[BACKEND] Optimize script initialization

src/ytdl_sub/config/overrides.py

@@ -133,6 +133,8 @@ class Overrides(DictFormatterValidator, Scriptable):
         """
         Initialize the override script with override variables + any unresolved variables
         """
+        self.initialize_base_script()
+
         self.script.add(
             ScriptUtils.add_sanitized_variables(
                 {SubscriptionVariables.subscription_name(): subscription_name}

src/ytdl_sub/entries/entry.py

@@ -44,12 +44,6 @@ class Entry(BaseEntry, Scriptable):
         BaseEntry.__init__(self, entry_dict=entry_dict, working_directory=working_directory)
         Scriptable.__init__(self)
 
-    def _add_entry_kwargs_to_script(self) -> None:
-        # Add entry metadata, but avoid the `.add()` helper since it also adds sanitized
-        self.unresolvable.remove(v.entry_metadata.variable_name)
-        self.script.add({v.entry_metadata.variable_name: ScriptUtils.to_script(self._kwargs)})
-        self.update_script()
-
     def initialize_script(self, other: Optional[Scriptable] = None) -> "Entry":
         """
         Initializes the entry script using the Overrides script, then adding
@@ -57,12 +51,20 @@ class Entry(BaseEntry, Scriptable):
         """
         # Overrides contains added variables that are unresolvable, add them here
         if other:
-            self.script = copy.deepcopy(other.script)
+            self._script = copy.deepcopy(other.script)
-            self.unresolvable = copy.deepcopy(other.unresolvable)
+            self._unresolvable = copy.deepcopy(other.unresolvable)
+        else:
+            self.initialize_base_script()
 
         self._add_entry_kwargs_to_script()
         return self
 
+    def _add_entry_kwargs_to_script(self) -> None:
+        # Add entry metadata, but avoid the `.add()` helper since it also adds sanitized
+        self.unresolvable.remove(v.entry_metadata.variable_name)
+        self.script.add({v.entry_metadata.variable_name: ScriptUtils.to_script(self._kwargs)})
+        self.update_script()
+
     def get(self, variable: Variable, expected_type: Type[TypeT]) -> TypeT:
         """
         Gets a variable of an expected type. Will error if it does not exist or is not resolved.

src/ytdl_sub/utils/scriptable.py

@@ -2,6 +2,7 @@ import copy
 from abc import ABC
 from typing import Any
 from typing import Dict
+from typing import Optional
 from typing import Set
 
 from ytdl_sub.entries.script.function_scripts import CUSTOM_FUNCTION_SCRIPTS
@@ -13,21 +14,35 @@ from ytdl_sub.script.utils.exceptions import RuntimeException
 from ytdl_sub.utils.exceptions import StringFormattingException
 from ytdl_sub.utils.script import ScriptUtils
 
+_BASE_SCRIPT: Script = Script(
+    ScriptUtils.add_sanitized_variables(
+        dict(copy.deepcopy(VARIABLE_SCRIPTS), **copy.deepcopy(CUSTOM_FUNCTION_SCRIPTS))
+    )
+)
+
 
 class Scriptable(ABC):
     """
     Shared class between Entry and Overrides to manage their underlying Script.
     """
 
-    _BASE_SCRIPT: Script = Script(
-        ScriptUtils.add_sanitized_variables(
-            dict(copy.deepcopy(VARIABLE_SCRIPTS), **copy.deepcopy(CUSTOM_FUNCTION_SCRIPTS))
-        )
-    )
-
     def __init__(self):
-        self.script = copy.deepcopy(Scriptable._BASE_SCRIPT)
+        self._script: Optional[Script] = None
-        self.unresolvable: Set[str] = copy.deepcopy(UNRESOLVED_VARIABLES)
+        self._unresolvable: Optional[Set[str]] = None
+
+    def initialize_base_script(self):
+        self._script = copy.deepcopy(_BASE_SCRIPT)
+        self._unresolvable = copy.deepcopy(UNRESOLVED_VARIABLES)
+
+    @property
+    def script(self) -> Script:
+        assert self._script is not None, "Not initialized"
+        return self._script
+
+    @property
+    def unresolvable(self) -> Set[str]:
+        assert self._unresolvable is not None, "Not initialized"
+        return self._unresolvable
 
     def update_script(self) -> None:
         """
@@ -45,7 +60,7 @@ class Scriptable(ABC):
             for var, definition in values.items()
         }
 
-        self.unresolvable -= set(list(values_as_str.keys()))
+        self._unresolvable -= set(list(values_as_str.keys()))
         self.script.add(
             ScriptUtils.add_sanitized_variables(
                 {