git-svn: add 'log' command, a facsimile of basic `svn log'
[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, char **envp)
13 {
14         struct rev_info rev;
15         int cached = 0;
16         int i;
17
18         git_config(git_diff_config);
19         init_revisions(&rev);
20         rev.abbrev = 0;
21
22         argc = setup_revisions(argc, argv, &rev, NULL);
23         for (i = 1; i < argc; i++) {
24                 const char *arg = argv[i];
25                         
26                 if (!strcmp(arg, "--cached"))
27                         cached = 1;
28                 else
29                         usage(diff_cache_usage);
30         }
31         /*
32          * Make sure there is one revision (i.e. pending object),
33          * and there is no revision filtering parameters.
34          */
35         if (!rev.pending_objects || rev.pending_objects->next ||
36             rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
37                 usage(diff_cache_usage);
38         return run_diff_index(&rev, cached);
39 }