initial commit

src/app.py

@@ -0,0 +1,72 @@
+# Python imports
+from contextlib import suppress
+import signal
+import os
+
+# Lib imports
+
+# Application imports
+from libs.debugging import debug_signal_handler
+from libs.ipc_server import IPCServer
+from core.window import Window
+
+
+
+class AppLaunchException(Exception):
+    ...
+
+
+
+class Application:
+    """ docstring for Application. """
+
+    def __init__(self):
+        super(Application, self).__init__()
+
+        self.setup_debug_hook()
+
+
+    def run(self):
+        if not settings_manager.is_trace_debug():
+            if not self.load_ipc():
+                return
+
+        win = Window()
+        win.start()
+
+    def load_ipc(self):
+        args, \
+        unknownargs = settings_manager.get_starting_args()
+        ipc_server  = IPCServer()
+
+        self.ipc_realization_check(ipc_server)
+        if ipc_server.is_ipc_alive:
+            return True
+
+        logger.warning(f"{app_name} IPC Server Exists: Have sent path(s) to it and closing...")
+        for arg in unknownargs + [args.new_tab,]:
+            if os.path.isfile(arg):
+                message = f"FILE|{arg}"
+                ipc_server.send_ipc_message(message)
+
+            if os.path.isdir(arg):
+                message = f"DIR|{arg}"
+                ipc_server.send_ipc_message(message)
+
+        return False
+
+    def ipc_realization_check(self, ipc_server):
+        try:
+            ipc_server.create_ipc_listener()
+        except Exception:
+            ipc_server.send_test_ipc_message()
+
+    def setup_debug_hook(self):
+        # Typically: ValueError: signal only works in main thread
+        with suppress(ValueError):
+            # kill -SIGUSR2 <pid> from Linux/Unix or SIGBREAK signal from Windows
+            signal.signal(
+                vars(signal).get("SIGBREAK") or vars(signal).get("SIGUSR2"),
+                debug_signal_handler
+            )
+