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
   9 static const char *diff_files_usage =
  10 "git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [-O<orderfile>] [paths...]";
  11
  12 static int diff_output_format = DIFF_FORMAT_HUMAN;
  13 static int detect_rename = 0;
  14 static int diff_setup_opt = 0;
  15 static int diff_score_opt = 0;
  16 static const char *pickaxe = NULL;
  17 static int pickaxe_opts = 0;
  18 static int diff_break_opt = -1;
  19 static const char *orderfile = NULL;
  20 static const char *diff_filter = NULL;
  21 static int silent = 0;
  22
  23 static void show_unmerge(const char *path)
  24 {
  25         diff_unmerge(path);
  26 }
  27
  28 static void show_file(int pfx, struct cache_entry *ce)
  29 {
  30         diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
  31 }
  32
  33 static void show_modified(int oldmode, int mode,
  34                           const unsigned char *old_sha1, const unsigned char *sha1,
  35                           char *path)
  36 {
  37         diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
  38 }
  39
  40 int main(int argc, const char **argv)
  41 {
  42         static const unsigned char null_sha1[20] = { 0, };
  43         int entries = read_cache();
  44         int i;
  45
  46         while (1 < argc && argv[1][0] == '-') {
  47                 if (!strcmp(argv[1], "-p"))
  48                         diff_output_format = DIFF_FORMAT_PATCH;
  49                 else 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 if (!strcmp(argv[1], "-z"))
  56                         diff_output_format = DIFF_FORMAT_MACHINE;
  57                 else if (!strcmp(argv[1], "-R"))
  58                         diff_setup_opt |= DIFF_SETUP_REVERSE;
  59                 else if (!strncmp(argv[1], "-S", 2))
  60                         pickaxe = argv[1] + 2;
  61                 else if (!strncmp(argv[1], "-O", 2))
  62                         orderfile = argv[1] + 2;
  63                 else if (!strncmp(argv[1], "--diff-filter=", 14))
  64                         diff_filter = argv[1] + 14;
  65                 else if (!strcmp(argv[1], "--pickaxe-all"))
  66                         pickaxe_opts = DIFF_PICKAXE_ALL;
  67                 else if (!strncmp(argv[1], "-B", 2)) {
  68                         if ((diff_break_opt =
  69                              diff_scoreopt_parse(argv[1])) == -1)
  70                                 usage(diff_files_usage);
  71                 }
  72                 else if (!strncmp(argv[1], "-M", 2)) {
  73                         if ((diff_score_opt =
  74                              diff_scoreopt_parse(argv[1])) == -1)
  75                                 usage(diff_files_usage);
  76                         detect_rename = DIFF_DETECT_RENAME;
  77                 }
  78                 else if (!strncmp(argv[1], "-C", 2)) {
  79                         if ((diff_score_opt =
  80                              diff_scoreopt_parse(argv[1])) == -1)
  81                                 usage(diff_files_usage);
  82                         detect_rename = DIFF_DETECT_COPY;
  83                 }
  84                 else
  85                         usage(diff_files_usage);
  86                 argv++; argc--;
  87         }
  88
  89         /* At this point, if argc == 1, then we are doing everything.
  90          * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
  91          */
  92         if (entries < 0) {
  93                 perror("read_cache");
  94                 exit(1);
  95         }
  96
  97         diff_setup(diff_setup_opt);
  98
  99         for (i = 0; i < entries; i++) {
 100                 struct stat st;
 101                 unsigned int oldmode;
 102                 struct cache_entry *ce = active_cache[i];
 103                 int changed;
 104
 105                 if (ce_stage(ce)) {
 106                         show_unmerge(ce->name);
 107                         while (i < entries &&
 108                                !strcmp(ce->name, active_cache[i]->name))
 109                                 i++;
 110                         i--; /* compensate for loop control increments */
 111                         continue;
 112                 }
 113
 114                 if (lstat(ce->name, &st) < 0) {
 115                         if (errno != ENOENT && errno != ENOTDIR) {
 116                                 perror(ce->name);
 117                                 continue;
 118                         }
 119                         if (silent)
 120                                 continue;
 121                         show_file('-', ce);
 122                         continue;
 123                 }
 124                 changed = ce_match_stat(ce, &st);
 125                 if (!changed && detect_rename < DIFF_DETECT_COPY)
 126                         continue;
 127
 128                 oldmode = ntohl(ce->ce_mode);
 129                 show_modified(oldmode, DIFF_FILE_CANON_MODE(st.st_mode),
 130                               ce->sha1, null_sha1,
 131                               ce->name);
 132         }
 133         diffcore_std((1 < argc) ? argv + 1 : NULL,
 134                      detect_rename, diff_score_opt,
 135                      pickaxe, pickaxe_opts,
 136                      diff_break_opt,
 137                      orderfile, diff_filter);
 138         diff_flush(diff_output_format);
 139         return 0;
 140 }