|
1442.1.44
by Robert Collins
Many transport related tweaks: |
1 |
# Copyright (C) 2005 Canonical Ltd
|
2 |
||
3 |
# This program is free software; you can redistribute it and/or modify
|
|
4 |
# it under the terms of the GNU General Public License as published by
|
|
5 |
# the Free Software Foundation; either version 2 of the License, or
|
|
6 |
# (at your option) any later version.
|
|
7 |
||
8 |
# This program is distributed in the hope that it will be useful,
|
|
9 |
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
10 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
11 |
# GNU General Public License for more details.
|
|
12 |
||
13 |
# You should have received a copy of the GNU General Public License
|
|
14 |
# along with this program; if not, write to the Free Software
|
|
15 |
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
16 |
"""Implementation of Transport that uses memory for its storage."""
|
|
17 |
||
18 |
import os |
|
19 |
import errno |
|
20 |
from cStringIO import StringIO |
|
21 |
||
22 |
from bzrlib.trace import mutter |
|
|
1185.31.44
by John Arbash Meinel
Cleaned up Exceptions for all transports. |
23 |
from bzrlib.errors import TransportError, NoSuchFile, FileExists |
24 |
from bzrlib.transport import Transport |
|
|
1442.1.44
by Robert Collins
Many transport related tweaks: |
25 |
|
26 |
class MemoryStat(object): |
|
27 |
||
28 |
def __init__(self, size): |
|
29 |
self.st_size = size |
|
30 |
||
31 |
||
32 |
class MemoryTransport(Transport): |
|
33 |
"""This is the transport agent for local filesystem access."""
|
|
34 |
||
35 |
def __init__(self): |
|
36 |
"""Set the 'base' path where files will be stored."""
|
|
37 |
super(MemoryTransport, self).__init__('in-memory:') |
|
38 |
self._dirs = set() |
|
39 |
self._files = {} |
|
40 |
||
41 |
def clone(self, offset=None): |
|
42 |
"""See Transport.clone()."""
|
|
43 |
return self |
|
44 |
||
45 |
def abspath(self, relpath): |
|
46 |
"""See Transport.abspath()."""
|
|
47 |
return self.base + relpath |
|
48 |
||
49 |
def append(self, relpath, f): |
|
50 |
"""See Transport.append()."""
|
|
51 |
self._check_parent(relpath) |
|
52 |
self._files[relpath] = self._files.get(relpath, "") + f.read() |
|
53 |
||
54 |
def _check_parent(self, relpath): |
|
55 |
dir = os.path.dirname(relpath) |
|
56 |
if dir != '': |
|
57 |
if not dir in self._dirs: |
|
58 |
raise NoSuchFile(relpath) |
|
59 |
||
60 |
def has(self, relpath): |
|
61 |
"""See Transport.has()."""
|
|
62 |
return relpath in self._files |
|
63 |
||
64 |
def get(self, relpath): |
|
65 |
"""See Transport.get()."""
|
|
66 |
if not relpath in self._files: |
|
67 |
raise NoSuchFile(relpath) |
|
68 |
return StringIO(self._files[relpath]) |
|
69 |
||
|
1185.58.4
by John Arbash Meinel
Added permission checking to Branch, and propogated that change into the stores. |
70 |
def put(self, relpath, f, mode=None): |
|
1442.1.44
by Robert Collins
Many transport related tweaks: |
71 |
"""See Transport.put()."""
|
72 |
self._check_parent(relpath) |
|
73 |
self._files[relpath] = f.read() |
|
74 |
||
|
1185.58.4
by John Arbash Meinel
Added permission checking to Branch, and propogated that change into the stores. |
75 |
def mkdir(self, relpath, mode=None): |
|
1442.1.44
by Robert Collins
Many transport related tweaks: |
76 |
"""See Transport.mkdir()."""
|
77 |
self._check_parent(relpath) |
|
78 |
if relpath in self._dirs: |
|
79 |
raise FileExists(relpath) |
|
80 |
self._dirs.add(relpath) |
|
81 |
||
82 |
def listable(self): |
|
83 |
"""See Transport.listable."""
|
|
84 |
return True |
|
85 |
||
86 |
def iter_files_recursive(self): |
|
87 |
return iter(self._files) |
|
88 |
||
89 |
# def list_dir(self, relpath):
|
|
90 |
# TODO if needed
|
|
91 |
||
92 |
def stat(self, relpath): |
|
93 |
"""See Transport.stat()."""
|
|
94 |
return MemoryStat(len(self._files[relpath])) |
|
95 |
||
96 |
# def lock_read(self, relpath):
|
|
97 |
# TODO if needed
|
|
98 |
#
|
|
99 |
# def lock_write(self, relpath):
|
|
100 |
# TODO if needed
|