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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
# Copyright (C) 2005 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
"""Transport for the local filesystem.
This is a fairly thin wrapper on regular file IO."""
import os
import errno
import shutil
from stat import ST_MODE, S_ISDIR, ST_SIZE
import tempfile
import urllib
from bzrlib.trace import mutter
from bzrlib.transport import Transport, register_transport, \
TransportError, NoSuchFile, FileExists
from bzrlib.osutils import abspath
class LocalTransportError(TransportError):
pass
class LocalTransport(Transport):
"""This is the transport agent for local filesystem access."""
def __init__(self, base):
"""Set the base path where files will be stored."""
if base.startswith('file://'):
base = base[7:]
# realpath is incompatible with symlinks. When we traverse
# up we might be able to normpath stuff. RBC 20051003
super(LocalTransport, self).__init__(
os.path.normpath(abspath(base)))
def should_cache(self):
return False
def clone(self, offset=None):
"""Return a new LocalTransport with root at self.base + offset
Because the local filesystem does not require a connection,
we can just return a new object.
"""
if offset is None:
return LocalTransport(self.base)
else:
return LocalTransport(self.abspath(offset))
def abspath(self, relpath):
"""Return the full url to the given relative URL.
This can be supplied with a string or a list
"""
assert isinstance(relpath, basestring), (type(relpath), relpath)
return os.path.join(self.base, urllib.unquote(relpath))
def relpath(self, abspath):
"""Return the local path portion from a given absolute path.
"""
from bzrlib.osutils import relpath
if abspath is None:
abspath = u'.'
return relpath(self.base, abspath)
def has(self, relpath):
return os.access(self.abspath(relpath), os.F_OK)
def get(self, relpath):
"""Get the file at the given relative path.
:param relpath: The relative path to the file
"""
try:
path = self.abspath(relpath)
return open(path, 'rb')
except IOError,e:
if e.errno in (errno.ENOENT, errno.ENOTDIR):
raise NoSuchFile('File or directory %r does not exist' % path, orig_error=e)
raise LocalTransportError(orig_error=e)
def put(self, relpath, f):
"""Copy the file-like or string object into the location.
:param relpath: Location to put the contents, relative to base.
:param f: File-like or string object.
"""
from bzrlib.atomicfile import AtomicFile
try:
path = self.abspath(relpath)
fp = AtomicFile(path, 'wb')
except IOError, e:
if e.errno == errno.ENOENT:
raise NoSuchFile('File %r does not exist' % path, orig_error=e)
raise LocalTransportError(orig_error=e)
try:
self._pump(f, fp)
fp.commit()
finally:
fp.close()
def iter_files_recursive(self):
"""Iter the relative paths of files in the transports sub-tree."""
queue = list(self.list_dir(u'.'))
while queue:
relpath = urllib.quote(queue.pop(0))
st = self.stat(relpath)
if S_ISDIR(st[ST_MODE]):
for i, basename in enumerate(self.list_dir(relpath)):
queue.insert(i, relpath+'/'+basename)
else:
yield relpath
def mkdir(self, relpath):
"""Create a directory at the given path."""
try:
os.mkdir(self.abspath(relpath))
except OSError,e:
if e.errno == errno.EEXIST:
raise FileExists(orig_error=e)
elif e.errno == errno.ENOENT:
raise NoSuchFile(orig_error=e)
raise LocalTransportError(orig_error=e)
def append(self, relpath, f):
"""Append the text in the file-like object into the final
location.
"""
fp = open(self.abspath(relpath), 'ab')
self._pump(f, fp)
def copy(self, rel_from, rel_to):
"""Copy the item at rel_from to the location at rel_to"""
import shutil
path_from = self.abspath(rel_from)
path_to = self.abspath(rel_to)
try:
shutil.copy(path_from, path_to)
except OSError,e:
raise LocalTransportError(orig_error=e)
def move(self, rel_from, rel_to):
"""Move the item at rel_from to the location at rel_to"""
path_from = self.abspath(rel_from)
path_to = self.abspath(rel_to)
try:
os.rename(path_from, path_to)
except OSError,e:
raise LocalTransportError(orig_error=e)
def delete(self, relpath):
"""Delete the item at relpath"""
try:
os.remove(self.abspath(relpath))
except OSError,e:
raise LocalTransportError(orig_error=e)
def copy_to(self, relpaths, other, pb=None):
"""Copy a set of entries from self into another Transport.
:param relpaths: A list/generator of entries to be copied.
"""
if isinstance(other, LocalTransport):
# Both from & to are on the local filesystem
# Unfortunately, I can't think of anything faster than just
# copying them across, one by one :(
import shutil
total = self._get_total(relpaths)
count = 0
for path in relpaths:
self._update_pb(pb, 'copy-to', count, total)
try:
shutil.copy(self.abspath(path), other.abspath(path))
except IOError, e:
if e.errno in (errno.ENOENT, errno.ENOTDIR):
raise NoSuchFile('File or directory %r does not exist' % path, orig_error=e)
raise LocalTransportError(orig_error=e)
count += 1
return count
else:
return super(LocalTransport, self).copy_to(relpaths, other, pb=pb)
def listable(self):
"""See Transport.listable."""
return True
def list_dir(self, relpath):
"""Return a list of all files at the given location.
WARNING: many transports do not support this, so trying avoid using
it if at all possible.
"""
try:
return os.listdir(self.abspath(relpath))
except OSError,e:
raise LocalTransportError(orig_error=e)
def stat(self, relpath):
"""Return the stat information for a file.
"""
try:
return os.stat(self.abspath(relpath))
except OSError,e:
raise LocalTransportError(orig_error=e)
def lock_read(self, relpath):
"""Lock the given file for shared (read) access.
:return: A lock object, which should be passed to Transport.unlock()
"""
from bzrlib.lock import ReadLock
return ReadLock(self.abspath(relpath))
def lock_write(self, relpath):
"""Lock the given file for exclusive (write) access.
WARNING: many transports do not support this, so trying avoid using it
:return: A lock object, which should be passed to Transport.unlock()
"""
from bzrlib.lock import WriteLock
return WriteLock(self.abspath(relpath))
class ScratchTransport(LocalTransport):
"""A transport that works in a temporary dir and cleans up after itself.
The dir only exists for the lifetime of the Python object.
Obviously you should not put anything precious in it.
"""
def __init__(self, base=None):
if base is None:
base = tempfile.mkdtemp()
super(ScratchTransport, self).__init__(base)
def __del__(self):
shutil.rmtree(self.base, ignore_errors=True)
mutter("%r destroyed" % self)
|