Support MPD_HOST/_PORT environment variables

src/plattenalbum.py

@@ -637,13 +637,19 @@ def update(self):
 		self.emitter.emit("updating-db")
 		return job_id
 
-	def try_connect(self, remote):
+	def try_connect(self):
 		self.emitter.emit("connecting")
 		def callback():
+			if (host:=os.environ.get('MPD_HOST')):
+				port=int(os.environ.get('MPD_PORT', '6600'))
+			elif (host:=self._settings.get_string("host")):
+				port=self._settings.get_int("port")
+
 			# connect
-			if remote:
+			if host:
 				try:
-					self.connect(self._settings.get_string("host"), self._settings.get_int("port"))
+					self.connect(host, port)
+					self._music_directory=None
 				except:
 					self.emitter.emit("connection_error")
 					self._start_idle_id=None
@@ -658,6 +664,7 @@ def callback():
 						self.emitter.emit("connection_error")
 						self._start_idle_id=None
 						return False
+				self._music_directory=self.config()
 			# set password
 			if password:=self._settings.get_string("password"):
 				try:
@@ -669,10 +676,6 @@ def callback():
 					return False
 			# connected
 			commands=self.commands()
-			if remote:
-				self._music_directory=None
-			elif "config" in commands:
-				self._music_directory=self.config()
 			if "outputs" in commands and "enableoutput" in commands:
 				if len(self.outputs()) == 1:
 					self.enableoutput(0)
@@ -683,7 +686,6 @@ def callback():
 				self.disconnect()
 				self.emitter.emit("connection_error")
 			# connect successful
-			self._settings.set_boolean("remote-connection", remote)
 			self._start_idle_id=None
 			return False
 		self._start_idle_id=GLib.idle_add(callback)
@@ -2803,7 +2805,7 @@ def _on_disconnect(self, action, param):
 		self._client.disconnect()
 
 	def _on_connect(self, action, param):
-		self._client.try_connect(param.get_boolean())
+		self._client.try_connect()
 
 	def _on_state(self, emitter, state):
 		state_dict={"play": True, "pause": True, "stop": False}
@@ -2958,7 +2960,7 @@ def open(self):
 		while main.pending():
 			main.iteration()
 		self._settings.bind("maximize", self, "maximized", Gio.SettingsBindFlags.SET)
-		self._client.try_connect(self._settings.get_boolean("remote-connection"))
+		self._client.try_connect()
 
 	def _clear_title(self):
 		self.set_title("Plattenalbum")