Andrew's git - gitweb.git/blob - builtin-diff-files.c

   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7#include "diff.h"
   8#include "commit.h"
   9#include "revision.h"
  10#include "builtin.h"
  11
  12static const char diff_files_usage[] =
  13"git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
  14COMMON_DIFF_OPTIONS_HELP;
  15
  16int cmd_diff_files(int argc, const char **argv, char **envp)
  17{
  18        struct rev_info rev;
  19        int silent = 0;
  20
  21        git_config(git_default_config); /* no "diff" UI options */
  22        init_revisions(&rev);
  23        rev.abbrev = 0;
  24
  25        argc = setup_revisions(argc, argv, &rev, NULL);
  26        while (1 < argc && argv[1][0] == '-') {
  27                if (!strcmp(argv[1], "--base"))
  28                        rev.max_count = 1;
  29                else if (!strcmp(argv[1], "--ours"))
  30                        rev.max_count = 2;
  31                else if (!strcmp(argv[1], "--theirs"))
  32                        rev.max_count = 3;
  33                else if (!strcmp(argv[1], "-q"))
  34                        silent = 1;
  35                else
  36                        usage(diff_files_usage);
  37                argv++; argc--;
  38        }
  39        if (!rev.diffopt.output_format)
  40                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  41
  42        /*
  43         * Make sure there are NO revision (i.e. pending object) parameter,
  44         * rev.max_count is reasonable (0 <= n <= 3),
  45         * there is no other revision filtering parameters.
  46         */
  47        if (rev.pending.nr ||
  48            rev.min_age != -1 || rev.max_age != -1)
  49                usage(diff_files_usage);
  50        /*
  51         * Backward compatibility wart - "diff-files -s" used to
  52         * defeat the common diff option "-s" which asked for
  53         * DIFF_FORMAT_NO_OUTPUT.
  54         */
  55        if (rev.diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
  56                rev.diffopt.output_format = DIFF_FORMAT_RAW;
  57        return run_diff_files(&rev, silent);
  58}