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 int diff_output_format = DIFF_FORMAT_HUMAN;
  15static int detect_rename = 0;
  16static int find_copies_harder = 0;
  17static int diff_setup_opt = 0;
  18static int diff_score_opt = 0;
  19static const char *pickaxe = NULL;
  20static int pickaxe_opts = 0;
  21static int diff_break_opt = -1;
  22static const char *orderfile = NULL;
  23static const char *diff_filter = NULL;
  24static int silent = 0;
  25
  26static void show_unmerge(const char *path)
  27{
  28        diff_unmerge(path);
  29}
  30
  31static void show_file(int pfx, struct cache_entry *ce)
  32{
  33        diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
  34}
  35
  36static void show_modified(int oldmode, int mode,
  37                          const unsigned char *old_sha1, const unsigned char *sha1,
  38                          char *path)
  39{
  40        diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
  41}
  42
  43int main(int argc, const char **argv)
  44{
  45        static const unsigned char null_sha1[20] = { 0, };
  46        int entries = read_cache();
  47        int i;
  48
  49        while (1 < argc && argv[1][0] == '-') {
  50                if (!strcmp(argv[1], "-p") || !strcmp(argv[1], "-u"))
  51                        diff_output_format = DIFF_FORMAT_PATCH;
  52                else if (!strcmp(argv[1], "-q"))
  53                        silent = 1;
  54                else if (!strcmp(argv[1], "-r"))
  55                        ; /* no-op */
  56                else if (!strcmp(argv[1], "-s"))
  57                        ; /* no-op */
  58                else if (!strcmp(argv[1], "-z"))
  59                        diff_output_format = DIFF_FORMAT_MACHINE;
  60                else if (!strcmp(argv[1], "--name-only"))
  61                        diff_output_format = DIFF_FORMAT_NAME;
  62                else if (!strcmp(argv[1], "--name-only-z"))
  63                        diff_output_format = DIFF_FORMAT_NAME_Z;
  64                else if (!strcmp(argv[1], "-R"))
  65                        diff_setup_opt |= DIFF_SETUP_REVERSE;
  66                else if (!strncmp(argv[1], "-S", 2))
  67                        pickaxe = argv[1] + 2;
  68                else if (!strncmp(argv[1], "-O", 2))
  69                        orderfile = argv[1] + 2;
  70                else if (!strncmp(argv[1], "--diff-filter=", 14))
  71                        diff_filter = argv[1] + 14;
  72                else if (!strcmp(argv[1], "--pickaxe-all"))
  73                        pickaxe_opts = DIFF_PICKAXE_ALL;
  74                else if (!strncmp(argv[1], "-B", 2)) {
  75                        if ((diff_break_opt =
  76                             diff_scoreopt_parse(argv[1])) == -1)
  77                                usage(diff_files_usage);
  78                }
  79                else if (!strncmp(argv[1], "-M", 2)) {
  80                        if ((diff_score_opt =
  81                             diff_scoreopt_parse(argv[1])) == -1)
  82                                usage(diff_files_usage);
  83                        detect_rename = DIFF_DETECT_RENAME;
  84                }
  85                else if (!strncmp(argv[1], "-C", 2)) {
  86                        if ((diff_score_opt =
  87                             diff_scoreopt_parse(argv[1])) == -1)
  88                                usage(diff_files_usage);
  89                        detect_rename = DIFF_DETECT_COPY;
  90                }
  91                else if (!strcmp(argv[1], "--find-copies-harder"))
  92                        find_copies_harder = 1;
  93                else
  94                        usage(diff_files_usage);
  95                argv++; argc--;
  96        }
  97
  98        if (find_copies_harder && detect_rename != DIFF_DETECT_COPY)
  99                usage(diff_files_usage);
 100
 101        /* At this point, if argc == 1, then we are doing everything.
 102         * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
 103         */
 104        if (entries < 0) {
 105                perror("read_cache");
 106                exit(1);
 107        }
 108
 109        diff_setup(diff_setup_opt);
 110
 111        for (i = 0; i < entries; i++) {
 112                struct stat st;
 113                unsigned int oldmode;
 114                struct cache_entry *ce = active_cache[i];
 115                int changed;
 116
 117                if (ce_stage(ce)) {
 118                        show_unmerge(ce->name);
 119                        while (i < entries &&
 120                               !strcmp(ce->name, active_cache[i]->name))
 121                                i++;
 122                        i--; /* compensate for loop control increments */
 123                        continue;
 124                }
 125
 126                if (lstat(ce->name, &st) < 0) {
 127                        if (errno != ENOENT && errno != ENOTDIR) {
 128                                perror(ce->name);
 129                                continue;
 130                        }
 131                        if (silent)
 132                                continue;
 133                        show_file('-', ce);
 134                        continue;
 135                }
 136                changed = ce_match_stat(ce, &st);
 137                if (!changed && !find_copies_harder)
 138                        continue;
 139                oldmode = ntohl(ce->ce_mode);
 140                show_modified(oldmode, DIFF_FILE_CANON_MODE(st.st_mode),
 141                              ce->sha1, (changed ? null_sha1 : ce->sha1),
 142                              ce->name);
 143        }
 144        diffcore_std((1 < argc) ? argv + 1 : NULL,
 145                     detect_rename, diff_score_opt,
 146                     pickaxe, pickaxe_opts,
 147                     diff_break_opt,
 148                     orderfile, diff_filter);
 149        diff_flush(diff_output_format);
 150        return 0;
 151}