builtin-symbolic-ref.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "refs.h"
   4
   5 static const char git_symbolic_ref_usage[] =
   6 "git-symbolic-ref name [ref]";
   7
   8 static void check_symref(const char *HEAD)
   9 {
  10         unsigned char sha1[20];
  11         int flag;
  12         const char *refs_heads_master = resolve_ref(HEAD, sha1, 0, &flag);
  13
  14         if (!refs_heads_master)
  15                 die("No such ref: %s", HEAD);
  16         else if (!(flag & REF_ISSYMREF))
  17                 die("ref %s is not a symbolic ref", HEAD);
  18         puts(refs_heads_master);
  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(argv[1], argv[2]);
  30                 break;
  31         default:
  32                 usage(git_symbolic_ref_usage);
  33         }
  34         return 0;
  35 }