commit-graph: lazy-load trees for commits

diff --git a/commit.h b/commit.h
index e57ae4b58380cce6192cc6489682838677f048ce..23a3f364edec6b609a39f15518cfda06af69e487 100644 (file)
--- a/commit.h
+++ b/commit.h
@@ -22,7 +22,13 @@ struct commit {
        unsigned int index;
        timestamp_t date;
        struct commit_list *parents;
-       struct tree *tree;
+
+       /*
+        * If the commit is loaded from the commit-graph file, then this
+        * member may be NULL. Only access it through get_commit_tree()
+        * or get_commit_tree_oid().
+        */
+       struct tree *maybe_tree;
        uint32_t graph_pos;
 };
 
@@ -102,6 +108,9 @@ void unuse_commit_buffer(const struct commit *, const void *buffer);
  */
 void free_commit_buffer(struct commit *);
 
+struct tree *get_commit_tree(const struct commit *);
+struct object_id *get_commit_tree_oid(const struct commit *);
+
 /*
  * Disassociate any cached object buffer from the commit, but do not free it.
  * The buffer (or NULL, if none) is returned.