/brz/remove-bazaar

# 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

from __future__ import absolute_import

from .propose import (

    Hoster,

    MergeProposal,

    MergeProposalBuilder,

    MergeProposalExists,

    UnsupportedHoster,

    )

from ... import (

    branch as _mod_branch,

    controldir,

    errors,

    hooks,

    urlutils,

    version_string as breezy_version,

    )

from ...config import AuthenticationConfig, GlobalStack

from ...git.urls import git_url_to_bzr_url

from ...i18n import gettext

from ...trace import note

from ...lazy_import import lazy_import

lazy_import(globals(), """

from github import Github

""")

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():

    user_agent = 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): Support using an access token

    #return Github("token", user_agent=user_agent)

    return Github(user_agent=user_agent)

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

class GitHub(Hoster):

    supports_merge_proposal_labels = True

    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):

        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))

        push_result = remote_dir.push_branch(local_branch, revision_id=revision_id,

            overwrite=overwrite, name=name)

        return push_result.target_branch, urlutils.join_segment_parameters(

                remote_repo.html_url, {"branch": name.encode('utf-8')})

    def get_push_url(self, branch):

        owner, project, branch_name = parse_github_url(branch)

        repo = self.gh.get_repo('%s/%s' % (owner, project))

        return urlutils.join_segment_parameters(

            git_url_to_bzr_url(repo.ssh_url), {"branch": branch_name.encode('utf-8')})

    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 = urlutils.join_segment_parameters(

                git_url_to_bzr_url(remote_repo.ssh_url), {"branch": name.encode('utf-8')})

            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)

    @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):

        """Perform the submission."""

        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 = description.splitlines()[0]

        # 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 MergeProposal(pull_request.html_url)