3
# Copyright (C) 2005 Canonical Ltd
5
# This program is free software; you can redistribute it and/or modify
6
# it under the terms of the GNU General Public License as published by
7
# the Free Software Foundation; either version 2 of the License, or
8
# (at your option) any later version.
10
# This program is distributed in the hope that it will be useful,
11
# but WITHOUT ANY WARRANTY; without even the implied warranty of
12
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
# GNU General Public License for more details.
15
# You should have received a copy of the GNU General Public License
16
# along with this program; if not, write to the Free Software
17
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20
"""Proxy object for access to remote branches.
22
At the moment remote branches are only for HTTP and only for read
28
from cStringIO import StringIO
31
from errors import BzrError, BzrCheckError
32
from branch import Branch, BZR_BRANCH_FORMAT
33
from trace import mutter
35
# velocitynet.com.au transparently proxies connections and thereby
36
# breaks keep-alive -- sucks!
39
ENABLE_URLGRABBER = True
44
import urlgrabber.keepalive
45
urlgrabber.keepalive.DEBUG = 0
46
def get_url(path, compressed=False):
51
mutter("grab url %s" % url)
52
url_f = urlgrabber.urlopen(url, keepalive=1, close_connection=0)
56
return gzip.GzipFile(fileobj=StringIO(url_f.read()))
57
except urllib2.URLError, e:
58
raise BzrError("remote fetch failed: %r: %s" % (url, e))
60
def get_url(url, compressed=False):
64
mutter("get_url %s" % url)
65
url_f = urllib2.urlopen(url)
67
return gzip.GzipFile(fileobj=StringIO(url_f.read()))
73
def _find_remote_root(url):
74
"""Return the prefix URL that corresponds to the branch root."""
78
ff = get_url(url + '/.bzr/branch-format')
83
fmt = fmt.rstrip('\r\n')
84
if fmt != BZR_BRANCH_FORMAT.rstrip('\r\n'):
85
raise BzrError("sorry, branch format %r not supported at url %s"
89
except urllib2.URLError:
95
raise BzrError('no branch root found for URL %s' % orig_url)
101
class RemoteBranch(Branch):
102
def __init__(self, baseurl, find_root=True):
103
"""Create new proxy for a remote branch."""
104
if lock_mode not in ('', 'r'):
105
raise BzrError('lock mode %r is not supported for remote branches'
109
self.baseurl = _find_remote_root(baseurl)
111
self.baseurl = baseurl
114
self.inventory_store = RemoteStore(baseurl + '/.bzr/inventory-store/')
115
self.text_store = RemoteStore(baseurl + '/.bzr/text-store/')
118
return '%s(%r)' % (self.__class__.__name__, self.baseurl)
122
def controlfile(self, filename, mode):
123
if mode not in ('rb', 'rt', 'r'):
124
raise BzrError("file mode %r not supported for remote branches" % mode)
125
return get_url(self.baseurl + '/.bzr/' + filename, False)
128
def lock(self, mode):
130
raise BzrError('lock mode %r not supported for remote branch %r' % (mode, self))
136
def relpath(self, path):
137
if not path.startswith(self.baseurl):
138
raise BzrError('path %r is not under base URL %r'
139
% (path, self.baseurl))
140
pl = len(self.baseurl)
141
return path[pl:].lstrip('/')
143
def get_revision(self, revision_id):
144
from revision import Revision
145
revf = get_url(self.baseurl + '/.bzr/revision-store/' + revision_id,
147
r = Revision.read_xml(revf)
148
if r.revision_id != revision_id:
149
raise BzrCheckError('revision stored as {%s} actually contains {%s}'
150
% (revision_id, r.revision_id))
154
class RemoteStore(object):
155
def __init__(self, baseurl):
156
self._baseurl = baseurl
159
def _path(self, name):
161
raise ValueError('invalid store id', name)
162
return self._baseurl + '/' + name
164
def __getitem__(self, fileid):
165
p = self._path(fileid)
166
return get_url(p, compressed=True)
170
"""For experimental purposes, traverse many parts of a remote branch"""
171
from revision import Revision
172
from branch import Branch
173
from inventory import Inventory
179
history = get_url('/.bzr/revision-history').readlines()
180
num_revs = len(history)
181
for i, rev_id in enumerate(history):
182
rev_id = rev_id.rstrip()
183
print 'read revision %d/%d' % (i, num_revs)
185
# python gzip needs a seekable file (!!) but the HTTP response
186
# isn't, so we need to buffer it
188
rev_f = get_url('/.bzr/revision-store/%s' % rev_id,
191
rev = Revision.read_xml(rev_f)
193
inv_id = rev.inventory_id
194
if inv_id not in got_invs:
195
print 'get inventory %s' % inv_id
196
inv_f = get_url('/.bzr/inventory-store/%s' % inv_id,
198
inv = Inventory.read_xml(inv_f)
199
print '%4d inventory entries' % len(inv)
201
for path, ie in inv.iter_entries():
205
if text_id in got_texts:
207
print ' fetch %s text {%s}' % (path, text_id)
208
text_f = get_url('/.bzr/text-store/%s' % text_id,
210
got_texts[text_id] = True
212
got_invs.add[inv_id] = True
218
BASE_URL = 'http://bazaar-ng.org/bzr/bzr.dev/'
219
b = RemoteBranch(BASE_URL)
220
## print '\n'.join(b.revision_history())
221
from log import show_log
225
if __name__ == '__main__':