Add handling to detect abrupt parent Python process termination for h…

…otkeys process

ahk/_constants.py

@@ -2806,6 +2806,7 @@
 
 HOTKEYS_SCRIPT_TEMPLATE = r"""#Requires AutoHotkey v1.1.17+
 #Persistent
+#Warn
 {% for directive in directives %}
 {% if directive.apply_to_hotkeys_process %}
 
@@ -2817,6 +2818,7 @@
 OnClipboardChange("ClipChanged")
 {% endif %}
 KEEPALIVE := Chr(57344)
+stdin  := FileOpen("*", "r `n", "UTF-8")
 SetTimer, keepalive, 1000
 
 Crypt32 := DllCall("LoadLibrary", "Str", "Crypt32.dll", "Ptr")
@@ -2902,8 +2904,14 @@
 
 
 keepalive:
-global KEEPALIVE
-FileAppend, %KEEPALIVE%`n, *, UTF-8
+    global KEEPALIVE
+    global stdin
+    FileAppend, %KEEPALIVE%`n, *, UTF-8
+    alivesignal := RTrim(stdin.ReadLine(), "`n")
+    if (alivesignal = "") {
+        ExitApp
+    }
+    return
 
 """
 
@@ -5805,9 +5813,9 @@
 
 
 KEEPALIVE := Chr(57344)
-;SetTimer, keepalive, 1000
 
 stdout := FileOpen("*", "w", "UTF-8")
+stdin  := FileOpen("*", "r `n", "UTF-8")
 
 WriteStdout(s) {
     global stdout
@@ -5902,10 +5910,17 @@
 OnClipboardChange(ClipChanged)
 
 {% endif %}
-
-
-;keepalive:
-;global KEEPALIVE
-;FileAppend, %KEEPALIVE%`n, *, UTF-8
+SetTimer KeepAliveFunc, 1000
+
+KeepAliveFunc() {
+    global stdin
+    global KEEPALIVE
+    WriteStdout(Format("{}`n", KEEPALIVE))
+    alivesignal := RTrim(stdin.ReadLine(), "`n")
+    if (alivesignal = "") {
+        ExitApp
+    }
+    return
+}
 
 """

ahk/_hotkey.py

@@ -336,11 +336,14 @@ def listener(self) -> None:
                 stderr=subprocess.STDOUT,
             )
             atexit.register(kill, self._proc)
+            assert self._proc.stdout is not None
+            assert self._proc.stdin is not None
             while self._running:
-                assert self._proc.stdout is not None
                 line = self._proc.stdout.readline()
                 if line.rstrip(b'\n') == _KEEPALIVE_SENTINEL:
                     logging.debug('keepalive received')
+                    self._proc.stdin.write(b'alive\n')
+                    self._proc.stdin.flush()
                     continue
                 if not line.strip():
                     logging.debug('Listener: Process probably died, exiting')

ahk/templates/hotkeys-v2.ahk

@@ -8,9 +8,9 @@
 
 
 KEEPALIVE := Chr(57344)
-;SetTimer, keepalive, 1000
 
 stdout := FileOpen("*", "w", "UTF-8")
+stdin  := FileOpen("*", "r `n", "UTF-8")
 
 WriteStdout(s) {
     global stdout
@@ -105,8 +105,15 @@ ClipChanged(Type) {
 OnClipboardChange(ClipChanged)
 
 {% endif %}
-
-
-;keepalive:
-;global KEEPALIVE
-;FileAppend, %KEEPALIVE%`n, *, UTF-8
+SetTimer KeepAliveFunc, 1000
+
+KeepAliveFunc() {
+    global stdin
+    global KEEPALIVE
+    WriteStdout(Format("{}`n", KEEPALIVE))
+    alivesignal := RTrim(stdin.ReadLine(), "`n")
+    if (alivesignal = "") {
+        ExitApp
+    }
+    return
+}

ahk/templates/hotkeys.ahk

@@ -1,5 +1,6 @@
 #Requires AutoHotkey v1.1.17+
 #Persistent
+#Warn
 {% for directive in directives %}
 {% if directive.apply_to_hotkeys_process %}
 
@@ -11,6 +12,7 @@
 OnClipboardChange("ClipChanged")
 {% endif %}
 KEEPALIVE := Chr(57344)
+stdin  := FileOpen("*", "r `n", "UTF-8")
 SetTimer, keepalive, 1000
 
 Crypt32 := DllCall("LoadLibrary", "Str", "Crypt32.dll", "Ptr")
@@ -96,5 +98,11 @@ ClipChanged(Type) {
 
 
 keepalive:
-global KEEPALIVE
-FileAppend, %KEEPALIVE%`n, *, UTF-8
+    global KEEPALIVE
+    global stdin
+    FileAppend, %KEEPALIVE%`n, *, UTF-8
+    alivesignal := RTrim(stdin.ReadLine(), "`n")
+    if (alivesignal = "") {
+        ExitApp
+    }
+    return