builtin-show-ref.c

   1 #include "cache.h"
   2 #include "refs.h"
   3 #include "object.h"
   4 #include "tag.h"
   5
   6 static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--deref] [-s|--hash] [--tags] [--heads] [--] [pattern*]";
   7
   8 static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
   9         found_match = 0, verify = 0, quiet = 0, hash_only = 0;
  10 static const char **pattern;
  11
  12 static int show_ref(const char *refname, const unsigned char *sha1)
  13 {
  14         struct object *obj;
  15
  16         if (tags_only || heads_only) {
  17                 int match;
  18
  19                 match = heads_only && !strncmp(refname, "refs/heads/", 11);
  20                 match |= tags_only && !strncmp(refname, "refs/tags/", 10);
  21                 if (!match)
  22                         return 0;
  23         }
  24         if (pattern) {
  25                 int reflen = strlen(refname);
  26                 const char **p = pattern, *m;
  27                 while ((m = *p++) != NULL) {
  28                         int len = strlen(m);
  29                         if (len > reflen)
  30                                 continue;
  31                         if (memcmp(m, refname + reflen - len, len))
  32                                 continue;
  33                         if (len == reflen)
  34                                 goto match;
  35                         /* "--verify" requires an exact match */
  36                         if (verify)
  37                                 continue;
  38                         if (refname[reflen - len - 1] == '/')
  39                                 goto match;
  40                 }
  41                 return 0;
  42         }
  43
  44 match:
  45         found_match++;
  46         obj = parse_object(sha1);
  47         if (!obj) {
  48                 if (quiet)
  49                         return 0;
  50                 die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1));
  51         }
  52         if (quiet)
  53                 return 0;
  54         if (hash_only)
  55                 printf("%s\n", sha1_to_hex(sha1));
  56         else
  57                 printf("%s %s\n", sha1_to_hex(sha1), refname);
  58         if (deref_tags && obj->type == OBJ_TAG) {
  59                 obj = deref_tag(obj, refname, 0);
  60                 printf("%s %s^{}\n", sha1_to_hex(obj->sha1), refname);
  61         }
  62         return 0;
  63 }
  64
  65 int cmd_show_ref(int argc, const char **argv, const char *prefix)
  66 {
  67         int i;
  68
  69         for (i = 1; i < argc; i++) {
  70                 const char *arg = argv[i];
  71                 if (*arg != '-') {
  72                         pattern = argv + i;
  73                         break;
  74                 }
  75                 if (!strcmp(arg, "--")) {
  76                         pattern = argv + i + 1;
  77                         if (!*pattern)
  78                                 pattern = NULL;
  79                         break;
  80                 }
  81                 if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
  82                         quiet = 1;
  83                         continue;
  84                 }
  85                 if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
  86                         show_head = 1;
  87                         continue;
  88                 }
  89                 if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
  90                         deref_tags = 1;
  91                         continue;
  92                 }
  93                 if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
  94                         hash_only = 1;
  95                         continue;
  96                 }
  97                 if (!strcmp(arg, "--verify")) {
  98                         verify = 1;
  99                         continue;
 100                 }
 101                 if (!strcmp(arg, "--tags")) {
 102                         tags_only = 1;
 103                         continue;
 104                 }
 105                 if (!strcmp(arg, "--heads")) {
 106                         heads_only = 1;
 107                         continue;
 108                 }
 109                 usage(show_ref_usage);
 110         }
 111         if (show_head)
 112                 head_ref(show_ref);
 113         for_each_ref(show_ref);
 114         if (!found_match) {
 115                 if (verify && !quiet)
 116                         die("No match");
 117                 return 1;
 118         }
 119         return 0;
 120 }