symbolic-ref.c

   1 #include "cache.h"
   2
   3 static const char git_symbolic_ref_usage[] =
   4 "git-symbolic-ref name [ref]";
   5
   6 static void check_symref(const char *HEAD)
   7 {
   8         unsigned char sha1[20];
   9         const char *git_HEAD = strdup(git_path("%s", HEAD));
  10         const char *git_refs_heads_master = resolve_ref(git_HEAD, sha1, 0);
  11         if (git_refs_heads_master) {
  12                 /* we want to strip the .git/ part */
  13                 int pfxlen = strlen(git_HEAD) - strlen(HEAD);
  14                 puts(git_refs_heads_master + pfxlen);
  15         }
  16         else
  17                 die("No such ref: %s", HEAD);
  18 }
  19
  20 int main(int argc, const char **argv)
  21 {
  22         setup_git_directory();
  23         switch (argc) {
  24         case 2:
  25                 check_symref(argv[1]);
  26                 break;
  27         case 3:
  28                 create_symref(strdup(git_path("%s", argv[1])), argv[2]);
  29                 break;
  30         default:
  31                 usage(git_symbolic_ref_usage);
  32         }
  33         return 0;
  34 }