Merge pull request #437 from octivi/yamllint

Add yamllint linter to check manifests files

.yamllint

@@ -0,0 +1,6 @@
+---
+extends: default
+
+rules:
+  line-length:
+    max: 160

manifests/official/gce/deprecated/wheezy-backports.yml

@@ -47,8 +47,8 @@ packages:
         pin-priority: 500
 plugins:
   google_cloud_repo:
-    cleanup_bootstrap_key: True
-    enable_keyring_repo: True
+    cleanup_bootstrap_key: true
+    enable_keyring_repo: true
   ntp:
     servers:
       - metadata.google.internal

manifests/official/gce/deprecated/wheezy.yml

@@ -34,8 +34,8 @@ packages:
     - vim
 plugins:
   google_cloud_repo:
-    cleanup_bootstrap_key: True
-    enable_keyring_repo: True
+    cleanup_bootstrap_key: true
+    enable_keyring_repo: true
   ntp:
     servers:
       - metadata.google.internal

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8, unit, integration, docs
+envlist = flake8, yamllint, unit, integration, docs
 
 [flake8]
 ignore = E221,E241,E501
@@ -38,3 +38,7 @@ deps =
     sphinx != 1.5
     sphinx_rtd_theme
 commands = sphinx-build -W -b html -d _build/html/doctrees . _build/html
+
+[testenv:yamllint]
+deps = yamllint
+commands = yamllint manifests