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