Re: [PATCH v4 2/2] commit-graph: don't write commit-graph when disabled

"Derrick Stolee via GitGitGadget" [off-list ref] writes:

+	if (!the_repository->settings.core_commit_graph) {
+		warning(_("attempting to write a commit-graph, but 'core.commitGraph' is disabled"));
+		return 0;
+	}

Makes sense.  We probably would want to short-circuit invocation of
commit-graph related tasks in the maintenance by checking the
feature, if we are not already doing so.

Thanks.