Cleanup check_valid in commit-tree.
[git/git.git] / builtin-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 #include "builtin.h"
11
12 static const char diff_files_usage[] =
13 "git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
14 COMMON_DIFF_OPTIONS_HELP;
15
16 int cmd_diff_files(int argc, const char **argv, const char *prefix)
17 {
18 struct rev_info rev;
19 int silent = 0;
20
21 init_revisions(&rev, prefix);
22 git_config(git_default_config); /* no "diff" UI options */
23 rev.abbrev = 0;
24
25 argc = setup_revisions(argc, argv, &rev, NULL);
26 while (1 < argc && argv[1][0] == '-') {
27 if (!strcmp(argv[1], "--base"))
28 rev.max_count = 1;
29 else if (!strcmp(argv[1], "--ours"))
30 rev.max_count = 2;
31 else if (!strcmp(argv[1], "--theirs"))
32 rev.max_count = 3;
33 else if (!strcmp(argv[1], "-q"))
34 silent = 1;
35 else
36 usage(diff_files_usage);
37 argv++; argc--;
38 }
39 if (!rev.diffopt.output_format)
40 rev.diffopt.output_format = DIFF_FORMAT_RAW;
41
42 /*
43 * Make sure there are NO revision (i.e. pending object) parameter,
44 * rev.max_count is reasonable (0 <= n <= 3),
45 * there is no other revision filtering parameters.
46 */
47 if (rev.pending.nr ||
48 rev.min_age != -1 || rev.max_age != -1)
49 usage(diff_files_usage);
50 return run_diff_files(&rev, silent);
51 }