wide by default, the pathspec being used to restrict their
scope.  A few exceptions are: 'git grep', 'git clean', 'git add -u'
and 'git add -A'.  When run in a subdirectory without pathspec, they
operate only on paths in the current directory.

The inconsistency of 'git add -u' and 'git add -A' is particularly
problematic since other 'git add' subcommands (namely 'git add -p'
and 'git add -e') are tree-wide by default.  It also means that "git
add -u && git commit" will record a state that is different from
what is recorded with "git commit -a".

Flipping the default now is unacceptable, so let's start training
users to type 'git add -u|-A :/' or 'git add -u|-A .' explicitly, to
prepare for the next steps:

* forbid 'git add -u|-A' without pathspec (like 'git add' without
  option)

* much later, maybe, re-allow 'git add -u|-A' without pathspec, that
  will add all tracked and modified files, or all files, tree-wide.

A nice side effect of this patch is that it makes the :/ magic
pathspec easier to discover for users.

When the command is called from the root of the tree, there is no
ambiguity and no need to change the behavior, hence no need to warn.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-28 10:31:35 -08:00
John Keeping
3ac221a78e git-remote-testpy: fix path hashing on Python 3
When this change was originally made (0846b0c - git-remote-testpy:
hash bytes explicitly , I didn't realise that the "hex" encoding we
chose is a "bytes to bytes" encoding so it just fails with an error
on Python 3 in the same way as the original code.

It is not possible to provide a single code path that works on
Python 2 and Python 3 since Python 2.x will attempt to decode the
string before encoding it, which fails for strings that are not
valid in the default encoding.  Python 3.1 introduced the
"surrogateescape" error handler which handles this correctly and
permits a bytes -> unicode -> bytes round-trip to be lossless.  As
the original came from reading the filesystem path, we convert them
back into the original bytes encoded in sys.getfilesystemencoding().

At this point Python 3.0 is unsupported so we don't go out of our
way to try to support it.

Helped-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-28 09:55:14 -08:00
John Keeping
62957bea0c mergetool--lib: don't call "exit" in setup_tool
This will make it easier to use setup_tool in places where we expect
that the selected tool will not support the current mode.

We need to introduce a new return code for setup_tool to differentiate
between the case of "the selected tool is invalid" and "the selected
tool is not a built-in" since we must call setup_tool when a custom
'merge.<tool>.path' is configured for a built-in tool but avoid failing
when the configured tool is not a built-in.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-27 18:33:16 -08:00
David Aguilar
88d3406ad7 mergetool--lib: improve show_tool_help() output
Check the can_diff and can_merge functions before deciding whether
to add the tool to the available/unavailable lists.  This makes
"--tool-help" context-sensitive so that "git mergetool --tool-help"
displays merge tools only and "git difftool --tool-help" displays
diff tools only.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-27 18:32:54 -08:00
David Aguilar
b2a6b7122e mergetools/vim: remove redundant diff command
vimdiff and vimdiff2 differ only by their merge command so remove the
logic in the diff command since it's not actually needed.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-27 18:32:43 -08:00
Peter Krefting
eec16a65ee l10n: Update Swedish translation (1983t0f0u)
Signed-off-by: Peter Krefting <peter@softwolves.pp.se>
2013-01-27 22:38:51 +01:00
Pete Wyckoff
0d60903293 git p4: introduce gitConfigBool
Make the intent of "--bool" more obvious by returning a direct True
or False value.  Convert a couple non-bool users with obvious bool
intent.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:40 -08:00
Pete Wyckoff
b345d6c3b7 git p4: avoid shell when calling git config
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:40 -08:00
Pete Wyckoff
2abba3014e git p4: avoid shell when invoking git config --get-all
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:40 -08:00
Pete Wyckoff
c7d34884ae git p4: avoid shell when invoking git rev-list
Invoke git rev-list directly, avoiding the shell, in
P4Submit and P4Sync.  The overhead of starting extra
processes is significant in cygwin; this speeds things
up on that platform.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
9bf2885510 git p4: avoid shell when mapping users
The extra quoting and double-% are unneeded, just to work
around the shell.  Instead, avoid the shell indirection.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
d20f0f8e28 git p4: disable read-only attribute before deleting
On windows, p4 marks un-edited files as read-only.  Not only are
they read-only, but also they cannot be deleted.  Remove the
read-only attribute before deleting in both the copy and rename
cases.

This also happens in the RCS cleanup code, where a file is marked
to be deleted, but must first be edited to remove adjust the
keyword lines.  Make sure it is editable before patching.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
4cea4d6608 git p4 test: use test_chmod for cygwin
This test does a commit that is a pure mode change, submits
it to p4 but causes the submit to fail.  It verifies that
the state in p4 as well as the client directory are both
unmodified after the failed submit.

On cygwin, "chmod +x" does nothing, so use the test_chmod
function to modify the index directly too.

Also on cygwin, the executable bit cannot be seen in the
filesystem, so avoid that part of the test.  The checks of
p4 state are still valid, though.

Thanks-to: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
e9df0f9c7a git p4: cygwin p4 client does not mark read-only
There are some old versions of p4, compiled for cygwin, that
treat read-only files differently.

Normally, a file that is not open is read-only, meaning that
"test -w" on the file is false.  This works on unix, and it works
on windows using the NT version of p4.  The cygwin version
of p4, though, changes the permissions, but does not set the
windows read-only attribute, so "test -w" returns false.

Notice this oddity and make the tests work, even on cygiwn.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
9d01ae9f20 git p4 test: avoid wildcard * in windows
This character is not valid in windows filenames, even though
it can appear in p4 depot paths.  Avoid using it in tests on
windows, both mingw and cygwin.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
e93f869593 git p4 test: use LineEnd unix in windows tests too
In all clients, even those created on windows, use unix line
endings.  This makes it possible to verify file contents without
doing OS-specific comparisons in all the tests.

Tests in t9802-git-p4-filetype.sh are used to make sure that
the other LineEnd options continue to work.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
dfbf393700 git p4 test: newline handling
P4 stores newlines in the depos as \n.  By default, git does this
too, both on unix and windows.  Test to make sure that this stays
true.

Both git and p4 have mechanisms to use \r\n in the working
directory.  Exercise these.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
7f0e596276 git p4: scrub crlf for utf16 files on windows
Files of type utf16 are handled with "p4 print" instead of the
normal "p4 -G print" interface due to how the latter does not
produce correct output.  See 55aa571 (git-p4: handle utf16
filetype properly, 2011-09-17) for details.

On windows, though, "p4 print" can not be told which line
endings to use, as there is no underlying client, and always
chooses crlf, even for utf16 files.  Convert the \r\n into \n
when importing utf16 files.

The fix for this is complex, in that the problem is a property
of the NT version of p4.  There are old versions of p4 that
were compiled directly for cygwin that should not be subjected
to text replacement.  The right check here, then, is to look
at the p4 version, not the OS version.  Note also that on cygwin,
platform.system() is "CYGWIN_NT-5.1" or similar, not "Windows".

Add a function to memoize the p4 version string and use it to
check for "/NT", indicating the Windows build of p4.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
bb5ea62d80 git p4: remove unreachable windows \r\n conversion code
Replacing \r\n with \n on windows was added in c1f9197 (Replace
\r\n with \n when importing from p4 on Windows, 2007-05-24), to
work around an oddity with "p4 print" on windows.  Text files
are printed with "\r\r\n" endings, regardless of whether they
were created on unix or windows, and regardless of the client
LineEnd setting.

As of d2c6dd3 (use p4CmdList() to get file contents in Python
dicts. This is more robust., 2007-05-23), git-p4 uses "p4 -G
print", which generates files in a raw format.  As the native
line ending format if p4 is \n, there will be no \r\n in the
raw text.

Actually, it is possible to generate a text file so that the
p4 representation includes embedded \r\n, even though this is not
normal on either windows or unix.  In that case the code would
have mistakenly stripped them out, but now they will be left
intact.

More information on how p4 deals with line endings is here:

    http://kb.perforce.com/article/63

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
cfa96496bd git p4 test: translate windows paths for cygwin
Native windows binaries do not understand posix-like
path mapping offered by cygwin.  Convert paths to native
using "cygpath --windows" before presenting them to p4d.

This is done using the AltRoots mechanism of p4.  Both the
posix and windows forms are put in the client specification,
allowing p4 to find its location by native path even though
the environment reports a different PWD.

Shell operations in tests will use the normal form of $cli,
which will look like a posix path in cygwin, while p4 will
use AltRoots to match against the windows form of the working
directory.

This mechanism also handles the symlink issue that was fixed in
23bd0c9 (git p4 test: use real_path to resolve p4 client
symlinks, 2012-06-27).  Now that every p4 client view has
an AltRoots with the real_path in it, explicitly calculating
the real_path elsewhere is not necessary.

Thanks-to: Sebastian Schuberth <sschuberth@gmail.com>
Thanks-to: Johannes Sixt <j6t@kdbg.org>

fixup! git p4 test: translate windows paths for cygwin

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:39 -08:00
Pete Wyckoff
6492a1041a git p4 test: start p4d inside its db dir
This will avoid having to do native path conversion for
windows.  Also may be a bit cleaner always to know that p4d
has that working directory, instead of wherever the function
was called from.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
50038ba92a git p4 test: use client_view in t9806
Use the standard client_view function from lib-git-p4.sh
instead of building one by hand.  This requires a bit of
rework, using the current value of $P4CLIENT for the client
name.  It also reorganizes the test to isolate changes to
$P4CLIENT and $cli in a subshell.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
6112541b44 git p4 test: avoid loop in client_view
The printf command re-interprets the format string as
long as there are arguments to consume.  Use this to
simplify a for loop in the client_view() library function.

This requires a fix to one of the client_view callers.
An errant \n in the string was converted into a harmless
newline in the input to "p4 client -i", but now shows up
as a literal \n as passed through by "%s".  Remove the \n.

Based-on-patch-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
daa38f4ae0 git p4 test: use client_view to build the initial client
Simplify the code a bit by using an existing function.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
0f487d308d git p4: generate better error message for bad depot path
Depot paths must start with //.  Exit with a better explanation
when a bad depot path is supplied.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
f629fa597c git p4: remove unused imports
Found by "pyflakes" checker tool.
Modules shelve, getopt were unused.
Module os.path is exported by os.
Reformat one-per-line as is PEP008 suggested style.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Pete Wyckoff
4f9273d27b git p4: temp branch name should use / even on windows
Commit fed2369 (git-p4: Search for parent commit on branch creation,
2012-01-25) uses temporary branches to help find the parent of a
new p4 branch.  The temp branches are of the form "git-p4-tmp/%d"
for some p4 change number.  Mistakenly, this string was made
using os.path.join() instead of just string concatenation.  On
windows, this turns into a backslash (\), which is not allowed in
git branch names.

Reported-by: Casey McGinty <casey.mcginty@gmail.com>
Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 22:00:38 -08:00
Junio C Hamano
012a1bb524 Merge branch 'jk/maint-gc-auto-after-fetch' into jk/gc-auto-after-fetch
* jk/maint-gc-auto-after-fetch:
  fetch-pack: avoid repeatedly re-scanning pack directory
  fetch: run gc --auto after fetching
2013-01-26 19:42:09 -08:00
Jeff King
b495697b82 fetch-pack: avoid repeatedly re-scanning pack directory
When we look up a sha1 object for reading via parse_object() =>
read_sha1_file() => read_object() callpath, we first check
packfiles, and then loose objects. If we still haven't found it, we
re-scan the list of packfiles in `objects/pack`. This final step
ensures that we can co-exist with a simultaneous repack process
which creates a new pack and then prunes the old object.

This extra re-scan usually does not have a performance impact for
two reasons:

  1. If an object is missing, then typically the re-scan will find a
     new pack, then no more misses will occur.  Or if it truly is
     missing, then our next step is usually to die().

  2. Re-scanning is cheap enough that we do not even notice.

However, these do not always hold. The assumption in (1) is that the
caller is expecting to find the object. This is usually the case,
but the call to `parse_object` in `everything_local` does not follow
this pattern. It is looking to see whether we have objects that the
remote side is advertising, not something we expect to
have. Therefore if we are fetching from a remote which has many refs
pointing to objects we do not have, we may end up re-scanning the
pack directory many times.

Even with this extra re-scanning, the impact is often not noticeable
due to (2); we just readdir() the packs directory and skip any packs
that are already loaded. However, if there are a large number of
packs, even enumerating the directory can be expensive, especially
if we do it repeatedly.

Having this many packs is a good sign the user should run `git gc`,
but it would still be nice to avoid having to scan the directory at
all.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 19:37:30 -08:00
Jeff King
131b8fcbfb fetch: run gc --auto after fetching
We generally try to run "gc --auto" after any commands that
might introduce a large number of new objects. An obvious
place to do so is after running "fetch", which may introduce
new loose objects or packs (depending on the size of the
fetch).

While an active developer repository will probably
eventually trigger a "gc --auto" on another action (e.g.,
git-rebase), there are two good reasons why it is nicer to
do it at fetch time:

  1. Read-only repositories which track an upstream (e.g., a
     continuous integration server which fetches and builds,
     but never makes new commits) will accrue loose objects
     and small packs, but never coalesce them into a more
     efficient larger pack.

  2. Fetching is often already perceived to be slow to the
     user, since they have to wait on the network. It's much
     more pleasant to include a potentially slow auto-gc as
     part of the already-long network fetch than in the
     middle of productive work with git-rebase or similar.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 19:25:38 -08:00
Sven Strickroth
8bf671946d mergetools: support TortoiseGitMerge
TortoiseMerge.exe was ben renamed to TortoiseGitMerge.exe (starting
with 1.8.0) in order to make it clear that it has special support
for git, and prevent confusion with the TortoiseSVN TortoiseMerge
version.

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 19:01:46 -08:00
Brandon Casey
a235e85cc8 git-p4.py: support Python 2.4
Python 2.4 lacks the following features:

   subprocess.check_call
   struct.pack_into

Take a cue from 460d1026 and provide an implementation of the
CalledProcessError exception.  Then replace the calls to
subproccess.check_call with calls to subprocess.call that check the return
status and raise a CalledProcessError exception if necessary.

The struct.pack_into in t/9802 can be converted into a single struct.pack
call which is available in Python 2.4.

Signed-off-by: Brandon Casey <bcasey@nvidia.com>
Acked-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 19:00:10 -08:00
Brandon Casey
598354c0ad git-p4.py: support Python 2.5
Python 2.5 and older do not accept None as the first argument to
translate() and complain with:

   TypeError: expected a character buffer object

As suggested by Pete Wyckoff, let's just replace the call to translate()
with a regex search which should be more clear and more portable.

This allows git-p4 to be used with Python 2.5.

Signed-off-by: Brandon Casey <bcasey@nvidia.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 19:00:03 -08:00
Jeff King
be5c9fb904 logmsg_reencode: lazily load missing commit buffers
Usually a commit that makes it to logmsg_reencode will have
been parsed, and the commit->buffer struct member will be
valid. However, some code paths will free commit buffers
after having used them (for example, the log traversal
machinery will do so to keep memory usage down).

Most of the time this is fine; log should only show a commit
once, and then exits. However, there are some code paths
where this does not work. At least two are known:

  1. A commit may be shown as part of a regular ref, and
     then it may be shown again as part of a submodule diff
     (e.g., if a repo contains refs to both the superproject
     and subproject).

  2. A notes-cache commit may be shown during "log --all",
     and then later used to access a textconv cache during a
     diff.

Lazily loading in logmsg_reencode does not necessarily catch
all such cases, but it should catch most of them. Users of
the commit buffer tend to be either parsing for structure
(in which they will call parse_commit, and either we will
already have parsed, or we will load commit->buffer lazily
there), or outputting (either to the user, or fetching a
part of the commit message via format_commit_message). In
the latter case, we should always be using logmsg_reencode
anyway (and typically we do so via the pretty-print
machinery).

If there are any cases that this misses, we can fix them up
to use logmsg_reencode (or handle them on a case-by-case
basis if that is inappropriate).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 13:28:22 -08:00
Jeff King
dd0d388c44 logmsg_reencode: never return NULL
The logmsg_reencode function will return the reencoded
commit buffer, or NULL if reencoding failed or no reencoding
was necessary. Since every caller then ends up checking for NULL
and just using the commit's original buffer, anyway, we can
be a bit more helpful and just return that buffer when we
would have returned NULL.

Since the resulting string may or may not need to be freed,
we introduce a logmsg_free, which checks whether the buffer
came from the commit object or not (callers either
implemented the same check already, or kept two separate
pointers, one to mark the buffer to be used, and one for the
to-be-freed string).

Pushing this logic into logmsg_* simplifies the callers, and
will let future patches lazily load the commit buffer in a
single place.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-26 13:28:21 -08:00