Make installation undependable from tweaks

Updated copyright years ("better late than never" ahh change)

scripts/config.py

@@ -14,4 +14,5 @@ extracted_gdm_folder = "theme"
 
 # files definitions
 gnome_shell_css = f"{temp_gnome_folder}/gnome-shell.css"
+tweak_file = f"./{tweaks_folder}/*/tweak.py"
 colors_json = "colors.json"

scripts/gdm.py

@@ -159,6 +159,9 @@ class GlobalTheme:
         :param sat: color saturation
         """
 
+        if os.geteuid() != 0:
+            raise Exception("Root privileges required to install GDM theme")
+
         if self.__is_installed():
             print("Theme is installed. Reinstalling...")
             self.gst += ".backup"

scripts/theme.py

@@ -47,7 +47,7 @@ class Theme:
                                  ("BUTTON-TEXT_SECONDARY", "TEXT-BLACK_SECONDARY"))
 
     def __add__(self, other):
-        """Z
+        """
         Add to main styles another styles
         :param other: styles to add
         :return: new Theme object

scripts/tweaks_manager.py

@@ -0,0 +1,58 @@
+import glob
+import os
+from scripts import config
+import importlib.util
+
+
+class TweaksManager:
+    """
+    Tweak manager class to load and apply tweaks from the tweak files in the tweaks folder
+    (I think this class manages the tweaks)
+    """
+
+    def __init__(self):
+        self.tweak_files = glob.glob(config.tweak_file)
+
+    @staticmethod
+    def load_tweak(tweak_file):
+        """
+        Load the tweak module        :return:
+        """
+
+        is_executable = os.access(tweak_file, os.X_OK)
+        if not is_executable:
+            os.chmod(tweak_file, 0o755)
+
+        if os.access(tweak_file, os.X_OK):
+            spec = importlib.util.spec_from_file_location("tweak_module", tweak_file)
+            module = importlib.util.module_from_spec(spec)
+            spec.loader.exec_module(module)
+            return module
+
+        return None
+
+    def define_arguments(self, parser):
+        """
+        Define arguments for the tweaks
+        :param parser: ArgumentParser object
+        """
+
+        for tweak_file in self.tweak_files:
+            tweak_module = self.load_tweak(tweak_file)
+
+            if tweak_module:
+                tweak_module.define_arguments(parser)
+
+    def apply_tweaks(self, args, theme, colors):
+        """
+        Apply the tweaks
+        :param args: parsed arguments
+        :param theme: Theme object
+        :param colors: colors.json object
+        """
+
+        for tweak_file in self.tweak_files:
+            tweak_module = self.load_tweak(tweak_file)
+
+            if tweak_module:
+                tweak_module.apply_tweak(args, theme, colors)