db: add compile-time option to disable database

Makefile.am

@@ -17,7 +17,6 @@ noinst_LIBRARIES = \
 	libtag.a \
 	libinput.a \
 	libfs.a \
-	libdb_plugins.a \
 	libplaylist_plugins.a \
 	libdecoder_plugins.a \
 	libfilter_plugins.a \
@@ -85,7 +84,6 @@ src_mpd_SOURCES = \
 	src/command/TagCommands.cxx src/command/TagCommands.hxx \
 	src/command/PlayerCommands.cxx src/command/PlayerCommands.hxx \
 	src/command/PlaylistCommands.cxx src/command/PlaylistCommands.hxx \
-	src/command/DatabaseCommands.cxx src/command/DatabaseCommands.hxx \
 	src/command/FileCommands.cxx src/command/FileCommands.hxx \
 	src/command/OutputCommands.cxx src/command/OutputCommands.hxx \
 	src/command/MessageCommands.cxx src/command/MessageCommands.hxx \
@@ -103,37 +101,10 @@ src_mpd_SOURCES = \
 	src/decoder/DecoderPlugin.hxx \
 	src/decoder/DecoderInternal.cxx src/decoder/DecoderInternal.hxx \
 	src/decoder/DecoderPrint.cxx src/decoder/DecoderPrint.hxx \
-	src/db/Uri.hxx \
-	src/db/Directory.cxx src/db/Directory.hxx \
-	src/db/DirectorySave.cxx src/db/DirectorySave.hxx \
-	src/db/DatabaseSimple.hxx \
-	src/db/DatabaseGlue.cxx src/db/DatabaseGlue.hxx \
-	src/db/DatabaseSong.cxx src/db/DatabaseSong.hxx \
-	src/db/DatabasePrint.cxx src/db/DatabasePrint.hxx \
-	src/db/DatabaseQueue.cxx src/db/DatabaseQueue.hxx \
-	src/db/DatabasePlaylist.cxx src/db/DatabasePlaylist.hxx \
-	src/db/DatabaseError.cxx src/db/DatabaseError.hxx \
-	src/db/DatabaseLock.cxx src/db/DatabaseLock.hxx \
-	src/db/DatabaseSave.cxx src/db/DatabaseSave.hxx \
-	src/db/DatabasePlugin.hxx \
-	src/db/DatabaseListener.hxx \
-	src/db/Visitor.hxx \
-	src/db/Selection.cxx src/db/Selection.hxx \
 	src/filter/FilterConfig.cxx src/filter/FilterConfig.hxx \
 	src/filter/FilterPlugin.cxx src/filter/FilterPlugin.hxx \
 	src/filter/FilterInternal.hxx \
 	src/filter/FilterRegistry.cxx src/filter/FilterRegistry.hxx \
-	src/db/update/UpdateDomain.cxx src/db/update/UpdateDomain.hxx \
-	src/db/update/Service.cxx src/db/update/Service.hxx \
-	src/db/update/UpdateGlue.cxx \
-	src/db/update/Queue.cxx src/db/update/Queue.hxx \
-	src/db/update/UpdateIO.cxx src/db/update/UpdateIO.hxx \
-	src/db/update/Editor.cxx src/db/update/Editor.hxx \
-	src/db/update/Walk.cxx src/db/update/Walk.hxx \
-	src/db/update/UpdateSong.cxx \
-	src/db/update/Container.cxx \
-	src/db/update/Remove.cxx src/db/update/Remove.hxx \
-	src/db/update/ExcludeList.cxx src/db/update/ExcludeList.hxx \
 	src/client/Client.cxx src/client/Client.hxx \
 	src/client/ClientInternal.hxx \
 	src/client/ClientEvent.cxx \
@@ -189,8 +160,6 @@ src_mpd_SOURCES = \
 	src/playlist/Print.cxx src/playlist/Print.hxx \
 	src/db/PlaylistVector.cxx src/db/PlaylistVector.hxx \
 	src/db/PlaylistInfo.hxx \
-	src/PlaylistDatabase.cxx src/PlaylistDatabase.hxx \
-	src/PlaylistUpdate.cxx \
 	src/queue/IdTable.hxx \
 	src/queue/Queue.cxx src/queue/Queue.hxx \
 	src/queue/QueuePrint.cxx src/queue/QueuePrint.hxx \
@@ -198,13 +167,9 @@ src_mpd_SOURCES = \
 	src/ReplayGainConfig.cxx src/ReplayGainConfig.hxx \
 	src/ReplayGainInfo.cxx src/ReplayGainInfo.hxx \
 	src/DetachedSong.cxx src/DetachedSong.hxx \
-	src/db/LightSong.cxx src/db/LightSong.hxx \
-	src/db/LightDirectory.hxx \
-	src/db/Song.cxx src/db/Song.hxx \
 	src/SongUpdate.cxx \
 	src/SongPrint.cxx src/SongPrint.hxx \
 	src/SongSave.cxx src/SongSave.hxx \
-	src/db/SongSort.cxx src/db/SongSort.hxx \
 	src/StateFile.cxx src/StateFile.hxx \
 	src/Stats.cxx src/Stats.hxx \
 	src/TagPrint.cxx src/TagPrint.hxx \
@@ -216,6 +181,44 @@ src_mpd_SOURCES = \
 	src/PlaylistFile.cxx src/PlaylistFile.hxx \
 	src/Timer.cxx
 
+if ENABLE_DATABASE
+src_mpd_SOURCES += \
+	src/PlaylistUpdate.cxx \
+	src/PlaylistDatabase.cxx src/PlaylistDatabase.hxx \
+	src/command/DatabaseCommands.cxx src/command/DatabaseCommands.hxx \
+	src/db/LightSong.cxx src/db/LightSong.hxx \
+	src/db/LightDirectory.hxx \
+	src/db/Song.cxx src/db/Song.hxx \
+	src/db/SongSort.cxx src/db/SongSort.hxx \
+	src/db/update/UpdateDomain.cxx src/db/update/UpdateDomain.hxx \
+	src/db/update/Service.cxx src/db/update/Service.hxx \
+	src/db/update/UpdateGlue.cxx \
+	src/db/update/Queue.cxx src/db/update/Queue.hxx \
+	src/db/update/UpdateIO.cxx src/db/update/UpdateIO.hxx \
+	src/db/update/Editor.cxx src/db/update/Editor.hxx \
+	src/db/update/Walk.cxx src/db/update/Walk.hxx \
+	src/db/update/UpdateSong.cxx \
+	src/db/update/Container.cxx \
+	src/db/update/Remove.cxx src/db/update/Remove.hxx \
+	src/db/update/ExcludeList.cxx src/db/update/ExcludeList.hxx \
+	src/db/Uri.hxx \
+	src/db/Directory.cxx src/db/Directory.hxx \
+	src/db/DirectorySave.cxx src/db/DirectorySave.hxx \
+	src/db/DatabaseSimple.hxx \
+	src/db/DatabaseGlue.cxx src/db/DatabaseGlue.hxx \
+	src/db/DatabaseSong.cxx src/db/DatabaseSong.hxx \
+	src/db/DatabasePrint.cxx src/db/DatabasePrint.hxx \
+	src/db/DatabaseQueue.cxx src/db/DatabaseQueue.hxx \
+	src/db/DatabasePlaylist.cxx src/db/DatabasePlaylist.hxx \
+	src/db/DatabaseError.cxx src/db/DatabaseError.hxx \
+	src/db/DatabaseLock.cxx src/db/DatabaseLock.hxx \
+	src/db/DatabaseSave.cxx src/db/DatabaseSave.hxx \
+	src/db/DatabasePlugin.hxx \
+	src/db/DatabaseListener.hxx \
+	src/db/Visitor.hxx \
+	src/db/Selection.cxx src/db/Selection.hxx
+endif
+
 UPNP_SOURCES = \
 	src/lib/upnp/Init.cxx src/lib/upnp/Init.hxx \
 	src/lib/upnp/ClientInit.cxx src/lib/upnp/ClientInit.hxx \
@@ -451,6 +454,10 @@ endif
 
 # database plugins
 
+if ENABLE_DATABASE
+
+noinst_LIBRARIES += libdb_plugins.a
+
 libdb_plugins_a_SOURCES = \
 	src/db/Registry.cxx src/db/Registry.hxx \
 	src/db/Helpers.cxx src/db/Helpers.hxx \
@@ -479,6 +486,8 @@ DB_LIBS += \
 	$(UPNP_LIBS)
 endif
 
+endif
+
 # archive plugins
 
 if ENABLE_ARCHIVE
@@ -1203,9 +1212,12 @@ C_TESTS = \
 	test/test_mixramp \
 	test/test_icy_parser \
 	test/test_pcm \
-	test/test_translate_song \
 	test/test_queue_priority
 
+if ENABLE_DATABASE
+C_TESTS += test/test_translate_song
+endif
+
 if ENABLE_ARCHIVE
 C_TESTS += test/test_archive
 endif
@@ -1216,7 +1228,6 @@ noinst_PROGRAMS = \
 	$(C_TESTS) \
 	test/read_conf \
 	test/run_resolver \
-	test/DumpDatabase \
 	test/run_input \
 	test/dump_text_file \
 	test/dump_playlist \
@@ -1228,6 +1239,10 @@ noinst_PROGRAMS = \
 	test/run_normalize \
 	test/software_volume
 
+if ENABLE_DATABASE
+noinst_PROGRAMS += test/DumpDatabase
+endif
+
 if ENABLE_NEIGHBOR_PLUGINS
 noinst_PROGRAMS += test/run_neighbor_explorer
 endif
@@ -1267,6 +1282,8 @@ test_run_resolver_SOURCES = \
 	src/Log.cxx src/LogBackend.cxx \
 	test/run_resolver.cxx
 
+if ENABLE_DATABASE
+
 test_DumpDatabase_LDADD = \
 	$(DB_LIBS) \
 	$(TAG_LIBS) \
@@ -1294,6 +1311,8 @@ if HAVE_LIBUPNP
 test_DumpDatabase_SOURCES += src/lib/expat/ExpatParser.cxx
 endif
 
+endif
+
 test_run_input_LDADD = \
 	$(INPUT_LIBS) \
 	$(ARCHIVE_LIBS) \
@@ -1709,6 +1728,8 @@ test_test_archive_LDADD = \
 	$(GLIB_LIBS) \
 	$(CPPUNIT_LIBS)
 
+if ENABLE_DATABASE
+
 test_test_translate_song_SOURCES = \
 	src/playlist/PlaylistSong.cxx \
 	src/DetachedSong.cxx \
@@ -1724,6 +1745,8 @@ test_test_translate_song_LDADD = \
 	$(GLIB_LIBS) \
 	$(CPPUNIT_LIBS)
 
+endif
+
 test_test_queue_priority_SOURCES = \
 	src/queue/Queue.cxx \
 	src/DetachedSong.cxx \

configure.ac

@@ -239,10 +239,22 @@ dnl ---------------------------------------------------------------------------
 dnl Allow tools to be specifically built
 dnl ---------------------------------------------------------------------------
 
+AC_ARG_ENABLE(database,
+	AS_HELP_STRING([--enable-database],
+		[enable support for the music database]),,
+	enable_database=yes)
+AM_CONDITIONAL(ENABLE_DATABASE, test x$enable_database = xyes)
+if test x$enable_database = xyes; then
+	database_auto=auto
+	AC_DEFINE(ENABLE_DATABASE, 1, [Define to enable the music database])
+else
+	database_auto=no
+fi
+
 AC_ARG_ENABLE(libmpdclient,
 	AS_HELP_STRING([--enable-libmpdclient],
 		[enable support for the MPD client]),,
-	enable_libmpdclient=auto)
+	enable_libmpdclient=$database_auto)
 
 AC_ARG_ENABLE(expat,
 	AS_HELP_STRING([--enable-expat],
@@ -252,7 +264,7 @@ AC_ARG_ENABLE(expat,
 AC_ARG_ENABLE(upnp,
 	AS_HELP_STRING([--enable-upnp],
 		[enable UPnP client support (default: auto)]),,
-	enable_upnp=auto)
+	enable_upnp=$database_auto)
 
 AC_ARG_ENABLE(adplug,
 	AS_HELP_STRING([--enable-adplug],
@@ -487,7 +499,7 @@ AC_ARG_ENABLE(solaris_output,
 AC_ARG_ENABLE(sqlite,
 	AS_HELP_STRING([--enable-sqlite],
 		[enable support for the SQLite database]),,
-	[enable_sqlite=auto])
+	[enable_sqlite=$database_auto])
 
 AC_ARG_ENABLE(systemd-daemon,
 	AS_HELP_STRING([--enable-systemd-daemon],

src/CommandLine.cxx

@@ -23,8 +23,6 @@
 #include "LogInit.hxx"
 #include "Log.hxx"
 #include "config/ConfigGlobal.hxx"
-#include "db/Registry.hxx"
-#include "db/DatabasePlugin.hxx"
 #include "decoder/DecoderList.hxx"
 #include "decoder/DecoderPlugin.hxx"
 #include "output/Registry.hxx"
@@ -42,6 +40,11 @@
 #include "util/OptionDef.hxx"
 #include "util/OptionParser.hxx"
 
+#ifdef ENABLE_DATABASE
+#include "db/Registry.hxx"
+#include "db/DatabasePlugin.hxx"
+#endif
+
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 #include "neighbor/Registry.hxx"
 #include "neighbor/NeighborPlugin.hxx"
@@ -102,12 +105,15 @@ static void version(void)
 	     "Copyright (C) 2003-2007 Warren Dukes <warren.dukes@gmail.com>\n"
 	     "Copyright (C) 2008-2014 Max Kellermann <max@duempel.org>\n"
 	     "This is free software; see the source for copying conditions.  There is NO\n"
-	     "warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
-	     "\n"
+	     "warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
+
+#ifdef ENABLE_DATABASE
+	puts("\n"
 	     "Database plugins:");
 
 	for (auto i = database_plugins; *i != nullptr; ++i)
 		printf(" %s", (*i)->name);
+#endif
 
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 	puts("\n\n"

src/Instance.cxx

@@ -23,6 +23,8 @@
 #include "Idle.hxx"
 #include "Stats.hxx"
 
+#ifdef ENABLE_DATABASE
+
 void
 Instance::DeleteSong(const char *uri)
 {
@@ -37,6 +39,8 @@ Instance::DatabaseModified()
 	idle_add(IDLE_DATABASE);
 }
 
+#endif
+
 void
 Instance::TagModified()
 {
@@ -49,12 +53,16 @@ Instance::SyncWithPlayer()
 	partition->SyncWithPlayer();
 }
 
+#ifdef ENABLE_DATABASE
+
 void
 Instance::OnDatabaseModified()
 {
 	DatabaseModified();
 }
 
+#endif
+
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 
 void

src/Instance.hxx

@@ -21,7 +21,6 @@
 #define MPD_INSTANCE_HXX
 
 #include "check.h"
-#include "db/DatabaseListener.hxx"
 #include "Compiler.h"
 
 #ifdef ENABLE_NEIGHBOR_PLUGINS
@@ -29,26 +28,42 @@
 class NeighborGlue;
 #endif
 
+#ifdef ENABLE_DATABASE
+#include "db/DatabaseListener.hxx"
 class UpdateService;
+#endif
+
 class ClientList;
 struct Partition;
 
 struct Instance final
-	: public DatabaseListener
+#if defined(ENABLE_DATABASE) || defined(ENABLE_NEIGHBOR_PLUGINS)
+	:
+#endif
+#ifdef ENABLE_DATABASE
+	public DatabaseListener
 #ifdef ENABLE_NEIGHBOR_PLUGINS
-	, public NeighborListener
+	,
+#endif
+#endif
+#ifdef ENABLE_NEIGHBOR_PLUGINS
+	public NeighborListener
 #endif
 {
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 	NeighborGlue *neighbors;
 #endif
 
+#ifdef ENABLE_DATABASE
 	UpdateService *update;
+#endif
 
 	ClientList *client_list;
 
 	Partition *partition;
 
+#ifdef ENABLE_DATABASE
+
 	void DeleteSong(const char *uri);
 
 	/**
@@ -57,6 +72,8 @@ struct Instance final
 	 */
 	void DatabaseModified();
 
+#endif
+
 	/**
 	 * A tag in the play queue has been modified by the player
 	 * thread.  Propagate the change to all subsystems.
@@ -69,7 +86,9 @@ struct Instance final
 	void SyncWithPlayer();
 
 private:
+#ifdef ENABLE_DATABASE
 	virtual void OnDatabaseModified();
+#endif
 
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 	/* virtual methods from class NeighborListener */

src/Main.cxx

@@ -23,13 +23,10 @@
 #include "CommandLine.hxx"
 #include "PlaylistFile.hxx"
 #include "PlaylistGlobal.hxx"
-#include "db/update/Service.hxx"
 #include "MusicChunk.hxx"
 #include "StateFile.hxx"
 #include "PlayerThread.hxx"
 #include "Mapper.hxx"
-#include "db/DatabaseGlue.hxx"
-#include "db/DatabaseSimple.hxx"
 #include "Permission.hxx"
 #include "Listen.hxx"
 #include "client/Client.hxx"
@@ -67,6 +64,12 @@
 #include "config/ConfigOption.hxx"
 #include "Stats.hxx"
 
+#ifdef ENABLE_DATABASE
+#include "db/update/Service.hxx"
+#include "db/DatabaseGlue.hxx"
+#include "db/DatabaseSimple.hxx"
+#endif
+
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 #include "neighbor/Glue.hxx"
 #endif
@@ -150,6 +153,8 @@ glue_mapper_init(Error &error)
 	return true;
 }
 
+#ifdef ENABLE_DATABASE
+
 /**
  * Returns the database.  If this function returns false, this has not
  * succeeded, and the caller should create the database after the
@@ -202,6 +207,8 @@ glue_db_init_and_load(void)
 	return !db_is_simple() || db_exists();
 }
 
+#endif
+
 /**
  * Configure and initialize the sticker subsystem.
  */
@@ -449,11 +456,13 @@ int mpd_main(int argc, char *argv[])
 
 	decoder_plugin_init_all();
 
+#ifdef ENABLE_DATABASE
 	const bool create_db = !glue_db_init_and_load();
 
 	instance->update = db_is_simple()
 		? new UpdateService(*main_loop)
 		: nullptr;
+#endif
 
 	glue_sticker_init();
 
@@ -490,6 +499,7 @@ int mpd_main(int argc, char *argv[])
 
 	player_create(instance->partition->pc);
 
+#ifdef ENABLE_DATABASE
 	if (create_db) {
 		/* the database failed to load: recreate the
 		   database */
@@ -497,6 +507,7 @@ int mpd_main(int argc, char *argv[])
 		if (job == 0)
 			FatalError("directory update failed");
 	}
+#endif
 
 	if (!glue_state_file_init(error)) {
 		LogError(error);
@@ -562,6 +573,7 @@ int mpd_main(int argc, char *argv[])
 	}
 #endif
 
+#ifdef ENABLE_DATABASE
 	delete instance->update;
 
 	const clock_t start = clock();
@@ -569,6 +581,7 @@ int mpd_main(int argc, char *argv[])
 	FormatDebug(main_domain,
 		    "db_finish took %f seconds",
 		    ((float)(clock()-start))/CLOCKS_PER_SEC);
+#endif
 
 #ifdef ENABLE_SQLITE
 	sticker_global_finish();
@@ -578,7 +591,11 @@ int mpd_main(int argc, char *argv[])
 
 	playlist_list_global_finish();
 	input_stream_global_finish();
+
+#ifdef ENABLE_DATABASE
 	mapper_finish();
+#endif
+
 	delete instance->partition;
 	command_finish();
 	decoder_plugin_deinit_all();

src/Mapper.cxx

@@ -42,6 +42,8 @@
 
 static constexpr Domain mapper_domain("mapper");
 
+#ifdef ENABLE_DATABASE
+
 /**
  * The absolute path of the music directory encoded in UTF-8.
  */
@@ -54,6 +56,8 @@ static size_t music_dir_utf8_length;
  */
 static AllocatedPath music_dir_fs = AllocatedPath::Null();
 
+#endif
+
 /**
  * The absolute path of the playlist directory encoded in the
  * filesystem character set.
@@ -91,6 +95,8 @@ check_directory(const char *path_utf8, const AllocatedPath &path_fs)
 			    "No permission to read directory: %s", path_utf8);
 }
 
+#ifdef ENABLE_DATABASE
+
 static void
 mapper_set_music_dir(AllocatedPath &&path)
 {
@@ -105,6 +111,8 @@ mapper_set_music_dir(AllocatedPath &&path)
 	check_directory(music_dir_utf8.c_str(), music_dir_fs);
 }
 
+#endif
+
 static void
 mapper_set_playlist_dir(AllocatedPath &&path)
 {
@@ -119,8 +127,12 @@ mapper_set_playlist_dir(AllocatedPath &&path)
 void
 mapper_init(AllocatedPath &&_music_dir, AllocatedPath &&_playlist_dir)
 {
+#ifdef ENABLE_DATABASE
 	if (!_music_dir.IsNull())
 		mapper_set_music_dir(std::move(_music_dir));
+#else
+	(void)_music_dir;
+#endif
 
 	if (!_playlist_dir.IsNull())
 		mapper_set_playlist_dir(std::move(_playlist_dir));
@@ -130,6 +142,8 @@ void mapper_finish(void)
 {
 }
 
+#ifdef ENABLE_DATABASE
+
 const char *
 mapper_get_music_directory_utf8(void)
 {
@@ -144,17 +158,25 @@ mapper_get_music_directory_fs(void)
 	return music_dir_fs;
 }
 
+#endif
+
 const char *
 map_to_relative_path(const char *path_utf8)
 {
+#ifdef ENABLE_DATABASE
 	return !music_dir_utf8.empty() &&
 		memcmp(path_utf8, music_dir_utf8.c_str(),
 		       music_dir_utf8_length) == 0 &&
 		PathTraitsUTF8::IsSeparator(path_utf8[music_dir_utf8_length])
 		? path_utf8 + music_dir_utf8_length + 1
 		: path_utf8;
+#else
+	return path_utf8;
+#endif
 }
 
+#ifdef ENABLE_DATABASE
+
 AllocatedPath
 map_uri_fs(const char *uri)
 {
@@ -240,15 +262,24 @@ map_song_fs(const Song &song)
 		: map_directory_child_fs(*song.parent, song.uri);
 }
 
+#endif
+
 AllocatedPath
 map_song_fs(const DetachedSong &song)
 {
 	if (song.IsAbsoluteFile())
 		return AllocatedPath::FromUTF8(song.GetRealURI());
-	else
+	else {
+#ifdef ENABLE_DATABASE
 		return map_uri_fs(song.GetURI());
+#else
+		return AllocatedPath::Null();
+#endif
+	}
 }
 
+#ifdef ENABLE_DATABASE
+
 std::string
 map_fs_to_utf8(const char *path_fs)
 {
@@ -261,6 +292,8 @@ map_fs_to_utf8(const char *path_fs)
 	return PathToUTF8(path_fs);
 }
 
+#endif
+
 const AllocatedPath &
 map_spl_path(void)
 {

src/Mapper.hxx

@@ -41,6 +41,8 @@ mapper_init(AllocatedPath &&music_dir, AllocatedPath &&playlist_dir);
 
 void mapper_finish(void);
 
+#ifdef ENABLE_DATABASE
+
 /**
  * Return the absolute path of the music directory encoded in UTF-8 or
  * nullptr if no music directory was configured.
@@ -67,6 +69,8 @@ mapper_has_music_directory(void)
 	return mapper_get_music_directory_utf8() != nullptr;
 }
 
+#endif
+
 /**
  * If the specified absolute path points inside the music directory,
  * this function converts it to a relative path.  If not, it returns
@@ -76,6 +80,8 @@ gcc_pure
 const char *
 map_to_relative_path(const char *path_utf8);
 
+#ifdef ENABLE_DATABASE
+
 /**
  * Determines the absolute file system path of a relative URI.  This
  * is basically done by converting the URI to the file system charset
@@ -126,10 +132,14 @@ gcc_pure
 AllocatedPath
 map_song_fs(const Song &song);
 
+#endif
+
 gcc_pure
 AllocatedPath
 map_song_fs(const DetachedSong &song);
 
+#ifdef ENABLE_DATABASE
+
 /**
  * Maps a file system path (relative to the music directory or
  * absolute) to a relative path in UTF-8 encoding.
@@ -142,6 +152,8 @@ gcc_pure
 std::string
 map_fs_to_utf8(const char *path_fs);
 
+#endif
+
 /**
  * Returns the playlist directory.
  */

src/Partition.hxx

@@ -79,10 +79,14 @@ struct Partition {
 		return playlist.DeleteRange(pc, start, end);
 	}
 
+#ifdef ENABLE_DATABASE
+
 	void DeleteSong(const char *uri) {
 		playlist.DeleteSong(pc, uri);
 	}
 
+#endif
+
 	void Shuffle(unsigned start, unsigned end) {
 		playlist.Shuffle(pc, start, end);
 	}

src/PlaylistEdit.cxx

@@ -112,8 +112,10 @@ playlist::AppendURI(PlayerControl &pc,
 	if (uri_has_scheme(uri)) {
 		song = new DetachedSong(uri);
 	} else {
+#ifdef ENABLE_DATABASE
 		song = DatabaseDetachSong(uri, IgnoreError());
 		if (song == nullptr)
+#endif
 			return PlaylistResult::NO_SUCH_SONG;
 	}
 

src/PlaylistFile.cxx

@@ -243,6 +243,7 @@ LoadPlaylistFile(const char *utf8path, Error &error)
 		std::string uri_utf8;
 
 		if (!uri_has_scheme(s)) {
+#ifdef ENABLE_DATABASE
 			uri_utf8 = map_fs_to_utf8(s);
 			if (uri_utf8.empty()) {
 				if (PathTraitsFS::IsAbsolute(s)) {
@@ -254,6 +255,9 @@ LoadPlaylistFile(const char *utf8path, Error &error)
 				} else
 					continue;
 			}
+#else
+			continue;
+#endif
 		} else {
 			uri_utf8 = PathToUTF8(s);
 			if (uri_utf8.empty())
@@ -404,6 +408,7 @@ spl_append_uri(const char *url, const char *utf8file, Error &error)
 		return spl_append_song(utf8file, DetachedSong(url),
 				       error);
 	} else {
+#ifdef ENABLE_DATABASE
 		DetachedSong *song = DatabaseDetachSong(url, error);
 		if (song == nullptr)
 			return false;
@@ -411,6 +416,9 @@ spl_append_uri(const char *url, const char *utf8file, Error &error)
 		bool success = spl_append_song(utf8file, *song, error);
 		delete song;
 		return success;
+#else
+		return false;
+#endif
 	}
 }
 

src/PlaylistPrint.cxx

@@ -110,6 +110,8 @@ playlist_print_changes_position(Client &client,
 	queue_print_changes_position(client, playlist.queue, version);
 }
 
+#ifdef ENABLE_DATABASE
+
 static bool
 PrintSongDetails(Client &client, const char *uri_utf8)
 {
@@ -126,16 +128,24 @@ PrintSongDetails(Client &client, const char *uri_utf8)
 	return true;
 }
 
+#endif
+
 bool
 spl_print(Client &client, const char *name_utf8, bool detail,
 	  Error &error)
 {
+#ifndef ENABLE_DATABASE
+	(void)detail;
+#endif
+
 	PlaylistFileContents contents = LoadPlaylistFile(name_utf8, error);
 	if (contents.empty() && error.IsDefined())
 		return false;
 
 	for (const auto &uri_utf8 : contents) {
+#ifdef ENABLE_DATABASE
 		if (!detail || !PrintSongDetails(client, uri_utf8.c_str()))
+#endif
 			client_printf(client, SONG_FILE "%s\n",
 				      uri_utf8.c_str());
 	}

src/PlaylistSave.cxx

@@ -55,10 +55,14 @@ playlist_print_song(FILE *file, const DetachedSong &song)
 void
 playlist_print_uri(FILE *file, const char *uri)
 {
-	auto path = playlist_saveAbsolutePaths && !uri_has_scheme(uri) &&
+	auto path =
+#ifdef ENABLE_DATABASE
+		playlist_saveAbsolutePaths && !uri_has_scheme(uri) &&
 		!PathTraitsUTF8::IsAbsolute(uri)
 		? map_uri_fs(uri)
-		: AllocatedPath::FromUTF8(uri);
+		:
+#endif
+		AllocatedPath::FromUTF8(uri);
 
 	if (!path.IsNull())
 		fprintf(file, "%s\n", path.c_str());

src/SongUpdate.cxx

@@ -39,6 +39,8 @@
 #include <string.h>
 #include <sys/stat.h>
 
+#ifdef ENABLE_DATABASE
+
 Song *
 Song::LoadFile(const char *path_utf8, Directory &parent)
 {
@@ -64,6 +66,8 @@ Song::LoadFile(const char *path_utf8, Directory &parent)
 	return song;
 }
 
+#endif
+
 /**
  * Attempts to load APE or ID3 tags from the specified file.
  */
@@ -75,6 +79,8 @@ tag_scan_fallback(Path path,
 		tag_id3_scan(path, handler, handler_ctx);
 }
 
+#ifdef ENABLE_DATABASE
+
 bool
 Song::UpdateFile()
 {
@@ -125,6 +131,8 @@ Song::UpdateFileInArchive()
 	return true;
 }
 
+#endif
+
 bool
 DetachedSong::Update()
 {

src/Stats.cxx

@@ -37,6 +37,8 @@
 static unsigned start_time;
 #endif
 
+#ifdef ENABLE_DATABASE
+
 static DatabaseStats stats;
 
 enum class StatsValidity : uint8_t {
@@ -45,6 +47,8 @@ enum class StatsValidity : uint8_t {
 
 static StatsValidity stats_validity = StatsValidity::INVALID;
 
+#endif
+
 void stats_global_init(void)
 {
 #ifndef WIN32
@@ -52,6 +56,8 @@ void stats_global_init(void)
 #endif
 }
 
+#ifdef ENABLE_DATABASE
+
 void
 stats_invalidate()
 {
@@ -120,6 +126,8 @@ db_stats_print(Client &client)
 			      (unsigned long)update_stamp);
 }
 
+#endif
+
 void
 stats_print(Client &client)
 {
@@ -133,6 +141,8 @@ stats_print(Client &client)
 #endif
 		      (unsigned long)(client.player_control.GetTotalPlayTime() + 0.5));
 
+#ifdef ENABLE_DATABASE
 	if (GetDatabase() != nullptr)
 		db_stats_print(client);
+#endif
 }

src/command/AllCommands.cxx

@@ -85,7 +85,9 @@ static const struct command commands[] = {
 	{ "commands", PERMISSION_NONE, 0, 0, handle_commands },
 	{ "config", PERMISSION_ADMIN, 0, 0, handle_config },
 	{ "consume", PERMISSION_CONTROL, 1, 1, handle_consume },
+#ifdef ENABLE_DATABASE
 	{ "count", PERMISSION_READ, 2, -1, handle_count },
+#endif
 	{ "crossfade", PERMISSION_CONTROL, 1, 1, handle_crossfade },
 	{ "currentsong", PERMISSION_READ, 0, 0, handle_currentsong },
 	{ "decoders", PERMISSION_READ, 0, 0, handle_decoders },
@@ -93,13 +95,17 @@ static const struct command commands[] = {
 	{ "deleteid", PERMISSION_CONTROL, 1, 1, handle_deleteid },
 	{ "disableoutput", PERMISSION_ADMIN, 1, 1, handle_disableoutput },
 	{ "enableoutput", PERMISSION_ADMIN, 1, 1, handle_enableoutput },
+#ifdef ENABLE_DATABASE
 	{ "find", PERMISSION_READ, 2, -1, handle_find },
 	{ "findadd", PERMISSION_READ, 2, -1, handle_findadd},
+#endif
 	{ "idle", PERMISSION_READ, 0, -1, handle_idle },
 	{ "kill", PERMISSION_ADMIN, -1, -1, handle_kill },
+#ifdef ENABLE_DATABASE
 	{ "list", PERMISSION_READ, 1, -1, handle_list },
 	{ "listall", PERMISSION_READ, 0, 1, handle_listall },
 	{ "listallinfo", PERMISSION_READ, 0, 1, handle_listallinfo },
+#endif
 #ifdef ENABLE_NEIGHBOR_PLUGINS
 	{ "listneighbors", PERMISSION_READ, 0, 0, handle_listneighbors },
 #endif
@@ -146,9 +152,11 @@ static const struct command commands[] = {
 	{ "rescan", PERMISSION_CONTROL, 0, 1, handle_rescan },
 	{ "rm", PERMISSION_CONTROL, 1, 1, handle_rm },
 	{ "save", PERMISSION_CONTROL, 1, 1, handle_save },
+#ifdef ENABLE_DATABASE
 	{ "search", PERMISSION_READ, 2, -1, handle_search },
 	{ "searchadd", PERMISSION_ADD, 2, -1, handle_searchadd },
 	{ "searchaddpl", PERMISSION_CONTROL, 3, -1, handle_searchaddpl },
+#endif
 	{ "seek", PERMISSION_CONTROL, 2, 2, handle_seek },
 	{ "seekcur", PERMISSION_CONTROL, 1, 1, handle_seekcur },
 	{ "seekid", PERMISSION_CONTROL, 2, 2, handle_seekid },

src/command/CommandError.cxx

@@ -101,6 +101,7 @@ print_error(Client &client, const Error &error)
 		command_error(client, (ack)error.GetCode(),
 			      "%s", error.GetMessage());
 		return CommandResult::ERROR;
+#ifdef ENABLE_DATABASE
 	} else if (error.IsDomain(db_domain)) {
 		switch ((enum db_error)error.GetCode()) {
 		case DB_DISABLED:
@@ -112,6 +113,7 @@ print_error(Client &client, const Error &error)
 			command_error(client, ACK_ERROR_NO_EXIST, "Not found");
 			return CommandResult::ERROR;
 		}
+#endif
 	} else if (error.IsDomain(errno_domain)) {
 		command_error(client, ACK_ERROR_SYSTEM, "%s",
 			      strerror(error.GetCode()));

src/command/FileCommands.cxx

@@ -127,12 +127,17 @@ handle_read_comments(Client &client, gcc_unused int argc, char *argv[])
 	} else if (uri_has_scheme(uri)) {
 		return read_stream_comments(client, uri);
 	} else if (*uri != '/') {
+#ifdef ENABLE_DATABASE
 		path_fs = map_uri_fs(uri);
 		if (path_fs.IsNull()) {
 			command_error(client, ACK_ERROR_NO_EXIST,
 				      "No such file");
 			return CommandResult::ERROR;
 		}
+#else
+		command_error(client, ACK_ERROR_NO_EXIST, "No database");
+		return CommandResult::ERROR;
+#endif
 	} else {
 		command_error(client, ACK_ERROR_NO_EXIST, "No such file");
 		return CommandResult::ERROR;

src/command/OtherCommands.cxx

@@ -19,8 +19,6 @@
 
 #include "config.h"
 #include "OtherCommands.hxx"
-#include "DatabaseCommands.hxx"
-#include "db/update/Service.hxx"
 #include "CommandError.hxx"
 #include "db/Uri.hxx"
 #include "DetachedSong.hxx"
@@ -49,6 +47,11 @@
 #include "Instance.hxx"
 #include "Idle.hxx"
 
+#ifdef ENABLE_DATABASE
+#include "DatabaseCommands.hxx"
+#include "db/update/Service.hxx"
+#endif
+
 #include <assert.h>
 #include <string.h>
 
@@ -170,14 +173,21 @@ handle_lsinfo(Client &client, int argc, char *argv[])
 		return CommandResult::OK;
 	}
 
+#ifdef ENABLE_DATABASE
 	CommandResult result = handle_lsinfo2(client, argc, argv);
 	if (result != CommandResult::OK)
 		return result;
+#endif
 
 	if (isRootDirectory(uri)) {
 		Error error;
 		const auto &list = ListPlaylistFiles(error);
 		print_spl_list(client, list);
+	} else {
+#ifndef ENABLE_DATABASE
+		command_error(client, ACK_ERROR_NO_EXIST, "No database");
+		return CommandResult::ERROR;
+#endif
 	}
 
 	return CommandResult::OK;
@@ -186,6 +196,7 @@ handle_lsinfo(Client &client, int argc, char *argv[])
 static CommandResult
 handle_update(Client &client, int argc, char *argv[], bool discard)
 {
+#ifdef ENABLE_DATABASE
 	const char *path = "";
 
 	assert(argc <= 2);
@@ -217,6 +228,15 @@ handle_update(Client &client, int argc, char *argv[], bool discard)
 			      "already updating");
 		return CommandResult::ERROR;
 	}
+#else
+	(void)client;
+	(void)argc;
+	(void)argv;
+	(void)discard;
+
+	command_error(client, ACK_ERROR_NO_EXIST, "No database");
+	return CommandResult::ERROR;
+#endif
 }
 
 CommandResult
@@ -329,9 +349,11 @@ handle_config(Client &client,
 		return CommandResult::ERROR;
 	}
 
+#ifdef ENABLE_DATABASE
 	const char *path = mapper_get_music_directory_utf8();
 	if (path != nullptr)
 		client_printf(client, "music_directory: %s\n", path);
+#endif
 
 	return CommandResult::OK;
 }

src/command/PlayerCommands.cxx

@@ -22,7 +22,6 @@
 #include "CommandError.hxx"
 #include "Playlist.hxx"
 #include "PlaylistPrint.hxx"
-#include "db/update/Service.hxx"
 #include "client/Client.hxx"
 #include "mixer/Volume.hxx"
 #include "Partition.hxx"
@@ -32,6 +31,10 @@
 #include "AudioFormat.hxx"
 #include "ReplayGainConfig.hxx"
 
+#ifdef ENABLE_DATABASE
+#include "db/update/Service.hxx"
+#endif
+
 #define COMMAND_STATUS_STATE            "state"
 #define COMMAND_STATUS_REPEAT           "repeat"
 #define COMMAND_STATUS_SINGLE           "single"
@@ -187,6 +190,7 @@ handle_status(Client &client,
 		}
 	}
 
+#ifdef ENABLE_DATABASE
 	const UpdateService *update_service = client.partition.instance.update;
 	unsigned updateJobId = update_service != nullptr
 		? update_service->GetId()
@@ -196,6 +200,7 @@ handle_status(Client &client,
 			      COMMAND_STATUS_UPDATING_DB ": %i\n",
 			      updateJobId);
 	}
+#endif
 
 	Error error = client.player_control.LockGetError();
 	if (error.IsDefined())

src/command/PlaylistCommands.cxx

@@ -193,9 +193,14 @@ handle_playlistadd(Client &client, gcc_unused int argc, char *argv[])
 		}
 
 		success = spl_append_uri(uri, playlist, error);
-	} else
+	} else {
+#ifdef ENABLE_DATABASE
 		success = search_add_to_playlist(uri, playlist, nullptr,
 						 error);
+#else
+		success = false;
+#endif
+	}
 
 	if (!success && !error.IsDefined()) {
 		command_error(client, ACK_ERROR_NO_EXIST,

src/command/QueueCommands.cxx

@@ -74,11 +74,16 @@ handle_add(Client &client, gcc_unused int argc, char *argv[])
 		return print_playlist_result(client, result);
 	}
 
+#ifdef ENABLE_DATABASE
 	const DatabaseSelection selection(uri, true);
 	Error error;
 	return AddFromDatabase(client.partition, selection, error)
 		? CommandResult::OK
 		: print_error(client, error);
+#else
+	command_error(client, ACK_ERROR_NO_EXIST, "No database");
+	return CommandResult::ERROR;
+#endif
 }
 
 CommandResult

src/playlist/PlaylistMapper.cxx

@@ -64,6 +64,8 @@ playlist_open_in_playlist_dir(const char *uri, Mutex &mutex, Cond &cond,
 	return playlist_open_path(path_fs.c_str(), mutex, cond, is_r);
 }
 
+#ifdef ENABLE_DATABASE
+
 /**
  * Load a playlist from the configured music directory.
  */
@@ -80,6 +82,8 @@ playlist_open_in_music_dir(const char *uri, Mutex &mutex, Cond &cond,
 	return playlist_open_path(path.c_str(), mutex, cond, is_r);
 }
 
+#endif
+
 SongEnumerator *
 playlist_mapper_open(const char *uri, Mutex &mutex, Cond &cond,
 		     InputStream **is_r)
@@ -91,12 +95,14 @@ playlist_mapper_open(const char *uri, Mutex &mutex, Cond &cond,
 			return playlist;
 	}
 
+#ifdef ENABLE_DATABASE
 	if (uri_safe_local(uri)) {
 		auto playlist = playlist_open_in_music_dir(uri, mutex, cond,
 							   is_r);
 		if (playlist != nullptr)
 			return playlist;
 	}
+#endif
 
 	return nullptr;
 }

src/playlist/PlaylistSong.cxx

@@ -79,6 +79,7 @@ playlist_check_load_song(DetachedSong &song)
 		apply_song_metadata(song, tmp);
 		return true;
 	} else {
+#ifdef ENABLE_DATABASE
 		DetachedSong *tmp = DatabaseDetachSong(uri, IgnoreError());
 		if (tmp == nullptr)
 			return false;
@@ -86,6 +87,9 @@ playlist_check_load_song(DetachedSong &song)
 		apply_song_metadata(song, *tmp);
 		delete tmp;
 		return true;
+#else
+		return false;
+#endif
 	}
 }
 

src/queue/QueueSave.cxx

@@ -110,8 +110,10 @@ queue_load_song(TextFile &file, const char *line, Queue &queue)
 		if (uri_has_scheme(uri)) {
 			song = new DetachedSong(uri);
 		} else {
+#ifdef ENABLE_DATABASE
 			song = DatabaseDetachSong(uri, IgnoreError());
 			if (song == nullptr)
+#endif
 				return;
 		}
 	}