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Viewing changes to breezy/plugins/launchpad/lp_propose.py

  • Committer: Jelmer Vernooij
  • Date: 2020-03-22 01:35:14 UTC
  • mfrom: (7490.7.6 work)
  • mto: This revision was merged to the branch mainline in revision 7499.
  • Revision ID: jelmer@jelmer.uk-20200322013514-7vw1ntwho04rcuj3
merge lp:brz/3.1.

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breezy/plugins/launchpad/lp_propose.py
 
1
# Copyright (C) 2010, 2011 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
12
#
 
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# 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
from ... import (
 
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    errors,
 
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    hooks,
 
20
    )
 
21
from ...lazy_import import lazy_import
 
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lazy_import(globals(), """
 
23
import webbrowser
 
24
 
 
25
from breezy import (
 
26
    msgeditor,
 
27
    )
 
28
from breezy.i18n import gettext
 
29
from breezy.plugins.launchpad import (
 
30
    lp_api,
 
31
    )
 
32
""")
 
33
 
 
34
 
 
35
class ProposeMergeHooks(hooks.Hooks):
 
36
    """Hooks for proposing a merge on Launchpad."""
 
37
 
 
38
    def __init__(self):
 
39
        hooks.Hooks.__init__(self, "breezy.plugins.launchpad.lp_propose",
 
40
                             "Proposer.hooks")
 
41
        self.add_hook('get_prerequisite',
 
42
                      "Return the prerequisite branch for proposing as merge.", (2, 1))
 
43
        self.add_hook('merge_proposal_body',
 
44
                      "Return an initial body for the merge proposal message.", (2, 1))
 
45
 
 
46
 
 
47
class Proposer(object):
 
48
 
 
49
    hooks = ProposeMergeHooks()
 
50
 
 
51
    def __init__(self, tree, source_branch, target_branch, message, reviews,
 
52
                 staging=False, approve=False, fixes=None):
 
53
        """Constructor.
 
54
 
 
55
        :param tree: The working tree for the source branch.
 
56
        :param source_branch: The branch to propose for merging.
 
57
        :param target_branch: The branch to merge into.
 
58
        :param message: The commit message to use.  (May be None.)
 
59
        :param reviews: A list of tuples of reviewer, review type.
 
60
        :param staging: If True, propose the merge against staging instead of
 
61
            production.
 
62
        :param approve: If True, mark the new proposal as approved immediately.
 
63
            This is useful when a project permits some things to be approved
 
64
            by the submitter (e.g. merges between release and deployment
 
65
            branches).
 
66
        """
 
67
        self.tree = tree
 
68
        if staging:
 
69
            lp_base_url = lp_api.uris.STAGING_SERVICE_ROOT
 
70
        else:
 
71
            lp_base_url = lp_api.uris.LPNET_SERVICE_ROOT
 
72
        self.launchpad = lp_api.connect_launchpad(lp_base_url)
 
73
        self.source_branch = lp_api.LaunchpadBranch.from_bzr(
 
74
            self.launchpad, source_branch)
 
75
        if target_branch is None:
 
76
            self.target_branch = self.source_branch.get_target()
 
77
        else:
 
78
            self.target_branch = lp_api.LaunchpadBranch.from_bzr(
 
79
                self.launchpad, target_branch)
 
80
        self.commit_message = message
 
81
        # XXX: this is where bug lp:583638 could be tackled.
 
82
        if reviews == []:
 
83
            self.reviews = []
 
84
        else:
 
85
            self.reviews = [(self.launchpad.people[reviewer], review_type)
 
86
                            for reviewer, review_type in
 
87
                            reviews]
 
88
        self.approve = approve
 
89
        self.fixes = fixes
 
90
 
 
91
    def get_comment(self, prerequisite_branch):
 
92
        """Determine the initial comment for the merge proposal."""
 
93
        if self.commit_message is not None:
 
94
            return self.commit_message.strip().encode('utf-8')
 
95
        info = ["Source: %s\n" % self.source_branch.lp.bzr_identity]
 
96
        info.append("Target: %s\n" % self.target_branch.lp.bzr_identity)
 
97
        if prerequisite_branch is not None:
 
98
            info.append("Prereq: %s\n" % prerequisite_branch.lp.bzr_identity)
 
99
        for rdata in self.reviews:
 
100
            uniquename = "%s (%s)" % (rdata[0].display_name, rdata[0].name)
 
101
            info.append('Reviewer: %s, type "%s"\n' % (uniquename, rdata[1]))
 
102
        with self.source_branch.bzr.lock_read(), \
 
103
                self.target_branch.bzr.lock_read():
 
104
            body = self.get_initial_body()
 
105
        initial_comment = msgeditor.edit_commit_message(''.join(info),
 
106
                                                        start_message=body)
 
107
        return initial_comment.strip().encode('utf-8')
 
108
 
 
109
    def get_initial_body(self):
 
110
        """Get a body for the proposal for the user to modify.
 
111
 
 
112
        :return: a str or None.
 
113
        """
 
114
        def list_modified_files():
 
115
            lca_tree = self.source_branch.find_lca_tree(
 
116
                self.target_branch)
 
117
            source_tree = self.source_branch.bzr.basis_tree()
 
118
            files = modified_files(lca_tree, source_tree)
 
119
            return list(files)
 
120
        target_loc = ('bzr+ssh://bazaar.launchpad.net/%s' %
 
121
                      self.target_branch.lp.unique_name)
 
122
        body = None
 
123
        for hook in self.hooks['merge_proposal_body']:
 
124
            body = hook({
 
125
                'tree': self.tree,
 
126
                'target_branch': target_loc,
 
127
                'modified_files_callback': list_modified_files,
 
128
                'old_body': body,
 
129
            })
 
130
        return body
 
131
 
 
132
    def get_source_revid(self):
 
133
        """Get the revision ID of the source branch."""
 
134
        source_branch = self.source_branch.bzr
 
135
        with source_branch.lock_read():
 
136
            return source_branch.last_revision()
 
137
 
 
138
    def check_proposal(self):
 
139
        """Check that the submission is sensible."""
 
140
        if self.source_branch.lp.self_link == self.target_branch.lp.self_link:
 
141
            raise errors.BzrCommandError(
 
142
                'Source and target branches must be different.')
 
143
        for mp in self.source_branch.lp.landing_targets:
 
144
            if mp.queue_status in ('Merged', 'Rejected'):
 
145
                continue
 
146
            if mp.target_branch.self_link == self.target_branch.lp.self_link:
 
147
                raise errors.BzrCommandError(gettext(
 
148
                    'There is already a branch merge proposal: %s') %
 
149
                    lp_api.canonical_url(mp))
 
150
 
 
151
    def _get_prerequisite_branch(self):
 
152
        hooks = self.hooks['get_prerequisite']
 
153
        prerequisite_branch = None
 
154
        for hook in hooks:
 
155
            prerequisite_branch = hook(
 
156
                {'launchpad': self.launchpad,
 
157
                 'source_branch': self.source_branch,
 
158
                 'target_branch': self.target_branch,
 
159
                 'prerequisite_branch': prerequisite_branch})
 
160
        return prerequisite_branch
 
161
 
 
162
    def call_webservice(self, call, *args, **kwargs):
 
163
        """Make a call to the webservice, wrapping failures.
 
164
 
 
165
        :param call: The call to make.
 
166
        :param *args: *args for the call.
 
167
        :param **kwargs: **kwargs for the call.
 
168
        :return: The result of calling call(*args, *kwargs).
 
169
        """
 
170
        from lazr.restfulclient import errors as restful_errors
 
171
        try:
 
172
            return call(*args, **kwargs)
 
173
        except restful_errors.HTTPError as e:
 
174
            error_lines = []
 
175
            for line in e.content.splitlines():
 
176
                if line.startswith('Traceback (most recent call last):'):
 
177
                    break
 
178
                error_lines.append(line)
 
179
            raise Exception(''.join(error_lines))
 
180
 
 
181
    def approve_proposal(self, mp):
 
182
        revid = self.get_source_revid()
 
183
        self.call_webservice(
 
184
            mp.createComment,
 
185
            vote=u'Approve',
 
186
            subject='',  # Use the default subject.
 
187
            content=u"Rubberstamp! Proposer approves of own proposal.")
 
188
        self.call_webservice(mp.setStatus, status=u'Approved', revid=revid)
 
189
 
 
190
    def create_proposal(self):
 
191
        """Perform the submission."""
 
192
        prerequisite_branch = self._get_prerequisite_branch()
 
193
        if prerequisite_branch is None:
 
194
            prereq = None
 
195
        else:
 
196
            prereq = prerequisite_branch.lp
 
197
            prerequisite_branch.update_lp()
 
198
        self.source_branch.update_lp()
 
199
        reviewers = []
 
200
        review_types = []
 
201
        for reviewer, review_type in self.reviews:
 
202
            review_types.append(review_type)
 
203
            reviewers.append(reviewer.self_link)
 
204
        initial_comment = self.get_comment(prerequisite_branch)
 
205
        mp = self.call_webservice(
 
206
            self.source_branch.lp.createMergeProposal,
 
207
            target_branch=self.target_branch.lp,
 
208
            prerequisite_branch=prereq,
 
209
            initial_comment=initial_comment,
 
210
            commit_message=self.commit_message, reviewers=reviewers,
 
211
            review_types=review_types)
 
212
        if self.approve:
 
213
            self.approve_proposal(mp)
 
214
        if self.fixes:
 
215
            if self.fixes.startswith('lp:'):
 
216
                self.fixes = self.fixes[3:]
 
217
            self.call_webservice(
 
218
                self.source_branch.lp.linkBug,
 
219
                bug=self.launchpad.bugs[int(self.fixes)])
 
220
        webbrowser.open(lp_api.canonical_url(mp))
 
221
 
 
222
 
 
223
def modified_files(old_tree, new_tree):
 
224
    """Return a list of paths in the new tree with modified contents."""
 
225
    for change in new_tree.iter_changes(old_tree):
 
226
        if change.changed_content and change.kind[1] == 'file':
 
227
            yield str(path)