/brz/remove-bazaar

To get this branch, use:
bzr branch http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar
1739.2.6 by Robert Collins
Merge bzr.dev
1
# Copyright (C) 2006, 2008 Canonical Ltd
1739.2.3 by Robert Collins
Add a replacement for os.listdir which returns file kind information from readdir when it is available. This drops our osutils.walkdirs time further, down to 77ms.
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
4183.7.1 by Sabin Iacob
update FSF mailing address
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1739.2.3 by Robert Collins
Add a replacement for os.listdir which returns file kind information from readdir when it is available. This drops our osutils.walkdirs time further, down to 77ms.
16
6379.6.3 by Jelmer Vernooij
Use absolute_import.
17
from __future__ import absolute_import
18
1739.2.6 by Robert Collins
Merge bzr.dev
19
"""Python implementation of readdir interface."""
1739.2.3 by Robert Collins
Add a replacement for os.listdir which returns file kind information from readdir when it is available. This drops our osutils.walkdirs time further, down to 77ms.
20
21
3696.3.5 by Robert Collins
Streamline _walkdirs_utf8 for utf8 file systems, reducing time to traverse a mozilla tree from 1s to .6 seconds. (Robert Collins)
22
import stat
23
24
25
_directory = 'directory'
26
_chardev = 'chardev'
27
_block = 'block'
28
_file = 'file'
29
_fifo = 'fifo'
30
_symlink = 'symlink'
31
_socket = 'socket'
32
_unknown = 'unknown'
33
34
_formats = {
35
    stat.S_IFDIR:'directory',
36
    stat.S_IFCHR:'chardev',
37
    stat.S_IFBLK:'block',
38
    stat.S_IFREG:'file',
39
    stat.S_IFIFO:'fifo',
40
    stat.S_IFLNK:'symlink',
41
    stat.S_IFSOCK:'socket',
42
}
43
44
45
def _kind_from_mode(stat_mode, _formats=_formats, _unknown='unknown'):
46
    """Generate a file kind from a stat mode. This is used in walkdirs.
47
3696.3.10 by Robert Collins
Review feedback.
48
    It's performance is critical: Do not mutate without careful benchmarking.
1739.2.3 by Robert Collins
Add a replacement for os.listdir which returns file kind information from readdir when it is available. This drops our osutils.walkdirs time further, down to 77ms.
49
    """
3696.3.5 by Robert Collins
Streamline _walkdirs_utf8 for utf8 file systems, reducing time to traverse a mozilla tree from 1s to .6 seconds. (Robert Collins)
50
    try:
51
        return _formats[stat_mode & 0170000]
52
    except KeyError:
53
        return _unknown