refactor run_receive_hook()

diff --git a/branch.c b/branch.c
index d62cc0132cbff6de04b69864279d6c92f9e95e0a..478d82567d7773d62c686d73780659b86594eede 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -135,6 +135,26 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
        return 0;
 }
 
+int validate_new_branchname(const char *name, struct strbuf *ref, int force)
+{
+       const char *head;
+       unsigned char sha1[20];
+
+       if (strbuf_check_branch_ref(ref, name))
+               die("'%s' is not a valid branch name.", name);
+
+       if (!ref_exists(ref->buf))
+               return 0;
+       else if (!force)
+               die("A branch named '%s' already exists.", ref->buf + strlen("refs/heads/"));
+
+       head = resolve_ref("HEAD", sha1, 0, NULL);
+       if (!is_bare_repository() && head && !strcmp(head, ref->buf))
+               die("Cannot force update the current branch.");
+
+       return 1;
+}
+
 void create_branch(const char *head,
                   const char *name, const char *start_name,
                   int force, int reflog, enum branch_track track)
@@ -151,17 +171,11 @@ void create_branch(const char *head,
        if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
                explicit_tracking = 1;
 
-       if (strbuf_check_branch_ref(&ref, name))
-               die("'%s' is not a valid branch name.", name);
-
-       if (resolve_ref(ref.buf, sha1, 1, NULL)) {
-               if (!force && track == BRANCH_TRACK_OVERRIDE)
+       if (validate_new_branchname(name, &ref, force || track == BRANCH_TRACK_OVERRIDE)) {
+               if (!force)
                        dont_change_ref = 1;
-               else if (!force)
-                       die("A branch named '%s' already exists.", name);
-               else if (!is_bare_repository() && head && !strcmp(head, name))
-                       die("Cannot force update the current branch.");
-               forcing = 1;
+               else
+                       forcing = 1;
        }
 
        real_ref = NULL;