Introduce screening check before is_used to reduce I/O

nathanjmcdougall · nathanjmcdougall · commit 112b2f477b7b · 2025-12-30T16:05:53.000+13:00
diff --git a/src/usethis/_core/tool.py b/src/usethis/_core/tool.py
@@ -327,8 +327,10 @@ def use_pytest(*, remove: bool = False, how: bool = False) -> None:
             if isinstance(_tool, PytestTool):
                 continue
 
-            if _tool.is_used():
-                rule_config |= _tool.get_rule_config().subset_related_to_tests()
+            config = _tool.get_rule_config()
+
+            if config.is_related_to_tests and _tool.is_used():
+                rule_config |= config.subset_related_to_tests()
 
         if RuffTool().is_used():
             RuffTool().apply_rule_config(rule_config)
diff --git a/src/usethis/_tool/rule.py b/src/usethis/_tool/rule.py
@@ -70,6 +70,11 @@ def empty(self) -> bool:
             and not self.tests_unmanaged_ignored
         )
 
+    @property
+    def is_related_to_tests(self) -> bool:
+        """Check if the rule config has any tests-related rules."""
+        return bool(self.tests_unmanaged_ignored)
+
     def __repr__(self) -> str:
         """Representation which omits empty-list fields."""
         args = []
