meson: make it possible to compile without dbus

Make an option to disable dbus and all the code that depends on
it.

Fixes #1685

meson.build

@@ -322,7 +322,11 @@ mathlib = cc.find_library('m', required : false)
 rt_lib = cc.find_library('rt', required : false) # clock_gettime
 dl_lib = cc.find_library('dl', required : false)
 pthread_lib = dependency('threads')
-dbus_dep = dependency('dbus-1')
+dbus_dep = dependency('dbus-1', required : get_option('dbus'))
+summary({'dbus (Bluetooth, rtkit, portal, pw-reserve)': dbus_dep.found()}, bool_yn: true, section: 'Misc dependencies')
+if dbus_dep.found()
+  cdata.set('HAVE_DBUS', 1)
+endif
 sdl_dep = dependency('sdl2', required : get_option('sdl2'))
 summary({'SDL 2': sdl_dep.found()}, bool_yn: true, section: 'Misc dependencies')
 readline_dep = dependency('readline', required : false)

meson_options.txt

@@ -137,6 +137,10 @@ option('v4l2',
        description: 'Enable v4l2 spa plugin integration',
        type: 'feature',
        value: 'auto')
+option('dbus',
+       description: 'Enable code that depends on dbus',
+       type: 'feature',
+       value: 'enabled')
 option('libcamera',
        description: 'Enable libcamera spa plugin integration',
        type: 'feature',

spa/plugins/support/meson.build

@@ -34,14 +34,16 @@ if not get_option('evl').disabled()
     install_dir : spa_plugindir / 'support')
 endif
 
-spa_dbus_sources = ['dbus.c']
+if dbus_dep.found()
+  spa_dbus_sources = ['dbus.c']
 
-spa_dbus_lib = shared_library('spa-dbus',
-  spa_dbus_sources,
-  include_directories : [ spa_inc],
-  dependencies : [dbus_dep, ],
-  install : true,
-  install_dir : spa_plugindir / 'support')
+  spa_dbus_lib = shared_library('spa-dbus',
+    spa_dbus_sources,
+    include_directories : [ spa_inc],
+    dependencies : [dbus_dep, ],
+    install : true,
+    install_dir : spa_plugindir / 'support')
+endif
 
 
 if systemd_dep.found()

src/modules/meson.build

@@ -201,15 +201,10 @@ pipewire_module_protocol_native = shared_library('pipewire-module-protocol-nativ
 
 pipewire_module_protocol_pulse_deps = pipewire_module_protocol_deps
 
-if dbus_dep.found()
-  pipewire_module_protocol_pulse_deps += dbus_dep
-endif
-
 pipewire_module_protocol_pulse_sources = [
   'module-protocol-pulse.c',
   'module-protocol-pulse/client.c',
   'module-protocol-pulse/collect.c',
-  'module-protocol-pulse/dbus-name.c',
   'module-protocol-pulse/extension.c',
   'module-protocol-pulse/format.c',
   'module-protocol-pulse/manager.c',
@@ -246,6 +241,14 @@ pipewire_module_protocol_pulse_sources = [
   'module-protocol-pulse/modules/module-zeroconf-discover.c',
 ]
 
+if dbus_dep.found()
+  pipewire_module_protocol_pulse_sources += [
+    'module-protocol-pulse/dbus-name.c',
+  ]
+  pipewire_module_protocol_pulse_deps += dbus_dep
+  cdata.set('HAVE_DBUS', 1)
+endif
+
 if avahi_dep.found()
   pipewire_module_protocol_pulse_sources += [
     'module-protocol-pulse/modules/module-zeroconf-publish.c',

src/modules/module-protocol-pulse/pulse-server.c

@@ -4936,8 +4936,10 @@ static void impl_free(struct impl *impl)
 	struct client *c;
 	struct message *msg;
 
+#if HAVE_DBUS
 	if (impl->dbus_name)
 		dbus_release_name(impl->dbus_name);
+#endif
 
 	spa_list_consume(msg, &impl->free_messages, link)
 		message_free(impl, msg, true, true);
@@ -5111,7 +5113,9 @@ struct pw_protocol_pulse *pw_protocol_pulse_new(struct pw_context *context,
 	pw_context_add_listener(context, &impl->context_listener,
 			&context_events, impl);
 
+#if HAVE_DBUS
 	impl->dbus_name = dbus_request_name(context, "org.pulseaudio.Server");
+#endif
 
 	return (struct pw_protocol_pulse *) impl;
 

src/tools/meson.build

@@ -67,8 +67,10 @@ elif not sndfile_dep.found() and get_option('pw-cat').enabled()
 endif
 summary({'Build pw-cat tool': build_pw_cat}, bool_yn: true, section: 'pw-cat/pw-play/pw-dump tool')
 
-executable('pw-reserve',
-  'pw-reserve.c',
-  install: true,
-  dependencies : [dbus_dep, pipewire_dep],
-)
+if dbus_dep.found()
+  executable('pw-reserve',
+    'pw-reserve.c',
+    install: true,
+    dependencies : [dbus_dep, pipewire_dep],
+  )
+endif

test/meson.build

@@ -74,8 +74,6 @@ test('test context',
                'test-config.c',
                include_directories: pwtest_inc,
                link_with: [pwtest_lib,
-                            spa_support_lib,
-                            spa_dbus_lib,
                             pipewire_module_protocol_native,
                             pipewire_module_client_node,
                             pipewire_module_client_device,

test/test-context.c

@@ -227,7 +227,9 @@ PWTEST(context_support)
 		SPA_TYPE_INTERFACE_Loop,
 		SPA_TYPE_INTERFACE_LoopUtils,
 		SPA_TYPE_INTERFACE_Log,
+#if HAVE_DBUS
 		SPA_TYPE_INTERFACE_DBus,
+#endif
 		SPA_TYPE_INTERFACE_CPU
 	};