Add a mappable action to cleanup shared SSH connections

kitty/boss.py

@@ -16,9 +16,7 @@ from typing import (
 )
 from weakref import WeakValueDictionary
 
-from .child import (
-    cached_process_data, default_env, set_default_env
-)
+from .child import cached_process_data, default_env, set_default_env
 from .cli import create_opts, parse_args
 from .cli_stub import CLIOptions
 from .conf.utils import BadLine, KeyAction, to_cmdline
@@ -58,10 +56,11 @@ from .tabs import (
 from .types import _T, AsyncResponse, SingleKey, WindowSystemMouseEvent, ac
 from .typing import PopenType, TypedDict
 from .utils import (
-    func_name, get_editor, get_new_os_window_size, get_primary_selection,
-    is_path_in_temp_dir, log_error, open_url, parse_address_spec,
-    parse_uri_list, platform_window_id, remove_socket_file, safe_print,
-    set_primary_selection, single_instance, startup_notification_handler, which
+    cleanup_ssh_control_masters, func_name, get_editor, get_new_os_window_size,
+    get_primary_selection, is_path_in_temp_dir, log_error, open_url,
+    parse_address_spec, parse_uri_list, platform_window_id, remove_socket_file,
+    safe_print, set_primary_selection, single_instance,
+    startup_notification_handler, which
 )
 from .window import CommandOutput, MatchPatternType, Window
 
@@ -2263,6 +2262,10 @@ class Boss:
             output = '\n'.join(f'{k}={v}' for k, v in os.environ.items())
             self.display_scrollback(w, output, title=_('Current kitty env vars'), report_cursor=False)
 
+    @ac('debug', 'Close all shared SSH connections')
+    def close_shared_ssh_connections(self) -> None:
+        cleanup_ssh_control_masters()
+
     def launch_urls(self, *urls: str, no_replace_window: bool = False) -> None:
         from .launch import force_window_launch
         from .open_actions import actions_for_launch

kitty/main.py

@@ -17,8 +17,7 @@ from .conf.utils import BadLine
 from .config import cached_values_for
 from .constants import (
     appname, beam_cursor_data_file, config_dir, glfw_path, is_macos,
-    is_wayland, kitty_exe, logo_png_file, running_in_kitty, runtime_dir,
-    ssh_control_master_template
+    is_wayland, kitty_exe, logo_png_file, running_in_kitty
 )
 from .fast_data_types import (
     GLFW_IBEAM_CURSOR, GLFW_MOD_ALT, GLFW_MOD_SHIFT, create_os_window,
@@ -33,8 +32,8 @@ from .os_window_size import initial_window_size_func
 from .session import get_os_window_sizing_data
 from .types import SingleKey
 from .utils import (
-    detach, expandvars, log_error, single_instance,
-    startup_notification_handler, unix_socket_paths
+    cleanup_ssh_control_masters, detach, expandvars, log_error,
+    single_instance, startup_notification_handler, unix_socket_paths
 )
 from .window import load_shader_programs
 
@@ -346,24 +345,6 @@ def set_locale() -> None:
             log_error('Failed to set locale with no LANG')
 
 
-def cleanup_ssh_control_masters() -> None:
-    import glob
-    import subprocess
-    try:
-        files = frozenset(glob.glob(os.path.join(runtime_dir(), ssh_control_master_template.format(
-            kitty_pid=os.getpid(), ssh_placeholder='*'))))
-    except OSError:
-        return
-    workers = tuple(subprocess.Popen([
-        'ssh', '-o', f'ControlPath={x}', '-O', 'exit', 'kitty-unused-host-name'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
-                    for x in files)
-    for w in workers:
-        w.wait()
-    for x in files:
-        with suppress(OSError):
-            os.remove(x)
-
-
 def _main() -> None:
     running_in_kitty(True)
     with suppress(AttributeError):  # python compiled without threading

kitty/utils.py

@@ -18,7 +18,8 @@ from typing import (
 )
 
 from .constants import (
-    appname, config_dir, is_macos, is_wayland, read_kitty_resource, shell_path,
+    appname, config_dir, is_macos, is_wayland, read_kitty_resource,
+    runtime_dir, shell_path, ssh_control_master_template,
     supports_primary_selection
 )
 from .fast_data_types import Color, open_tty
@@ -917,3 +918,21 @@ def hold_till_enter() -> None:
                 break
             if q in b'\x03\x04':
                 write_all(fd, msg)
+
+
+def cleanup_ssh_control_masters() -> None:
+    import glob
+    import subprocess
+    try:
+        files = frozenset(glob.glob(os.path.join(runtime_dir(), ssh_control_master_template.format(
+            kitty_pid=os.getpid(), ssh_placeholder='*'))))
+    except OSError:
+        return
+    workers = tuple(subprocess.Popen([
+        'ssh', '-o', f'ControlPath={x}', '-O', 'exit', 'kitty-unused-host-name'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+                    for x in files)
+    for w in workers:
+        w.wait()
+    for x in files:
+        with suppress(OSError):
+            os.remove(x)