1 files changed, 45 insertions, 0 deletions
diff --git a/mesonbuild/interpreterbase/disabler.py b/mesonbuild/interpreterbase/disabler.py
new file mode 100644
index 0000000..182bb62
--- /dev/null
+++ b/mesonbuild/interpreterbase/disabler.py
@@ -0,0 +1,45 @@
+# Copyright 2013-2021 The Meson development team
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from __future__ import annotations
+
+import typing as T
+
+from .baseobjects import MesonInterpreterObject
+
+if T.TYPE_CHECKING:
+    from .baseobjects import TYPE_var, TYPE_kwargs
+
+class Disabler(MesonInterpreterObject):
+    def method_call(self, method_name: str, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> TYPE_var:
+        if method_name == 'found':
+            return False
+        return Disabler()
+
+def _is_arg_disabled(arg: T.Any) -> bool:
+    if isinstance(arg, Disabler):
+        return True
+    if isinstance(arg, list):
+        for i in arg:
+            if _is_arg_disabled(i):
+                return True
+    return False
+
+def is_disabled(args: T.Sequence[T.Any], kwargs: T.Dict[str, T.Any]) -> bool:
+    for i in args:
+        if _is_arg_disabled(i):
+            return True
+    for i in kwargs.values():
+        if _is_arg_disabled(i):
+            return True
+    return False