Fix broken create_branch() in builtin-branch.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-branch.c b/builtin-branch.c
index e161e00978d5b26d7c5f520600359e6650f2fb34..42b1ff129e7d5bbea47a4d1af955395014f200f9 100644 (file)
--- a/builtin-branch.c
+++ b/builtin-branch.c
@@ -410,7 +410,6 @@ static void set_branch_defaults(const char *name, const char *real_ref)
 }
 
 static void create_branch(const char *name, const char *start_name,
-                         unsigned char *start_sha1,
                          int force, int reflog, int track)
 {
        struct ref_lock *lock;
@@ -431,15 +430,22 @@ static void create_branch(const char *name, const char *start_name,
                forcing = 1;
        }
 
-       if (start_sha1) {
-               /* detached HEAD */
-               hashcpy(sha1, start_sha1);
+       real_ref = NULL;
+       if (get_sha1(start_name, sha1))
+               die("Not a valid object name: '%s'.", start_name);
+
+       switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
+       case 0:
+               /* Not branching from any existing branch */
                real_ref = NULL;
-       }
-       else if (dwim_ref(start_name, strlen(start_name), sha1, &real_ref) > 1)
+               break;
+       case 1:
+               /* Unique completion -- good */
+               break;
+       default:
                die("Ambiguous object name: '%s'.", start_name);
-       else if (real_ref == NULL)
-               die("Not a valid object name: '%s'.", start_name);
+               break;
+       }
 
        if ((commit = lookup_commit_reference(sha1)) == NULL)
                die("Not a valid branch point: '%s'.", start_name);
@@ -620,12 +626,9 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                rename_branch(head, argv[i], force_rename);
        else if (rename && (i == argc - 2))
                rename_branch(argv[i], argv[i + 1], force_rename);
-       else if (i == argc - 1)
-               create_branch(argv[i], head, head_sha1, force_create, reflog,
-                             track);
-       else if (i == argc - 2)
-               create_branch(argv[i], argv[i+1], NULL, force_create, reflog,
-                             track);
+       else if (i == argc - 1 || i == argc - 2)
+               create_branch(argv[i], (i == argc - 2) ? argv[i+1] : head,
+                             force_create, reflog, track);
        else
                usage(builtin_branch_usage);