Frontend-GNOME: implement --execute-command argument

This new argument can be used to execute commands of either a new Smuxi
instance or an already running instance. The execute command behaves
exactly the same way as the input entry.

This is useful for remote automation, e.g.:

	ssh my-box-with-running-smuxi "smuxi-frontend-gnome '/say hello from the command line'"

src/Frontend-GNOME/Main.cs

@@ -1,7 +1,7 @@
 /*
  * Smuxi - Smart MUltipleXed Irc
  *
- * Copyright (c) 2005-2008, 2012-2013, 2015 Mirco Bauer <[email protected]>
+ * Copyright (c) 2005-2008, 2012-2013, 2015, 2023 Mirco Bauer <[email protected]>
  *
  * Full GPL License: <http://www.gnu.org/licenses/gpl.txt>
  *
@@ -41,6 +41,7 @@ public static void Main(string[] args)
         {
             var debug = false;
             var link = String.Empty;
+            var command = String.Empty;
             var engine = String.Empty;
             var newInstance = false;
             var options = new OptionSet();
@@ -76,6 +77,13 @@ public static void Main(string[] args)
                     link = v;
                 }
             );
+            options.Add(
+                "execute|execute-command=",
+                _("Executes the specified command in Smuxi"),
+                v => {
+                    command = v;
+                }
+            );
             options.Add(
                 "new-instance",
                 _("Starts a new Smuxi instance and ignores an existing one"),
@@ -103,6 +111,8 @@ public static void Main(string[] args)
                         Instance.FirstInstance = new CommandLineInterface();
                         if (!String.IsNullOrEmpty(link)) {
                             Instance.FirstInstance.OpenLink(link);
+                        } else if (!String.IsNullOrEmpty(command)) {
+                            Instance.FirstInstance.ExecuteCommand(command);
                         }
                     } else {
                         if (!String.IsNullOrEmpty(link)) {
@@ -113,6 +123,14 @@ public static void Main(string[] args)
                             Console.WriteLine(msg);
 #endif
                             Instance.FirstInstance.OpenLink(link);
+                        } else if (!String.IsNullOrEmpty(command)) {
+                            var msg = _("Passing command to already running Smuxi instance...");
+#if LOG4NET
+                            _Logger.Info(msg);
+#else
+                            Console.WriteLine(msg);
+#endif
+                            Instance.FirstInstance.ExecuteCommand(command);
                         } else if (!newInstance) {
                             var msg = _("Bringing already running Smuxi instance to foreground...");
 #if LOG4NET
@@ -209,6 +227,22 @@ public void OpenLink(string link)
             }
         }
 
+        public void ExecuteCommand(string cmd)
+        {
+            if (Frontend.Session == null) {
+#if LOG4NET
+                Logger.Warn($"Can't execute '{cmd}' as session isn't ready, ignoring...");
+#endif
+                return;
+            }
+            Gtk.Application.Invoke((o, e) => {
+#if LOG4NET
+                Logger.Info($"Executing '{cmd}'...");
+#endif
+                Frontend.MainWindow.Entry.ExecuteCommand(cmd);
+            });
+        }
+
         public override object InitializeLifetimeService()
         {
             // live forever

src/Frontend-GNOME/smuxi-frontend-gnome.1

@@ -10,6 +10,7 @@
 .Op Fl e Ar engine
 .Op Fl \-new-instance
 .Op Fl \-open Ar uri
+.Op Fl \-execute-command Ar command
 .Sh DESCRIPTION
 .Nm
 is a GNOME frontend for the Smuxi chat client, powered by the GTK# library. It can operate standalone or attached to a remote Smuxi engine.
@@ -29,6 +30,9 @@ Starts a new Smuxi instance and ignores any existing sessions.a
 .It Fl \-open Ar uri , Fl \-open-link Ar uri
 Opens a URL to an IRC channel, in the following form:
 .Ql irc://irc.example.com/examplechannel
+.It Fl \-execute Ar command , Fl \-execute-command Ar command
+Executes the specified command in Smuxi. For example:
+ --execute-command '/say hi all from the command line'
 .El
 .Sh FILES
 .Bl -tag -width -compact