builtin-symbolic-ref.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3
   4 static const char git_symbolic_ref_usage[] =
   5 "git-symbolic-ref name [ref]";
   6
   7 static void check_symref(const char *HEAD)
   8 {
   9         unsigned char sha1[20];
  10         const char *git_HEAD = xstrdup(git_path("%s", HEAD));
  11         const char *git_refs_heads_master = resolve_ref(git_HEAD, sha1, 0);
  12         if (git_refs_heads_master) {
  13                 /* we want to strip the .git/ part */
  14                 int pfxlen = strlen(git_HEAD) - strlen(HEAD);
  15                 puts(git_refs_heads_master + pfxlen);
  16         }
  17         else
  18                 die("No such ref: %s", HEAD);
  19 }
  20
  21 int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
  22 {
  23         git_config(git_default_config);
  24         switch (argc) {
  25         case 2:
  26                 check_symref(argv[1]);
  27                 break;
  28         case 3:
  29                 create_symref(xstrdup(git_path("%s", argv[1])), argv[2]);
  30                 break;
  31         default:
  32                 usage(git_symbolic_ref_usage);
  33         }
  34         return 0;
  35 }