Check build status with travis before deploying

travsci.py

def ci(branch):
    import requests, json, time

    r = requests.get('http://travis-ci.org/%s/%s/builds.json' % (USERNAME, REPO))
    assert r.status_code == 200
    assert 'json' in r.headers['content-type']
    data = json.loads(r.read())
    builds_by_branch = {}
    for build in data:
        builds_for_branch = builds_by_branch.get(build['branch'], [])
        builds_for_branch.append(build)
        builds_for_branch.sort(key=lambda b: b.get('started_at'))
        builds_for_branch.reverse()
        builds_by_branch[build['branch']] = builds_for_branch

    try:
        build = builds_by_branch[branch][0]
    except (KeyError, IndexError):
        print "Build not submitted for %s yet, waiting..." % branch
        time.sleep(120)
        ci(branch)

    if build['result'] is None:
        print "Build not finished, waiting..."
        time.sleep(90)
        ci(branch)
    elif build['result'] != 0:
        url = "https://travis-ci.org/#!/cmheisel/kardboard/builds/%s" % build['id']
        raise Exception("FAIL: Build %s not passed, result: %s -- %s" % (build['number'], build['result'], url))

    msg = "PASSED %s: %s" % (build['branch'], build['message'])
    print msg