add option to leave daemon running after GUI is closed

electrum/commands.py

@@ -853,6 +853,7 @@ def get_parser():
     parser_gui.add_argument("-o", "--offline", action="store_true", dest="offline", default=False, help="Run offline")
     parser_gui.add_argument("-m", action="store_true", dest="hide_gui", default=False, help="hide GUI on startup")
     parser_gui.add_argument("-L", "--lang", dest="language", default=None, help="default language used in GUI")
+    parser_gui.add_argument("--daemon", action="store_true", dest="daemon", default=False, help="keep daemon running after GUI is closed")
     add_network_options(parser_gui)
     add_global_options(parser_gui)
     # daemon

electrum/daemon.py

@@ -120,7 +120,7 @@ def get_rpc_credentials(config):
 
 class Daemon(DaemonThread):
 
-    def __init__(self, config, fd, is_gui):
+    def __init__(self, config, fd):
         DaemonThread.__init__(self)
         self.config = config
         if config.get('offline'):
@@ -133,12 +133,11 @@ class Daemon(DaemonThread):
         self.gui = None
         self.wallets = {}
         # Setup JSONRPC server
-        self.init_server(config, fd, is_gui)
+        self.init_server(config, fd)
 
-    def init_server(self, config, fd, is_gui):
+    def init_server(self, config, fd):
         host = config.get('rpchost', '127.0.0.1')
         port = config.get('rpcport', 0)
-
         rpc_user, rpc_password = get_rpc_credentials(config)
         try:
             server = VerifyingJSONRPCServer((host, port), logRequests=False,
@@ -153,9 +152,7 @@ class Daemon(DaemonThread):
         self.server = server
         server.timeout = 0.1
         server.register_function(self.ping, 'ping')
-        if is_gui:
         server.register_function(self.run_gui, 'gui')
-        else:
         server.register_function(self.run_daemon, 'daemon')
         self.cmd_runner = Commands(self.config, None, self.network)
         for cmdname in known_commands:
@@ -215,13 +212,12 @@ class Daemon(DaemonThread):
     def run_gui(self, config_options):
         config = SimpleConfig(config_options)
         if self.gui:
-            #if hasattr(self.gui, 'new_window'):
+            if hasattr(self.gui, 'new_window'):
-            #    path = config.get_wallet_path()
+                path = config.get_wallet_path()
-            #    self.gui.new_window(path, config.get('url'))
+                self.gui.new_window(path, config.get('url'))
-            #    response = "ok"
+                response = "ok"
-            #else:
+            else:
-            #    response = "error: current GUI does not support multiple windows"
+                response = "error: current GUI does not support multiple windows"
-            response = "error: Electrum GUI already running"
         else:
             response = "Error: Electrum is running in daemon mode. Please stop the daemon first."
         return response
@@ -299,6 +295,8 @@ class Daemon(DaemonThread):
         self.on_stop()
 
     def stop(self):
+        if self.gui:
+            self.gui.stop()
         self.print_error("stopping, removing lockfile")
         remove_lockfile(get_lockfile(self.config))
         DaemonThread.stop(self)

electrum/gui/qt/__init__.py

@@ -45,7 +45,7 @@ from electrum.base_wizard import GoBack
 # from electrum.synchronizer import Synchronizer
 # from electrum.verifier import SPV
 # from electrum.util import DebugMem
-from electrum.util import (UserCancelled, print_error,
+from electrum.util import (UserCancelled, PrintError,
                            WalletFileException, BitcoinException)
 # from electrum.wallet import Abstract_Wallet
 
@@ -86,7 +86,7 @@ class QNetworkUpdatedSignalObject(QObject):
     network_updated_signal = pyqtSignal(str, object)
 
 
-class ElectrumGui:
+class ElectrumGui(PrintError):
 
     def __init__(self, config, daemon, plugins):
         set_language(config.get('language'))
@@ -128,7 +128,7 @@ class ElectrumGui:
                 self.app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
             except BaseException as e:
                 use_dark_theme = False
-                print_error('Error setting dark theme: {}'.format(e))
+                self.print_error('Error setting dark theme: {}'.format(e))
         # Even if we ourselves don't set the dark theme,
         # the OS/window manager/etc might set *a dark theme*.
         # Hence, try to choose colors accordingly:
@@ -222,7 +222,7 @@ class ElectrumGui:
             except UserCancelled:
                 pass
             except GoBack as e:
-                print_error('[start_new_window] Exception caught (GoBack)', e)
+                self.print_error('[start_new_window] Exception caught (GoBack)', e)
             except (WalletFileException, BitcoinException) as e:
                 traceback.print_exc(file=sys.stderr)
                 d = QMessageBox(QMessageBox.Warning, _('Error'),
@@ -267,6 +267,7 @@ class ElectrumGui:
         if not self.windows:
             self.config.save_last_wallet(window.wallet)
         run_hook('on_close_window', window)
+        self.daemon.stop_wallet(window.wallet.storage.path)
 
     def init_network(self):
         # Show network dialog if config does not exist
@@ -309,6 +310,14 @@ class ElectrumGui:
             self.tray.hide()
         self.app.aboutToQuit.connect(clean_up)
 
+        # keep daemon running after close
+        if self.config.get('daemon'):
+            self.app.setQuitOnLastWindowClosed(False)
+
         # main loop
         self.app.exec_()
         # on some platforms the exec_ call may not return, so use clean_up()
+
+    def stop(self):
+        self.print_error('closing GUI')
+        self.app.quit()

run_electrum

@@ -415,7 +415,7 @@ if __name__ == '__main__':
         fd, server = daemon.get_fd_or_server(config)
         if fd is not None:
             plugins = init_plugins(config, config.get('gui', 'qt'))
-            d = daemon.Daemon(config, fd, True)
+            d = daemon.Daemon(config, fd)
             d.start()
             d.init_gui(config, plugins)
             sys.exit(0)
@@ -436,7 +436,7 @@ if __name__ == '__main__':
                         print_stderr("starting daemon (PID %d)" % pid)
                         sys.exit(0)
                 init_plugins(config, 'cmdline')
-                d = daemon.Daemon(config, fd, False)
+                d = daemon.Daemon(config, fd)
                 d.start()
                 if config.get('websocket_server'):
                     from electrum import websockets