| #!/usr/bin/env python3 |
| |
| # |
| # Copyright (C) 2018 The Android Open Source Project |
| # |
| # 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. |
| # |
| |
| """Gerrit Restful API client library.""" |
| |
| from __future__ import print_function |
| |
| import argparse |
| import base64 |
| import json |
| import os |
| import sys |
| import xml.dom.minidom |
| |
| try: |
| # PY3 |
| from urllib.error import HTTPError |
| from urllib.parse import urlencode, urlparse |
| from urllib.request import ( |
| HTTPBasicAuthHandler, Request, build_opener |
| ) |
| except ImportError: |
| # PY2 |
| from urllib import urlencode |
| from urllib2 import ( |
| HTTPBasicAuthHandler, HTTPError, Request, build_opener |
| ) |
| from urlparse import urlparse |
| |
| try: |
| # PY3.5 |
| from subprocess import PIPE, run |
| except ImportError: |
| from subprocess import CalledProcessError, PIPE, Popen |
| |
| class CompletedProcess(object): |
| """Process execution result returned by subprocess.run().""" |
| # pylint: disable=too-few-public-methods |
| |
| def __init__(self, args, returncode, stdout, stderr): |
| self.args = args |
| self.returncode = returncode |
| self.stdout = stdout |
| self.stderr = stderr |
| |
| def run(*args, **kwargs): |
| """Run a command with subprocess.Popen() and redirect input/output.""" |
| |
| check = kwargs.pop('check', False) |
| |
| try: |
| stdin = kwargs.pop('input') |
| assert 'stdin' not in kwargs |
| kwargs['stdin'] = PIPE |
| except KeyError: |
| stdin = None |
| |
| proc = Popen(*args, **kwargs) |
| try: |
| stdout, stderr = proc.communicate(stdin) |
| except: |
| proc.kill() |
| proc.wait() |
| raise |
| returncode = proc.wait() |
| |
| if check and returncode: |
| raise CalledProcessError(returncode, args, stdout) |
| return CompletedProcess(args, returncode, stdout, stderr) |
| |
| |
| def load_auth_credentials_from_file(cookie_file): |
| """Load credentials from an opened .gitcookies file.""" |
| credentials = {} |
| for line in cookie_file: |
| if line.startswith('#HttpOnly_'): |
| line = line[len('#HttpOnly_'):] |
| |
| if not line or line[0] == '#': |
| continue |
| |
| row = line.split('\t') |
| if len(row) != 7: |
| continue |
| |
| domain = row[0] |
| cookie = row[6] |
| |
| sep = cookie.find('=') |
| if sep == -1: |
| continue |
| username = cookie[0:sep] |
| password = cookie[sep + 1:] |
| |
| credentials[domain] = (username, password) |
| return credentials |
| |
| |
| def load_auth_credentials(cookie_file_path): |
| """Load credentials from a .gitcookies file path.""" |
| with open(cookie_file_path, 'r') as cookie_file: |
| return load_auth_credentials_from_file(cookie_file) |
| |
| |
| def create_url_opener(cookie_file_path, domain): |
| """Load username and password from .gitcookies and return a URL opener with |
| an authentication handler.""" |
| |
| # Load authentication credentials |
| credentials = load_auth_credentials(cookie_file_path) |
| username, password = credentials[domain] |
| |
| # Create URL opener with authentication handler |
| auth_handler = HTTPBasicAuthHandler() |
| auth_handler.add_password(domain, domain, username, password) |
| return build_opener(auth_handler) |
| |
| |
| def create_url_opener_from_args(args): |
| """Create URL opener from command line arguments.""" |
| |
| domain = urlparse(args.gerrit).netloc |
| |
| try: |
| return create_url_opener(args.gitcookies, domain) |
| except KeyError: |
| print('error: Cannot find the domain "{}" in "{}". ' |
| .format(domain, args.gitcookies), file=sys.stderr) |
| print('error: Please check the Gerrit Code Review URL or follow the ' |
| 'instructions in ' |
| 'https://android.googlesource.com/platform/development/' |
| '+/master/tools/repo_pull#installation', file=sys.stderr) |
| sys.exit(1) |
| |
| |
| def _decode_xssi_json(data): |
| """Trim XSSI protector and decode JSON objects. |
| |
| Returns: |
| An object returned by json.loads(). |
| |
| Raises: |
| ValueError: If data doesn't start with a XSSI token. |
| json.JSONDecodeError: If data failed to decode. |
| """ |
| |
| # Decode UTF-8 |
| data = data.decode('utf-8') |
| |
| # Trim cross site script inclusion (XSSI) protector |
| if data[0:4] != ')]}\'': |
| raise ValueError('unexpected responsed content: ' + data) |
| data = data[4:] |
| |
| # Parse JSON objects |
| return json.loads(data) |
| |
| |
| def _query_change_lists(url_opener, gerrit, query_string, start, count): |
| """Query change lists from the Gerrit server with a single request. |
| |
| This function performs a single query of the Gerrit server based on the |
| input parameters for a list of changes. The server may return less than |
| the number of changes requested. The caller should check the last record |
| returned for the _more_changes attribute to determine if more changes are |
| available and perform additional queries adjusting the start index. |
| |
| Args: |
| url_opener: URL opener for request |
| gerrit: Gerrit server URL |
| query_string: Gerrit query string to select changes |
| start: Number of changes to be skipped from the beginning |
| count: Maximum number of changes to return |
| |
| Returns: |
| List of changes |
| """ |
| data = [ |
| ('q', query_string), |
| ('o', 'CURRENT_REVISION'), |
| ('o', 'CURRENT_COMMIT'), |
| ('start', str(start)), |
| ('n', str(count)), |
| ] |
| url = gerrit + '/a/changes/?' + urlencode(data) |
| |
| response_file = url_opener.open(url) |
| try: |
| return _decode_xssi_json(response_file.read()) |
| finally: |
| response_file.close() |
| |
| def query_change_lists(url_opener, gerrit, query_string, start, count): |
| """Query change lists from the Gerrit server. |
| |
| This function queries the Gerrit server based on the input parameters for a |
| list of changes. This function handles querying the server multiple times |
| if necessary and combining the results that are returned to the caller. |
| |
| Args: |
| url_opener: URL opener for request |
| gerrit: Gerrit server URL |
| query_string: Gerrit query string to select changes |
| start: Number of changes to be skipped from the beginning |
| count: Maximum number of changes to return |
| |
| Returns: |
| List of changes |
| """ |
| changes = [] |
| while len(changes) < count: |
| chunk = _query_change_lists(url_opener, gerrit, query_string, |
| start + len(changes), count - len(changes)) |
| if not chunk: |
| break |
| |
| changes += chunk |
| |
| # The last change object contains a _more_changes attribute if the |
| # number of changes exceeds the query parameter or the internal server |
| # limit. Stop iteration if `_more_changes` attribute doesn't exist. |
| if '_more_changes' not in chunk[-1]: |
| break |
| |
| return changes |
| |
| |
| def _make_json_post_request(url_opener, url, data, method='POST'): |
| """Open an URL request and decode its response. |
| |
| Returns a 3-tuple of (code, body, json). |
| code: A numerical value, the HTTP status code of the response. |
| body: A bytes, the response body. |
| json: An object, the parsed JSON response. |
| """ |
| |
| data = json.dumps(data).encode('utf-8') |
| headers = { |
| 'Content-Type': 'application/json; charset=UTF-8', |
| } |
| |
| request = Request(url, data, headers) |
| request.get_method = lambda: method |
| |
| try: |
| response_file = url_opener.open(request) |
| except HTTPError as error: |
| response_file = error |
| |
| with response_file: |
| res_code = response_file.getcode() |
| res_body = response_file.read() |
| try: |
| res_json = _decode_xssi_json(res_body) |
| except ValueError: |
| # The response isn't JSON if it doesn't start with a XSSI token. |
| # Possibly a plain text error message or empty body. |
| res_json = None |
| return (res_code, res_body, res_json) |
| |
| |
| def set_review(url_opener, gerrit_url, change_id, labels, message): |
| """Set review votes to a change list.""" |
| |
| url = '{}/a/changes/{}/revisions/current/review'.format( |
| gerrit_url, change_id) |
| |
| data = {} |
| if labels: |
| data['labels'] = labels |
| if message: |
| data['message'] = message |
| |
| return _make_json_post_request(url_opener, url, data) |
| |
| |
| def submit(url_opener, gerrit_url, change_id): |
| """Submit a change list.""" |
| |
| url = '{}/a/changes/{}/submit'.format(gerrit_url, change_id) |
| |
| return _make_json_post_request(url_opener, url, {}) |
| |
| |
| def abandon(url_opener, gerrit_url, change_id, message): |
| """Abandon a change list.""" |
| |
| url = '{}/a/changes/{}/abandon'.format(gerrit_url, change_id) |
| |
| data = {} |
| if message: |
| data['message'] = message |
| |
| return _make_json_post_request(url_opener, url, data) |
| |
| |
| def restore(url_opener, gerrit_url, change_id): |
| """Restore a change list.""" |
| |
| url = '{}/a/changes/{}/restore'.format(gerrit_url, change_id) |
| |
| return _make_json_post_request(url_opener, url, {}) |
| |
| |
| def set_topic(url_opener, gerrit_url, change_id, name): |
| """Set the topic name.""" |
| |
| url = '{}/a/changes/{}/topic'.format(gerrit_url, change_id) |
| data = {'topic': name} |
| return _make_json_post_request(url_opener, url, data, method='PUT') |
| |
| |
| def delete_topic(url_opener, gerrit_url, change_id): |
| """Delete the topic name.""" |
| |
| url = '{}/a/changes/{}/topic'.format(gerrit_url, change_id) |
| |
| return _make_json_post_request(url_opener, url, {}, method='DELETE') |
| |
| |
| def set_hashtags(url_opener, gerrit_url, change_id, add_tags=None, |
| remove_tags=None): |
| """Add or remove hash tags.""" |
| |
| url = '{}/a/changes/{}/hashtags'.format(gerrit_url, change_id) |
| |
| data = {} |
| if add_tags: |
| data['add'] = add_tags |
| if remove_tags: |
| data['remove'] = remove_tags |
| |
| return _make_json_post_request(url_opener, url, data) |
| |
| |
| def add_reviewers(url_opener, gerrit_url, change_id, reviewers): |
| """Add reviewers.""" |
| |
| url = '{}/a/changes/{}/revisions/current/review'.format( |
| gerrit_url, change_id) |
| |
| data = {} |
| if reviewers: |
| data['reviewers'] = reviewers |
| |
| return _make_json_post_request(url_opener, url, data) |
| |
| |
| def delete_reviewer(url_opener, gerrit_url, change_id, name): |
| """Delete reviewer.""" |
| |
| url = '{}/a/changes/{}/reviewers/{}/delete'.format( |
| gerrit_url, change_id, name) |
| |
| return _make_json_post_request(url_opener, url, {}) |
| |
| |
| def get_patch(url_opener, gerrit_url, change_id, revision_id='current'): |
| """Download the patch file.""" |
| |
| url = '{}/a/changes/{}/revisions/{}/patch'.format( |
| gerrit_url, change_id, revision_id) |
| |
| response_file = url_opener.open(url) |
| try: |
| return base64.b64decode(response_file.read()) |
| finally: |
| response_file.close() |
| |
| def find_gerrit_name(): |
| """Find the gerrit instance specified in the default remote.""" |
| manifest_cmd = ['repo', 'manifest'] |
| raw_manifest_xml = run(manifest_cmd, stdout=PIPE, check=True).stdout |
| |
| manifest_xml = xml.dom.minidom.parseString(raw_manifest_xml) |
| default_remote = manifest_xml.getElementsByTagName('default')[0] |
| default_remote_name = default_remote.getAttribute('remote') |
| for remote in manifest_xml.getElementsByTagName('remote'): |
| name = remote.getAttribute('name') |
| review = remote.getAttribute('review') |
| if review and name == default_remote_name: |
| return review.rstrip('/') |
| |
| raise ValueError('cannot find gerrit URL from manifest') |
| |
| def normalize_gerrit_name(gerrit): |
| """Strip the trailing slashes because Gerrit will return 404 when there are |
| redundant trailing slashes.""" |
| return gerrit.rstrip('/') |
| |
| def _parse_args(): |
| """Parse command line options.""" |
| parser = argparse.ArgumentParser() |
| |
| parser.add_argument('query', help='Change list query string') |
| parser.add_argument('-g', '--gerrit', help='Gerrit review URL') |
| |
| parser.add_argument('--gitcookies', |
| default=os.path.expanduser('~/.gitcookies'), |
| help='Gerrit cookie file') |
| parser.add_argument('--limits', default=1000, type=int, |
| help='Max number of change lists') |
| parser.add_argument('--start', default=0, type=int, |
| help='Skip first N changes in query') |
| parser.add_argument('--format', default='json', |
| choices=['json', 'oneline'], |
| help='Print format') |
| |
| return parser.parse_args() |
| |
| def main(): |
| """Main function""" |
| args = _parse_args() |
| |
| if args.gerrit: |
| args.gerrit = normalize_gerrit_name(args.gerrit) |
| else: |
| try: |
| args.gerrit = find_gerrit_name() |
| # pylint: disable=bare-except |
| except: |
| print('gerrit instance not found, use [-g GERRIT]') |
| sys.exit(1) |
| |
| # Query change lists |
| url_opener = create_url_opener_from_args(args) |
| change_lists = query_change_lists( |
| url_opener, args.gerrit, args.query, args.start, args.limits) |
| |
| # Print the result |
| if args.format == 'json': |
| json.dump(change_lists, sys.stdout, indent=4, separators=(', ', ': ')) |
| print() # Print the end-of-line |
| elif args.format == 'oneline': |
| for i, change in enumerate(change_lists): |
| print('{i:<8} {number:<16} {status:<20} ' \ |
| '{change_id:<60} {project:<120} ' \ |
| '{subject}'.format(i=i, |
| project=change['project'], |
| change_id=change['change_id'], |
| status=change['status'], |
| number=change['_number'], |
| subject=change['subject'])) |
| |
| |
| if __name__ == '__main__': |
| main() |
