Added libs

app/start.py

@@ -0,0 +1,142 @@
+import os
+import sys
+import logging
+from logging.handlers import RotatingFileHandler
+import shutil
+import pathlib
+import urllib.request
+import subprocess
+import zipfile
+import venv
+from pathlib import Path
+
+# ==============================
+# Configuration constants
+# ==============================
+ROOT_DIR = Path(__file__).parent.resolve()
+LIBS_DIR = ROOT_DIR / "libs"
+LOGS_DIR = ROOT_DIR / "logs"
+APP_MAIN = LIBS_DIR / "app" / "main.py"
+APP_ZIP = LIBS_DIR / "app.zip"
+DEFAULT_REPOSITORY = "https://n0sys.duckdns.org/downloads/libs"
+ARGS_LIST = ["updateApp=False", "updateLibs=True", "repack=True"]
+
+# ==============================
+# Logger setup
+# ==============================
+def setup_logger() -> logging.Logger:
+    """Configure application logger with console and rotating file handlers."""
+    logger = logging.getLogger("start")
+    logger.setLevel(logging.DEBUG)
+
+    LOGS_DIR.mkdir(parents=True, exist_ok=True)
+
+    # Log format
+    formatter = logging.Formatter(
+        fmt="%(asctime)s | %(levelname)-8s | %(message)s",
+        datefmt="%Y-%m-%d %H:%M:%S"
+    )
+
+    # Console handler
+    console_handler = logging.StreamHandler()
+    console_handler.setLevel(logging.INFO)
+    console_handler.setFormatter(formatter)
+    logger.addHandler(console_handler)
+
+    # File handler
+    file_handler = RotatingFileHandler(LOGS_DIR / "start.log", maxBytes=5_000_000, backupCount=3, encoding="utf-8")
+    file_handler.setLevel(logging.DEBUG)
+    file_handler.setFormatter(formatter)
+    logger.addHandler(file_handler)
+
+    return logger
+
+logger = setup_logger()
+
+# ==============================
+# Functions
+# ==============================
+def start_app():
+    """Entry point for the launcher"""
+    logger.info("--------- START ---------")
+    logger.debug(f"Root path: {ROOT_DIR}")
+
+    LIBS_DIR.mkdir(parents=True, exist_ok=True)
+
+    # TODO: remove in production
+    # update_libs()
+
+    create_venv()
+    ensure_app()
+
+    # Import after app is available
+    from libs.app.common.process import new_python_process
+    from libs.app.common.args import read_kargs, kargs_to_array
+
+    args = kargs_to_array()
+    pid = new_python_process(APP_MAIN, str(get_venv_python()), args=args, wait=True, new_console=True)
+    logger.info(f"Main process running. PID {pid} - Args: {args}")
+    logger.info("--------- END ---------")
+
+
+def get_venv_python():
+    """Return the path to the venv's Python executable in a cross-platform way"""
+    if os.name == "nt":
+        return ROOT_DIR / ".venv" / "Scripts" / "python.exe"
+    else:
+        return ROOT_DIR / ".venv" / "bin" / "python"
+
+def update_libs():
+    """Development only: repack local libs"""
+    if ("updateApp=True" in ARGS_LIST or "updateLibs=True" in ARGS_LIST) and "repack=True" in ARGS_LIST:
+        update_version_script = r"C:\Workspace\utils\updateLibsVersion.py"
+        try:
+            subprocess.run(
+                [str(get_venv_python()), update_version_script],
+                cwd=ROOT_DIR,
+                creationflags=subprocess.CREATE_NEW_CONSOLE,
+                check=True,
+            )
+        except subprocess.CalledProcessError as e:
+            logger.error(f"Error running update libs: {e}")
+
+def ensure_app():
+    """Download, extract and install requirements of the application if not already present"""
+    if APP_MAIN.exists():
+        logger.debug("App already present, skipping download.")
+        return
+    
+    url = f"{DEFAULT_REPOSITORY}/app/app.zip"
+    logger.info(f"Downloading app from {url} ...")
+    try:
+        urllib.request.urlretrieve(url, APP_ZIP)
+    except Exception as e:
+        logger.exception(f"Failed to download app")
+        raise
+
+    logger.info(f"Extracting {APP_ZIP}...")
+    with zipfile.ZipFile(APP_ZIP, 'r') as zip_ref:
+        zip_ref.extractall(LIBS_DIR)
+
+    logger.info(f"Installing app requirements ...")
+    python_exec = str(get_venv_python())
+    requirements_path = os.path.join(ROOT_DIR, "libs/app/requirements.txt")
+    subprocess.check_call([python_exec, "-m", "pip", "install", "-r", requirements_path])
+
+
+def create_venv():
+    """Ensure a local virtual environment exists."""
+    venv_dir = os.path.join(ROOT_DIR, ".venv")
+    if not os.path.exists(venv_dir):
+        logger.debug(f"Creating python venv: {venv_dir}")
+        venv.create(venv_dir, with_pip=True)
+
+# ==============================
+# Main
+# ==============================
+if __name__ == "__main__":
+    try:
+        start_app()
+    except Exception:
+        logger.exception("Error starting application")
+        sys.exit(1)