format-patch: refactor branch name calculation

By moving the part that relies on rev->pending earlier, where we are
already checking the special case where there's only one ref.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/log.c b/builtin/log.c
index 679282706add9afefa86c80f542685849784338e..804626b0eaf6f300cdf5e0c06c48ec329e2885a7 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1052,15 +1052,6 @@ static char *find_branch_name(struct rev_info *rev)
        if (0 <= positive) {
                ref = rev->cmdline.rev[positive].name;
                tip_sha1 = rev->cmdline.rev[positive].item->sha1;
-       } else if (!rev->cmdline.nr && rev->pending.nr == 1 &&
-                  !strcmp(rev->pending.objects[0].name, "HEAD")) {
-               /*
-                * No actual ref from command line, but "HEAD" from
-                * rev->def was added in setup_revisions()
-                * e.g. format-patch --cover-letter -12
-                */
-               ref = "HEAD";
-               tip_sha1 = rev->pending.objects[0].item->sha1;
        } else {
                return NULL;
        }
@@ -1280,28 +1271,36 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        }
 
        if (rev.pending.nr == 1) {
+               int check_head = 0;
+
                if (rev.max_count < 0 && !rev.show_root_diff) {
                        /*
                         * This is traditional behaviour of "git format-patch
                         * origin" that prepares what the origin side still
                         * does not have.
                         */
-                       unsigned char sha1[20];
-                       const char *ref;
-
                        rev.pending.objects[0].item->flags |= UNINTERESTING;
                        add_head_to_pending(&rev);
-                       ref = resolve_ref_unsafe("HEAD", sha1, 1, NULL);
-                       if (ref && !prefixcmp(ref, "refs/heads/"))
-                               branch_name = xstrdup(ref + strlen("refs/heads/"));
-                       else
-                               branch_name = xstrdup(""); /* no branch */
+                       check_head = 1;
                }
                /*
                 * Otherwise, it is "format-patch -22 HEAD", and/or
                 * "format-patch --root HEAD".  The user wants
                 * get_revision() to do the usual traversal.
                 */
+
+               if (!strcmp(rev.pending.objects[0].name, "HEAD"))
+                       check_head = 1;
+
+               if (check_head) {
+                       unsigned char sha1[20];
+                       const char *ref;
+                       ref = resolve_ref_unsafe("HEAD", sha1, 1, NULL);
+                       if (ref && !prefixcmp(ref, "refs/heads/"))
+                               branch_name = xstrdup(ref + strlen("refs/heads/"));
+                       else
+                               branch_name = xstrdup(""); /* no branch */
+               }
        }
 
        /*