add a validation tool

Add a basic validation tool to check the input values against the
current state of the repository.

Change-Id: I570c7028e4dc469a670ff933fdfe6bde3095d0ac

tools/validate.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+#
+# All Rights Reserved.
+#
+#    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.
+
+"""Try to verify that the latest commit contains valid SHA values.
+
+"""
+
+from __future__ import print_function
+
+import argparse
+import subprocess
+import sys
+
+import requests
+import yaml
+
+CGIT_TEMPLATE = 'http://git.openstack.org/cgit/%s/commit/?id=%s'
+
+COMMON_NAMES = set([
+    'master',
+    'HEAD',
+    'origin/master',
+    'gerrit/master',
+])
+
+
+def find_modified_deliverable_files():
+    "Return a list of files modified by the most recent commit."
+    results = subprocess.check_output(
+        ['git', 'show', '--name-only', '--pretty=format:']
+    )
+    filenames = [
+        l.strip()
+        for l in results.splitlines()
+        if l.startswith('deliverables/')
+    ]
+    return filenames
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        'input',
+        nargs='*',
+        help=('YAML files to validate, defaults to '
+              'files changed in the latest commit'),
+    )
+    args = parser.parse_args()
+
+    filenames = args.input or find_modified_deliverable_files()
+
+    num_errors = 0
+
+    for filename in filenames:
+        print('\nChecking %s' % filename)
+        with open(filename, 'r') as f:
+            deliverable_info = yaml.load(f.read())
+            for release in deliverable_info['releases']:
+                for project in release['projects']:
+                    print('%s %s %s ' % (project['repo'],
+                                         release['version'],
+                                         project['hash']),
+                          end='')
+
+                    if project['hash'] in COMMON_NAMES:
+                        print('NOT A SHA HASH')
+                        num_errors += 1
+                    else:
+                        url = CGIT_TEMPLATE % (project['repo'], project['hash'])
+                        response = requests.get(url)
+                        missing_commit = (
+                            (response.status_code // 100 != 2)
+                            or 'Bad object id' in response.text
+                        )
+                        print('MISSING' if missing_commit else 'found')
+                        if missing_commit:
+                            num_errors += 1
+
+    return 1 if num_errors else 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())

tox.ini

@@ -12,6 +12,9 @@ setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
 
+[testenv:validate]
+commands = {toxinidir}/tools/validate.py {posargs}
+
 [testenv:pep8]
 deps = flake8
 commands = flake8