Function mark_complete_and_common_ref

fetch-pack.c:791–865

* Mark recent commits available locally and reachable from a local ref as * COMPLETE. * * The cutoff time for recency is determined by this heuristic: it is the * earliest commit time of the objects in refs that are commits and that we know * the commit time of. */

 * the commit time of.
 */
static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
					 struct fetch_pack_args *args,
					 struct ref **refs)
{
	struct ref *ref;
	int old_save_commit_buffer = save_commit_buffer;
	timestamp_t cutoff = 0;

	if (args->refetch)
		return;

	save_commit_buffer = 0;

	trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
	for (ref = *refs; ref; ref = ref->next) {
		struct commit *commit;

		commit = lookup_commit_in_graph(the_repository, &ref->old_oid);
		if (!commit) {
			struct object *o;

			if (!odb_has_object(the_repository->objects, &ref->old_oid, 0))
				continue;
			o = parse_object(the_repository, &ref->old_oid);
			if (!o || o->type != OBJ_COMMIT)
				continue;

			commit = (struct commit *)o;
		}

		/*
		 * We already have it -- which may mean that we were
		 * in sync with the other side at some time after
		 * that (it is OK if we guess wrong here).
		 */
		if (!cutoff || cutoff < commit->date)
			cutoff = commit->date;
	}
	trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);

	/*
	 * This block marks all local refs as COMPLETE, and then recursively marks all
	 * parents of those refs as COMPLETE.
	 */
	trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL);
	if (!args->deepen) {
		struct refs_for_each_ref_options opts = {
			.flags = REFS_FOR_EACH_INCLUDE_BROKEN,
		};

		refs_for_each_ref_ext(get_main_ref_store(the_repository),
				      mark_complete_oid, NULL, &opts);
		for_each_cached_alternate(NULL, mark_alternate_complete);
		if (cutoff)
			mark_recent_complete_commits(args, cutoff);
	}
	trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL);