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Viewing changes to bzrlib/plugins/launchpad/lp_api.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2008-09-03 22:30:56 UTC
  • mfrom: (3644.2.13 index_builder_cleanup)
  • Revision ID: pqm@pqm.ubuntu.com-20080903223056-b108iytb38xkznci
(jam) Streamline BTreeBuilder.add_node et al to make btree creation
        faster.

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bzrlib/plugins/launchpad/lp_api.py
1
 
# Copyright (C) 2009-2012 Canonical Ltd
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
 
"""Tools for dealing with the Launchpad API."""
18
 
 
19
 
from __future__ import absolute_import
20
 
 
21
 
# Importing this module will be expensive, since it imports launchpadlib and
22
 
# its dependencies. However, our plan is to only load this module when it is
23
 
# needed by a command that uses it.
24
 
 
25
 
 
26
 
import httplib2
27
 
import os
28
 
import re
29
 
import urlparse
30
 
 
31
 
from bzrlib import (
32
 
    branch,
33
 
    config,
34
 
    errors,
35
 
    osutils,
36
 
    trace,
37
 
    transport,
38
 
    )
39
 
from bzrlib.i18n import gettext
40
 
from bzrlib.plugins.launchpad.lp_registration import (
41
 
    InvalidLaunchpadInstance,
42
 
    )
43
 
 
44
 
try:
45
 
    import launchpadlib
46
 
except ImportError, e:
47
 
    raise errors.DependencyNotPresent('launchpadlib', e)
48
 
 
49
 
from launchpadlib.launchpad import (
50
 
    STAGING_SERVICE_ROOT,
51
 
    Launchpad,
52
 
    )
53
 
from launchpadlib import uris
54
 
 
55
 
# Declare the minimum version of launchpadlib that we need in order to work.
56
 
# 1.6.0 is the version of launchpadlib packaged in Ubuntu 10.04, the most
57
 
# recent Ubuntu LTS release supported on the desktop at the time of writing.
58
 
MINIMUM_LAUNCHPADLIB_VERSION = (1, 6, 0)
59
 
 
60
 
 
61
 
def get_cache_directory():
62
 
    """Return the directory to cache launchpadlib objects in."""
63
 
    return osutils.pathjoin(config.config_dir(), 'launchpad')
64
 
 
65
 
 
66
 
def parse_launchpadlib_version(version_number):
67
 
    """Parse a version number of the style used by launchpadlib."""
68
 
    return tuple(map(int, version_number.split('.')))
69
 
 
70
 
 
71
 
def check_launchpadlib_compatibility():
72
 
    """Raise an error if launchpadlib has the wrong version number."""
73
 
    installed_version = parse_launchpadlib_version(launchpadlib.__version__)
74
 
    if installed_version < MINIMUM_LAUNCHPADLIB_VERSION:
75
 
        raise errors.IncompatibleAPI(
76
 
            'launchpadlib', MINIMUM_LAUNCHPADLIB_VERSION,
77
 
            installed_version, installed_version)
78
 
 
79
 
 
80
 
def lookup_service_root(service_root):
81
 
    try:
82
 
        return uris.lookup_service_root(service_root)
83
 
    except ValueError:
84
 
        if service_root != 'qastaging':
85
 
            raise
86
 
        staging_root = uris.lookup_service_root('staging')
87
 
        return staging_root.replace('staging', 'qastaging')
88
 
 
89
 
 
90
 
def _get_api_url(service):
91
 
    """Return the root URL of the Launchpad API.
92
 
 
93
 
    e.g. For the 'staging' Launchpad service, this function returns
94
 
    launchpadlib.launchpad.STAGING_SERVICE_ROOT.
95
 
 
96
 
    :param service: A `LaunchpadService` object.
97
 
    :return: A URL as a string.
98
 
    """
99
 
    if service._lp_instance is None:
100
 
        lp_instance = service.DEFAULT_INSTANCE
101
 
    else:
102
 
        lp_instance = service._lp_instance
103
 
    try:
104
 
        return lookup_service_root(lp_instance)
105
 
    except ValueError:
106
 
        raise InvalidLaunchpadInstance(lp_instance)
107
 
 
108
 
 
109
 
class NoLaunchpadBranch(errors.BzrError):
110
 
    _fmt = 'No launchpad branch could be found for branch "%(url)s".'
111
 
 
112
 
    def __init__(self, branch):
113
 
        errors.BzrError.__init__(self, branch=branch, url=branch.base)
114
 
 
115
 
 
116
 
def login(service, timeout=None, proxy_info=None,
117
 
          version=Launchpad.DEFAULT_VERSION):
118
 
    """Log in to the Launchpad API.
119
 
 
120
 
    :return: The root `Launchpad` object from launchpadlib.
121
 
    """
122
 
    if proxy_info is None:
123
 
        proxy_info = httplib2.proxy_info_from_environment('https')
124
 
    cache_directory = get_cache_directory()
125
 
    launchpad = Launchpad.login_with(
126
 
        'bzr', _get_api_url(service), cache_directory, timeout=timeout,
127
 
        proxy_info=proxy_info, version=version)
128
 
    # XXX: Work-around a minor security bug in launchpadlib < 1.6.3, which
129
 
    # would create this directory with default umask.
130
 
    osutils.chmod_if_possible(cache_directory, 0700)
131
 
    return launchpad
132
 
 
133
 
 
134
 
class LaunchpadBranch(object):
135
 
    """Provide bzr and lp API access to a Launchpad branch."""
136
 
 
137
 
    def __init__(self, lp_branch, bzr_url, bzr_branch=None, check_update=True):
138
 
        """Constructor.
139
 
 
140
 
        :param lp_branch: The Launchpad branch.
141
 
        :param bzr_url: The URL of the Bazaar branch.
142
 
        :param bzr_branch: An instance of the Bazaar branch.
143
 
        """
144
 
        self.bzr_url = bzr_url
145
 
        self._bzr = bzr_branch
146
 
        self._push_bzr = None
147
 
        self._check_update = check_update
148
 
        self.lp = lp_branch
149
 
 
150
 
    @property
151
 
    def bzr(self):
152
 
        """Return the bzr branch for this branch."""
153
 
        if self._bzr is None:
154
 
            self._bzr = branch.Branch.open(self.bzr_url)
155
 
        return self._bzr
156
 
 
157
 
    @property
158
 
    def push_bzr(self):
159
 
        """Return the push branch for this branch."""
160
 
        if self._push_bzr is None:
161
 
            self._push_bzr = branch.Branch.open(self.lp.bzr_identity)
162
 
        return self._push_bzr
163
 
 
164
 
    @staticmethod
165
 
    def plausible_launchpad_url(url):
166
 
        """Is 'url' something that could conceivably be pushed to LP?
167
 
 
168
 
        :param url: A URL that may refer to a Launchpad branch.
169
 
        :return: A boolean.
170
 
        """
171
 
        if url is None:
172
 
            return False
173
 
        if url.startswith('lp:'):
174
 
            return True
175
 
        regex = re.compile('([a-z]*\+)*(bzr\+ssh|http)'
176
 
                           '://bazaar.*.launchpad.net')
177
 
        return bool(regex.match(url))
178
 
 
179
 
    @staticmethod
180
 
    def candidate_urls(bzr_branch):
181
 
        """Iterate through related URLs that might be Launchpad URLs.
182
 
 
183
 
        :param bzr_branch: A Bazaar branch to find URLs from.
184
 
        :return: a generator of URL strings.
185
 
        """
186
 
        url = bzr_branch.get_public_branch()
187
 
        if url is not None:
188
 
            yield url
189
 
        url = bzr_branch.get_push_location()
190
 
        if url is not None:
191
 
            yield url
192
 
        url = bzr_branch.get_parent()
193
 
        if url is not None:
194
 
            yield url
195
 
        yield bzr_branch.base
196
 
 
197
 
    @staticmethod
198
 
    def tweak_url(url, launchpad):
199
 
        """Adjust a URL to work with staging, if needed."""
200
 
        if str(launchpad._root_uri) == STAGING_SERVICE_ROOT:
201
 
            return url.replace('bazaar.launchpad.net',
202
 
                               'bazaar.staging.launchpad.net')
203
 
        elif str(launchpad._root_uri) == lookup_service_root('qastaging'):
204
 
            return url.replace('bazaar.launchpad.net',
205
 
                               'bazaar.qastaging.launchpad.net')
206
 
        return url
207
 
 
208
 
    @classmethod
209
 
    def from_bzr(cls, launchpad, bzr_branch, create_missing=True):
210
 
        """Find a Launchpad branch from a bzr branch."""
211
 
        check_update = True
212
 
        for url in cls.candidate_urls(bzr_branch):
213
 
            url = cls.tweak_url(url, launchpad)
214
 
            if not cls.plausible_launchpad_url(url):
215
 
                continue
216
 
            lp_branch = launchpad.branches.getByUrl(url=url)
217
 
            if lp_branch is not None:
218
 
                break
219
 
        else:
220
 
            if not create_missing:
221
 
                raise NoLaunchpadBranch(bzr_branch)
222
 
            lp_branch = cls.create_now(launchpad, bzr_branch)
223
 
            check_update = False
224
 
        return cls(lp_branch, bzr_branch.base, bzr_branch, check_update)
225
 
 
226
 
    @classmethod
227
 
    def create_now(cls, launchpad, bzr_branch):
228
 
        """Create a Bazaar branch on Launchpad for the supplied branch."""
229
 
        url = cls.tweak_url(bzr_branch.get_push_location(), launchpad)
230
 
        if not cls.plausible_launchpad_url(url):
231
 
            raise errors.BzrError(gettext('%s is not registered on Launchpad') %
232
 
                                  bzr_branch.base)
233
 
        bzr_branch.create_clone_on_transport(transport.get_transport(url))
234
 
        lp_branch = launchpad.branches.getByUrl(url=url)
235
 
        if lp_branch is None:
236
 
            raise errors.BzrError(gettext('%s is not registered on Launchpad') %
237
 
                                                                            url)
238
 
        return lp_branch
239
 
 
240
 
    def get_target(self):
241
 
        """Return the 'LaunchpadBranch' for the target of this one."""
242
 
        lp_branch = self.lp
243
 
        if lp_branch.project is not None:
244
 
            dev_focus = lp_branch.project.development_focus
245
 
            if dev_focus is None:
246
 
                raise errors.BzrError(gettext('%s has no development focus.') %
247
 
                                  lp_branch.bzr_identity)
248
 
            target = dev_focus.branch
249
 
            if target is None:
250
 
                raise errors.BzrError(gettext(
251
 
                        'development focus %s has no branch.') % dev_focus)
252
 
        elif lp_branch.sourcepackage is not None:
253
 
            target = lp_branch.sourcepackage.getBranch(pocket="Release")
254
 
            if target is None:
255
 
                raise errors.BzrError(gettext(
256
 
                                      'source package %s has no branch.') %
257
 
                                      lp_branch.sourcepackage)
258
 
        else:
259
 
            raise errors.BzrError(gettext(
260
 
                        '%s has no associated product or source package.') %
261
 
                                  lp_branch.bzr_identity)
262
 
        return LaunchpadBranch(target, target.bzr_identity)
263
 
 
264
 
    def update_lp(self):
265
 
        """Update the Launchpad copy of this branch."""
266
 
        if not self._check_update:
267
 
            return
268
 
        self.bzr.lock_read()
269
 
        try:
270
 
            if self.lp.last_scanned_id is not None:
271
 
                if self.bzr.last_revision() == self.lp.last_scanned_id:
272
 
                    trace.note(gettext('%s is already up-to-date.') %
273
 
                               self.lp.bzr_identity)
274
 
                    return
275
 
                graph = self.bzr.repository.get_graph()
276
 
                if not graph.is_ancestor(self.lp.last_scanned_id,
277
 
                                         self.bzr.last_revision()):
278
 
                    raise errors.DivergedBranches(self.bzr, self.push_bzr)
279
 
                trace.note(gettext('Pushing to %s') % self.lp.bzr_identity)
280
 
            self.bzr.push(self.push_bzr)
281
 
        finally:
282
 
            self.bzr.unlock()
283
 
 
284
 
    def find_lca_tree(self, other):
285
 
        """Find the revision tree for the LCA of this branch and other.
286
 
 
287
 
        :param other: Another LaunchpadBranch
288
 
        :return: The RevisionTree of the LCA of this branch and other.
289
 
        """
290
 
        graph = self.bzr.repository.get_graph(other.bzr.repository)
291
 
        lca = graph.find_unique_lca(self.bzr.last_revision(),
292
 
                                    other.bzr.last_revision())
293
 
        return self.bzr.repository.revision_tree(lca)
294
 
 
295
 
 
296
 
def canonical_url(object):
297
 
    """Return the canonical URL for a branch."""
298
 
    scheme, netloc, path, params, query, fragment = urlparse.urlparse(
299
 
        str(object.self_link))
300
 
    path = '/'.join(path.split('/')[2:])
301
 
    netloc = netloc.replace('api.', 'code.')
302
 
    return urlparse.urlunparse((scheme, netloc, path, params, query,
303
 
                                fragment))