Function write_graph_chunk_data

commit-graph.c:1219–1320

}

static int write_graph_chunk_data(struct hashfile *f,
				  void *data)
{
	struct write_commit_graph_context *ctx = data;
	struct commit **list = ctx->commits.items;
	struct commit **last = ctx->commits.items + ctx->commits.nr;
	uint32_t num_extra_edges = 0;

	while (list < last) {
		struct commit_list *parent;
		struct object_id *tree;
		int edge_value;
		uint32_t packedDate[2];
		display_progress(ctx->progress, ++ctx->progress_cnt);

		if (repo_parse_commit_no_graph(ctx->r, *list))
			die(_("unable to parse commit %s"),
				oid_to_hex(&(*list)->object.oid));
		tree = get_commit_tree_oid(*list);
		hashwrite(f, tree->hash, ctx->r->hash_algo->rawsz);

		parent = (*list)->parents;

		if (!parent)
			edge_value = GRAPH_PARENT_NONE;
		else {
			edge_value = oid_pos(&parent->item->object.oid,
					     ctx->commits.items,
					     ctx->commits.nr,
					     commit_to_oid);

			if (edge_value >= 0)
				edge_value += ctx->new_num_commits_in_base;
			else if (ctx->new_base_graph) {
				uint32_t pos;
				if (find_commit_pos_in_graph(parent->item,
							     ctx->new_base_graph,
							     &pos))
					edge_value = pos;
			}

			if (edge_value < 0)
				BUG("missing parent %s for commit %s",
				    oid_to_hex(&parent->item->object.oid),
				    oid_to_hex(&(*list)->object.oid));
		}

		hashwrite_be32(f, edge_value);

		if (parent)
			parent = parent->next;

		if (!parent)
			edge_value = GRAPH_PARENT_NONE;
		else if (parent->next)
			edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges;
		else {
			edge_value = oid_pos(&parent->item->object.oid,