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tag: v1.5.0-rc3
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/*
* 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 silent = 0;

init_revisions(&rev, prefix);
git_config(git_default_config); /* 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"))
silent = 1;
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),
* there is no other revision filtering parameters.
*/
if (rev.pending.nr ||
rev.min_age != -1 || rev.max_age != -1)
usage(diff_files_usage);
return run_diff_files(&rev, silent);
}
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