Merge branch 'ps/ref-storage-migration'

A new command has been added to migrate a repository that uses the
files backend for its ref storage to use the reftable backend, with
limitations.

* ps/ref-storage-migration:
  builtin/refs: new command to migrate ref storage formats
  refs: implement logic to migrate between ref storage formats
  refs: implement removal of ref storages
  worktree: don't store main worktree twice
  reftable: inline `merged_table_release()`
  refs/files: fix NULL pointer deref when releasing ref store
  refs/files: extract function to iterate through root refs
  refs/files: refactor `add_pseudoref_and_head_entries()`
  refs: allow to skip creation of reflog entries
  refs: pass storage format to `ref_store_init()` explicitly
  refs: convert ref storage format to an enum
  setup: unset ref storage when reinitializing repository version

1 files changed, 2 insertions, 6 deletions

diff --git a/reftable/stack.c b/reftable/stack.c
index 98ac9cf9f9..324cb27ce9 100644
--- a/reftable/stack.c
+++ b/reftable/stack.c
@@ -278,10 +278,8 @@ static int reftable_stack_reload_once(struct reftable_stack *st, char **names,
 
 	new_tables = NULL;
 	st->readers_len = new_readers_len;
-	if (st->merged) {
-		merged_table_release(st->merged);
+	if (st->merged)
 		reftable_merged_table_free(st->merged);
-	}
 	if (st->readers) {
 		reftable_free(st->readers);
 	}
@@ -987,10 +985,8 @@ static int stack_write_compact(struct reftable_stack *st,
 
 done:
 	reftable_iterator_destroy(&it);
-	if (mt) {
-		merged_table_release(mt);
+	if (mt)
 		reftable_merged_table_free(mt);
-	}
 	reftable_ref_record_release(&ref);
 	reftable_log_record_release(&log);
 	st->stats.entries_written += entries;