Function write_commit_graph_file

commit-graph.c:2094–2278

}

static int write_commit_graph_file(struct write_commit_graph_context *ctx)
{
	uint32_t i;
	struct hashfile *f;
	struct tempfile *graph_layer; /* when ctx->split is non-zero */
	struct lock_file lk = LOCK_INIT;
	const unsigned hashsz = ctx->r->hash_algo->rawsz;
	struct strbuf progress_title = STRBUF_INIT;
	struct chunkfile *cf;
	unsigned char file_hash[GIT_MAX_RAWSZ];

	if (ctx->split) {
		struct strbuf tmp_file = STRBUF_INIT;

		strbuf_addf(&tmp_file,
			    "%s/info/commit-graphs/tmp_graph_XXXXXX",
			    ctx->odb_source->path);
		ctx->graph_name = strbuf_detach(&tmp_file, NULL);
	} else {
		ctx->graph_name = get_commit_graph_filename(ctx->odb_source);
	}

	if (safe_create_leading_directories(ctx->r, ctx->graph_name)) {
		error(_("unable to create leading directories of %s"),
			ctx->graph_name);
		return -1;
	}

	if (ctx->split) {
		char *lock_name = get_commit_graph_chain_filename(ctx->odb_source);

		hold_lock_file_for_update_mode(&lk, lock_name,
					       LOCK_DIE_ON_ERROR, 0444);
		free(lock_name);

		graph_layer = mks_tempfile_m(ctx->graph_name, 0444);
		if (!graph_layer) {
			error(_("unable to create temporary graph layer"));
			return -1;
		}

		if (adjust_shared_perm(ctx->r, get_tempfile_path(graph_layer))) {
			error(_("unable to adjust shared permissions for '%s'"),
			      get_tempfile_path(graph_layer));
			return -1;
		}

		f = hashfd(ctx->r->hash_algo,
			   get_tempfile_fd(graph_layer), get_tempfile_path(graph_layer));
	} else {
		hold_lock_file_for_update_mode(&lk, ctx->graph_name,
					       LOCK_DIE_ON_ERROR, 0444);
		f = hashfd(ctx->r->hash_algo,
			   get_lock_file_fd(&lk), get_lock_file_path(&lk));
	}

	cf = init_chunkfile(f);