commit-graph: lazy-load trees for commits

diff --git a/commit.c b/commit.c
index fbc092808cb3ddfecc82abc4873e941331a31888..711f674c18d00c8d62b117764e67c5d9c6731616 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -296,6 +296,22 @@ void free_commit_buffer(struct commit *commit)
        }
 }
 
+struct tree *get_commit_tree(const struct commit *commit)
+{
+       if (commit->maybe_tree || !commit->object.parsed)
+               return commit->maybe_tree;
+
+       if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH)
+               BUG("commit has NULL tree, but was not loaded from commit-graph");
+
+       return get_commit_tree_in_graph(commit);
+}
+
+struct object_id *get_commit_tree_oid(const struct commit *commit)
+{
+       return &get_commit_tree(commit)->object.oid;
+}
+
 const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep)
 {
        struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);