Installer divided into several modules and added new MessageDialog module

ensure_modules.py

@@ -0,0 +1,68 @@
+import sys
+import os
+
+# ✅ Path to be added in the .pth file
+SHARED_LIBS_PATH = "/usr/local/share/shared_libs"
+PTH_FILE_NAME = "shared_libs.pth"
+
+
+def ensure_shared_libs_pth_exists():
+    """
+    Checks if all site-packages directories have a `.pth` file with the correct path.
+    Creates or updates it if missing or incorrect.
+    """
+    # Search for all site-packages directories (e.g., /usr/lib/python3.x/site-packages/)
+    for root, dirs, files in os.walk("/usr"):
+        if "site-packages" in dirs:
+            site_packages_dir = os.path.join(root, "site-packages")
+
+            pth_file_path = os.path.join(site_packages_dir, PTH_FILE_NAME)
+
+            # Check if the file exists and is correct
+            if not os.path.exists(pth_file_path):
+                print(f"⚠️ .pth file not found: {pth_file_path}. Creating...")
+                with open(pth_file_path, "w") as f:
+                    f.write(SHARED_LIBS_PATH + "\n")
+
+            else:
+                # Check if the correct path is in the file
+                with open(pth_file_path, "r") as f:
+                    content = f.read().strip()
+
+                if not content == SHARED_LIBS_PATH:
+                    print(f"⚠️ .pth file exists but has incorrect content. Fixing...")
+                    with open(pth_file_path, "w") as f:
+                        f.write(SHARED_LIBS_PATH + "\n")
+
+    print("✅ All .pth files checked and corrected.")
+
+
+def main():
+    try:
+        # Try to import the module
+        from shared_libs.wp_app_config import AppConfig
+
+        print("✅ 'shared_libs' is correctly loaded. Starting the application...")
+
+        # Your main program logic here...
+    except ModuleNotFoundError as e:
+        # Only handle errors related to missing .pth file
+        if "No module named 'shared_libs'" in str(e):
+            print("⚠️ Error: 'shared_libs' module not found. Checking .pth file...")
+            ensure_shared_libs_pth_exists()
+
+            # Try again after fixing the .pth file
+            try:
+                from shared_libs.wp_app_config import AppConfig
+
+                print("✅ After correcting the .pth file: Module loaded.")
+                # Your main program logic here...
+            except Exception as e2:
+                print(f"❌ Error after correcting the .pth file: {e2}")
+        else:
+            # For other errors, re-raise them
+            raise
+
+
+if __name__ == "__main__":
+    main()