user/sven/git.git/diff.c, branch v1.7.7.4

Merge branch 'jc/maint-diffstat-numstat-context' into maint

2011-11-01T23:10:56Z

* jc/maint-diffstat-numstat-context: diff: teach --stat/--numstat to honor -U$num

Merge branch 'rs/diff-cleanup-records-fix' into maint

2011-10-21T17:49:25Z

* rs/diff-cleanup-records-fix: diff: resurrect XDF_NEED_MINIMAL with --minimal Revert removal of multi-match discard heuristic in 27af01

diff: resurrect XDF_NEED_MINIMAL with --minimal

2011-10-03T18:58:18Z

Earlier, 582aa00 (git diff too slow for a file, 2010-05-02) unconditionally dropped XDF_NEED_MINIMAL option from the internal xdiff invocation to help performance on pathological cases, while hinting that a follow-up patch could reintroduce it with "--minimal" option from the command line. Make it so. Signed-off-by: Junio C Hamano

diff: teach --stat/--numstat to honor -U$num

2011-09-22T17:54:47Z

"git diff -p" piped to external diffstat and "git diff --stat" may see different patch text (both are valid and describe the same change correctly) when counting the number of added and deleted lines, arriving at different results to confuse the users, as --stat/--numstat codepath always uses the hardcoded -U0 as the context length. Make --stat/--numstat codepath to honor the context length the same way as the textual patch codepath does to avoid this problem. Signed-off-by: Junio C Hamano

Merge branch 'jk/color-and-pager'

2011-08-29T04:19:16Z

* jk/color-and-pager: want_color: automatically fallback to color.ui diff: don't load color config in plumbing config: refactor get_colorbool function color: delay auto-color decision until point of use git_config_colorbool: refactor stdout_is_tty handling diff: refactor COLOR_DIFF from a flag into an int setup_pager: set GIT_PAGER_IN_USE t7006: use test_config helpers test-lib: add helper functions for config t7006: modernize calls to unset Conflicts: builtin/commit.c parse-options.c

diff: don't load color config in plumbing

2011-08-19T22:51:38Z

The diff config callback is split into two functions: one which loads "ui" config, and one which loads "basic" config. The former chains to the latter, as the diff UI config is a superset of the plumbing config. The color.diff variable is only loaded in the UI config. However, the basic config actually chains to git_color_default_config, which loads color.ui. This doesn't actually cause any bugs, because the plumbing diff code does not actually look at the value of color.ui. However, it is somewhat nonsensical, and it makes it difficult to refactor the color code. It probably came about because there is no git_color_config to load only color config, but rather just git_color_default_config, which loads color config and chains to git_default_config. This patch splits out the color-specific portion of git_color_default_config so that the diff UI config can call it directly. This is perhaps better explained by the chaining of callbacks. Before we had: git_diff_ui_config -> git_diff_basic_config -> git_color_default_config -> git_default_config Now we have: git_diff_ui_config -> git_color_config -> git_diff_basic_config -> git_default_config Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

color: delay auto-color decision until point of use

2011-08-19T22:51:34Z

When we read a color value either from a config file or from the command line, we use git_config_colorbool to convert it from the tristate always/never/auto into a single yes/no boolean value. This has some timing implications with respect to starting a pager. If we start (or decide not to start) the pager before checking the colorbool, everything is fine. Either isatty(1) will give us the right information, or we will properly check for pager_in_use(). However, if we decide to start a pager after we have checked the colorbool, things are not so simple. If stdout is a tty, then we will have already decided to use color. However, the user may also have configured color.pager not to use color with the pager. In this case, we need to actually turn off color. Unfortunately, the pager code has no idea which color variables were turned on (and there are many of them throughout the code, and they may even have been manipulated after the colorbool selection by something like "--color" on the command line). This bug can be seen any time a pager is started after config and command line options are checked. This has affected "git diff" since 89d07f7 (diff: don't run pager if user asked for a diff style exit code, 2007-08-12). It has also affect the log family since 1fda91b (Fix 'git log' early pager startup error case, 2010-08-24). This patch splits the notion of parsing a colorbool and actually checking the configuration. The "use_color" variables now have an additional possible value, GIT_COLOR_AUTO. Users of the variable should use the new "want_color()" wrapper, which will lazily determine and cache the auto-color decision. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

git_config_colorbool: refactor stdout_is_tty handling

2011-08-18T21:48:29Z

Usually this function figures out for itself whether stdout is a tty. However, it has an extra parameter just to allow git-config to override the auto-detection for its --get-colorbool option. Instead of an extra parameter, let's just use a global variable. This makes calling easier in the common case, and will make refactoring the colorbool code much simpler. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

diff: refactor COLOR_DIFF from a flag into an int

2011-08-18T21:35:53Z

This lets us store more than just a bit flag for whether we want color; we can also store whether we want automatic colors. This can be useful for making the automatic-color decision closer to the point of use. This mostly just involves replacing DIFF_OPT_* calls with manipulations of the flag. The biggest exception is that calls to DIFF_OPT_TST must check for "o->use_color > 0", which lets an "unknown" value (i.e., the default) stay at "no color". In the previous code, a value of "-1" was not propagated at all. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

Merge branch 'rc/histogram-diff'

2011-08-18T00:36:06Z

* rc/histogram-diff: xdiff/xhistogram: drop need for additional variable xdiff/xhistogram: rely on xdl_trim_ends() xdiff/xhistogram: rework handling of recursed results xdiff: do away with xdl_mmfile_next() Make test number unique xdiff/xprepare: use a smaller sample size for histogram diff xdiff/xprepare: skip classification teach --histogram to diff t4033-diff-patience: factor out tests xdiff/xpatience: factor out fall-back-diff function xdiff/xprepare: refactor abort cleanups xdiff/xprepare: use memset()