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] "
  11"[<common diff options>] [<path>...]"
  12COMMON_DIFF_OPTIONS_HELP;
  13
  14static struct diff_options diff_options;
  15static int silent = 0;
  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], "-q"))
  50                        silent = 1;
  51                else if (!strcmp(argv[1], "-r"))
  52                        ; /* no-op */
  53                else if (!strcmp(argv[1], "-s"))
  54                        ; /* no-op */
  55                else {
  56                        int diff_opt_cnt;
  57                        diff_opt_cnt = diff_opt_parse(&diff_options,
  58                                                      argv+1, argc-1);
  59                        if (diff_opt_cnt < 0)
  60                                usage(diff_files_usage);
  61                        else if (diff_opt_cnt) {
  62                                argv += diff_opt_cnt;
  63                                argc -= diff_opt_cnt;
  64                                continue;
  65                        }
  66                        else
  67                                usage(diff_files_usage);
  68                }
  69                argv++; argc--;
  70        }
  71
  72        /* Find the directory, and set up the pathspec */
  73        pathspec = get_pathspec(prefix, argv + 1);
  74        entries = read_cache();
  75
  76        if (diff_setup_done(&diff_options) < 0)
  77                usage(diff_files_usage);
  78
  79        /* At this point, if argc == 1, then we are doing everything.
  80         * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
  81         */
  82        if (entries < 0) {
  83                perror("read_cache");
  84                exit(1);
  85        }
  86
  87        for (i = 0; i < entries; i++) {
  88                struct stat st;
  89                unsigned int oldmode, newmode;
  90                struct cache_entry *ce = active_cache[i];
  91                int changed;
  92
  93                if (!ce_path_match(ce, pathspec))
  94                        continue;
  95
  96                if (ce_stage(ce)) {
  97                        show_unmerge(ce->name);
  98                        while (i < entries &&
  99                               !strcmp(ce->name, active_cache[i]->name))
 100                                i++;
 101                        i--; /* compensate for loop control increments */
 102                        continue;
 103                }
 104
 105                if (lstat(ce->name, &st) < 0) {
 106                        if (errno != ENOENT && errno != ENOTDIR) {
 107                                perror(ce->name);
 108                                continue;
 109                        }
 110                        if (silent)
 111                                continue;
 112                        show_file('-', ce);
 113                        continue;
 114                }
 115                changed = ce_match_stat(ce, &st);
 116                if (!changed && !diff_options.find_copies_harder)
 117                        continue;
 118                oldmode = ntohl(ce->ce_mode);
 119
 120                newmode = DIFF_FILE_CANON_MODE(st.st_mode);
 121                if (!trust_executable_bit &&
 122                    S_ISREG(newmode) && S_ISREG(oldmode) &&
 123                    ((newmode ^ oldmode) == 0111))
 124                        newmode = oldmode;
 125                show_modified(oldmode, newmode,
 126                              ce->sha1, (changed ? null_sha1 : ce->sha1),
 127                              ce->name);
 128        }
 129        diffcore_std(&diff_options);
 130        diff_flush(&diff_options);
 131        return 0;
 132}