Builtin git-init-db
[git] / diff-files.c
1 /*
2  * GIT - The information manager from hell
3  *
4  * Copyright (C) Linus Torvalds, 2005
5  */
6 #include "cache.h"
7 #include "diff.h"
8 #include "commit.h"
9 #include "revision.h"
10
11 static const char diff_files_usage[] =
12 "git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
13 COMMON_DIFF_OPTIONS_HELP;
14
15 int main(int argc, const char **argv)
16 {
17         struct rev_info rev;
18         int silent = 0;
19
20         git_config(git_diff_config);
21         init_revisions(&rev);
22         rev.abbrev = 0;
23
24         argc = setup_revisions(argc, argv, &rev, NULL);
25         while (1 < argc && argv[1][0] == '-') {
26                 if (!strcmp(argv[1], "--base"))
27                         rev.max_count = 1;
28                 else if (!strcmp(argv[1], "--ours"))
29                         rev.max_count = 2;
30                 else if (!strcmp(argv[1], "--theirs"))
31                         rev.max_count = 3;
32                 else if (!strcmp(argv[1], "-q"))
33                         silent = 1;
34                 else
35                         usage(diff_files_usage);
36                 argv++; argc--;
37         }
38         /*
39          * Make sure there are NO revision (i.e. pending object) parameter,
40          * rev.max_count is reasonable (0 <= n <= 3),
41          * there is no other revision filtering parameters.
42          */
43         if (rev.pending_objects ||
44             rev.min_age != -1 || rev.max_age != -1)
45                 usage(diff_files_usage);
46         /*
47          * Backward compatibility wart - "diff-files -s" used to
48          * defeat the common diff option "-s" which asked for
49          * DIFF_FORMAT_NO_OUTPUT.
50          */
51         if (rev.diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
52                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
53         return run_diff_files(&rev, silent);
54 }