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 [-p] [-q] [-r] [-z] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] [<path>...]";
  11
  12static int diff_output_format = DIFF_FORMAT_HUMAN;
  13static int detect_rename = 0;
  14static int find_copies_harder = 0;
  15static int diff_setup_opt = 0;
  16static int diff_score_opt = 0;
  17static const char *pickaxe = NULL;
  18static int pickaxe_opts = 0;
  19static int diff_break_opt = -1;
  20static const char *orderfile = NULL;
  21static const char *diff_filter = NULL;
  22static int silent = 0;
  23
  24static void show_unmerge(const char *path)
  25{
  26        diff_unmerge(path);
  27}
  28
  29static void show_file(int pfx, struct cache_entry *ce)
  30{
  31        diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
  32}
  33
  34static void show_modified(int oldmode, int mode,
  35                          const unsigned char *old_sha1, const unsigned char *sha1,
  36                          char *path)
  37{
  38        diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
  39}
  40
  41int main(int argc, const char **argv)
  42{
  43        static const unsigned char null_sha1[20] = { 0, };
  44        int entries = read_cache();
  45        int i;
  46
  47        while (1 < argc && argv[1][0] == '-') {
  48                if (!strcmp(argv[1], "-p") || !strcmp(argv[1], "-u"))
  49                        diff_output_format = DIFF_FORMAT_PATCH;
  50                else if (!strcmp(argv[1], "-q"))
  51                        silent = 1;
  52                else if (!strcmp(argv[1], "-r"))
  53                        ; /* no-op */
  54                else if (!strcmp(argv[1], "-s"))
  55                        ; /* no-op */
  56                else if (!strcmp(argv[1], "-z"))
  57                        diff_output_format = DIFF_FORMAT_MACHINE;
  58                else if (!strcmp(argv[1], "-R"))
  59                        diff_setup_opt |= DIFF_SETUP_REVERSE;
  60                else if (!strncmp(argv[1], "-S", 2))
  61                        pickaxe = argv[1] + 2;
  62                else if (!strncmp(argv[1], "-O", 2))
  63                        orderfile = argv[1] + 2;
  64                else if (!strncmp(argv[1], "--diff-filter=", 14))
  65                        diff_filter = argv[1] + 14;
  66                else if (!strcmp(argv[1], "--pickaxe-all"))
  67                        pickaxe_opts = DIFF_PICKAXE_ALL;
  68                else if (!strncmp(argv[1], "-B", 2)) {
  69                        if ((diff_break_opt =
  70                             diff_scoreopt_parse(argv[1])) == -1)
  71                                usage(diff_files_usage);
  72                }
  73                else if (!strncmp(argv[1], "-M", 2)) {
  74                        if ((diff_score_opt =
  75                             diff_scoreopt_parse(argv[1])) == -1)
  76                                usage(diff_files_usage);
  77                        detect_rename = DIFF_DETECT_RENAME;
  78                }
  79                else if (!strncmp(argv[1], "-C", 2)) {
  80                        if ((diff_score_opt =
  81                             diff_scoreopt_parse(argv[1])) == -1)
  82                                usage(diff_files_usage);
  83                        detect_rename = DIFF_DETECT_COPY;
  84                }
  85                else if (!strcmp(argv[1], "--find-copies-harder"))
  86                        find_copies_harder = 1;
  87                else
  88                        usage(diff_files_usage);
  89                argv++; argc--;
  90        }
  91
  92        if (find_copies_harder && detect_rename != DIFF_DETECT_COPY)
  93                usage(diff_files_usage);
  94
  95        /* At this point, if argc == 1, then we are doing everything.
  96         * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
  97         */
  98        if (entries < 0) {
  99                perror("read_cache");
 100                exit(1);
 101        }
 102
 103        diff_setup(diff_setup_opt);
 104
 105        for (i = 0; i < entries; i++) {
 106                struct stat st;
 107                unsigned int oldmode;
 108                struct cache_entry *ce = active_cache[i];
 109                int changed;
 110
 111                if (ce_stage(ce)) {
 112                        show_unmerge(ce->name);
 113                        while (i < entries &&
 114                               !strcmp(ce->name, active_cache[i]->name))
 115                                i++;
 116                        i--; /* compensate for loop control increments */
 117                        continue;
 118                }
 119
 120                if (lstat(ce->name, &st) < 0) {
 121                        if (errno != ENOENT && errno != ENOTDIR) {
 122                                perror(ce->name);
 123                                continue;
 124                        }
 125                        if (silent)
 126                                continue;
 127                        show_file('-', ce);
 128                        continue;
 129                }
 130                changed = ce_match_stat(ce, &st);
 131                if (!changed && !find_copies_harder)
 132                        continue;
 133                oldmode = ntohl(ce->ce_mode);
 134                show_modified(oldmode, DIFF_FILE_CANON_MODE(st.st_mode),
 135                              ce->sha1, (changed ? null_sha1 : ce->sha1),
 136                              ce->name);
 137        }
 138        diffcore_std((1 < argc) ? argv + 1 : NULL,
 139                     detect_rename, diff_score_opt,
 140                     pickaxe, pickaxe_opts,
 141                     diff_break_opt,
 142                     orderfile, diff_filter);
 143        diff_flush(diff_output_format);
 144        return 0;
 145}