git/builtin-diff-files.c
Junio C Hamano 903e09a3ec diff/diff-files: do not use --cc too aggressively
Textual diff output for unmerged paths was too eager to give condensed
combined diff.  Even though "diff -c" (and "diff-files -c -p") is a
request to view combined diff without condensing (otherwise the user would
have explicitly asked for --cc, not -c), we showed "--cc" output anyway.

0fe7c1d (built-in diff: assorted updates, 2006-04-29) claimed to be
careful about doing this, but its breakage was hidden because back then
"git diff" was still a shell script that did not use the codepath it
introduced fully.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-09-18 10:49:03 -07:00

69 lines
1.8 KiB
C

/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "builtin.h"
static const char diff_files_usage[] =
"git diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
COMMON_DIFF_OPTIONS_HELP;
int cmd_diff_files(int argc, const char **argv, const char *prefix)
{
struct rev_info rev;
int result;
unsigned options = 0;
init_revisions(&rev, prefix);
git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
rev.abbrev = 0;
argc = setup_revisions(argc, argv, &rev, NULL);
while (1 < argc && argv[1][0] == '-') {
if (!strcmp(argv[1], "--base"))
rev.max_count = 1;
else if (!strcmp(argv[1], "--ours"))
rev.max_count = 2;
else if (!strcmp(argv[1], "--theirs"))
rev.max_count = 3;
else if (!strcmp(argv[1], "-q"))
options |= DIFF_SILENT_ON_REMOVED;
else
usage(diff_files_usage);
argv++; argc--;
}
if (!rev.diffopt.output_format)
rev.diffopt.output_format = DIFF_FORMAT_RAW;
/*
* Make sure there are NO revision (i.e. pending object) parameter,
* rev.max_count is reasonable (0 <= n <= 3), and
* there is no other revision filtering parameters.
*/
if (rev.pending.nr ||
rev.min_age != -1 || rev.max_age != -1 ||
3 < rev.max_count)
usage(diff_files_usage);
/*
* "diff-files --base -p" should not combine merges because it
* was not asked to. "diff-files -c -p" should not densify
* (the user should ask with "diff-files --cc" explicitly).
*/
if (rev.max_count == -1 && !rev.combine_merges &&
(rev.diffopt.output_format & DIFF_FORMAT_PATCH))
rev.combine_merges = rev.dense_combined_merges = 1;
if (read_cache() < 0) {
perror("read_cache");
return -1;
}
result = run_diff_files(&rev, options);
return diff_result_code(&rev.diffopt, result);
}