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# 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 os
from .propose import (
Hoster,
MergeProposal,
MergeProposalBuilder,
MergeProposalExists,
NoMergeProposal,
PrerequisiteBranchUnsupported,
UnsupportedHoster,
)
from ... import (
branch as _mod_branch,
controldir,
errors,
hooks,
urlutils,
version_string as breezy_version,
)
from ...config import AuthenticationConfig, GlobalStack, config_dir
from ...git.urls import git_url_to_bzr_url
from ...i18n import gettext
from ...sixish import PY3
from ...trace import note
from ...lazy_import import lazy_import
lazy_import(globals(), """
from github import Github
""")
def store_github_token(scheme, host, token):
with open(os.path.join(config_dir(), 'github.conf'), 'w') as f:
f.write(token)
def retrieve_github_token(scheme, host):
path = os.path.join(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 NotGitHubUrl(errors.BzrError):
_fmt = "Not a GitHub URL: %(url)s"
def __init__(self, url):
errors.BzrError.__init__(self)
self.url = url
def connect_github():
"""Connect to GitHub.
"""
user_agent = "Breezy/%s" % breezy_version
auth = AuthenticationConfig()
credentials = auth.get_credentials('https', 'github.com')
if credentials is not None:
return Github(credentials['user'], credentials['password'],
user_agent=user_agent)
# TODO(jelmer): token = auth.get_token('https', 'github.com')
token = retrieve_github_token('https', 'github.com')
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, pr):
self._pr = pr
@property
def url(self):
return self._pr.html_url
def get_description(self):
return self._pr.body
def set_description(self, description):
self._pr.edit(body=description, title=determine_title(description))
def is_merged(self):
return self._pr.merged
def parse_github_url(branch):
url = urlutils.split_segment_parameters(branch.user_url)[0]
(scheme, user, password, host, port, path) = urlutils.parse_url(
url)
if host != 'github.com':
raise NotGitHubUrl(url)
(owner, repo_name) = path.strip('/').split('/')
if repo_name.endswith('.git'):
repo_name = repo_name[:-4]
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):
supports_merge_proposal_labels = True
def __repr__(self):
return "GitHub()"
def __init__(self):
self.gh = connect_github()
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_url(base_branch)
base_repo = self.gh.get_repo('%s/%s' % (base_owner, base_project))
if owner is None:
owner = self.gh.get_user().login
if project is None:
project = base_repo.name
try:
remote_repo = self.gh.get_repo('%s/%s' % (owner, project))
remote_repo.id
except github.UnknownObjectException:
base_repo = self.gh.get_repo('%s/%s' % (base_owner, base_project))
if owner == self.gh.get_user().login:
owner_obj = self.gh.get_user()
else:
owner_obj = self.gh.get_organization(owner)
remote_repo = owner_obj.create_fork(base_repo)
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_url(branch)
repo = self.gh.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_url(base_branch)
base_repo = self.gh.get_repo('%s/%s' % (base_owner, base_project))
if owner is None:
owner = self.gh.get_user().login
if project is None:
project = base_repo.name
try:
remote_repo = self.gh.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('https://github.com/%s/%s' % (owner, project))
def get_proposer(self, source_branch, target_branch):
return GitHubMergeProposalBuilder(self.gh, source_branch, target_branch)
def get_proposal(self, source_branch, target_branch):
(source_owner, source_repo_name, source_branch_name) = (
parse_github_url(source_branch))
(target_owner, target_repo_name, target_branch_name) = (
parse_github_url(target_branch))
target_repo = self.gh.get_repo("%s/%s" % (target_owner, target_repo_name))
for pull in target_repo.get_pulls(head=target_branch_name):
if pull.head.ref != source_branch_name:
continue
if (pull.head.repo.owner.login != source_owner or
pull.head.repo.name != source_repo_name):
continue
return GitHubMergeProposal(pull)
raise NoMergeProposal()
def hosts(self, branch):
try:
parse_github_url(branch)
except NotGitHubUrl:
return False
else:
return True
@classmethod
def probe(cls, branch):
try:
parse_github_url(branch)
except NotGitHubUrl:
raise UnsupportedHoster(branch)
return cls()
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_url(self.target_branch))
(self.source_owner, self.source_repo_name, self.source_branch_name) = (
parse_github_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):
"""Perform the submission."""
if prerequisite_branch is not None:
raise PrerequisiteBranchUnsupported(self)
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]
target_repo = self.gh.get_repo("%s/%s" % (self.target_owner, self.target_repo_name))
# TODO(jelmer): Allow setting title explicitly?
title = determine_title(description)
# TOOD(jelmer): Set maintainers_can_modify?
try:
pull_request = target_repo.create_pull(
title=title, body=description,
head="%s:%s" % (self.source_owner, self.source_branch_name),
base=self.target_branch_name)
except github.GithubException as e:
if e.status == 422:
raise MergeProposalExists(self.source_branch.user_url)
raise
if reviewers:
for reviewer in reviewers:
pull_request.assignees.append(
self.gh.get_user(reviewer))
if labels:
for label in labels:
pull_request.issue.labels.append(label)
return GitHubMergeProposal(pull_request)
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