[PATCH 1/2] rebase: consolidate clean-up code before leaving reset_head()

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

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>
---
 builtin/rebase.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index 0ee06aa363..6f6d7de156 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -569,16 +569,13 @@ static int reset_head(struct object_id *oid, const char *action,
 	}
 
 	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);
@@ -586,10 +583,9 @@ static int reset_head(struct object_id *oid, const char *action,
 
 	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 +618,10 @@ 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;
 }
 
-- 
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