1 files changed, 28 insertions, 0 deletions
diff --git a/lib/ansiblelint/rules/PlaybookExtension.py b/lib/ansiblelint/rules/PlaybookExtension.py
new file mode 100644
index 0000000..593e5ae
--- /dev/null
+++ b/lib/ansiblelint/rules/PlaybookExtension.py
@@ -0,0 +1,28 @@
+# Copyright (c) 2016, Tsukinowa Inc. <info@tsukinowa.jp>
+# Copyright (c) 2018, Ansible Project
+
+import os
+from typing import List
+
+from ansiblelint.rules import AnsibleLintRule
+
+
+class PlaybookExtension(AnsibleLintRule):
+    id = '205'
+    shortdesc = 'Use ".yml" or ".yaml" playbook extension'
+    description = 'Playbooks should have the ".yml" or ".yaml" extension'
+    severity = 'MEDIUM'
+    tags = ['formatting']
+    done = []  # type: List  # already noticed path list
+    version_added = 'v4.0.0'
+
+    def match(self, file, text):
+        if file['type'] != 'playbook':
+            return False
+
+        path = file['path']
+        ext = os.path.splitext(path)
+        if ext[1] not in ['.yml', '.yaml'] and path not in self.done:
+            self.done.append(path)
+            return True
+        return False