add format-yaml tool

Makefile

@@ -79,7 +79,7 @@ proxy:
 pyenv${PYTHON_VERSION}:
 	virtualenv --python=/usr/bin/python${PYTHON_VERSION} pyenv${PYTHON_VERSION}
 	. pyenv${PYTHON_VERSION}/bin/activate && \
-		pip install azdev && \
+		pip install autopep8 azdev ruamel.yaml && \
 		azdev setup -r . && \
 		sed -i -e "s|^dev_sources = $(PWD)$$|dev_sources = $(PWD)/python|" ~/.azure/config
 
@@ -118,7 +118,8 @@ test-python: generate pyenv${PYTHON_VERSION}
 	. pyenv${PYTHON_VERSION}/bin/activate && \
 		$(MAKE) az && \
 		azdev linter && \
-		azdev style
+		azdev style && \
+		hack/format-yaml/format-yaml.py .pipelines
 
 admin.kubeconfig:
 	hack/get-admin-kubeconfig.sh /subscriptions/${AZURE_SUBSCRIPTION_ID}/resourceGroups/${RESOURCEGROUP}/providers/Microsoft.RedHatOpenShift/openShiftClusters/${CLUSTER} >admin.kubeconfig

hack/format-yaml/format-yaml.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+# Copyright (c) Microsoft Corporation.
+# Licensed under the Apache License 2.0.
+
+import os
+import sys
+import ruamel.yaml
+
+
+def main():
+    yaml = ruamel.yaml.YAML()
+
+    for root, _, files in os.walk(sys.argv[1]):
+        for name in files:
+            if not name.endswith('.yml'):
+                continue
+
+            with open(os.path.join(root, name)) as f:
+                y = yaml.load(f)
+
+            with open(os.path.join(root, name), 'w') as f:
+                yaml.dump(y, f)
+
+
+if __name__ == '__main__':
+    main()