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