grpc/tools/run_tests/python_utils/comment_on_pr.py

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import os
import json
import urllib2

def comment_on_pr(text):
  if 'JENKINS_OAUTH_TOKEN' not in os.environ:
    print 'Missing JENKINS_OAUTH_TOKEN env var: not commenting'
    return
  if 'ghprbPullId' not in os.environ:
    print 'Missing ghprbPullId env var: not commenting'
    return
  req = urllib2.Request(
      url = 'https://api.github.com/repos/grpc/grpc/issues/%s/comments' %
          os.environ['ghprbPullId'],
      data = json.dumps({'body': text}),
      headers = {
        'Authorization': 'token %s' % os.environ['JENKINS_OAUTH_TOKEN'],
        'Content-Type': 'application/json',
      })
  print urllib2.urlopen(req).read()