14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
Stores are the main data-storage mechanism for Bazaar-NG.
17
"""Stores are the main data-storage mechanism for Bazaar-NG.
20
19
A store is a simple write-once container indexed by a universally
20
unique ID, which is typically the SHA-1 of the content."""
22
__copyright__ = "Copyright (C) 2005 Canonical Ltd."
23
__author__ = "Martin Pool <mbp@canonical.com>"
24
25
import os, tempfile, types, osutils, gzip, errno
25
26
from stat import ST_SIZE
26
27
from StringIO import StringIO
27
from bzrlib.trace import mutter
28
from trace import mutter
30
30
######################################################################
60
60
TODO: Atomic add by writing to a temporary file and renaming.
62
In bzr 0.0.5 and earlier, files within the store were marked
63
readonly on disk. This is no longer done but existing stores need
62
TODO: Perhaps automatically transform to/from XML in a method?
63
Would just need to tell the constructor what class to
66
TODO: Even within a simple disk store like this, we could
67
gzip the files. But since many are less than one disk
68
block, that might not help a lot.
67
72
def __init__(self, basedir):
73
"""ImmutableStore constructor."""
68
74
self._basedir = basedir
70
76
def _path(self, id):
71
if '\\' in id or '/' in id:
72
raise ValueError("invalid store id %r" % id)
73
78
return os.path.join(self._basedir, id)
75
80
def __repr__(self):
79
84
"""Add contents of a file into the store.
81
86
f -- An open file, or file-like object."""
82
# FIXME: Only works on files that will fit in memory
84
from bzrlib.atomicfile import AtomicFile
87
# FIXME: Only works on smallish files
88
# TODO: Can be optimized by copying at the same time as
86
90
mutter("add store entry %r" % (fileid))
87
91
if isinstance(f, types.StringTypes):
92
96
p = self._path(fileid)
93
97
if os.access(p, os.F_OK) or os.access(p + '.gz', os.F_OK):
94
from bzrlib.errors import bailout
95
raise BzrError("store %r already contains id %r" % (self._basedir, fileid))
98
bailout("store %r already contains id %r" % (self._basedir, fileid))
101
f = gzip.GzipFile(p + '.gz', 'wb')
102
os.chmod(p + '.gz', 0444)
101
af = AtomicFile(fn, 'wb')
104
gf = gzip.GzipFile(mode='wb', fileobj=af)
114
def copy_multi(self, other, ids, permit_failure=False):
110
def copy_multi(self, other, ids):
115
111
"""Copy texts for ids from other into self.
117
If an id is present in self, it is skipped.
119
Returns (count_copied, failed), where failed is a collection of ids
120
that could not be copied.
113
If an id is present in self, it is skipped. A count of copied
114
ids is returned, which may be less than len(ids).
122
pb = bzrlib.ui.ui_factory.progress_bar()
124
pb.update('preparing to copy')
125
to_copy = [id for id in ids if id not in self]
126
if isinstance(other, ImmutableStore):
127
return self.copy_multi_immutable(other, to_copy, pb)
131
pb.update('copy', count, len(to_copy))
132
if not permit_failure:
133
self.add(other[id], id)
142
assert count == len(to_copy)
147
def copy_multi_immutable(self, other, to_copy, pb, permit_failure=False):
148
from shutil import copyfile
153
other_p = other._path(id)
157
if e.errno == errno.ENOENT:
158
if not permit_failure:
159
copyfile(other_p+".gz", p+".gz")
162
copyfile(other_p+".gz", p+".gz")
164
if e.errno == errno.ENOENT:
172
pb.update('copy', count, len(to_copy))
173
assert count == len(to_copy)
120
self.add(other[id], id)
178
124
def __contains__(self, fileid):
added
removed
bzrlib/store.py
