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# Copyright 2018 The gRPC Authors
#
# 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.
from __future__ import print_function
import datetime
import json
import os
import sys
import time
import traceback
import jwt
import requests
_GITHUB_API_PREFIX = 'https://api.github.com'
_GITHUB_REPO = 'grpc/grpc'
_GITHUB_APP_ID = 22338
_INSTALLATION_ID = 519109
_ACCESS_TOKEN_CACHE = None
_ACCESS_TOKEN_FETCH_RETRIES = 6
_ACCESS_TOKEN_FETCH_RETRIES_INTERVAL_S = 15
_CHANGE_LABELS = {
-1: 'improvement',
0: 'none',
1: 'low',
2: 'medium',
3: 'high',
}
_INCREASE_DECREASE = {
-1: 'decrease',
0: 'neutral',
1: 'increase',
}
def _jwt_token():
github_app_key = open(
os.path.join(os.environ['KOKORO_KEYSTORE_DIR'],
'73836_grpc_checks_private_key'), 'rb').read()
return jwt.encode(
{
'iat': int(time.time()),
'exp': int(time.time() + 60 * 10), # expire in 10 minutes
'iss': _GITHUB_APP_ID,
},
github_app_key,
algorithm='RS256')
def _access_token():
global _ACCESS_TOKEN_CACHE
if _ACCESS_TOKEN_CACHE == None or _ACCESS_TOKEN_CACHE['exp'] < time.time():
for i in range(_ACCESS_TOKEN_FETCH_RETRIES):
resp = requests.post(
url='https://api.github.com/app/installations/%s/access_tokens'
% _INSTALLATION_ID,
headers={
'Authorization': 'Bearer %s' % _jwt_token(),
'Accept': 'application/vnd.github.machine-man-preview+json',
})
try:
_ACCESS_TOKEN_CACHE = {
'token': resp.json()['token'],
'exp': time.time() + 60
}
break
except (KeyError, ValueError):
traceback.print_exc()
print('HTTP Status %d %s' % (resp.status_code, resp.reason))
print("Fetch access token from Github API failed:")
print(resp.text)
if i != _ACCESS_TOKEN_FETCH_RETRIES - 1:
print('Retrying after %.2f second.' %
_ACCESS_TOKEN_FETCH_RETRIES_INTERVAL_S)
time.sleep(_ACCESS_TOKEN_FETCH_RETRIES_INTERVAL_S)
else:
print("error: Unable to fetch access token, exiting...")
sys.exit(0)
return _ACCESS_TOKEN_CACHE['token']
def _call(url, method='GET', json=None):
if not url.startswith('https://'):
url = _GITHUB_API_PREFIX + url
headers = {
'Authorization': 'Bearer %s' % _access_token(),
'Accept': 'application/vnd.github.antiope-preview+json',
}
return requests.request(method=method, url=url, headers=headers, json=json)
def _latest_commit():
resp = _call(
'/repos/%s/pulls/%s/commits' %
(_GITHUB_REPO, os.environ['KOKORO_GITHUB_PULL_REQUEST_NUMBER']))
return resp.json()[-1]
def check_on_pr(name, summary, success=True):
"""Create/Update a check on current pull request.
The check runs are aggregated by their name, so newer check will update the
older check with the same name.
Requires environment variable 'KOKORO_GITHUB_PULL_REQUEST_NUMBER' to indicate which pull request
should be updated.
Args:
name: The name of the check.
summary: A str in Markdown to be used as the detail information of the check.
success: A bool indicates whether the check is succeed or not.
"""
if 'KOKORO_GIT_COMMIT' not in os.environ:
print('Missing KOKORO_GIT_COMMIT env var: not checking')
return
if 'KOKORO_KEYSTORE_DIR' not in os.environ:
print('Missing KOKORO_KEYSTORE_DIR env var: not checking')
return
if 'KOKORO_GITHUB_PULL_REQUEST_NUMBER' not in os.environ:
print('Missing KOKORO_GITHUB_PULL_REQUEST_NUMBER env var: not checking')
return
MAX_SUMMARY_LEN = 65400
if len(summary) > MAX_SUMMARY_LEN:
# Drop some hints to the log should someone come looking for what really happened!
print('Clipping too long summary')
print(summary)
summary = summary[:MAX_SUMMARY_LEN] + '\n\n\n... CLIPPED (too long)'
completion_time = str(
datetime.datetime.utcnow().replace(microsecond=0).isoformat()) + 'Z'
resp = _call('/repos/%s/check-runs' % _GITHUB_REPO,
method='POST',
json={
'name': name,
'head_sha': os.environ['KOKORO_GIT_COMMIT'],
'status': 'completed',
'completed_at': completion_time,
'conclusion': 'success' if success else 'failure',
'output': {
'title': name,
'summary': summary,
}
})
print('Result of Creating/Updating Check on PR:',
json.dumps(resp.json(), indent=2))
def label_significance_on_pr(name, change, labels=_CHANGE_LABELS):
"""Add a label to the PR indicating the significance of the check.
Requires environment variable 'KOKORO_GITHUB_PULL_REQUEST_NUMBER' to indicate which pull request
should be updated.
Args:
name: The name of the label.
value: A str in Markdown to be used as the detail information of the label.
"""
if change < min(list(labels.keys())):
change = min(list(labels.keys()))
if change > max(list(labels.keys())):
change = max(list(labels.keys()))
value = labels[change]
if 'KOKORO_GIT_COMMIT' not in os.environ:
print('Missing KOKORO_GIT_COMMIT env var: not checking')
return
if 'KOKORO_KEYSTORE_DIR' not in os.environ:
print('Missing KOKORO_KEYSTORE_DIR env var: not checking')
return
if 'KOKORO_GITHUB_PULL_REQUEST_NUMBER' not in os.environ:
print('Missing KOKORO_GITHUB_PULL_REQUEST_NUMBER env var: not checking')
return
existing = _call(
'/repos/%s/issues/%s/labels' %
(_GITHUB_REPO, os.environ['KOKORO_GITHUB_PULL_REQUEST_NUMBER']),
method='GET').json()
print('Result of fetching labels on PR:', existing)
new = [x['name'] for x in existing if not x['name'].startswith(name + '/')]
new.append(name + '/' + value)
resp = _call(
'/repos/%s/issues/%s/labels' %
(_GITHUB_REPO, os.environ['KOKORO_GITHUB_PULL_REQUEST_NUMBER']),
method='PUT',
json=new)
print('Result of setting labels on PR:', resp.text)
def label_increase_decrease_on_pr(name, change, significant):
if change <= -significant:
label_significance_on_pr(name, -1, _INCREASE_DECREASE)
elif change >= significant:
label_significance_on_pr(name, 1, _INCREASE_DECREASE)
else:
label_significance_on_pr(name, 0, _INCREASE_DECREASE)
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