Allow ignoring failures when mapping remote control commands

docs/remote-control.rst

@@ -276,6 +276,12 @@ Then pressing the :kbd:`F1` key will set the active window margins to
 :code:`30`. The syntax for what follows :ac:`remote_control` is exactly the same
 as the syntax for what follows :code:`kitty @` above.
 
+If you wish to ignore errors from the command, prefix the command with an
+``!``. For example, the following will not return an error when no windows
+are matched::
+
+    map f1 !focus-window --match XXXXXX
+
 .. note:: You do not need :opt:`allow_remote_control` to use these mappings,
    as they are not actual remote programs, but are simply a way to resuse the
    remote control infrastructure via keybings.

kitty/boss.py

@@ -578,8 +578,13 @@ class Boss:
             PayloadGetter, command_for_name, parse_subcommand_cli
         )
         from .remote_control import parse_rc_args
+        aa = list(args)
+        silent = False
+        if aa and aa[0].startswith('!'):
+            aa[0] = aa[0][1:]
+            silent = True
         try:
-            global_opts, items = parse_rc_args(['@'] + list(args))
+            global_opts, items = parse_rc_args(['@'] + aa)
             if not items:
                 return None
             cmd = items[0]
@@ -589,11 +594,17 @@ class Boss:
         except SystemExit as e:
             raise Exception(str(e)) from e
         import types
-        if isinstance(payload, types.GeneratorType):
-            for x in payload:
-                c.response_from_kitty(self, active_window, PayloadGetter(c, x if isinstance(x, dict) else {}))
-            return None
-        return c.response_from_kitty(self, active_window, PayloadGetter(c, payload if isinstance(payload, dict) else {}))
+        try:
+            if isinstance(payload, types.GeneratorType):
+                for x in payload:
+                    c.response_from_kitty(self, active_window, PayloadGetter(c, x if isinstance(x, dict) else {}))
+                return None
+            return c.response_from_kitty(self, active_window, PayloadGetter(c, payload if isinstance(payload, dict) else {}))
+        except Exception as e:
+            if silent:
+                log_error(f'Failed to run remote_control mapping: {aa} with error: {e}')
+                return None
+            raise
 
     def peer_message_received(self, msg_bytes: bytes, peer_id: int) -> Union[bytes, bool, None]:
         cmd_prefix = b'\x1bP@kitty-cmd'