1
# Copyright (C) 2005, 2006, 2008, 2009, 2010 Canonical Ltd
1
# Copyright (C) 2005 by Canonical Development Ltd
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
5
5
# the Free Software Foundation; either version 2 of the License, or
6
6
# (at your option) any later version.
8
8
# This program is distributed in the hope that it will be useful,
9
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
11
# GNU General Public License for more details.
13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""A store that keeps the full text of every version.
18
A store that keeps the full text of every version.
19
20
This store keeps uncompressed versions of the full text. It does not
20
21
do any sort of delta compression.
23
from __future__ import absolute_import
26
from bzrlib.store import hash_prefix
27
from bzrlib.trace import mutter
28
from bzrlib.errors import BzrError, NoSuchFile, FileExists
28
from .... import osutils
29
from ....errors import BzrError, NoSuchFile, FileExists
30
from ....sixish import (
33
from . import TransportStore
34
from ....trace import mutter
37
class TextStore(TransportStore):
31
from cStringIO import StringIO
34
class TextStore(bzrlib.store.TransportStore):
38
35
"""Store that holds files indexed by unique names.
40
37
Files can be added, but not modified once they are in. Typically
47
44
def _add_compressed(self, fn, f):
48
if isinstance(f, bytes):
45
from cStringIO import StringIO
46
from bzrlib.osutils import pumpfile
48
if isinstance(f, basestring):
52
52
gf = gzip.GzipFile(mode='wb', fileobj=sio)
53
53
# if pumpfile handles files that don't fit in ram,
54
54
# so will this function
55
osutils.pumpfile(f, gf)
58
58
self._try_put(fn, sio)
66
66
def _try_put(self, fn, f):
68
self._transport.put_file(fn, f, mode=self._file_mode)
68
self._transport.put(fn, f)
70
70
if not self._prefixed:
73
self._transport.mkdir(os.path.dirname(fn), mode=self._dir_mode)
73
self._transport.mkdir(os.path.dirname(fn))
76
self._transport.put_file(fn, f, mode=self._file_mode)
76
self._transport.put(fn, f)
78
78
def _get(self, fn):
79
79
if fn.endswith('.gz'):
82
82
return self._transport.get(fn)
84
def _copy_one(self, fileid, suffix, other, pb):
85
# TODO: Once the copy_to interface is improved to allow a source
86
# and destination targets, then we can always do the copy
87
# as long as other is a TextStore
88
if not (isinstance(other, TextStore)
89
and other._prefixed == self._prefixed):
90
return super(TextStore, self)._copy_one(fileid, suffix, other, pb)
92
mutter('_copy_one: %r, %r', fileid, suffix)
93
path = other._get_name(fileid, suffix)
95
raise KeyError(fileid + '-' + str(suffix))
98
result = other._transport.copy_to([path], self._transport, pb=pb)
100
if not self._prefixed:
103
self._transport.mkdir(hash_prefix(fileid)[:-1])
106
result = other._transport.copy_to([path], self._transport, pb=pb)
109
raise BzrError('Unable to copy file: %r' % (path,))
84
111
def _get_compressed(self, filename):
85
112
"""Returns a file reading from a particular entry."""
86
113
f = self._transport.get(filename)
87
114
# gzip.GzipFile.read() requires a tell() function
88
115
# but some transports return objects that cannot seek
89
# so buffer them in a BytesIO instead
90
if getattr(f, 'tell', None) is not None:
116
# so buffer them in a StringIO instead
117
if hasattr(f, 'tell'):
91
118
return gzip.GzipFile(mode='rb', fileobj=f)
93
sio = BytesIO(f.read())
120
from cStringIO import StringIO
121
sio = StringIO(f.read())
94
122
return gzip.GzipFile(mode='rb', fileobj=sio)
125
def ScratchTextStore():
126
return TextStore(ScratchTransport())