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.nr != 1 ||
  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 }