Add check for 'release:has-stable-branches'

repo based tag validation that checks for the existence of a branch named
stable/kilo.

Change-Id: Icd88d94f8e2fe8c75553cb02d150eaa07b73aacb

tools/stable.py

@@ -0,0 +1,51 @@
+# 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.
+
+import json
+import urllib
+
+import requests
+
+import base
+
+# Specify stable branch to look for. Some repos contain stable branches
+# but not for the most recent release.
+# TODO(jogo): figure out to stop hard coding this.
+latest_stable_branch = "kilo"
+
+
+class ValidateStableBranches(base.ValidatorBase):
+
+    @staticmethod
+    def has_stable_branch(repo):
+        response = requests.get(
+            'https://review.openstack.org:443/projects/%s/branches' %
+            urllib.quote_plus(repo))
+        # strip off first few chars because 'the JSON response body starts with
+        # a magic prefix line that must be stripped before feeding the rest of
+        # the response body to a JSON parser'
+        # https://review.openstack.org/Documentation/rest-api.html
+        branches = json.loads(response.text[4:])
+        for branch in branches:
+            if branch['ref'].startswith("refs/heads/stable/%s" %
+                                        latest_stable_branch):
+                return True
+        return False
+
+    @staticmethod
+    def validate(repo):
+        """Return True of team should contain the tag get_tag_name()"""
+        return ValidateStableBranches.has_stable_branch(repo)
+
+    @staticmethod
+    def get_tag_name():
+        return "release:has-stable-branches"

tools/validate_tags.py

@@ -22,6 +22,7 @@ and reorder projects.yaml
 """
 
 import diversity
+import stable
 
 import requests
 import yaml
@@ -37,6 +38,7 @@ team_validators = [
 
 # List of modules to validate repository based tags
 repo_validators = [
+    stable.ValidateStableBranches,
 ]