Implemented live development server

src/cpl_cli/command/start_service.py

@@ -0,0 +1,68 @@
+import os
+import signal
+import subprocess
+import time
+
+import psutil as psutil
+from watchdog.events import FileSystemEventHandler
+from watchdog.observers import Observer
+
+from cpl.application import ApplicationRuntimeABC
+from cpl.console.console import Console
+from cpl_cli.command_abc import CommandABC
+from cpl_cli.configuration import BuildSettings
+from cpl_cli.live_server.live_server import LiveServerThread
+
+
+class StartService(CommandABC, FileSystemEventHandler):
+
+    def __init__(self, runtime: ApplicationRuntimeABC, build_settings: BuildSettings):
+        CommandABC.__init__(self)
+        FileSystemEventHandler.__init__(self)
+
+        self._runtime = runtime
+        self._build_settings = build_settings
+
+        self._src_dir = os.path.join(self._runtime.working_directory, self._build_settings.source_path)
+        self._live_server = LiveServerThread(self._src_dir)
+        self._observer = None
+
+    def _start_observer(self):
+        self._observer = Observer()
+        self._observer.schedule(self, path=self._src_dir, recursive=True)
+        self._observer.start()
+
+    def _restart(self):
+        for proc in psutil.process_iter():
+            try:
+                if proc.cmdline() == self._live_server.command:
+                    os.system(f'pkill -f {self._live_server.main}')
+            except Exception as e:
+                pass
+
+        Console.write_line('Restart\n')
+
+        while self._live_server.is_alive():
+            time.sleep(1)
+
+        self._live_server = LiveServerThread(self._src_dir)
+        self._live_server.start()
+
+        self._start_observer()
+
+    def on_modified(self, event):
+        if event.is_directory:
+            return None
+
+        # Event is modified, you can process it now
+        if str(event.src_path).endswith('.py'):
+            self._observer.stop()
+            self._restart()
+
+    def run(self, args: list[str]):
+        Console.write_line('** CPL live development server is running **')
+        self._start_observer()
+        self._live_server.start()
+
+        Console.close()
+        Console.write('\n')