systemd: add systemwide pipewire-pulse files

We can and it works, so why not.

src/daemon/systemd/system/meson.build

@@ -3,13 +3,19 @@ if get_option('systemd-system-unit-dir') != ''
   systemd_system_services_dir = get_option('systemd-system-unit-dir')
 endif
 
-install_data(sources : ['pipewire.socket', 'pipewire-manager.socket'],
+install_data(sources : ['pipewire.socket', 'pipewire-manager.socket', 'pipewire-pulse.socket' ],
              install_dir : systemd_system_services_dir)
 
 systemd_config = configuration_data()
 systemd_config.set('PW_BINARY', pipewire_bindir / 'pipewire')
+systemd_config.set('PW_PULSE_BINARY', pipewire_bindir / 'pipewire-pulse')
 
 configure_file(input : 'pipewire.service.in',
                output : 'pipewire.service',
                configuration : systemd_config,
                install_dir : systemd_system_services_dir)
+
+configure_file(input : 'pipewire-pulse.service.in',
+               output : 'pipewire-pulse.service',
+               configuration : systemd_config,
+               install_dir : systemd_system_services_dir)

src/daemon/systemd/system/pipewire-pulse.service.in

@@ -0,0 +1,24 @@
+[Unit]
+Description=PipeWire PulseAudio Service
+Requires=pipewire-pulse.socket
+Wants=pipewire.service pipewire-session-manager.service
+After=pipewire.service pipewire-session-manager.service
+
+[Service]
+LockPersonality=yes
+MemoryDenyWriteExecute=yes
+NoNewPrivileges=yes
+SystemCallArchitectures=native
+SystemCallFilter=@system-service
+Type=simple
+AmbientCapabilities=CAP_SYS_NICE
+ExecStart=@PW_PULSE_BINARY@
+Restart=on-failure
+User=pipewire
+Environment=PIPEWIRE_RUNTIME_DIR=%t/pipewire
+Environment=PULSE_RUNTIME_PATH=%t/pulse
+
+[Install]
+Also=pipewire-pulse.socket
+WantedBy=pipewire.service
+

src/daemon/systemd/system/pipewire-pulse.socket

@@ -0,0 +1,12 @@
+[Unit]
+Description=PipeWire PulseAudio System Socket
+
+[Socket]
+Priority=6
+ListenStream=%t/pulse/native
+SocketUser=pipewire
+SocketGroup=pipewire
+SocketMode=0660
+
+[Install]
+WantedBy=sockets.target