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git/builtin/diff-index.c
Alexander Rinass 90a78b83e0 diff: run arguments through precompose_argv
When running diff commands, a pathspec containing decomposed
unicode code points is not converted to precomposed unicode form
under Mac OS X, but we normalize the paths in the index and the
history to precomposed form on that platform.  As a result, the
pathspec would not match and no diff is shown.

Unlike many builtin commands, the "diff" family of commands do
not use parse_options(), which is how other builtin commands
indirectly call precompose_argv() to normalize argv[] into
precomposed form on Mac OSX.  Teach these commands to call
precompose_argv() themselves.

Note that precomopose_argv() normalizes not just paths but all
command line arguments, so things like "git diff -G $string"
when $string has the decomposed form would first be normalized
into the precomposed form and would stop hitting the same string
in the decomposed form in the diff output with this change.

It is not a problem per-se, as "log" family of commands already use
parse_options() and call precompose_argv()--we can think of this
change as making the "diff" family of commands behave in a similar
way as the commands in the "log" family.

Signed-off-by: Alexander Rinass <alex@fournova.com>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-13 14:35:49 -07:00

57 lines
1.4 KiB
C

#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "builtin.h"
#include "submodule.h"
static const char diff_cache_usage[] =
"git diff-index [-m] [--cached] "
"[<common-diff-options>] <tree-ish> [<path>...]"
COMMON_DIFF_OPTIONS_HELP;
int cmd_diff_index(int argc, const char **argv, const char *prefix)
{
struct rev_info rev;
int cached = 0;
int i;
int result;
init_revisions(&rev, prefix);
gitmodules_config();
git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
rev.abbrev = 0;
precompose_argv(argc, argv);
argc = setup_revisions(argc, argv, &rev, NULL);
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--cached"))
cached = 1;
else
usage(diff_cache_usage);
}
if (!rev.diffopt.output_format)
rev.diffopt.output_format = DIFF_FORMAT_RAW;
/*
* Make sure there is one revision (i.e. pending object),
* and there is no revision filtering parameters.
*/
if (rev.pending.nr != 1 ||
rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
usage(diff_cache_usage);
if (!cached) {
setup_work_tree();
if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
perror("read_cache_preload");
return -1;
}
} else if (read_cache() < 0) {
perror("read_cache");
return -1;
}
result = run_diff_index(&rev, cached);
return diff_result_code(&rev.diffopt, result);
}