Add yamllint check to lint job

Initial commit with bootstrapping non-voting configuration
for yamllint. Yamllint checks will be switched from 'warning'
to 'enabled' in subsequent commits together with code adjustments.

Change-Id: Ie372cb9fefb310bd044b4b03064e183f0c8c003b

playbooks/zuul-linter.yaml

@@ -16,3 +16,12 @@
       command: find . -not -path "*/\.*" -not -path "*/doc/build/*" -not -name "*.tgz" -type f -exec egrep -l " +$" {} \;
       register: result
       failed_when: result.stdout != ""
+
+    - name: Check if yamllint.conf exists
+      stat:
+        path: yamllint.conf
+      register: yamllintconf
+
+    - name: Execute yamllint check for values* yaml files
+      command: tox -e lint
+      when: yamllintconf.stat.exists == True

tox.ini

@@ -20,3 +20,14 @@ commands =
   sphinx-build -W -b html doc/source doc/build/html
 whitelist_externals =
   rm
+
+[testenv:lint]
+deps = yamllint
+commands =
+  bash -c "rm -rf {toxinidir}/.yamllint"
+  bash -c "mkdir -p {toxinidir}/.yamllint"
+  bash -c "cp -r $(ls {toxinidir}) {toxinidir}/.yamllint/"
+  bash -c "find {toxinidir}/.yamllint -type f -exec sed -i 's/%%%.*/XXX/g' \{\} +"
+  bash -c "yamllint -c {toxinidir}/yamllint.conf {toxinidir}/.yamllint/*/values*"
+whitelist_externals =
+  bash

yamllint.conf

@@ -0,0 +1,49 @@
+---
+
+yaml-files:
+- '*.yaml'
+- '*.yml'
+- '.yamllint'
+
+rules:
+  braces:
+    level: warning
+  brackets:
+    level: warning
+  colons:
+    level: warning
+  commas:
+    level: warning
+  comments:
+    level: warning
+  comments-indentation:
+    level: warning
+  document-end:
+    level: warning
+  document-start:
+    level: warning
+  empty-lines:
+    level: warning
+  empty-values:
+    level: warning
+  hyphens:
+    level: warning
+  indentation:
+    spaces: 2
+    indent-sequences: whatever
+    level: warning
+  key-duplicates:
+    level: warning
+  key-ordering: disable
+  line-length: disable
+  new-line-at-end-of-file:
+    level: warning
+  new-lines:
+    level: warning
+  octal-values:
+    level: warning
+  quoted-strings: disable
+  trailing-spaces: enable
+  truthy:
+    level: warning
+...

zuul.d/playbooks/lint.yml

@@ -21,3 +21,14 @@
       failed_when: _found_whitespaces.stdout != ""
       args:
         chdir: "{{ ansible_user_dir }}/src/{{ zuul.project.canonical_name }}"
+
+    - name: Check if yamllint.conf exists
+      stat:
+        path: "{{ ansible_user_dir }}/src/{{ zuul.project.canonical_name }}/yamllint.conf"
+      register: yamllintconf
+
+    - name: Execute yamllint check for values* yaml files
+      command: tox -e lint
+      args:
+        chdir: "{{ ansible_user_dir }}/src/{{ zuul.project.canonical_name }}"
+      when: yamllintconf.stat.exists == True