# Copyright (C) 2018 Breezy Developers # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA """Support for GitHub.""" from __future__ import absolute_import import json import os from .propose import ( Hoster, HosterLoginRequired, MergeProposal, MergeProposalBuilder, MergeProposalExists, NoSuchProject, PrerequisiteBranchUnsupported, ReopenFailed, UnsupportedHoster, ) from ... import ( bedding, branch as _mod_branch, controldir, errors, hooks, urlutils, version_string as breezy_version, ) from ...config import AuthenticationConfig, GlobalStack from ...errors import InvalidHttpResponse from ...git.urls import git_url_to_bzr_url from ...i18n import gettext from ...sixish import PY3 from ...trace import note from ...transport import get_transport from ...transport.http import default_user_agent GITHUB_HOST = 'github.com' WEB_GITHUB_URL = 'https://github.com' API_GITHUB_URL = 'https://api.github.com' def store_github_token(scheme, host, token): with open(os.path.join(bedding.config_dir(), 'github.conf'), 'w') as f: f.write(token) def retrieve_github_token(scheme, host): path = os.path.join(bedding.config_dir(), 'github.conf') if not os.path.exists(path): return None with open(path, 'r') as f: return f.read().strip() def determine_title(description): return description.splitlines()[0] class ValidationFailed(errors.BzrError): _fmt = "GitHub validation failed: %(error)s" def __init__(self, error): errors.BzrError.__init__(self) self.error = error class NotGitHubUrl(errors.BzrError): _fmt = "Not a GitHub URL: %(url)s" def __init__(self, url): errors.BzrError.__init__(self) self.url = url class GitHubLoginRequired(HosterLoginRequired): _fmt = "Action requires GitHub login." def connect_github(): """Connect to GitHub. """ user_agent = default_user_agent() auth = AuthenticationConfig() credentials = auth.get_credentials('https', GITHUB_HOST) if credentials is not None: return Github(credentials['user'], credentials['password'], user_agent=user_agent) # TODO(jelmer): token = auth.get_token('https', GITHUB_HOST) if token is not None: return Github(token, user_agent=user_agent) else: note('Accessing GitHub anonymously. To log in, run \'brz gh-login\'.') return Github(user_agent=user_agent) class GitHubMergeProposal(MergeProposal): def __init__(self, gh, pr): self._gh = gh self._pr = pr def __repr__(self): return "<%s at %r>" % (type(self).__name__, self.url) @property def url(self): return self._pr['html_url'] def _branch_from_part(self, part): if part['repo'] is None: return None return github_url_to_bzr_url(part['repo']['html_url'], part['ref']) def get_source_branch_url(self): return self._branch_from_part(self._pr['head']) def get_target_branch_url(self): return self._branch_from_part(self._pr['base']) def get_description(self): return self._pr['body'] def get_commit_message(self): return None def set_commit_message(self, message): self._patch({'title': message}) def _patch(self, data): response = self._gh._api_request( 'PATCH', self._pr['url'], body=json.dumps(data).encode('utf-8')) if response.status == 422: raise ValidationFailed(json.loads(response.text)) if response.status != 200: raise InvalidHttpResponse(self._pr['url'], response.text) self._pr = json.loads(response.text) def set_description(self, description): self._patch({ 'body': description, 'title': determine_title(description), }) def is_merged(self): return bool(self._pr.get('merged_at')) def is_closed(self): return self._pr['state'] == 'closed' and not bool(self._pr.get('merged_at')) def reopen(self): try: self._patch({'state': 'open'}) except ValidationFailed as e: raise ReopenFailed(e.error['errors'][0]['message']) def close(self): self._patch({'state': 'closed'}) def can_be_merged(self): return self._pr['mergeable'] def merge(self, commit_message=None): # https://developer.github.com/v3/pulls/#merge-a-pull-request-merge-button self._pr.merge(commit_message=commit_message) def parse_github_url(url): (scheme, user, password, host, port, path) = urlutils.parse_url( url) if host != GITHUB_HOST: raise NotGitHubUrl(url) (owner, repo_name) = path.strip('/').split('/') if repo_name.endswith('.git'): repo_name = repo_name[:-4] return owner, repo_name def parse_github_branch_url(branch): url = urlutils.split_segment_parameters(branch.user_url)[0] owner, repo_name = parse_github_url(url) return owner, repo_name, branch.name def github_url_to_bzr_url(url, branch_name): if not PY3: branch_name = branch_name.encode('utf-8') return urlutils.join_segment_parameters( git_url_to_bzr_url(url), {"branch": branch_name}) class GitHub(Hoster): name = 'github' supports_merge_proposal_labels = True supports_merge_proposal_commit_message = False def __repr__(self): return "GitHub()" def _api_request(self, method, path, body=None): headers = { 'Accept': 'application/vnd.github.v3+json'} if self._token: headers['Authorization'] = 'token %s' % self._token response = self.transport.request( method, urlutils.join(self.transport.base, path), headers=headers, body=body, retries=3) if response.status == 401: raise GitHubLoginRequired(self) return response def _get_repo(self, path): path = 'repos/' + path response = self._api_request('GET', path) if response.status == 404: raise NoSuchProject(path) if response.status == 200: return json.loads(response.text) raise InvalidHttpResponse(path, response.text) def _get_repo_pulls(self, path, head=None, state=None): path = 'repos/' + path + '/pulls?' params = {} if head is not None: params['head'] = head if state is not None: params['state'] = state path += ';'.join(['%s=%s' % (k, urlutils.quote(v)) for k, v in params.items()]) response = self._api_request('GET', path) if response.status == 404: raise NoSuchProject(path) if response.status == 200: return json.loads(response.text) raise InvalidHttpResponse(path, response.text) def _create_pull(self, path, title, head, base, body=None): path = 'repos/' + path + '/pulls' data = { 'title': title, 'head': head, 'base': base, } if body: data['body'] = body response = self._api_request( 'POST', path, body=json.dumps(data).encode('utf-8')) if response.status != 201: raise InvalidHttpResponse(path, response.text) return json.loads(response.text) def _get_user_by_email(self, email): path = 'search/users?q=%s+in:email' % email response = self._api_request('GET', path) if response.status != 200: raise InvalidHttpResponse(path, response.text) ret = json.loads(response.text) if ret['total_count'] == 0: raise KeyError('no user with email %s' % email) elif ret['total_count'] > 1: raise ValueError('more than one result for email %s' % email) return ret['items'][0] def _get_user(self, username=None): if username: path = 'users/:%s' % username else: path = 'user' response = self._api_request('GET', path) if response.status != 200: raise InvalidHttpResponse(path, response.text) return json.loads(response.text) def _get_organization(self, name): path = 'orgs/:%s' % name response = self._api_request('GET', path) if response.status != 200: raise InvalidHttpResponse(path, response.text) return json.loads(response.text) def _search_issues(self, query): path = 'search/issues' response = self._api_request( 'GET', path + '?q=' + urlutils.quote(query)) if response.status != 200: raise InvalidHttpResponse(path, response.text) return json.loads(response.text) def _create_fork(self, repo, owner=None): (orig_owner, orig_repo) = repo.split('/') path = '/repos/:%s/:%s/forks' % (orig_owner, orig_repo) if owner: path += '?organization=%s' % owner response = self._api_request('POST', path) if response.status != 202: raise InvalidHttpResponse(path, response.text) return json.loads(response.text) @property def base_url(self): return WEB_GITHUB_URL def __init__(self, transport): self._token = retrieve_github_token('https', GITHUB_HOST) self.transport = transport self._current_user = self._get_user() def publish_derived(self, local_branch, base_branch, name, project=None, owner=None, revision_id=None, overwrite=False, allow_lossy=True): import github base_owner, base_project, base_branch_name = parse_github_branch_url(base_branch) base_repo = self._get_repo('%s/%s' % (base_owner, base_project)) if owner is None: owner = self._current_user['login'] if project is None: project = base_repo['name'] try: remote_repo = self._get_repo('%s/%s' % (owner, project)) except github.UnknownObjectException: base_repo = self._get_repo('%s/%s' % (base_owner, base_project)) remote_repo = self._create_fork(base_repo, owner) note(gettext('Forking new repository %s from %s') % (remote_repo['html_url'], base_repo['html_url'])) else: note(gettext('Reusing existing repository %s') % remote_repo['html_url']) remote_dir = controldir.ControlDir.open(git_url_to_bzr_url(remote_repo['ssh_url'])) try: push_result = remote_dir.push_branch( local_branch, revision_id=revision_id, overwrite=overwrite, name=name) except errors.NoRoundtrippingSupport: if not allow_lossy: raise push_result = remote_dir.push_branch( local_branch, revision_id=revision_id, overwrite=overwrite, name=name, lossy=True) return push_result.target_branch, github_url_to_bzr_url( remote_repo['html_url'], name) def get_push_url(self, branch): owner, project, branch_name = parse_github_branch_url(branch) repo = self._get_repo('%s/%s' % (owner, project)) return github_url_to_bzr_url(repo['ssh_url'], branch_name) def get_derived_branch(self, base_branch, name, project=None, owner=None): import github base_owner, base_project, base_branch_name = parse_github_branch_url(base_branch) base_repo = self._get_repo('%s/%s' % (base_owner, base_project)) if owner is None: owner = self._current_user['login'] if project is None: project = base_repo['name'] try: remote_repo = self._get_repo('%s/%s' % (owner, project)) full_url = github_url_to_bzr_url(remote_repo['ssh_url'], name) return _mod_branch.Branch.open(full_url) except github.UnknownObjectException: raise errors.NotBranchError('%s/%s/%s' % (WEB_GITHUB_URL, owner, project)) def get_proposer(self, source_branch, target_branch): return GitHubMergeProposalBuilder(self, source_branch, target_branch) def iter_proposals(self, source_branch, target_branch, status='open'): (source_owner, source_repo_name, source_branch_name) = ( parse_github_branch_url(source_branch)) (target_owner, target_repo_name, target_branch_name) = ( parse_github_branch_url(target_branch)) target_repo_path = "%s/%s" % (target_owner, target_repo_name) target_repo = self._get_repo(target_repo_path) state = { 'open': 'open', 'merged': 'closed', 'closed': 'closed', 'all': 'all'} pulls = self._get_repo_pulls( target_repo_path, head=target_branch_name, state=state[status]) for pull in pulls: if (status == 'closed' and pull['merged'] or status == 'merged' and not pull['merged']): continue if pull['head']['ref'] != source_branch_name: continue if pull['head']['repo'] is None: # Repo has gone the way of the dodo continue if (pull['head']['repo']['owner']['login'] != source_owner or pull['head']['repo']['name'] != source_repo_name): continue yield GitHubMergeProposal(self, pull) def hosts(self, branch): try: parse_github_branch_url(branch) except NotGitHubUrl: return False else: return True @classmethod def probe_from_url(cls, url, possible_transports=None): try: parse_github_url(url) except NotGitHubUrl: raise UnsupportedHoster(url) transport = get_transport( API_GITHUB_URL, possible_transports=possible_transports) return cls(transport) @classmethod def iter_instances(cls): yield cls(get_transport(API_GITHUB_URL)) def iter_my_proposals(self, status='open'): query = ['is:pr'] if status == 'open': query.append('is:open') elif status == 'closed': query.append('is:unmerged') # Also use "is:closed" otherwise unmerged open pull requests are # also included. query.append('is:closed') elif status == 'merged': query.append('is:merged') query.append('author:%s' % self._current_user['login']) for issue in self._search_issues(query=' '.join(query))['items']: url = issue['pull_request']['url'] response = self._api_request('GET', url) if response.status != 200: raise InvalidHttpResponse(url, response.text) yield GitHubMergeProposal(self, json.loads(response.text)) def get_proposal_by_url(self, url): raise UnsupportedHoster(url) class GitHubMergeProposalBuilder(MergeProposalBuilder): def __init__(self, gh, source_branch, target_branch): self.gh = gh self.source_branch = source_branch self.target_branch = target_branch (self.target_owner, self.target_repo_name, self.target_branch_name) = ( parse_github_branch_url(self.target_branch)) (self.source_owner, self.source_repo_name, self.source_branch_name) = ( parse_github_branch_url(self.source_branch)) def get_infotext(self): """Determine the initial comment for the merge proposal.""" info = [] info.append("Merge %s into %s:%s\n" % ( self.source_branch_name, self.target_owner, self.target_branch_name)) info.append("Source: %s\n" % self.source_branch.user_url) info.append("Target: %s\n" % self.target_branch.user_url) return ''.join(info) def get_initial_body(self): """Get a body for the proposal for the user to modify. :return: a str or None. """ return None def create_proposal(self, description, reviewers=None, labels=None, prerequisite_branch=None, commit_message=None): """Perform the submission.""" if prerequisite_branch is not None: raise PrerequisiteBranchUnsupported(self) # Note that commit_message is ignored, since github doesn't support it. import github # TODO(jelmer): Probe for right repo name if self.target_repo_name.endswith('.git'): self.target_repo_name = self.target_repo_name[:-4] # TODO(jelmer): Allow setting title explicitly? title = determine_title(description) # TODO(jelmer): Set maintainers_can_modify? try: pull_request = self.gh._create_pull( "%s/%s" % (self.target_owner, self.target_repo_name), title=title, body=description, head="%s:%s" % (self.source_owner, self.source_branch_name), base=self.target_branch_name) except ValidationFailed: raise MergeProposalExists(self.source_branch.user_url) if reviewers: for reviewer in reviewers: if '@' in reviewer: user = self.gh._get_user_by_email(reviewer) else: user = self.gh._get_user(reviewer) pull_request.assignees.append(user['login']) if labels: for label in labels: pull_request.issue.labels.append(label) return GitHubMergeProposal(self.gh, pull_request)