user/sven/git.git/diff-lib.c, branch v1.5.4.4

Use is_absolute_path() in diff-lib.c, lockfile.c, setup.c, trace.c

2007-11-26T20:32:05Z

Using the helper function to test for absolute paths makes porting easier. Signed-off-by: Steffen Prohaska Signed-off-by: Junio C Hamano

Merge branch 'ph/diffopts'

2007-11-18T23:50:16Z

* ph/diffopts: Reorder diff_opt_parse options more logically per topics. Make the diff_options bitfields be an unsigned with explicit masks. Use OPT_BIT in builtin-pack-refs Use OPT_BIT in builtin-for-each-ref Use OPT_SET_INT and OPT_BIT in builtin-branch parse-options new features.

Make the diff_options bitfields be an unsigned with explicit masks.

2007-11-12T00:54:15Z

reverse_diff was a bit-value in disguise, it's merged in the flags now. Signed-off-by: Pierre Habouzit Signed-off-by: Junio C Hamano

git-add: make the entry stat-clean after re-adding the same contents

2007-11-10T08:37:39Z

Earlier in commit 0781b8a9b2fe760fc4ed519a3a26e4b9bd6ccffe (add_file_to_index: skip rehashing if the cached stat already matches), add_file_to_index() were taught not to re-add the path if it already matches the index. The change meant well, but was not executed quite right. It used ie_modified() to see if the file on the work tree is really different from the index, and skipped adding the contents if the function says "not modified". This was wrong. There are three possible comparison results between the index and the file in the work tree: - with lstat(2) we _know_ they are different. E.g. if the length or the owner in the cached stat information is different from the length we just obtained from lstat(2), we can tell the file is modified without looking at the actual contents. - with lstat(2) we _know_ they are the same. The same length, the same owner, the same everything (but this has a twist, as described below). - we cannot tell from lstat(2) information alone and need to go to the filesystem to actually compare. The last case arises from what we call 'racy git' situation, that can be caused with this sequence: $ echo hello >file $ git add file $ echo aeiou >file ;# the same length If the second "echo" is done within the same filesystem timestamp granularity as the first "echo", then the timestamp recorded by "git add" and the timestamp we get from lstat(2) will be the same, and we can mistakenly say the file is not modified. The path is called 'racily clean'. We need to reliably detect racily clean paths are in fact modified. To solve this problem, when we write out the index, we mark the index entry that has the same timestamp as the index file itself (that is the time from the point of view of the filesystem) to tell any later code that does the lstat(2) comparison not to trust the cached stat info, and ie_modified() then actually goes to the filesystem to compare the contents for such a path. That's all good, but it should not be used for this "git add" optimization, as the goal of "git add" is to actually update the path in the index and make it stat-clean. With the false optimization, we did _not_ cause any data loss (after all, what we failed to do was only to update the cached stat information), but it made the following sequence leave the file stat dirty: $ echo hello >file $ git add file $ echo hello >file ;# the same contents $ git add file The solution is not to use ie_modified() which goes to the filesystem to see if it is really clean, but instead use ie_match_stat() with "assume racily clean paths are dirty" option, to force re-adding of such a path. There was another problem with "git add -u". The codepath shares the same issue when adding the paths that are found to be modified, but in addition, it asked "git diff-files" machinery run_diff_files() function (which is "git diff-files") to list the paths that are modified. But "git diff-files" machinery uses the same ie_modified() call so that it does not report racily clean _and_ actually clean paths as modified, which is not what we want. The patch allows the callers of run_diff_files() to pass the same "assume racily clean paths are dirty" option, and makes "git-add -u" codepath to use that option, to discover and re-add racily clean _and_ actually clean paths. We could further optimize on top of this patch to differentiate the case where the path really needs re-adding (i.e. the content of the racily clean entry was indeed different) and the case where only the cached stat information needs to be refreshed (i.e. the racily clean entry was actually clean), but I do not think it is worth it. This patch applies to maint and all the way up. Signed-off-by: Junio C Hamano

ce_match_stat, run_diff_files: use symbolic constants for readability

2007-11-10T08:24:51Z

ce_match_stat() can be told: (1) to ignore CE_VALID bit (used under "assume unchanged" mode) and perform the stat comparison anyway; (2) not to perform the contents comparison for racily clean entries and report mismatch of cached stat information; using its "option" parameter. Give them symbolic constants. Similarly, run_diff_files() can be told not to report anything on removed paths. Also give it a symbolic constant for that. Signed-off-by: Junio C Hamano

diff --no-index: do not forget to run diff_setup_done()

2007-09-14T19:12:32Z

Code inspection by Linus found this. Signed-off-by: Junio C Hamano

diff: squelch empty diffs even more

2007-08-15T05:34:58Z

When we compare two non-tracked files, or explicitly specify --no-index, the suggestion to run git-status is not helpful. The patch adds a new diff_options bitfield member, no_index, that is used instead of the special value of -2 of the rev_info field max_count to indicate that the index is not to be used. This makes it possible to pass that flag down to diffcore_skip_stat_unmatch(), which only has one diff_options parameter. This could even become a cleanup if we removed all assignments of max_count to a value of -2 (viz. replacement of a magic value with a self-documenting field name) but I didn't dare to do that so late in the rc game.. The no_index bit, if set, then tells diffcore_skip_stat_unmatch() to not account for any skipped stat-mismatches, which avoids the suggestion to run git-status. Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano

diff-lib.c: don't strdup twice

2007-07-07T18:53:49Z

The static function read_directory in diff-lib.c is only ever called with struct path_list lists with .strdup_paths turned on, i.e. path_list_insert will strdup the paths for us (again). Let's take advantage of that and stop doing it twice. Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano

War on whitespace

2007-06-07T07:04:01Z

This uses "git-apply --whitespace=strip" to fix whitespace errors that have crept in to our source files over time. There are a few files that need to have trailing whitespaces (most notably, test vectors). The results still passes the test, and build result in Documentation/ area is unchanged. Signed-off-by: Junio C Hamano

Merge branch 'lt/gitlink'

2007-04-22T00:21:10Z

* lt/gitlink: Tests for core subproject support Expose subprojects as special files to "git diff" machinery Fix some "git ls-files -o" fallout from gitlinks Teach "git-read-tree -u" to check out submodules as a directory Teach git list-objects logic to not follow gitlinks Fix gitlink index entry filesystem matching Teach "git-read-tree -u" to check out submodules as a directory Teach git list-objects logic not to follow gitlinks Don't show gitlink directories when we want "other" files Teach git-update-index about gitlinks Teach directory traversal about subprojects Fix thinko in subproject entry sorting Teach core object handling functions about gitlinks Teach "fsck" not to follow subproject links Add "S_IFDIRLNK" file mode infrastructure for git links Add 'resolve_gitlink_ref()' helper function Avoid overflowing name buffer in deep directory structures diff-lib: use ce_mode_from_stat() rather than messing with modes manually