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