2eb32bd9da8cfa4d7b1b99f9d22ffa5b3d6202e5
1#include "cache.h"
2#include "diff.h"
3#include "commit.h"
4#include "revision.h"
5#include "builtin.h"
6#include "submodule.h"
7
8static const char diff_cache_usage[] =
9"git diff-index [-m] [--cached] "
10"[<common diff options>] <tree-ish> [<path>...]"
11COMMON_DIFF_OPTIONS_HELP;
12
13int cmd_diff_index(int argc, const char **argv, const char *prefix)
14{
15 struct rev_info rev;
16 int cached = 0;
17 int i;
18 int result;
19
20 init_revisions(&rev, prefix);
21 gitmodules_config();
22 git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
23 rev.abbrev = 0;
24
25 argc = setup_revisions(argc, argv, &rev, NULL);
26 for (i = 1; i < argc; i++) {
27 const char *arg = argv[i];
28
29 if (!strcmp(arg, "--cached"))
30 cached = 1;
31 else
32 usage(diff_cache_usage);
33 }
34 if (!rev.diffopt.output_format)
35 rev.diffopt.output_format = DIFF_FORMAT_RAW;
36
37 /*
38 * Make sure there is one revision (i.e. pending object),
39 * and there is no revision filtering parameters.
40 */
41 if (rev.pending.nr != 1 ||
42 rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
43 usage(diff_cache_usage);
44 if (!cached)
45 setup_work_tree();
46 if (read_cache() < 0) {
47 perror("read_cache");
48 return -1;
49 }
50 result = run_diff_index(&rev, cached);
51 return diff_result_code(&rev.diffopt, result);
52}