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# Copyright (C) 2006, 2007 Canonical Ltd
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Server-side repository related request implmentations."""
import os
import sys
import tempfile
import tarfile
from bzrlib import errors
from bzrlib.bzrdir import BzrDir
from bzrlib.smart.request import (
FailedSmartServerResponse,
SmartServerRequest,
SuccessfulSmartServerResponse,
)
class SmartServerRepositoryRequest(SmartServerRequest):
"""Common base class for Repository requests."""
def do(self, path, *args):
"""Execute a repository request.
The repository must be at the exact path - no searching is done.
The actual logic is delegated to self.do_repository_request.
:param path: The path for the repository.
:return: A smart server from self.do_repository_request().
"""
transport = self._backing_transport.clone(path)
bzrdir = BzrDir.open_from_transport(transport)
repository = bzrdir.open_repository()
return self.do_repository_request(repository, *args)
class SmartServerRepositoryGetRevisionGraph(SmartServerRepositoryRequest):
def do_repository_request(self, repository, revision_id):
"""Return the result of repository.get_revision_graph(revision_id).
:param repository: The repository to query in.
:param revision_id: The utf8 encoded revision_id to get a graph from.
:return: A smart server response where the body contains an utf8
encoded flattened list of the revision graph.
"""
if not revision_id:
revision_id = None
lines = []
try:
revision_graph = repository.get_revision_graph(revision_id)
except errors.NoSuchRevision:
# Note that we return an empty body, rather than omitting the body.
# This way the client knows that it can always expect to find a body
# in the response for this method, even in the error case.
return FailedSmartServerResponse(('nosuchrevision', revision_id), '')
for revision, parents in revision_graph.items():
lines.append(' '.join([revision,] + parents))
return SuccessfulSmartServerResponse(('ok', ), '\n'.join(lines))
class SmartServerRequestHasRevision(SmartServerRepositoryRequest):
def do_repository_request(self, repository, revision_id):
"""Return ok if a specific revision is in the repository at path.
:param repository: The repository to query in.
:param revision_id: The utf8 encoded revision_id to lookup.
:return: A smart server response of ('ok', ) if the revision is
present.
"""
if repository.has_revision(revision_id):
return SuccessfulSmartServerResponse(('yes', ))
else:
return SuccessfulSmartServerResponse(('no', ))
class SmartServerRepositoryGatherStats(SmartServerRepositoryRequest):
def do_repository_request(self, repository, revid, committers):
"""Return the result of repository.gather_stats().
:param repository: The repository to query in.
:param revid: utf8 encoded rev id or an empty string to indicate None
:param committers: 'yes' or 'no'.
:return: A SmartServerResponse ('ok',), a encoded body looking like
committers: 1
firstrev: 1234.230 0
latestrev: 345.700 3600
revisions: 2
size:45
But containing only fields returned by the gather_stats() call
"""
if revid == '':
decoded_revision_id = None
else:
decoded_revision_id = revid
if committers == 'yes':
decoded_committers = True
else:
decoded_committers = None
stats = repository.gather_stats(decoded_revision_id, decoded_committers)
body = ''
if stats.has_key('committers'):
body += 'committers: %d\n' % stats['committers']
if stats.has_key('firstrev'):
body += 'firstrev: %.3f %d\n' % stats['firstrev']
if stats.has_key('latestrev'):
body += 'latestrev: %.3f %d\n' % stats['latestrev']
if stats.has_key('revisions'):
body += 'revisions: %d\n' % stats['revisions']
if stats.has_key('size'):
body += 'size: %d\n' % stats['size']
return SuccessfulSmartServerResponse(('ok', ), body)
class SmartServerRepositoryIsShared(SmartServerRepositoryRequest):
def do_repository_request(self, repository):
"""Return the result of repository.is_shared().
:param repository: The repository to query in.
:return: A smart server response of ('yes', ) if the repository is
shared, and ('no', ) if it is not.
"""
if repository.is_shared():
return SuccessfulSmartServerResponse(('yes', ))
else:
return SuccessfulSmartServerResponse(('no', ))
class SmartServerRepositoryLockWrite(SmartServerRepositoryRequest):
def do_repository_request(self, repository, token=''):
# XXX: this probably should not have a token.
if token == '':
token = None
try:
token = repository.lock_write(token=token)
except errors.LockContention, e:
return FailedSmartServerResponse(('LockContention',))
except errors.UnlockableTransport:
return FailedSmartServerResponse(('UnlockableTransport',))
repository.leave_lock_in_place()
repository.unlock()
if token is None:
token = ''
return SuccessfulSmartServerResponse(('ok', token))
class SmartServerRepositoryUnlock(SmartServerRepositoryRequest):
def do_repository_request(self, repository, token):
try:
repository.lock_write(token=token)
except errors.TokenMismatch, e:
return FailedSmartServerResponse(('TokenMismatch',))
repository.dont_leave_lock_in_place()
repository.unlock()
return SuccessfulSmartServerResponse(('ok',))
class SmartServerRepositoryTarball(SmartServerRepositoryRequest):
"""Get the raw repository files as a tarball.
The returned tarball contains a .bzr control directory which in turn
contains a repository.
This takes one parameter, compression, which currently must be
"", "gz", or "bz2".
This is used to implement the Repository.copy_content_into operation.
"""
def do_repository_request(self, repository, compression):
from bzrlib import osutils
repo_transport = repository.control_files._transport
tmp_dirname, tmp_repo = self._copy_to_tempdir(repository)
try:
controldir_name = tmp_dirname + '/.bzr'
return self._tarfile_response(controldir_name, compression)
finally:
osutils.rmtree(tmp_dirname)
def _copy_to_tempdir(self, from_repo):
tmp_dirname = tempfile.mkdtemp(prefix='tmpbzrclone')
tmp_bzrdir = from_repo.bzrdir._format.initialize(tmp_dirname)
tmp_repo = from_repo._format.initialize(tmp_bzrdir)
from_repo.copy_content_into(tmp_repo)
return tmp_dirname, tmp_repo
def _tarfile_response(self, tmp_dirname, compression):
temp = tempfile.NamedTemporaryFile()
try:
self._tarball_of_dir(tmp_dirname, compression, temp.file)
# all finished; write the tempfile out to the network
temp.seek(0)
return SuccessfulSmartServerResponse(('ok',), temp.read())
# FIXME: Don't read the whole thing into memory here; rather stream it
# out from the file onto the network. mbp 20070411
finally:
temp.close()
def _tarball_of_dir(self, dirname, compression, ofile):
filename = os.path.basename(ofile.name)
tarball = tarfile.open(fileobj=ofile, name=filename,
mode='w|' + compression)
try:
# The tarball module only accepts ascii names, and (i guess)
# packs them with their 8bit names. We know all the files
# within the repository have ASCII names so the should be safe
# to pack in.
dirname = dirname.encode(sys.getfilesystemencoding())
# python's tarball module includes the whole path by default so
# override it
assert dirname.endswith('.bzr')
tarball.add(dirname, '.bzr') # recursive by default
finally:
tarball.close()
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