Andrew's git - gitweb.git/blob - 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#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_preload(&rev.diffopt.pathspec) < 0) {
  47                        perror("read_cache_preload");
  48                        return -1;
  49                }
  50        } else if (read_cache() < 0) {
  51                perror("read_cache");
  52                return -1;
  53        }
  54        result = run_diff_index(&rev, cached);
  55        return diff_result_code(&rev.diffopt, result);
  56}