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