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- Committer: Martin Pool
- Date: 2005-09-30 03:38:47 UTC
- mfrom: (1393.2.4)
- mto: (1185.14.2)
- mto: This revision was merged to the branch mainline in revision 1396.
- Revision ID: mbp@sourcefrog.net-20050930033847-e78ce2a6670c1a29
- merge Transport from John into newformat
- files added:
- bzrlib/selftest/testtransport.py
- bzrlib/store
- bzrlib/transport
- files removed:
- bzrlib/remotebranch.py
- files renamed:
- bzrlib/store.py => bzrlib/store/__init__.py
- bzrlib/weavestore.py => bzrlib/store/weave.py
- files modified:
- bzrlib/atomicfile.py
added
removed
bzrlib/transport/local.py
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# Copyright (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Implementation of Transport for the local filesystem.
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"""
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from bzrlib.transport import Transport, register_transport, \
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TransportError, NoSuchFile, FileExists
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import os, errno
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class LocalTransportError(TransportError):
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pass
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class LocalTransport(Transport):
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"""This is the transport agent for local filesystem access."""
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def __init__(self, base):
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"""Set the base path where files will be stored."""
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if base.startswith('file://'):
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base = base[7:]
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super(LocalTransport, self).__init__(os.path.realpath(base))
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def should_cache(self):
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return False
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def clone(self, offset=None):
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"""Return a new LocalTransport with root at self.base + offset
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Because the local filesystem does not require a connection,
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we can just return a new object.
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"""
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if offset is None:
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return LocalTransport(self.base)
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else:
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return LocalTransport(self.abspath(offset))
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def abspath(self, relpath):
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"""Return the full url to the given relative path.
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This can be supplied with a string or a list
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"""
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if isinstance(relpath, basestring):
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relpath = [relpath]
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return os.path.join(self.base, *relpath)
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def relpath(self, abspath):
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"""Return the local path portion from a given absolute path.
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"""
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from bzrlib.branch import _relpath
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return _relpath(self.base, abspath)
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def has(self, relpath):
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return os.access(self.abspath(relpath), os.F_OK)
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def get(self, relpath):
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"""Get the file at the given relative path.
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:param relpath: The relative path to the file
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"""
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try:
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path = self.abspath(relpath)
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return open(path, 'rb')
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except IOError,e:
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if e.errno == errno.ENOENT:
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raise NoSuchFile('File %r does not exist' % path, orig_error=e)
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raise LocalTransportError(orig_error=e)
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def get_partial(self, relpath, start, length=None):
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"""Get just part of a file.
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:param relpath: Path to the file, relative to base
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:param start: The starting position to read from
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:param length: The length to read. A length of None indicates
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read to the end of the file.
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:return: A file-like object containing at least the specified bytes.
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Some implementations may return objects which can be read
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past this length, but this is not guaranteed.
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"""
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# LocalTransport.get_partial() doesn't care about the length
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# argument, because it is using a local file, and thus just
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# returns the file seek'ed to the appropriate location.
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try:
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path = self.abspath(relpath)
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f = open(path, 'rb')
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f.seek(start, 0)
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return f
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except IOError,e:
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if e.errno == errno.ENOENT:
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raise NoSuchFile('File %r does not exist' % path, orig_error=e)
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raise LocalTransportError(orig_error=e)
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def put(self, relpath, f):
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"""Copy the file-like or string object into the location.
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:param relpath: Location to put the contents, relative to base.
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:param f: File-like or string object.
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"""
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from bzrlib.atomicfile import AtomicFile
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try:
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path = self.abspath(relpath)
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fp = AtomicFile(path, 'wb')
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except IOError, e:
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if e.errno == errno.ENOENT:
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raise NoSuchFile('File %r does not exist' % path, orig_error=e)
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raise LocalTransportError(orig_error=e)
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try:
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self._pump(f, fp)
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fp.commit()
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finally:
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fp.close()
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def mkdir(self, relpath):
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"""Create a directory at the given path."""
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try:
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os.mkdir(self.abspath(relpath))
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except OSError,e:
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if e.errno == errno.EEXIST:
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raise FileExists(orig_error=e)
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elif e.errno == errno.ENOENT:
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raise NoSuchFile(orig_error=e)
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raise LocalTransportError(orig_error=e)
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def append(self, relpath, f):
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"""Append the text in the file-like object into the final
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location.
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"""
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fp = open(self.abspath(relpath), 'ab')
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self._pump(f, fp)
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def copy(self, rel_from, rel_to):
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"""Copy the item at rel_from to the location at rel_to"""
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import shutil
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path_from = self.abspath(rel_from)
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path_to = self.abspath(rel_to)
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try:
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shutil.copy(path_from, path_to)
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except OSError,e:
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raise LocalTransportError(orig_error=e)
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def move(self, rel_from, rel_to):
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"""Move the item at rel_from to the location at rel_to"""
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path_from = self.abspath(rel_from)
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path_to = self.abspath(rel_to)
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try:
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os.rename(path_from, path_to)
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except OSError,e:
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raise LocalTransportError(orig_error=e)
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def delete(self, relpath):
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"""Delete the item at relpath"""
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try:
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os.remove(self.abspath(relpath))
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except OSError,e:
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raise LocalTransportError(orig_error=e)
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def copy_to(self, relpaths, other, pb=None):
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"""Copy a set of entries from self into another Transport.
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:param relpaths: A list/generator of entries to be copied.
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"""
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if isinstance(other, LocalTransport):
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# Both from & to are on the local filesystem
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# Unfortunately, I can't think of anything faster than just
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# copying them across, one by one :(
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import shutil
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total = self._get_total(relpaths)
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count = 0
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for path in relpaths:
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self._update_pb(pb, 'copy-to', count, total)
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shutil.copy(self.abspath(path), other.abspath(path))
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count += 1
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return count
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else:
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return super(LocalTransport, self).copy_to(relpaths, other, pb=pb)
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def list_dir(self, relpath):
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"""Return a list of all files at the given location.
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WARNING: many transports do not support this, so trying avoid using
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it if at all possible.
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"""
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try:
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return os.listdir(self.abspath(relpath))
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except OSError,e:
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raise LocalTransportError(orig_error=e)
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def stat(self, relpath):
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"""Return the stat information for a file.
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"""
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try:
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return os.stat(self.abspath(relpath))
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except OSError,e:
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raise LocalTransportError(orig_error=e)
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def lock_read(self, relpath):
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"""Lock the given file for shared (read) access.
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:return: A lock object, which should be passed to Transport.unlock()
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"""
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from bzrlib.lock import ReadLock
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return ReadLock(self.abspath(relpath))
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def lock_write(self, relpath):
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"""Lock the given file for exclusive (write) access.
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WARNING: many transports do not support this, so trying avoid using it
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:return: A lock object, which should be passed to Transport.unlock()
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"""
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from bzrlib.lock import WriteLock
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return WriteLock(self.abspath(relpath))
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# If nothing else matches, try the LocalTransport
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register_transport(None, LocalTransport)
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register_transport('file://', LocalTransport)
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