Release management using CircleCI (#3498)

* Release management using CircleCI

* Changelog updated

scripts/release_management/github-openpr.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+# Open a PR against the develop branch. --branch required.
+# Optimized for CircleCI
+
+import json
+import os
+import argparse
+import httplib
+from base64 import b64encode
+
+
+def request(org, repo, data):
+  user_and_pass = b64encode(b"{0}:{1}".format(os.environ['GITHUB_USERNAME'], os.environ['GITHUB_TOKEN'])).decode("ascii")
+  headers = {
+    'User-Agent': 'tenderbot',
+    'Accept': 'application/vnd.github.v3+json',
+    'Authorization': 'Basic %s' % user_and_pass
+  }
+
+  conn = httplib.HTTPSConnection('api.github.com', timeout=5)
+  conn.request('POST', '/repos/{0}/{1}/pulls'.format(org,repo), data, headers)
+  response = conn.getresponse()
+  if response.status < 200 or response.status > 299:
+    print(response)
+    conn.close()
+    raise IOError(response.reason)
+  responsedata = response.read()
+  conn.close()
+  return json.loads(responsedata)
+
+
+if __name__ == "__main__":
+  parser = argparse.ArgumentParser()
+  parser.add_argument("--org", default="tendermint", help="GitHub organization. Defaults to tendermint.")
+  parser.add_argument("--repo", default="tendermint", help="GitHub repository. Defaults to tendermint.")
+  parser.add_argument("--head", help="The name of the branch where your changes are implemented.", required=True)
+  parser.add_argument("--base", help="The name of the branch you want the changes pulled into.", required=True)
+  parser.add_argument("--title", default="Security release {0}".format(os.environ.get('CIRCLE_TAG')), help="The title of the pull request.")
+  args = parser.parse_args()
+
+  if not os.environ.has_key('GITHUB_USERNAME'):
+    raise parser.error('GITHUB_USERNAME not set.')
+
+  if not os.environ.has_key('GITHUB_TOKEN'):
+    raise parser.error('GITHUB_TOKEN not set.')
+
+  if os.environ.get('CIRCLE_TAG') is None:
+    raise parser.error('CIRCLE_TAG not set.')
+
+  result = request(args.org, args.repo, data=json.dumps({'title':"{0}".format(args.title),'head':"{0}".format(args.head),'base':"{0}".format(args.base),'body':"<Please fill in details.>"}))
+  print(result['html_url'])