do not resolve sanitizied using filter

src/ytdl_sub/config/validators/variable_validation.py

@@ -1,5 +1,6 @@
 from typing import Dict
 from typing import List
+from typing import Set
 
 from ytdl_sub.config.overrides import Overrides
 from ytdl_sub.config.plugin.plugin_mapping import PluginMapping
@@ -36,14 +37,29 @@ class ResolutionLevel:
 
 class VariableValidation:
 
+    def _get_resolve_partial_filter(self) -> Set[str]:
+        # Exclude sanitized variables from partial validation. This lessens the work
+        # and prevents double-evaluation, which can lead to bad behavior like double-prints.
+        return {
+            name
+            for name in self.script.variable_names
+            if name not in self.unresolved_variables and not name.endswith("_sanitized")
+        }
+
     def _apply_resolution_level(self) -> None:
         if self._resolution_level == ResolutionLevel.RESOLVE:
             # Partial resolve everything, but not including internal variables
             self.unresolved_variables |= VARIABLES.variable_names(include_sanitized=True)
-            self.script = self.script.resolve_partial(unresolvable=self.unresolved_variables)
+            self.script = self.script.resolve_partial(
+                unresolvable=self.unresolved_variables,
+                output_filter=self._get_resolve_partial_filter(),
+            )
         elif self._resolution_level == ResolutionLevel.INTERNAL:
             # Partial resolve everything including internal variables
-            self.script = self.script.resolve_partial(unresolvable=self.unresolved_variables)
+            self.script = self.script.resolve_partial(
+                unresolvable=self.unresolved_variables,
+                output_filter=self._get_resolve_partial_filter(),
+            )
         else:
             raise ValueError("Invalid resolution level for validation")
 

src/ytdl_sub/script/script.py

@@ -742,11 +742,10 @@ class Script:
                 if isinstance(definition, Variable) and definition.name not in unresolvable:
                     if definition in resolved:
                         maybe_resolved = resolved[definition]
+                    elif definition in unresolved:
+                        maybe_resolved = unresolved[definition]
                     else:
-                        # If it's not in resolved, it must be in unresolved.
-                        # Do not modify the definition, this avoids duplicate work because it will
-                        # wait for the single dependent variable to be resolved.
-                        assert definition in unresolved
+                        raise UNREACHABLE
                 elif isinstance(definition, VariableDependency):
                     maybe_resolved = definition.partial_resolve(
                         resolved_variables=resolved,
@@ -784,8 +783,9 @@ class Script:
     def resolve_partial(
         self,
         unresolvable: Optional[Set[str]] = None,
+        output_filter: Optional[Set[str]] = None,
     ) -> "Script":
-        out = self._resolve_partial(unresolvable=unresolvable)
+        out = self._resolve_partial(unresolvable=unresolvable, output_filter=output_filter)
         for var_name, definition in out.items():
             self._variables[var_name] = definition
 

src/ytdl_sub/script/types/variable_dependency.py

@@ -281,5 +281,7 @@ class VariableDependency(ABC):
             elif isinstance(arg, Variable):
                 if arg not in resolved_variables:
                     is_resolvable = False
+                    if arg in unresolved_variables:
+                        maybe_resolvable_args[-1] = unresolved_variables[arg]
 
         return maybe_resolvable_args, is_resolvable