Add missing is_used check

nathanjmcdougall · nathanjmcdougall · commit 0223077b3365 · 2025-06-18T17:41:41.000+12:00
diff --git a/src/usethis/_core/tool.py b/src/usethis/_core/tool.py
@@ -402,7 +402,9 @@ def use_ruff(
     ):
         rule_config = _get_basic_rule_config()
         for _tool in ALL_TOOLS:
-            rule_config |= _tool.get_rule_config()
+            tool_rule_config = _tool.get_rule_config()
+            if not tool_rule_config.empty and _tool.is_used():
+                rule_config |= tool_rule_config
     else:
         rule_config = RuleConfig()
 
diff --git a/src/usethis/_tool/rule.py b/src/usethis/_tool/rule.py
@@ -47,6 +47,17 @@ def get_all_ignored(self) -> list[Rule]:
         """Get all (project-scope) ignored rules."""
         return self.ignored + self.unmanaged_ignored
 
+    @property
+    def empty(self) -> bool:
+        """Check if the rule config is empty."""
+        return (
+            not self.selected
+            and not self.ignored
+            and not self.unmanaged_selected
+            and not self.unmanaged_ignored
+            and not self.tests_unmanaged_ignored
+        )
+
     def __repr__(self) -> str:
         """Representation which omits empty-list fields."""
         args = []
