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# Copyright (C) 2006 Canonical Limited.
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# Authors: David Allouche <david@allouche.net>
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# Aaron Bentley <aaron.bentley@utoronto.ca>
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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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# 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.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from bzrlib.errors import BzrCommandError
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from bzrlib.commands import Command, register_command
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from bzrlib.branch import Branch, BranchFormat
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from bzrlib.bzrdir import BzrDir, BzrDirFormat
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from bzrlib.transport import get_transport
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from bzrlib.builtins import cmd_update
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from bzrlib.trace import note
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from bzrlib.workingtree import WorkingTree
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class cmd_switch(Command):
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"""Set the branch of a lightweight checkout and update."""
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takes_args = ['to_location']
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def run(self, to_location):
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to_branch = Branch.open(to_location)
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self._switch(tree_location, to_branch)
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# need to re-open tree to get the new branch
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tree = WorkingTree.open_containing(tree_location)[0]
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def _switch(self, tree_location, to_branch):
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tree = WorkingTree.open_containing(tree_location)[0]
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self._check_switch_branch_format(tree_location)
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self.set_branch_location(tree.bzrdir, to_branch.base)
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note('Switched to branch: %s' % (to_branch.base,))
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def _update(self, tree):
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if tree.last_revision() == tree.branch.last_revision():
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assert tree.branch.get_master_branch() is None, (
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"switch tried to update a fat checkout")
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note("Tree is up to date.")
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note('Updated to revision %d' %
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(tree.branch.revision_id_to_revno(tree.last_revision()),))
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def _check_switch_branch_format(self, url):
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transport = get_transport(url)
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format = BzrDirFormat.find_format(transport)
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format_string = format.get_format_string()
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if not format_string.startswith("Bazaar-NG meta directory, "):
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raise BzrCommandError(
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'The switch command can only be used on a light checkout.\n'
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'Expected metadir, found %s at %s' % (
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format_string.strip(), transport.base))
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control = BzrDir.open_containing_from_transport(transport)[0]
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branch_format = BranchFormat.find_format(control)
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format_string = branch_format.get_format_string()
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if not format_string.startswith("Bazaar-NG Branch Reference Format "):
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raise BzrCommandError(
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'The switch command can only be used on a light checkout.\n'
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'Expected branch reference, found %s at %s' % (
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format_string.strip(), transport.base))
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if not format_string == "Bazaar-NG Branch Reference Format 1\n":
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raise BzrCommandError(
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'Unsupported: %r' % (format_string.strip(),))
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def set_branch_location(self, control, location):
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"""Set location value of a branch reference.
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The branch living in the control (BzrDir) object must be locked for
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:param control: BzrDir containing the branch reference
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:param location: value to write to the branch reference location.
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branch_format = BranchFormat.find_format(control)
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transport = control.get_branch_transport(None)
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branch = branch_format.open(control)
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location = transport.put_bytes('location', location)
added
removed
switch.py
