Added an install_forge_libraries function.

main.py

@@ -66,7 +66,32 @@ def install_forge(forge_dir, forge_url):
         print("Forge is already installed.")
 
 # Installs forge files and places them in the correct version folder.
-        
+def install_forge_libraries(forge_libraries_dir, forge_libraries_url):
+    print("Checking for existing Forge libraries installation...")
+    if not Path(forge_libraries_dir).exists():
+        print("Forge libraries not found, beginning download and installation...")
+        os.makedirs(forge_libraries_dir)
+        try:
+            print("Downloading Forge libraries...")
+            response = requests.get(forge_libraries_url)
+            if response.status_code == 200:
+                with zipfile.ZipFile(BytesIO(response.content)) as z:
+                    print("Extracting Forge libraries...")
+                    common_prefix = os.path.commonprefix(z.namelist())
+                    for file_info in z.infolist():
+                        target_path = os.path.join(forge_libraries_dir, file_info.filename[len(common_prefix):])
+                        if file_info.filename.endswith('/'):
+                            os.makedirs(target_path, exist_ok=True)
+                        else:
+                            with z.open(file_info) as source_file, open(target_path, 'wb') as dest_file:
+                                shutil.copyfileobj(source_file, dest_file)
+                print("Forge libraries installed successfully.")
+            else:
+                print("Error downloading Forge libraries. Please check the URL or your internet connection.")
+        except Exception as e:
+            print(f"An error occurred during Forge libraries installation: {e}")
+    else:
+        print("Forge libraries are already installed.")
 
 # Backups the mods from the mods folder to the backup folder.
 def backup_mods(modpack_dir, mods_backup_dir):
@@ -90,6 +115,7 @@ def main():
     try:
         check_minecraft_installation(minecraft_dir)
         install_forge(forge_dir, forge_url)
+        install_forge_libraries(forge_libraries_dir, forge_libraries_url)
         backup_mods(modpack_dir, mods_backup_dir)
     except KeyboardInterrupt:
         print("\033[91m\nSession ended by user.\033[0m")