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# Copyright (C) 2005, 2006, 2007 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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from cStringIO import StringIO
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from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
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S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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from tempfile import (
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from bzrlib import symbol_versioning
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter
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# On win32, O_BINARY is used to indicate the file should
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# be opened in binary mode, rather than text mode.
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# On other platforms, O_BINARY doesn't exist, because
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# they always open in binary mode, so it is okay to
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# OR with 0 on those platforms
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O_BINARY = getattr(os, 'O_BINARY', 0)
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# On posix, use lstat instead of stat so that we can
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# operate on broken symlinks. On Windows revert to stat.
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lstat = getattr(os, 'lstat', os.stat)
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def make_readonly(filename):
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"""Make a filename read-only."""
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mod = lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
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def make_writable(filename):
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mod = lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
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"""Return a quoted filename filename
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This previously used backslash quoting, but that works poorly on
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# TODO: I'm not really sure this is the best format either.x
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if _QUOTE_RE is None:
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_QUOTE_RE = re.compile(r'([^a-zA-Z0-9.,:/\\_~-])')
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if _QUOTE_RE.search(f):
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_directory_kind = 'directory'
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stat.S_IFDIR:_directory_kind,
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stat.S_IFCHR:'chardev',
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stat.S_IFBLK:'block',
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stat.S_IFLNK:'symlink',
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stat.S_IFSOCK:'socket',
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def file_kind_from_stat_mode(stat_mode, _formats=_formats, _unknown='unknown'):
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"""Generate a file kind from a stat mode. This is used in walkdirs.
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Its performance is critical: Do not mutate without careful benchmarking.
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return _formats[stat_mode & 0170000]
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def file_kind(f, _lstat=os.lstat, _mapper=file_kind_from_stat_mode):
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return _mapper(_lstat(f).st_mode)
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if getattr(e, 'errno', None) == errno.ENOENT:
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raise errors.NoSuchFile(f)
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"""Return the current umask"""
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# Assume that people aren't messing with the umask while running
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# XXX: This is not thread safe, but there is no way to get the
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# umask without setting it
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_directory_kind: "/",
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'tree-reference': '+',
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def kind_marker(kind):
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return _kind_marker_map[kind]
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raise errors.BzrError('invalid file kind %r' % kind)
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lexists = getattr(os.path, 'lexists', None)
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stat = getattr(os, 'lstat', os.stat)
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if e.errno == errno.ENOENT:
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raise errors.BzrError("lstat/stat of (%r): %r" % (f, e))
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def fancy_rename(old, new, rename_func, unlink_func):
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"""A fancy rename, when you don't have atomic rename.
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:param old: The old path, to rename from
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:param new: The new path, to rename to
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:param rename_func: The potentially non-atomic rename function
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:param unlink_func: A way to delete the target file if the full rename succeeds
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# sftp rename doesn't allow overwriting, so play tricks:
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base = os.path.basename(new)
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dirname = os.path.dirname(new)
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tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(), os.getpid(), rand_chars(10))
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tmp_name = pathjoin(dirname, tmp_name)
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# Rename the file out of the way, but keep track if it didn't exist
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# We don't want to grab just any exception
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# something like EACCES should prevent us from continuing
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# The downside is that the rename_func has to throw an exception
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# with an errno = ENOENT, or NoSuchFile
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rename_func(new, tmp_name)
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except (errors.NoSuchFile,), e:
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# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
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# function raises an IOError with errno is None when a rename fails.
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# This then gets caught here.
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if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
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if (getattr(e, 'errno', None) is None
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or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
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# This may throw an exception, in which case success will
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rename_func(old, new)
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# If the file used to exist, rename it back into place
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# otherwise just delete it from the tmp location
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unlink_func(tmp_name)
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rename_func(tmp_name, new)
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
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# choke on a Unicode string containing a relative path if
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
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_fs_enc = sys.getfilesystemencoding() or 'utf-8'
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def _posix_abspath(path):
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# jam 20060426 rather than encoding to fsencoding
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# copy posixpath.abspath, but use os.getcwdu instead
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if not posixpath.isabs(path):
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path = posixpath.join(getcwd(), path)
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return posixpath.normpath(path)
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def _posix_realpath(path):
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return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
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def _win32_fixdrive(path):
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"""Force drive letters to be consistent.
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win32 is inconsistent whether it returns lower or upper case
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and even if it was consistent the user might type the other
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so we force it to uppercase
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running python.exe under cmd.exe return capital C:\\
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running win32 python inside a cygwin shell returns lowercase c:\\
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drive, path = _nt_splitdrive(path)
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return drive.upper() + path
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def _win32_abspath(path):
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# Real _nt_abspath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
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def _win98_abspath(path):
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"""Return the absolute version of a path.
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Windows 98 safe implementation (python reimplementation
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of Win32 API function GetFullPathNameW)
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# \\HOST\path => //HOST/path
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# //HOST/path => //HOST/path
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# path => C:/cwd/path
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# check for absolute path
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drive = _nt_splitdrive(path)[0]
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if drive == '' and path[:2] not in('//','\\\\'):
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# we cannot simply os.path.join cwd and path
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# because os.path.join('C:','/path') produce '/path'
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# and this is incorrect
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if path[:1] in ('/','\\'):
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cwd = _nt_splitdrive(cwd)[0]
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path = cwd + '\\' + path
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return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
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if win32utils.winver == 'Windows 98':
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_win32_abspath = _win98_abspath
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def _win32_realpath(path):
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# Real _nt_realpath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
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def _win32_pathjoin(*args):
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return _nt_join(*args).replace('\\', '/')
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def _win32_normpath(path):
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return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
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return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
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def _win32_mkdtemp(*args, **kwargs):
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return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
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def _win32_rename(old, new):
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"""We expect to be able to atomically replace 'new' with old.
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On win32, if new exists, it must be moved out of the way first,
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fancy_rename(old, new, rename_func=os.rename, unlink_func=os.unlink)
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if e.errno in (errno.EPERM, errno.EACCES, errno.EBUSY, errno.EINVAL):
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# If we try to rename a non-existant file onto cwd, we get
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# EPERM or EACCES instead of ENOENT, this will raise ENOENT
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# if the old path doesn't exist, sometimes we get EACCES
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# On Linux, we seem to get EBUSY, on Mac we get EINVAL
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return unicodedata.normalize('NFKC', os.getcwdu())
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# Default is to just use the python builtins, but these can be rebound on
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# particular platforms.
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abspath = _posix_abspath
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realpath = _posix_realpath
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pathjoin = os.path.join
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normpath = os.path.normpath
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dirname = os.path.dirname
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basename = os.path.basename
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split = os.path.split
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splitext = os.path.splitext
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# These were already imported into local scope
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# mkdtemp = tempfile.mkdtemp
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# rmtree = shutil.rmtree
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MIN_ABS_PATHLENGTH = 1
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if sys.platform == 'win32':
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abspath = _win32_abspath
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realpath = _win32_realpath
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pathjoin = _win32_pathjoin
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normpath = _win32_normpath
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getcwd = _win32_getcwd
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mkdtemp = _win32_mkdtemp
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rename = _win32_rename
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MIN_ABS_PATHLENGTH = 3
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def _win32_delete_readonly(function, path, excinfo):
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"""Error handler for shutil.rmtree function [for win32]
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Helps to remove files and dirs marked as read-only.
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exception = excinfo[1]
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if function in (os.remove, os.rmdir) \
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and isinstance(exception, OSError) \
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and exception.errno == errno.EACCES:
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def rmtree(path, ignore_errors=False, onerror=_win32_delete_readonly):
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"""Replacer for shutil.rmtree: could remove readonly dirs/files"""
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return shutil.rmtree(path, ignore_errors, onerror)
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elif sys.platform == 'darwin':
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def get_terminal_encoding():
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"""Find the best encoding for printing to the screen.
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This attempts to check both sys.stdout and sys.stdin to see
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what encoding they are in, and if that fails it falls back to
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bzrlib.user_encoding.
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The problem is that on Windows, locale.getpreferredencoding()
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is not the same encoding as that used by the console:
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http://mail.python.org/pipermail/python-list/2003-May/162357.html
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On my standard US Windows XP, the preferred encoding is
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cp1252, but the console is cp437
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output_encoding = getattr(sys.stdout, 'encoding', None)
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if not output_encoding:
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input_encoding = getattr(sys.stdin, 'encoding', None)
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if not input_encoding:
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output_encoding = bzrlib.user_encoding
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mutter('encoding stdout as bzrlib.user_encoding %r', output_encoding)
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output_encoding = input_encoding
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mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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if output_encoding == 'cp0':
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# invalid encoding (cp0 means 'no codepage' on Windows)
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output_encoding = bzrlib.user_encoding
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mutter('cp0 is invalid encoding.'
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' encoding stdout as bzrlib.user_encoding %r', output_encoding)
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codecs.lookup(output_encoding)
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sys.stderr.write('bzr: warning:'
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' unknown terminal encoding %s.\n'
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' Using encoding %s instead.\n'
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% (output_encoding, bzrlib.user_encoding)
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output_encoding = bzrlib.user_encoding
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return output_encoding
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def normalizepath(f):
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if getattr(os.path, 'realpath', None) is not None:
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[p,e] = os.path.split(f)
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if e == "" or e == "." or e == "..":
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return pathjoin(F(p), e)
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"""Copy a file to a backup.
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Backups are named in GNU-style, with a ~ suffix.
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If the file is already a backup, it's not copied.
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if has_symlinks() and os.path.islink(fn):
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target = os.readlink(fn)
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os.symlink(target, bfn)
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outf = file(bfn, 'wb')
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"""True if f is an accessible directory."""
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return S_ISDIR(os.lstat(f)[ST_MODE])
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"""True if f is a regular file."""
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return S_ISREG(os.lstat(f)[ST_MODE])
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"""True if f is a symlink."""
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return S_ISLNK(os.lstat(f)[ST_MODE])
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def is_inside(dir, fname):
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"""True if fname is inside dir.
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The parameters should typically be passed to osutils.normpath first, so
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that . and .. and repeated slashes are eliminated, and the separators
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are canonical for the platform.
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The empty string as a dir name is taken as top-of-tree and matches
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# XXX: Most callers of this can actually do something smarter by
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# looking at the inventory
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return fname.startswith(dir)
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def is_inside_any(dir_list, fname):
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"""True if fname is inside any of given dirs."""
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for dirname in dir_list:
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if is_inside(dirname, fname):
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def is_inside_or_parent_of_any(dir_list, fname):
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"""True if fname is a child or a parent of any of the given files."""
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for dirname in dir_list:
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if is_inside(dirname, fname) or is_inside(fname, dirname):
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def pumpfile(fromfile, tofile):
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"""Copy contents of one file to another."""
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b = fromfile.read(BUFSIZE)
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def file_iterator(input_file, readsize=32768):
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b = input_file.read(readsize)
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if getattr(f, 'tell', None) is not None:
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def sha_strings(strings, _factory=sha.new):
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"""Return the sha-1 of concatenation of strings"""
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map(s.update, strings)
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def sha_string(f, _factory=sha.new):
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return _factory(f).hexdigest()
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def fingerprint_file(f):
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return {'size': len(b),
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'sha1': sha.new(b).hexdigest()}
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def compare_files(a, b):
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"""Returns true if equal in contents"""
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def local_time_offset(t=None):
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"""Return offset of local zone from GMT, either at present or at time t."""
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offset = datetime.fromtimestamp(t) - datetime.utcfromtimestamp(t)
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return offset.days * 86400 + offset.seconds
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def format_date(t, offset=0, timezone='original', date_fmt=None,
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"""Return a formatted date string.
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:param t: Seconds since the epoch.
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:param offset: Timezone offset in seconds east of utc.
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:param timezone: How to display the time: 'utc', 'original' for the
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timezone specified by offset, or 'local' for the process's current
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:param show_offset: Whether to append the timezone.
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:param date_fmt: strftime format.
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if timezone == 'utc':
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elif timezone == 'original':
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tt = time.gmtime(t + offset)
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elif timezone == 'local':
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tt = time.localtime(t)
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offset = local_time_offset(t)
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raise errors.BzrError("unsupported timezone format %r" % timezone,
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['options are "utc", "original", "local"'])
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date_fmt = "%a %Y-%m-%d %H:%M:%S"
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offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
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return (time.strftime(date_fmt, tt) + offset_str)
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def compact_date(when):
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return time.strftime('%Y%m%d%H%M%S', time.gmtime(when))
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def format_delta(delta):
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"""Get a nice looking string for a time delta.
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:param delta: The time difference in seconds, can be positive or negative.
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positive indicates time in the past, negative indicates time in the
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future. (usually time.time() - stored_time)
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:return: String formatted to show approximate resolution
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direction = 'in the future'
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if seconds < 90: # print seconds up to 90 seconds
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return '%d second %s' % (seconds, direction,)
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return '%d seconds %s' % (seconds, direction)
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minutes = int(seconds / 60)
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seconds -= 60 * minutes
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if minutes < 90: # print minutes, seconds up to 90 minutes
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return '%d minute, %d second%s %s' % (
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minutes, seconds, plural_seconds, direction)
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return '%d minutes, %d second%s %s' % (
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minutes, seconds, plural_seconds, direction)
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hours = int(minutes / 60)
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minutes -= 60 * hours
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return '%d hour, %d minute%s %s' % (hours, minutes,
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plural_minutes, direction)
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return '%d hours, %d minute%s %s' % (hours, minutes,
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plural_minutes, direction)
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"""Return size of given open file."""
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return os.fstat(f.fileno())[ST_SIZE]
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# Define rand_bytes based on platform.
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# Python 2.4 and later have os.urandom,
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# but it doesn't work on some arches
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rand_bytes = os.urandom
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except (NotImplementedError, AttributeError):
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# If python doesn't have os.urandom, or it doesn't work,
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# then try to first pull random data from /dev/urandom
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rand_bytes = file('/dev/urandom', 'rb').read
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# Otherwise, use this hack as a last resort
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except (IOError, OSError):
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# not well seeded, but better than nothing
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s += chr(random.randint(0, 255))
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ALNUM = '0123456789abcdefghijklmnopqrstuvwxyz'
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"""Return a random string of num alphanumeric characters
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The result only contains lowercase chars because it may be used on
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case-insensitive filesystems.
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for raw_byte in rand_bytes(num):
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s += ALNUM[ord(raw_byte) % 36]
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## TODO: We could later have path objects that remember their list
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## decomposition (might be too tricksy though.)
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"""Turn string into list of parts."""
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assert isinstance(p, basestring)
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# split on either delimiter because people might use either on
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ps = re.split(r'[\\/]', p)
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raise errors.BzrError("sorry, %r not allowed in path" % f)
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elif (f == '.') or (f == ''):
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assert isinstance(p, (list, tuple))
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if (f == '..') or (f is None) or (f == ''):
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raise errors.BzrError("sorry, %r not allowed in path" % f)
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"""Split s into lines, but without removing the newline characters."""
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lines = s.split('\n')
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result = [line + '\n' for line in lines[:-1]]
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result.append(lines[-1])
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def hardlinks_good():
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return sys.platform not in ('win32', 'cygwin', 'darwin')
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def link_or_copy(src, dest):
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"""Hardlink a file, or copy it if it can't be hardlinked."""
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if not hardlinks_good():
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shutil.copyfile(src, dest)
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except (OSError, IOError), e:
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if e.errno != errno.EXDEV:
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shutil.copyfile(src, dest)
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# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
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# Forgiveness than Permission (EAFP) because:
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# - root can damage a solaris file system by using unlink,
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# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
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# EACCES, OSX: EPERM) when invoked on a directory.
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def delete_any(path):
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"""Delete a file or directory."""
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if isdir(path): # Takes care of symlinks
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if getattr(os, 'symlink', None) is not None:
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def contains_whitespace(s):
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"""True if there are any whitespace characters in s."""
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# string.whitespace can include '\xa0' in certain locales, because it is
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# considered "non-breaking-space" as part of ISO-8859-1. But it
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# 1) Isn't a breaking whitespace
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# 2) Isn't one of ' \t\r\n' which are characters we sometimes use as
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# 3) '\xa0' isn't unicode safe since it is >128.
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# This should *not* be a unicode set of characters in case the source
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# string is not a Unicode string. We can auto-up-cast the characters since
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# they are ascii, but we don't want to auto-up-cast the string in case it
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for ch in ' \t\n\r\v\f':
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def contains_linebreaks(s):
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"""True if there is any vertical whitespace in s."""
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def relpath(base, path):
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"""Return path relative to base, or raise exception.
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The path may be either an absolute path or a path relative to the
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current working directory.
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os.path.commonprefix (python2.4) has a bad bug that it works just
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on string prefixes, assuming that '/u' is a prefix of '/u2'. This
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assert len(base) >= MIN_ABS_PATHLENGTH, ('Length of base must be equal or'
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' exceed the platform minimum length (which is %d)' %
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while len(head) >= len(base):
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head, tail = os.path.split(head)
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raise errors.PathNotChild(rp, base)
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def safe_unicode(unicode_or_utf8_string):
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"""Coerce unicode_or_utf8_string into unicode.
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If it is unicode, it is returned.
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Otherwise it is decoded from utf-8. If a decoding error
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occurs, it is wrapped as a If the decoding fails, the exception is wrapped
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as a BzrBadParameter exception.
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if isinstance(unicode_or_utf8_string, unicode):
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return unicode_or_utf8_string
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return unicode_or_utf8_string.decode('utf8')
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except UnicodeDecodeError:
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raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
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def safe_utf8(unicode_or_utf8_string):
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"""Coerce unicode_or_utf8_string to a utf8 string.
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If it is a str, it is returned.
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If it is Unicode, it is encoded into a utf-8 string.
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if isinstance(unicode_or_utf8_string, str):
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# TODO: jam 20070209 This is overkill, and probably has an impact on
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# performance if we are dealing with lots of apis that want a
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# Make sure it is a valid utf-8 string
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unicode_or_utf8_string.decode('utf-8')
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except UnicodeDecodeError:
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raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
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return unicode_or_utf8_string
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return unicode_or_utf8_string.encode('utf-8')
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_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
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' Revision id generators should be creating utf8'
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def safe_revision_id(unicode_or_utf8_string, warn=True):
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"""Revision ids should now be utf8, but at one point they were unicode.
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:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
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:param warn: Functions that are sanitizing user data can set warn=False
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:return: None or a utf8 revision id.
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if (unicode_or_utf8_string is None
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or unicode_or_utf8_string.__class__ == str):
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return unicode_or_utf8_string
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symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
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return cache_utf8.encode(unicode_or_utf8_string)
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_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
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' generators should be creating utf8 file ids.')
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def safe_file_id(unicode_or_utf8_string, warn=True):
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"""File ids should now be utf8, but at one point they were unicode.
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This is the same as safe_utf8, except it uses the cached encode functions
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to save a little bit of performance.
940
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
942
:param warn: Functions that are sanitizing user data can set warn=False
943
:return: None or a utf8 file id.
945
if (unicode_or_utf8_string is None
946
or unicode_or_utf8_string.__class__ == str):
947
return unicode_or_utf8_string
949
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
951
return cache_utf8.encode(unicode_or_utf8_string)
954
_platform_normalizes_filenames = False
955
if sys.platform == 'darwin':
956
_platform_normalizes_filenames = True
959
def normalizes_filenames():
960
"""Return True if this platform normalizes unicode filenames.
962
Mac OSX does, Windows/Linux do not.
964
return _platform_normalizes_filenames
967
def _accessible_normalized_filename(path):
968
"""Get the unicode normalized path, and if you can access the file.
970
On platforms where the system normalizes filenames (Mac OSX),
971
you can access a file by any path which will normalize correctly.
972
On platforms where the system does not normalize filenames
973
(Windows, Linux), you have to access a file by its exact path.
975
Internally, bzr only supports NFC/NFKC normalization, since that is
976
the standard for XML documents.
978
So return the normalized path, and a flag indicating if the file
979
can be accessed by that path.
982
return unicodedata.normalize('NFKC', unicode(path)), True
985
def _inaccessible_normalized_filename(path):
986
__doc__ = _accessible_normalized_filename.__doc__
988
normalized = unicodedata.normalize('NFKC', unicode(path))
989
return normalized, normalized == path
992
if _platform_normalizes_filenames:
993
normalized_filename = _accessible_normalized_filename
995
normalized_filename = _inaccessible_normalized_filename
998
def terminal_width():
999
"""Return estimated terminal width."""
1000
if sys.platform == 'win32':
1001
return win32utils.get_console_size()[0]
1004
import struct, fcntl, termios
1005
s = struct.pack('HHHH', 0, 0, 0, 0)
1006
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1007
width = struct.unpack('HHHH', x)[1]
1012
width = int(os.environ['COLUMNS'])
1021
def supports_executable():
1022
return sys.platform != "win32"
1025
def supports_posix_readonly():
1026
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1028
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1029
directory controls creation/deletion, etc.
1031
And under win32, readonly means that the directory itself cannot be
1032
deleted. The contents of a readonly directory can be changed, unlike POSIX
1033
where files in readonly directories cannot be added, deleted or renamed.
1035
return sys.platform != "win32"
1038
def set_or_unset_env(env_variable, value):
1039
"""Modify the environment, setting or removing the env_variable.
1041
:param env_variable: The environment variable in question
1042
:param value: The value to set the environment to. If None, then
1043
the variable will be removed.
1044
:return: The original value of the environment variable.
1046
orig_val = os.environ.get(env_variable)
1048
if orig_val is not None:
1049
del os.environ[env_variable]
1051
if isinstance(value, unicode):
1052
value = value.encode(bzrlib.user_encoding)
1053
os.environ[env_variable] = value
1057
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1060
def check_legal_path(path):
1061
"""Check whether the supplied path is legal.
1062
This is only required on Windows, so we don't test on other platforms
1065
if sys.platform != "win32":
1067
if _validWin32PathRE.match(path) is None:
1068
raise errors.IllegalPath(path)
1071
def walkdirs(top, prefix=""):
1072
"""Yield data about all the directories in a tree.
1074
This yields all the data about the contents of a directory at a time.
1075
After each directory has been yielded, if the caller has mutated the list
1076
to exclude some directories, they are then not descended into.
1078
The data yielded is of the form:
1079
((directory-relpath, directory-path-from-top),
1080
[(relpath, basename, kind, lstat, path-from-top), ...]),
1081
- directory-relpath is the relative path of the directory being returned
1082
with respect to top. prefix is prepended to this.
1083
- directory-path-from-root is the path including top for this directory.
1084
It is suitable for use with os functions.
1085
- relpath is the relative path within the subtree being walked.
1086
- basename is the basename of the path
1087
- kind is the kind of the file now. If unknown then the file is not
1088
present within the tree - but it may be recorded as versioned. See
1090
- lstat is the stat data *if* the file was statted.
1091
- planned, not implemented:
1092
path_from_tree_root is the path from the root of the tree.
1094
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1095
allows one to walk a subtree but get paths that are relative to a tree
1097
:return: an iterator over the dirs.
1099
#TODO there is a bit of a smell where the results of the directory-
1100
# summary in this, and the path from the root, may not agree
1101
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1102
# potentially confusing output. We should make this more robust - but
1103
# not at a speed cost. RBC 20060731
1105
_directory = _directory_kind
1106
_listdir = os.listdir
1107
_kind_from_mode = _formats.get
1108
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1110
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1111
relroot, _, _, _, top = pending.pop()
1113
relprefix = relroot + u'/'
1116
top_slash = top + u'/'
1119
append = dirblock.append
1120
for name in sorted(_listdir(top)):
1121
abspath = top_slash + name
1122
statvalue = _lstat(abspath)
1123
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1124
append((relprefix + name, name, kind, statvalue, abspath))
1125
yield (relroot, top), dirblock
1127
# push the user specified dirs from dirblock
1128
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1131
def _walkdirs_utf8(top, prefix=""):
1132
"""Yield data about all the directories in a tree.
1134
This yields the same information as walkdirs() only each entry is yielded
1135
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1136
are returned as exact byte-strings.
1138
:return: yields a tuple of (dir_info, [file_info])
1139
dir_info is (utf8_relpath, path-from-top)
1140
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1141
if top is an absolute path, path-from-top is also an absolute path.
1142
path-from-top might be unicode or utf8, but it is the correct path to
1143
pass to os functions to affect the file in question. (such as os.lstat)
1145
fs_encoding = _fs_enc.upper()
1146
if (sys.platform == 'win32' or
1147
fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968')): # ascii
1148
return _walkdirs_unicode_to_utf8(top, prefix=prefix)
1150
return _walkdirs_fs_utf8(top, prefix=prefix)
1153
def _walkdirs_fs_utf8(top, prefix=""):
1154
"""See _walkdirs_utf8.
1156
This sub-function is called when we know the filesystem is already in utf8
1157
encoding. So we don't need to transcode filenames.
1160
_directory = _directory_kind
1161
_listdir = os.listdir
1162
_kind_from_mode = _formats.get
1164
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1165
# But we don't actually uses 1-3 in pending, so set them to None
1166
pending = [(safe_utf8(prefix), None, None, None, safe_utf8(top))]
1168
relroot, _, _, _, top = pending.pop()
1170
relprefix = relroot + '/'
1173
top_slash = top + '/'
1176
append = dirblock.append
1177
for name in sorted(_listdir(top)):
1178
abspath = top_slash + name
1179
statvalue = _lstat(abspath)
1180
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1181
append((relprefix + name, name, kind, statvalue, abspath))
1182
yield (relroot, top), dirblock
1184
# push the user specified dirs from dirblock
1185
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1188
def _walkdirs_unicode_to_utf8(top, prefix=""):
1189
"""See _walkdirs_utf8
1191
Because Win32 has a Unicode api, all of the 'path-from-top' entries will be
1193
This is currently the fallback code path when the filesystem encoding is
1194
not UTF-8. It may be better to implement an alternative so that we can
1195
safely handle paths that are not properly decodable in the current
1198
_utf8_encode = codecs.getencoder('utf8')
1200
_directory = _directory_kind
1201
_listdir = os.listdir
1202
_kind_from_mode = _formats.get
1204
pending = [(safe_utf8(prefix), None, None, None, safe_unicode(top))]
1206
relroot, _, _, _, top = pending.pop()
1208
relprefix = relroot + '/'
1211
top_slash = top + u'/'
1214
append = dirblock.append
1215
for name in sorted(_listdir(top)):
1216
name_utf8 = _utf8_encode(name)[0]
1217
abspath = top_slash + name
1218
statvalue = _lstat(abspath)
1219
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1220
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1221
yield (relroot, top), dirblock
1223
# push the user specified dirs from dirblock
1224
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1227
def copy_tree(from_path, to_path, handlers={}):
1228
"""Copy all of the entries in from_path into to_path.
1230
:param from_path: The base directory to copy.
1231
:param to_path: The target directory. If it does not exist, it will
1233
:param handlers: A dictionary of functions, which takes a source and
1234
destinations for files, directories, etc.
1235
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1236
'file', 'directory', and 'symlink' should always exist.
1237
If they are missing, they will be replaced with 'os.mkdir()',
1238
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1240
# Now, just copy the existing cached tree to the new location
1241
# We use a cheap trick here.
1242
# Absolute paths are prefixed with the first parameter
1243
# relative paths are prefixed with the second.
1244
# So we can get both the source and target returned
1245
# without any extra work.
1247
def copy_dir(source, dest):
1250
def copy_link(source, dest):
1251
"""Copy the contents of a symlink"""
1252
link_to = os.readlink(source)
1253
os.symlink(link_to, dest)
1255
real_handlers = {'file':shutil.copy2,
1256
'symlink':copy_link,
1257
'directory':copy_dir,
1259
real_handlers.update(handlers)
1261
if not os.path.exists(to_path):
1262
real_handlers['directory'](from_path, to_path)
1264
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1265
for relpath, name, kind, st, abspath in entries:
1266
real_handlers[kind](abspath, relpath)
1269
def path_prefix_key(path):
1270
"""Generate a prefix-order path key for path.
1272
This can be used to sort paths in the same way that walkdirs does.
1274
return (dirname(path) , path)
1277
def compare_paths_prefix_order(path_a, path_b):
1278
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1279
key_a = path_prefix_key(path_a)
1280
key_b = path_prefix_key(path_b)
1281
return cmp(key_a, key_b)
1284
_cached_user_encoding = None
1287
def get_user_encoding(use_cache=True):
1288
"""Find out what the preferred user encoding is.
1290
This is generally the encoding that is used for command line parameters
1291
and file contents. This may be different from the terminal encoding
1292
or the filesystem encoding.
1294
:param use_cache: Enable cache for detected encoding.
1295
(This parameter is turned on by default,
1296
and required only for selftesting)
1298
:return: A string defining the preferred user encoding
1300
global _cached_user_encoding
1301
if _cached_user_encoding is not None and use_cache:
1302
return _cached_user_encoding
1304
if sys.platform == 'darwin':
1305
# work around egregious python 2.4 bug
1306
sys.platform = 'posix'
1310
sys.platform = 'darwin'
1315
user_encoding = locale.getpreferredencoding()
1316
except locale.Error, e:
1317
sys.stderr.write('bzr: warning: %s\n'
1318
' Could not determine what text encoding to use.\n'
1319
' This error usually means your Python interpreter\n'
1320
' doesn\'t support the locale set by $LANG (%s)\n'
1321
" Continuing with ascii encoding.\n"
1322
% (e, os.environ.get('LANG')))
1323
user_encoding = 'ascii'
1325
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1326
# treat that as ASCII, and not support printing unicode characters to the
1328
if user_encoding in (None, 'cp0'):
1329
user_encoding = 'ascii'
1333
codecs.lookup(user_encoding)
1335
sys.stderr.write('bzr: warning:'
1336
' unknown encoding %s.'
1337
' Continuing with ascii encoding.\n'
1340
user_encoding = 'ascii'
1343
_cached_user_encoding = user_encoding
1345
return user_encoding
1348
def recv_all(socket, bytes):
1349
"""Receive an exact number of bytes.
1351
Regular Socket.recv() may return less than the requested number of bytes,
1352
dependning on what's in the OS buffer. MSG_WAITALL is not available
1353
on all platforms, but this should work everywhere. This will return
1354
less than the requested amount if the remote end closes.
1356
This isn't optimized and is intended mostly for use in testing.
1359
while len(b) < bytes:
1360
new = socket.recv(bytes - len(b))
1366
def dereference_path(path):
1367
"""Determine the real path to a file.
1369
All parent elements are dereferenced. But the file itself is not
1371
:param path: The original path. May be absolute or relative.
1372
:return: the real path *to* the file
1374
parent, base = os.path.split(path)
1375
# The pathjoin for '.' is a workaround for Python bug #1213894.
1376
# (initial path components aren't dereferenced)
1377
return pathjoin(realpath(pathjoin('.', parent)), base)
1380
def supports_mapi():
1381
"""Return True if we can use MAPI to launch a mail client."""
1382
return sys.platform == "win32"
added
removed
bzrlib/osutils.py
