1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
# 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."""
takes_args = ['to_location']
def run(self, to_location):
to_branch = Branch.open(to_location)
tree_location = '.'
self._switch(tree_location, to_branch)
# need to re-open tree to get the new branch
tree = WorkingTree.open_containing(tree_location)[0]
self._update(tree)
def _switch(self, tree_location, to_branch):
tree = WorkingTree.open_containing(tree_location)[0]
tree.lock_write()
try:
self._check_switch_branch_format(tree_location)
self.set_branch_location(tree.bzrdir, to_branch.base)
note('Switched to branch: %s' % (to_branch.base,))
finally:
tree.unlock()
def _update(self, tree):
tree.lock_write()
try:
if tree.last_revision() == tree.branch.last_revision():
assert tree.branch.get_master_branch() is None, (
"switch tried to update a fat checkout")
note("Tree is up to date.")
return
tree.update()
note('Updated to revision %d' %
(tree.branch.revision_id_to_revno(tree.last_revision()),))
finally:
tree.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_bytes('location', location)
|