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
   8static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [paths...]";
   9
  10static int recursive = 0;
  11static int line_termination = '\n';
  12static int silent = 0;
  13static int silent_on_nonexisting_files = 0;
  14
  15static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
  16{
  17        int i;
  18        int namelen = ce_namelen(ce);
  19        for (i = 0; i < cnt; i++) {
  20                int speclen = strlen(spec[i]);
  21                if (! strncmp(spec[i], ce->name, speclen) &&
  22                    speclen <= namelen &&
  23                    (ce->name[speclen] == 0 ||
  24                     ce->name[speclen] == '/'))
  25                        return 1;
  26        }
  27        return 0;
  28}
  29
  30static void show_file(const char *prefix, struct cache_entry *ce)
  31{
  32        printf("%s%o\t%s\t%s\t%s%c", prefix, ntohl(ce->ce_mode), "blob",
  33                sha1_to_hex(ce->sha1), ce->name, line_termination);
  34}
  35
  36int main(int argc, char **argv)
  37{
  38        static const char null_sha1_hex[] = "0000000000000000000000000000000000000000";
  39        int entries = read_cache();
  40        int i;
  41
  42        while (1 < argc && argv[1][0] == '-') {
  43                if (!strcmp(argv[1], "-s"))
  44                        silent_on_nonexisting_files = silent = 1;
  45                else if (!strcmp(argv[1], "-q"))
  46                        silent_on_nonexisting_files = 1;
  47                else if (!strcmp(argv[1], "-z"))
  48                        line_termination = 0;
  49                else if (!strcmp(argv[1], "-r"))
  50                        recursive = 1;          /* No-op */
  51                else
  52                        usage(show_diff_usage);
  53                argv++; argc--;
  54        }
  55
  56        /* At this point, if argc == 1, then we are doing everything.
  57         * Otherwise argv[1] .. argv[argc-1] have the explicit paths.
  58         */
  59        if (entries < 0) {
  60                perror("read_cache");
  61                exit(1);
  62        }
  63
  64        for (i = 0; i < entries; i++) {
  65                struct stat st;
  66                unsigned int oldmode, mode;
  67                struct cache_entry *ce = active_cache[i];
  68                int changed;
  69
  70                if (1 < argc &&
  71                    ! matches_pathspec(ce, argv+1, argc-1))
  72                        continue;
  73
  74                if (ce_stage(ce)) {
  75                        printf("U %s%c", ce->name, line_termination);
  76
  77                        while (i < entries &&
  78                               !strcmp(ce->name, active_cache[i]->name))
  79                                i++;
  80                        i--; /* compensate for loop control increments */
  81                        continue;
  82                }
  83 
  84                if (stat(ce->name, &st) < 0) {
  85                        if (errno != ENOENT) {
  86                                perror(ce->name);
  87                                continue;
  88                        }       
  89                        if (silent_on_nonexisting_files)
  90                                continue;
  91                        show_file("-", ce);
  92                        continue;
  93                }
  94                changed = cache_match_stat(ce, &st);
  95                if (!changed)
  96                        continue;
  97
  98                oldmode = ntohl(ce->ce_mode);
  99                mode = S_IFREG | ce_permissions(st.st_mode);
 100
 101                printf("*%o->%o\t%s\t%s->%s\t%s%c",
 102                        oldmode, mode, "blob",
 103                        sha1_to_hex(ce->sha1), null_sha1_hex,
 104                        ce->name, line_termination);
 105        }
 106        return 0;
 107}