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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
# Copyright (C) 2006-2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Implementation of Transport that decorates another transport.
This does not change the transport behaviour at all, but provides all the
stub functions to allow other decorators to be written easily.
"""
from bzrlib import transport
class TransportDecorator(transport.Transport):
"""A no-change decorator for Transports.
Subclasses of this are new transports that are based on an
underlying transport and can override or intercept some
behavior. For example ReadonlyTransportDecorator prevents
all write attempts, and FakeNFSTransportDecorator simulates
some NFS quirks.
This decorator class is not directly usable as a decorator:
you must use a subclass which has overridden the _get_url_prefix() class
method to return the url prefix for the subclass.
"""
def __init__(self, url, _decorated=None, _from_transport=None):
"""Set the 'base' path of the transport.
:param _decorated: A private parameter for cloning.
:param _from_transport: Is available for subclasses that
need to share state across clones.
"""
prefix = self._get_url_prefix()
if not url.startswith(prefix):
raise ValueError("url %r doesn't start with decorator prefix %r" %
(url, prefix))
not_decorated_url = url[len(prefix):]
if _decorated is None:
self._decorated = transport.get_transport(not_decorated_url)
else:
self._decorated = _decorated
super(TransportDecorator, self).__init__(prefix + self._decorated.base)
def abspath(self, relpath):
"""See Transport.abspath()."""
return self._get_url_prefix() + self._decorated.abspath(relpath)
def append_file(self, relpath, f, mode=None):
"""See Transport.append_file()."""
return self._decorated.append_file(relpath, f, mode=mode)
def append_bytes(self, relpath, bytes, mode=None):
"""See Transport.append_bytes()."""
return self._decorated.append_bytes(relpath, bytes, mode=mode)
def _can_roundtrip_unix_modebits(self):
"""See Transport._can_roundtrip_unix_modebits()."""
return self._decorated._can_roundtrip_unix_modebits()
def clone(self, offset=None):
"""See Transport.clone()."""
decorated_clone = self._decorated.clone(offset)
return self.__class__(
self._get_url_prefix() + decorated_clone.base, decorated_clone,
self)
def delete(self, relpath):
"""See Transport.delete()."""
return self._decorated.delete(relpath)
def delete_tree(self, relpath):
"""See Transport.delete_tree()."""
return self._decorated.delete_tree(relpath)
def external_url(self):
"""See bzrlib.transport.Transport.external_url."""
# while decorators are in-process only, they
# can be handed back into bzrlib safely, so
# its just the base.
return self.base
@classmethod
def _get_url_prefix(self):
"""Return the URL prefix of this decorator."""
raise NotImplementedError(self._get_url_prefix)
def get(self, relpath):
"""See Transport.get()."""
return self._decorated.get(relpath)
def get_smart_client(self):
return self._decorated.get_smart_client()
def has(self, relpath):
"""See Transport.has()."""
return self._decorated.has(relpath)
def is_readonly(self):
"""See Transport.is_readonly."""
return self._decorated.is_readonly()
def mkdir(self, relpath, mode=None):
"""See Transport.mkdir()."""
return self._decorated.mkdir(relpath, mode)
def open_write_stream(self, relpath, mode=None):
"""See Transport.open_write_stream."""
return self._decorated.open_write_stream(relpath, mode=mode)
def put_file(self, relpath, f, mode=None):
"""See Transport.put_file()."""
return self._decorated.put_file(relpath, f, mode)
def put_bytes(self, relpath, bytes, mode=None):
"""See Transport.put_bytes()."""
return self._decorated.put_bytes(relpath, bytes, mode)
def listable(self):
"""See Transport.listable."""
return self._decorated.listable()
def iter_files_recursive(self):
"""See Transport.iter_files_recursive()."""
return self._decorated.iter_files_recursive()
def list_dir(self, relpath):
"""See Transport.list_dir()."""
return self._decorated.list_dir(relpath)
def _readv(self, relpath, offsets):
"""See Transport._readv."""
return self._decorated._readv(relpath, offsets)
def recommended_page_size(self):
"""See Transport.recommended_page_size()."""
return self._decorated.recommended_page_size()
def rename(self, rel_from, rel_to):
return self._decorated.rename(rel_from, rel_to)
def rmdir(self, relpath):
"""See Transport.rmdir."""
return self._decorated.rmdir(relpath)
def stat(self, relpath):
"""See Transport.stat()."""
return self._decorated.stat(relpath)
def lock_read(self, relpath):
"""See Transport.lock_read."""
return self._decorated.lock_read(relpath)
def lock_write(self, relpath):
"""See Transport.lock_write."""
return self._decorated.lock_write(relpath)
def _redirected_to(self, source, target):
redirected = self._decorated._redirected_to(source, target)
if redirected is not None:
return self.__class__(self._get_url_prefix() + redirected.base,
redirected)
else:
return None
def get_test_permutations():
"""Return the permutations to be used in testing.
The Decorator class is not directly usable, and testing it would not have
any benefit - its the concrete classes which need to be tested.
"""
return []
|