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Viewing changes to breezy/plugins/propose/github.py

  • Committer: Jelmer Vernooij
  • Date: 2019-06-16 15:54:33 UTC
  • mto: This revision was merged to the branch mainline in revision 7347.
  • Revision ID: jelmer@jelmer.uk-20190616155433-bkjxtcejurscyjbu
Use assertIn.

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breezy/plugins/propose/github.py
 
1
# Copyright (C) 2018 Breezy Developers
 
2
#
 
3
# This program is free software; you can redistribute it and/or modify
 
4
# it under the terms of the GNU General Public License as published by
 
5
# the Free Software Foundation; either version 2 of the License, or
 
6
# (at your option) any later version.
 
7
#
 
8
# This program is distributed in the hope that it will be useful,
 
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
11
# GNU General Public License for more details.
 
12
#
 
13
# You should have received a copy of the GNU General Public License
 
14
# along with this program; if not, write to the Free Software
 
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
"""Support for GitHub."""
 
18
 
 
19
from __future__ import absolute_import
 
20
 
 
21
import os
 
22
 
 
23
from .propose import (
 
24
    Hoster,
 
25
    HosterLoginRequired,
 
26
    MergeProposal,
 
27
    MergeProposalBuilder,
 
28
    MergeProposalExists,
 
29
    NoSuchProject,
 
30
    PrerequisiteBranchUnsupported,
 
31
    UnsupportedHoster,
 
32
    )
 
33
 
 
34
from ... import (
 
35
    branch as _mod_branch,
 
36
    controldir,
 
37
    errors,
 
38
    hooks,
 
39
    urlutils,
 
40
    version_string as breezy_version,
 
41
    )
 
42
from ...config import AuthenticationConfig, GlobalStack, config_dir
 
43
from ...errors import InvalidHttpResponse
 
44
from ...git.urls import git_url_to_bzr_url
 
45
from ...i18n import gettext
 
46
from ...sixish import PY3
 
47
from ...trace import note
 
48
from ...transport import get_transport
 
49
from ...transport.http import default_user_agent
 
50
 
 
51
 
 
52
GITHUB_HOST = 'github.com'
 
53
WEB_GITHUB_URL = 'https://github.com'
 
54
API_GITHUB_URL = 'https://api.github.com'
 
55
 
 
56
 
 
57
def store_github_token(scheme, host, token):
 
58
    with open(os.path.join(config_dir(), 'github.conf'), 'w') as f:
 
59
        f.write(token)
 
60
 
 
61
 
 
62
def retrieve_github_token(scheme, host):
 
63
    path = os.path.join(config_dir(), 'github.conf')
 
64
    if not os.path.exists(path):
 
65
        return None
 
66
    with open(path, 'r') as f:
 
67
        return f.read().strip()
 
68
 
 
69
 
 
70
def determine_title(description):
 
71
    return description.splitlines()[0]
 
72
 
 
73
 
 
74
class NotGitHubUrl(errors.BzrError):
 
75
 
 
76
    _fmt = "Not a GitHub URL: %(url)s"
 
77
 
 
78
    def __init__(self, url):
 
79
        errors.BzrError.__init__(self)
 
80
        self.url = url
 
81
 
 
82
 
 
83
class GitHubLoginRequired(HosterLoginRequired):
 
84
 
 
85
    _fmt = "Action requires GitHub login."
 
86
 
 
87
 
 
88
def connect_github():
 
89
    """Connect to GitHub.
 
90
    """
 
91
    user_agent = default_user_agent()
 
92
    auth = AuthenticationConfig()
 
93
 
 
94
    credentials = auth.get_credentials('https', GITHUB_HOST)
 
95
    if credentials is not None:
 
96
        return Github(credentials['user'], credentials['password'],
 
97
                      user_agent=user_agent)
 
98
 
 
99
    # TODO(jelmer): token = auth.get_token('https', GITHUB_HOST)
 
100
    if token is not None:
 
101
        return Github(token, user_agent=user_agent)
 
102
    else:
 
103
        note('Accessing GitHub anonymously. To log in, run \'brz gh-login\'.')
 
104
        return Github(user_agent=user_agent)
 
105
 
 
106
 
 
107
class GitHubMergeProposal(MergeProposal):
 
108
 
 
109
    def __init__(self, pr):
 
110
        self._pr = pr
 
111
 
 
112
    @property
 
113
    def url(self):
 
114
        return self._pr['html_url']
 
115
 
 
116
    def _branch_from_part(self, part):
 
117
        return github_url_to_bzr_url(part['repo']['html_url'], part['ref'])
 
118
 
 
119
    def get_source_branch_url(self):
 
120
        return self._branch_from_part(self._pr['head'])
 
121
 
 
122
    def get_target_branch_url(self):
 
123
        return self._branch_from_part(self._pr['base'])
 
124
 
 
125
    def get_description(self):
 
126
        return self._pr['body']
 
127
 
 
128
    def get_commit_message(self):
 
129
        return None
 
130
 
 
131
    def set_description(self, description):
 
132
        self._pr.edit(body=description, title=determine_title(description))
 
133
 
 
134
    def is_merged(self):
 
135
        return self._pr['merged']
 
136
 
 
137
    def close(self):
 
138
        self._pr.edit(state='closed')
 
139
 
 
140
    def merge(self, commit_message=None):
 
141
        # https://developer.github.com/v3/pulls/#merge-a-pull-request-merge-button
 
142
        self._pr.merge(commit_message=commit_message)
 
143
 
 
144
 
 
145
def parse_github_url(url):
 
146
    (scheme, user, password, host, port, path) = urlutils.parse_url(
 
147
        url)
 
148
    if host != GITHUB_HOST:
 
149
        raise NotGitHubUrl(url)
 
150
    (owner, repo_name) = path.strip('/').split('/')
 
151
    if repo_name.endswith('.git'):
 
152
        repo_name = repo_name[:-4]
 
153
    return owner, repo_name
 
154
 
 
155
 
 
156
def parse_github_branch_url(branch):
 
157
    url = urlutils.split_segment_parameters(branch.user_url)[0]
 
158
    owner, repo_name = parse_github_url(url)
 
159
    return owner, repo_name, branch.name
 
160
 
 
161
 
 
162
def github_url_to_bzr_url(url, branch_name):
 
163
    if not PY3:
 
164
        branch_name = branch_name.encode('utf-8')
 
165
    return urlutils.join_segment_parameters(
 
166
        git_url_to_bzr_url(url), {"branch": branch_name})
 
167
 
 
168
 
 
169
class GitHub(Hoster):
 
170
 
 
171
    name = 'github'
 
172
 
 
173
    supports_merge_proposal_labels = True
 
174
    supports_merge_proposal_commit_message = False
 
175
 
 
176
    def __repr__(self):
 
177
        return "GitHub()"
 
178
 
 
179
    def _api_request(self, method, path):
 
180
        headers = {
 
181
            'Accept': 'application/vnd.github.v3+json'}
 
182
        if self._token:
 
183
            headers['Authorization'] = 'token %s' % self._token
 
184
        response = self.transport.request(
 
185
            method, urlutils.join(self.transport.base, path),
 
186
            headers=headers)
 
187
        if response.status == 401:
 
188
            raise GitHubLoginRequired(self)
 
189
        return response
 
190
 
 
191
    def _get_repo(self, path):
 
192
        path = 'repos/' + path
 
193
        response = self._api_request('GET', path)
 
194
        if response.status == 404:
 
195
            raise NoSuchProject(path)
 
196
        if response.status == 200:
 
197
            return response.json
 
198
        raise InvalidHttpResponse(path, response.text)
 
199
 
 
200
    def _get_user(self, username=None):
 
201
        if username:
 
202
            path = 'users/:%s' % username
 
203
        else:
 
204
            path = 'user'
 
205
        response = self._api_request('GET', path)
 
206
        if response.status != 200:
 
207
            raise InvalidHttpResponse(path, response.text)
 
208
        return response.json
 
209
 
 
210
    def _get_organization(self, name):
 
211
        path = 'orgs/:%s' % name
 
212
        response = self._api_request('GET', path)
 
213
        if response.status != 200:
 
214
            raise InvalidHttpResponse(path, response.text)
 
215
        return response.json
 
216
 
 
217
    def _search_issues(self, query):
 
218
        path = 'search/issues'
 
219
        response = self._api_request(
 
220
            'GET', path + '?q=' + urlutils.quote(query))
 
221
        if response.status != 200:
 
222
            raise InvalidHttpResponse(path, response.text)
 
223
        return response.json
 
224
 
 
225
    def _create_fork(self, repo, owner=None):
 
226
        (orig_owner, orig_repo) = repo.split('/')
 
227
        path = '/repos/:%s/:%s/forks' % (orig_owner, orig_repo)
 
228
        if owner:
 
229
            path += '?organization=%s' % owner
 
230
        response = self._api_request('POST', path)
 
231
        if response != 202:
 
232
            raise InvalidHttpResponse(path, response.text)
 
233
        return response.json
 
234
 
 
235
    @property
 
236
    def base_url(self):
 
237
        return WEB_GITHUB_URL
 
238
 
 
239
    def __init__(self, transport):
 
240
        self._token = retrieve_github_token('https', GITHUB_HOST)
 
241
        self.transport = transport
 
242
        self._current_user = self._get_user()
 
243
 
 
244
    def publish_derived(self, local_branch, base_branch, name, project=None,
 
245
                        owner=None, revision_id=None, overwrite=False,
 
246
                        allow_lossy=True):
 
247
        import github
 
248
        base_owner, base_project, base_branch_name = parse_github_branch_url(base_branch)
 
249
        base_repo = self._get_repo('%s/%s' % (base_owner, base_project))
 
250
        if owner is None:
 
251
            owner = self._current_user['login']
 
252
        if project is None:
 
253
            project = base_repo['name']
 
254
        try:
 
255
            remote_repo = self._get_repo('%s/%s' % (owner, project))
 
256
        except github.UnknownObjectException:
 
257
            base_repo = self._get_repo('%s/%s' % (base_owner, base_project))
 
258
            remote_repo = self._create_fork(base_repo, owner)
 
259
            note(gettext('Forking new repository %s from %s') %
 
260
                 (remote_repo['html_url'], base_repo['html_url']))
 
261
        else:
 
262
            note(gettext('Reusing existing repository %s') % remote_repo['html_url'])
 
263
        remote_dir = controldir.ControlDir.open(git_url_to_bzr_url(remote_repo['ssh_url']))
 
264
        try:
 
265
            push_result = remote_dir.push_branch(
 
266
                local_branch, revision_id=revision_id, overwrite=overwrite,
 
267
                name=name)
 
268
        except errors.NoRoundtrippingSupport:
 
269
            if not allow_lossy:
 
270
                raise
 
271
            push_result = remote_dir.push_branch(
 
272
                local_branch, revision_id=revision_id,
 
273
                overwrite=overwrite, name=name, lossy=True)
 
274
        return push_result.target_branch, github_url_to_bzr_url(
 
275
            remote_repo['html_url'], name)
 
276
 
 
277
    def get_push_url(self, branch):
 
278
        owner, project, branch_name = parse_github_branch_url(branch)
 
279
        repo = self._get_repo('%s/%s' % (owner, project))
 
280
        return github_url_to_bzr_url(repo['ssh_url'], branch_name)
 
281
 
 
282
    def get_derived_branch(self, base_branch, name, project=None, owner=None):
 
283
        import github
 
284
        base_owner, base_project, base_branch_name = parse_github_branch_url(base_branch)
 
285
        base_repo = self._get_repo('%s/%s' % (base_owner, base_project))
 
286
        if owner is None:
 
287
            owner = self._current_user['login']
 
288
        if project is None:
 
289
            project = base_repo['name']
 
290
        try:
 
291
            remote_repo = self._get_repo('%s/%s' % (owner, project))
 
292
            full_url = github_url_to_bzr_url(remote_repo['ssh_url'], name)
 
293
            return _mod_branch.Branch.open(full_url)
 
294
        except github.UnknownObjectException:
 
295
            raise errors.NotBranchError('%s/%s/%s' % (WEB_GITHUB_URL, owner, project))
 
296
 
 
297
    def get_proposer(self, source_branch, target_branch):
 
298
        return GitHubMergeProposalBuilder(self, source_branch, target_branch)
 
299
 
 
300
    def iter_proposals(self, source_branch, target_branch, status='open'):
 
301
        (source_owner, source_repo_name, source_branch_name) = (
 
302
            parse_github_branch_url(source_branch))
 
303
        (target_owner, target_repo_name, target_branch_name) = (
 
304
            parse_github_branch_url(target_branch))
 
305
        target_repo = self._get_repo(
 
306
            "%s/%s" % (target_owner, target_repo_name))
 
307
        state = {
 
308
            'open': 'open',
 
309
            'merged': 'closed',
 
310
            'closed': 'closed',
 
311
            'all': 'all'}
 
312
        for pull in target_repo.get_pulls(
 
313
                head=target_branch_name,
 
314
                state=state[status]):
 
315
            if (status == 'closed' and pull.merged or
 
316
                    status == 'merged' and not pull.merged):
 
317
                continue
 
318
            if pull.head.ref != source_branch_name:
 
319
                continue
 
320
            if pull.head.repo is None:
 
321
                # Repo has gone the way of the dodo
 
322
                continue
 
323
            if (pull.head.repo.owner.login != source_owner or
 
324
                    pull.head.repo.name != source_repo_name):
 
325
                continue
 
326
            yield GitHubMergeProposal(pull)
 
327
 
 
328
    def hosts(self, branch):
 
329
        try:
 
330
            parse_github_branch_url(branch)
 
331
        except NotGitHubUrl:
 
332
            return False
 
333
        else:
 
334
            return True
 
335
 
 
336
    @classmethod
 
337
    def probe_from_url(cls, url, possible_transports=None):
 
338
        try:
 
339
            parse_github_url(url)
 
340
        except NotGitHubUrl:
 
341
            raise UnsupportedHoster(url)
 
342
        transport = get_transport(
 
343
            API_GITHUB_URL, possible_transports=possible_transports)
 
344
        return cls(transport)
 
345
 
 
346
    @classmethod
 
347
    def iter_instances(cls):
 
348
        yield cls(get_transport(API_GITHUB_URL))
 
349
 
 
350
    def iter_my_proposals(self, status='open'):
 
351
        query = ['is:pr']
 
352
        if status == 'open':
 
353
            query.append('is:open')
 
354
        elif status == 'closed':
 
355
            query.append('is:unmerged')
 
356
            # Also use "is:closed" otherwise unmerged open pull requests are
 
357
            # also included.
 
358
            query.append('is:closed')
 
359
        elif status == 'merged':
 
360
            query.append('is:merged')
 
361
        query.append('author:%s' % self._current_user['login'])
 
362
        for issue in self._search_issues(query=' '.join(query))['items']:
 
363
            yield GitHubMergeProposal(
 
364
                self.transport.request('GET', issue['pull_request']['url']).json)
 
365
 
 
366
    @convert_github_error
 
367
    def get_proposal_by_url(self, url):
 
368
        raise UnsupportedHoster(url)
 
369
 
 
370
 
 
371
class GitHubMergeProposalBuilder(MergeProposalBuilder):
 
372
 
 
373
    def __init__(self, gh, source_branch, target_branch):
 
374
        self.gh = gh
 
375
        self.source_branch = source_branch
 
376
        self.target_branch = target_branch
 
377
        (self.target_owner, self.target_repo_name, self.target_branch_name) = (
 
378
            parse_github_branch_url(self.target_branch))
 
379
        (self.source_owner, self.source_repo_name, self.source_branch_name) = (
 
380
            parse_github_branch_url(self.source_branch))
 
381
 
 
382
    def get_infotext(self):
 
383
        """Determine the initial comment for the merge proposal."""
 
384
        info = []
 
385
        info.append("Merge %s into %s:%s\n" % (
 
386
            self.source_branch_name, self.target_owner,
 
387
            self.target_branch_name))
 
388
        info.append("Source: %s\n" % self.source_branch.user_url)
 
389
        info.append("Target: %s\n" % self.target_branch.user_url)
 
390
        return ''.join(info)
 
391
 
 
392
    def get_initial_body(self):
 
393
        """Get a body for the proposal for the user to modify.
 
394
 
 
395
        :return: a str or None.
 
396
        """
 
397
        return None
 
398
 
 
399
    def create_proposal(self, description, reviewers=None, labels=None,
 
400
                        prerequisite_branch=None, commit_message=None):
 
401
        """Perform the submission."""
 
402
        if prerequisite_branch is not None:
 
403
            raise PrerequisiteBranchUnsupported(self)
 
404
        # Note that commit_message is ignored, since github doesn't support it.
 
405
        import github
 
406
        # TODO(jelmer): Probe for right repo name
 
407
        if self.target_repo_name.endswith('.git'):
 
408
            self.target_repo_name = self.target_repo_name[:-4]
 
409
        target_repo = self.gh._get_repo("%s/%s" % (self.target_owner, self.target_repo_name))
 
410
        # TODO(jelmer): Allow setting title explicitly?
 
411
        title = determine_title(description)
 
412
        # TOOD(jelmer): Set maintainers_can_modify?
 
413
        try:
 
414
            pull_request = target_repo.create_pull(
 
415
                title=title, body=description,
 
416
                head="%s:%s" % (self.source_owner, self.source_branch_name),
 
417
                base=self.target_branch_name)
 
418
        except github.GithubException as e:
 
419
            if e.status == 422:
 
420
                raise MergeProposalExists(self.source_branch.user_url)
 
421
            raise
 
422
        if reviewers:
 
423
            for reviewer in reviewers:
 
424
                pull_request.assignees.append(
 
425
                    self.gh._get_user(reviewer)['login'])
 
426
        if labels:
 
427
            for label in labels:
 
428
                pull_request.issue.labels.append(label)
 
429
        return GitHubMergeProposal(pull_request)