rebase: consolidate clean-up code before leaving reset_head()

The same clean-up code is repeated quite a few times; Let's DRY up the
code some.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/rebase.c b/builtin/rebase.c
index 0ee06aa3631ee89761d570b433994cc77302742e..e173654d5635457aa159c570b14982d42506b145 100644 (file)
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -541,13 +541,15 @@ static int reset_head(struct object_id *oid, const char *action,
        if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
                BUG("Not a fully qualified branch: '%s'", switch_to_branch);
 
-       if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0)
-               return -1;
+       if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0) {
+               ret = -1;
+               goto leave_reset_head;
+       }
 
        if (!oid) {
                if (get_oid("HEAD", &head_oid)) {
-                       rollback_lock_file(&lock);
-                       return error(_("could not determine HEAD revision"));
+                       ret = error(_("could not determine HEAD revision"));
+                       goto leave_reset_head;
                }
                oid = &head_oid;
        }
@@ -564,32 +566,27 @@ static int reset_head(struct object_id *oid, const char *action,
                unpack_tree_opts.reset = 1;
 
        if (read_index_unmerged(the_repository->index) < 0) {
-               rollback_lock_file(&lock);
-               return error(_("could not read index"));
+               ret = error(_("could not read index"));
+               goto leave_reset_head;
        }
 
        if (!fill_tree_descriptor(&desc, oid)) {
-               error(_("failed to find tree of %s"), oid_to_hex(oid));
-               rollback_lock_file(&lock);
-               free((void *)desc.buffer);
-               return -1;
+               ret = error(_("failed to find tree of %s"), oid_to_hex(oid));
+               goto leave_reset_head;
        }
 
        if (unpack_trees(1, &desc, &unpack_tree_opts)) {
-               rollback_lock_file(&lock);
-               free((void *)desc.buffer);
-               return -1;
+               ret = -1;
+               goto leave_reset_head;
        }
 
        tree = parse_tree_indirect(oid);
        prime_cache_tree(the_repository->index, tree);
 
-       if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0)
+       if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0) {
                ret = error(_("could not write index"));
-       free((void *)desc.buffer);
-
-       if (ret)
-               return ret;
+               goto leave_reset_head;
+       }
 
        reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
        strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
@@ -622,7 +619,10 @@ static int reset_head(struct object_id *oid, const char *action,
                                         UPDATE_REFS_MSG_ON_ERR);
        }
 
+leave_reset_head:
        strbuf_release(&msg);
+       rollback_lock_file(&lock);
+       free((void *)desc.buffer);
        return ret;
 }