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        precompose_argv(argc, argv);
  25
  26        argc = setup_revisions(argc, argv, &rev, NULL);
  27        for (i = 1; i < argc; i++) {
  28                const char *arg = argv[i];
  29
  30                if (!strcmp(arg, "--cached"))
  31                        cached = 1;
  32                else
  33                        usage(diff_cache_usage);
  34        }
  35        if (!rev.diffopt.output_format)
  36                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  37
  38        /*
  39         * Make sure there is one revision (i.e. pending object),
  40         * and there is no revision filtering parameters.
  41         */
  42        if (rev.pending.nr != 1 ||
  43            rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
  44                usage(diff_cache_usage);
  45        if (!cached) {
  46                setup_work_tree();
  47                if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
  48                        perror("read_cache_preload");
  49                        return -1;
  50                }
  51        } else if (read_cache() < 0) {
  52                perror("read_cache");
  53                return -1;
  54        }
  55        result = run_diff_index(&rev, cached);
  56        return diff_result_code(&rev.diffopt, result);
  57}