capa/main.py: move has_rule_with_namespace() to capa.rules.RuleSet

capa/main.py

@@ -134,12 +134,6 @@ def set_vivisect_log_level(level):
     logging.getLogger("Elf").setLevel(level)
 
 
-def has_rule_with_namespace(rules: RuleSet, capabilities: MatchResults, namespace: str) -> bool:
-    return any(
-        rules.rules[rule_name].meta.get("namespace", "").startswith(namespace) for rule_name in capabilities.keys()
-    )
-
-
 def is_supported_format(sample: Path) -> bool:
     """
     Return if this is a supported file based on magic header values

capa/rules/__init__.py

@@ -43,7 +43,7 @@ import capa.features.file
 import capa.features.insn
 import capa.features.common
 import capa.features.basicblock
-from capa.engine import Statement, FeatureSet
+from capa.engine import Statement, FeatureSet, MatchResults
 from capa.features.common import MAX_BYTES_FEATURE_SIZE, Feature
 from capa.features.address import Address
 
@@ -1622,6 +1622,11 @@ class RuleSet:
                             break
         return RuleSet(list(rules_filtered))
 
+    def has_rule_with_namespace(self, capabilities: MatchResults, namespace: str) -> bool:
+        return any(
+            self.rules[rule_name].meta.get("namespace", "").startswith(namespace) for rule_name in capabilities.keys()
+        )
+
     def match(self, scope: Scope, features: FeatureSet, addr: Address) -> Tuple[FeatureSet, ceng.MatchResults]:
         """
         match rules from this ruleset at the given scope against the given features.