Added script to validate jinja templates

* tox -e validate-jinja
* Added to ci-jobs

Change-Id: I799ec9e586a96800ee592522a0c1af7bd591ca67

ci-scripts/validate_jinja2.py

@@ -0,0 +1,60 @@
+#!/usr/bin/python
+# coding: utf-8 -*-
+#
+# (c) 2017, Chandan Kumar <chkumar@redhat.com>
+#
+# 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.
+DOCUMENTATION = '''
+---
+python script to read and parse jinja2 templates
+---
+'''
+
+from jinja2 import Environment
+from jinja2 import exceptions
+
+import os
+
+# Jinja Environment
+env = Environment()
+
+
+def get_jinja_files(dir_path):
+    """Get all the .j2 and .jinja2 files"""
+    files_path = []
+    for root, subdir, files in os.walk(dir_path):
+        for file in files:
+            if file.endswith('.j2') or file.endswith('.jinja2'):
+                files_path.append(os.path.join(root, file))
+
+    return files_path
+
+
+def validate_jinja_templates(file_path):
+    """Validate jinja templates file"""
+    try:
+        with open(file_path) as fobj:
+            env.parse(fobj.read())
+    except exceptions.TemplateSyntaxError as e:
+        print('%s has template error: %s' % (file_path, e))
+        raise(e)
+
+
+if __name__ == "__main__":
+    os.chdir("..")
+    root_path = os.getcwd()
+    jinja_files = get_jinja_files(root_path)
+    for file_path in jinja_files:
+        validate_jinja_templates(file_path)
+        print('Validating: %s' % file_path)

test-requirements.txt

@@ -5,3 +5,4 @@ ansible-lint
 sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
 reno>=1.8.0  # Apache-2.0
+jinja2

tox.ini

@@ -64,6 +64,7 @@ commands =
     {[testenv:bashate]commands}
     {[testenv:pep8]commands}
     {[testenv:ansible-lint]commands}
+    {[testenv:validate-jinja]commands}
 
 [testenv:venv]
 commands = {posargs}
@@ -79,3 +80,8 @@ commands = {posargs}
 show-source = True
 ignore = E123,E125,E402,E501,F403,H303,H301,F405
 builtins = _
+
+[testenv:validate-jinja]
+basepython=python2
+commands =
+  python ci-scripts/validate_jinja2.py