test/LoadDatabase: new test program (for benchmarking the database loader)

test/LoadDatabase.cxx

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright The Music Player Daemon Project
+
+#include "config.h"
+#include "db/plugins/simple/DatabaseSave.hxx"
+#include "db/plugins/simple/Directory.hxx"
+#include "fs/Path.hxx"
+#include "fs/NarrowPath.hxx"
+#include "fs/io/TextFile.hxx"
+#include "util/PrintException.hxx"
+
+int
+main(int argc, char **argv)
+try {
+	if (argc != 2) {
+		fprintf(stderr, "Usage: LoadDatabase PATH\n");
+		return EXIT_FAILURE;
+	}
+
+	const FromNarrowPath db_path = argv[1];
+
+	Directory root{{}, nullptr};
+	TextFile line_reader{db_path};
+	db_load_internal(line_reader, root);
+
+	return EXIT_SUCCESS;
+} catch (...) {
+	PrintException(std::current_exception());
+	return EXIT_FAILURE;
+}