Function write_commit_graph

commit-graph.c:2554–2741

}

int write_commit_graph(struct odb_source *source,
		       const struct string_list *const pack_indexes,
		       struct oidset *commits,
		       enum commit_graph_write_flags flags,
		       const struct commit_graph_opts *opts)
{
	struct repository *r = source->odb->repo;
	struct write_commit_graph_context ctx = {
		.r = r,
		.odb_source = source,
		.append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0,
		.report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0,
		.split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0,
		.opts = opts,
		.total_bloom_filter_data_size = 0,
		.write_generation_data = (get_configured_generation_version(r) == 2),
		.num_generation_data_overflows = 0,
	};
	uint32_t i;
	int res = 0;
	int replace = 0;
	struct bloom_filter_settings bloom_settings = DEFAULT_BLOOM_FILTER_SETTINGS;
	struct topo_level_slab topo_levels;
	struct commit_graph *g;

	prepare_repo_settings(r);
	if (!r->settings.core_commit_graph) {
		warning(_("attempting to write a commit-graph, but 'core.commitGraph' is disabled"));
		return 0;
	}
	if (!commit_graph_compatible(r))
		return 0;
	if (r->settings.commit_graph_changed_paths_version < -1
	    || r->settings.commit_graph_changed_paths_version > 2) {
		warning(_("attempting to write a commit-graph, but "
			  "'commitGraph.changedPathsVersion' (%d) is not supported"),
			r->settings.commit_graph_changed_paths_version);
		return 0;
	}

	bloom_settings.hash_version = r->settings.commit_graph_changed_paths_version;
	bloom_settings.bits_per_entry = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_BITS_PER_ENTRY",
						      bloom_settings.bits_per_entry);
	bloom_settings.num_hashes = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_NUM_HASHES",
						  bloom_settings.num_hashes);
	bloom_settings.max_changed_paths = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_MAX_CHANGED_PATHS",
							 bloom_settings.max_changed_paths);
	ctx.bloom_settings = &bloom_settings;

	init_topo_level_slab(&topo_levels);
	ctx.topo_levels = &topo_levels;

	g = prepare_commit_graph(ctx.r);
	for (struct commit_graph *chain = g; chain; chain = chain->base_graph)
		g->topo_levels = &topo_levels;

	if (flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS)
		ctx.changed_paths = 1;