Andrew's git - gitweb.git/blob

   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
   9static const char diff_files_usage[] =
  10"git-diff-files [-q] [-0/-1/2/3] [<common diff options>] [<path>...]"
  11COMMON_DIFF_OPTIONS_HELP;
  12
  13static struct diff_options diff_options;
  14static int silent = 0;
  15static int diff_unmerged_stage = -1;
  16
  17static void show_unmerge(const char *path)
  18{
  19        diff_unmerge(&diff_options, path);
  20}
  21
  22static void show_file(int pfx, struct cache_entry *ce)
  23{
  24        diff_addremove(&diff_options, pfx, ntohl(ce->ce_mode),
  25                       ce->sha1, ce->name, NULL);
  26}
  27
  28static void show_modified(int oldmode, int mode,
  29                          const unsigned char *old_sha1, const unsigned char *sha1,
  30                          char *path)
  31{
  32        diff_change(&diff_options, oldmode, mode, old_sha1, sha1, path, NULL);
  33}
  34
  35int main(int argc, const char **argv)
  36{
  37        const char **pathspec;
  38        const char *prefix = setup_git_directory();
  39        int entries, i;
  40
  41        git_config(git_diff_config);
  42        diff_setup(&diff_options);
  43        while (1 < argc && argv[1][0] == '-') {
  44                if (!strcmp(argv[1], "--")) {
  45                        argv++;
  46                        argc--;
  47                        break;
  48                }
  49                if (!strcmp(argv[1], "-0"))
  50                        diff_unmerged_stage = 0;
  51                else if (!strcmp(argv[1], "-1"))
  52                        diff_unmerged_stage = 1;
  53                else if (!strcmp(argv[1], "-2"))
  54                        diff_unmerged_stage = 2;
  55                else if (!strcmp(argv[1], "-3"))
  56                        diff_unmerged_stage = 3;
  57                else if (!strcmp(argv[1], "--base"))
  58                        diff_unmerged_stage = 1;
  59                else if (!strcmp(argv[1], "--ours"))
  60                        diff_unmerged_stage = 2;
  61                else if (!strcmp(argv[1], "--theirs"))
  62                        diff_unmerged_stage = 3;
  63                else if (!strcmp(argv[1], "-q"))
  64                        silent = 1;
  65                else if (!strcmp(argv[1], "-r"))
  66                        ; /* no-op */
  67                else if (!strcmp(argv[1], "-s"))
  68                        ; /* no-op */
  69                else {
  70                        int diff_opt_cnt;
  71                        diff_opt_cnt = diff_opt_parse(&diff_options,
  72                                                      argv+1, argc-1);
  73                        if (diff_opt_cnt < 0)
  74                                usage(diff_files_usage);
  75                        else if (diff_opt_cnt) {
  76                                argv += diff_opt_cnt;
  77                                argc -= diff_opt_cnt;
  78                                continue;
  79                        }
  80                        else
  81                                usage(diff_files_usage);
  82                }
  83                argv++; argc--;
  84        }
  85
  86        /* Find the directory, and set up the pathspec */
  87        pathspec = get_pathspec(prefix, argv + 1);
  88        entries = read_cache();
  89
  90        if (diff_unmerged_stage < 0) {
  91                /* default to "ours" if unmerged index, otherwise 0 */
  92                for (i = 0; i < entries; i++) {
  93                        struct cache_entry *ce = active_cache[i];
  94                        if (ce_stage(ce)) {
  95                                diff_unmerged_stage = 2;
  96                                break;
  97                        }
  98                }
  99                if (diff_unmerged_stage < 0)
 100                        diff_unmerged_stage = 0;
 101        }
 102
 103
 104        if (diff_setup_done(&diff_options) < 0)
 105                usage(diff_files_usage);
 106
 107        /* At this point, if argc == 1, then we are doing everything.
 108         * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
 109         */
 110        if (entries < 0) {
 111                perror("read_cache");
 112                exit(1);
 113        }
 114
 115        for (i = 0; i < entries; i++) {
 116                struct stat st;
 117                unsigned int oldmode, newmode;
 118                struct cache_entry *ce = active_cache[i];
 119                int changed;
 120
 121                if (!ce_path_match(ce, pathspec))
 122                        continue;
 123
 124                if (ce_stage(ce)) {
 125                        if (!diff_unmerged_stage)
 126                                show_unmerge(ce->name);
 127                        while (i < entries) {
 128                                struct cache_entry *nce = active_cache[i];
 129
 130                                if (strcmp(ce->name, nce->name))
 131                                        break;
 132                                /* diff against the proper unmerged stage */
 133                                if (ce_stage(nce) == diff_unmerged_stage)
 134                                        ce = nce;
 135                                i++;
 136                        }
 137                        /*
 138                         * Compensate for loop update
 139                         */
 140                        i--;
 141                        /*
 142                         * Show the diff for the 'ce' if we found the one
 143                         * from the desired stage.
 144                         */
 145                        if (ce_stage(ce) != diff_unmerged_stage)
 146                                continue;
 147                }
 148                else if (diff_unmerged_stage)
 149                        continue;
 150
 151                if (lstat(ce->name, &st) < 0) {
 152                        if (errno != ENOENT && errno != ENOTDIR) {
 153                                perror(ce->name);
 154                                continue;
 155                        }
 156                        if (silent)
 157                                continue;
 158                        show_file('-', ce);
 159                        continue;
 160                }
 161                changed = ce_match_stat(ce, &st);
 162                if (!changed && !diff_options.find_copies_harder)
 163                        continue;
 164                oldmode = ntohl(ce->ce_mode);
 165
 166                newmode = DIFF_FILE_CANON_MODE(st.st_mode);
 167                if (!trust_executable_bit &&
 168                    S_ISREG(newmode) && S_ISREG(oldmode) &&
 169                    ((newmode ^ oldmode) == 0111))
 170                        newmode = oldmode;
 171                show_modified(oldmode, newmode,
 172                              ce->sha1, (changed ? null_sha1 : ce->sha1),
 173                              ce->name);
 174        }
 175        diffcore_std(&diff_options);
 176        diff_flush(&diff_options);
 177        return 0;
 178}