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# Copyright (C) 2006 Canonical Limited.
# Authors: David Allouche <david@allouche.net>
# Aaron Bentley <aaron.bentley@utoronto.ca>
#
# 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
from bzrlib.errors import BzrCommandError
from bzrlib.commands import Command, register_command
from bzrlib.branch import Branch, BranchFormat
from bzrlib.bzrdir import BzrDir, BzrDirFormat
from bzrlib.transport import get_transport
from bzrlib.builtins import cmd_update
from bzrlib.trace import note
from bzrlib.workingtree import WorkingTree
class cmd_switch(Command):
"""Set the branch of a lightweight checkout and update. <BZRTOOLS>"""
takes_args = ['to_location']
def run(self, to_location):
to_branch = Branch.open(to_location)
url = '.'
wt = WorkingTree.open_containing(url)[0]
branch = wt.branch
unlockables = []
try:
wt.lock_write()
unlockables.append(wt)
branch.lock_write()
unlockables.append(branch)
self._check_switch_branch_format(url)
self.set_branch_location(wt.bzrdir, to_branch.base)
note('Switched to branch: %s' % (to_branch.base,))
wt.update()
note('Updated to revision %d' %
(wt.branch.revision_id_to_revno(wt.last_revision()),))
finally:
for unlockable in unlockables:
unlockable.unlock()
def _check_switch_branch_format(self, url):
transport = get_transport(url)
format = BzrDirFormat.find_format(transport)
format_string = format.get_format_string()
if not format_string.startswith("Bazaar-NG meta directory, "):
raise BzrCommandError(
'The switch command can only be used on a light checkout.\n'
'Expected metadir, found %s at %s' % (
format_string.strip(), transport.base))
control = BzrDir.open_containing_from_transport(transport)[0]
branch_format = BranchFormat.find_format(control)
format_string = branch_format.get_format_string()
if not format_string.startswith("Bazaar-NG Branch Reference Format "):
raise BzrCommandError(
'The switch command can only be used on a light checkout.\n'
'Expected branch reference, found %s at %s' % (
format_string.strip(), transport.base))
if not format_string == "Bazaar-NG Branch Reference Format 1\n":
raise BzrCommandError(
'Unsupported: %r' % (format_string.strip(),))
def set_branch_location(self, control, location):
"""Set location value of a branch reference.
The branch living in the control (BzrDir) object must be locked for
writing.
:param control: BzrDir containing the branch reference
:param location: value to write to the branch reference location.
"""
branch_format = BranchFormat.find_format(control)
transport = control.get_branch_transport(None)
branch = branch_format.open(control)
location = transport.put('location', location)
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