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# Bazaar-NG -- distributed version control
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# Bazaar -- distributed version control
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# Copyright (C) 2005 by 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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import os, types, re, time, errno, sys
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from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
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from cStringIO import StringIO
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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 os import listdir
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from shutil import copyfile
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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.errors import BzrError
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from bzrlib.errors import (BzrError,
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BzrBadParameterNotUnicode,
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from bzrlib.symbol_versioning import (deprecated_function,
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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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def make_readonly(filename):
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"""Make a filename read-only."""
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# TODO: probably needs to be fixed for windows
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mod = os.stat(filename).st_mode
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mod = mod & 0777555
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os.chmod(filename, mod)
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mode = os.lstat(f)[ST_MODE]
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raise BzrError("can't handle file kind with mode %o of %r" % (mode, 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 bzrlib.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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def kind_marker(kind):
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if kind == 'file':
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elif kind == 'directory':
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elif kind == _directory_kind:
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elif kind == 'symlink':
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raise BzrError('invalid file kind %r' % kind)
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lexists = getattr(os.path, 'lexists', None)
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if hasattr(os, 'lstat'):
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if e.errno == errno.ENOENT:
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raise 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 (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 == 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 (not hasattr(e, 'errno')
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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()
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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 _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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mkdtemp = tempfile.mkdtemp
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dirname = os.path.dirname
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basename = os.path.basename
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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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type_, value = excinfo[:2]
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if function in (os.remove, os.rmdir) \
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and type_ == OSError \
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and value.errno == errno.EACCES:
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bzrlib.osutils.make_writable(path)
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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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return output_encoding
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def normalizepath(f):
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if hasattr(os.path, 'realpath'):
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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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def backup_file(fn):
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'sha1': s.hexdigest()}
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"""Return per-user configuration directory.
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By default this is ~/.bzr.conf/
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TODO: Global option --config-dir to override this.
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return os.path.expanduser("~/.bzr.conf")
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"""Calculate automatic user identification.
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Returns (realname, email).
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Only used when none is set in the environment or the id file.
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This previously used the FQDN as the default domain, but that can
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be very slow on machines where DNS is broken. So now we simply
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# XXX: Any good way to get real user name on win32?
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w = pwd.getpwuid(uid)
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gecos = w.pw_gecos.decode(bzrlib.user_encoding)
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username = w.pw_name.decode(bzrlib.user_encoding)
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comma = gecos.find(',')
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realname = gecos[:comma]
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realname = username = getpass.getuser().decode(bzrlib.user_encoding)
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return realname, (username + '@' + socket.gethostname())
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def _get_user_id(branch):
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"""Return the full user id from a file or environment variable.
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e.g. "John Hacker <jhacker@foo.org>"
281
A branch to use for a per-branch configuration, or None.
283
The following are searched in order:
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2. .bzr/email for this branch.
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v = os.environ.get('BZREMAIL')
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return v.decode(bzrlib.user_encoding)
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return (branch.controlfile("email", "r")
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.decode(bzrlib.user_encoding)
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if e.errno != errno.ENOENT:
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return (open(os.path.join(config_dir(), "email"))
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.decode(bzrlib.user_encoding)
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if e.errno != errno.ENOENT:
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v = os.environ.get('EMAIL')
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return v.decode(bzrlib.user_encoding)
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def username(branch):
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"""Return email-style username.
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Something similar to 'Martin Pool <mbp@sourcefrog.net>'
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TODO: Check it's reasonably well-formed.
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v = _get_user_id(branch)
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name, email = _auto_user_id()
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return '%s <%s>' % (name, email)
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def user_email(branch):
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"""Return just the email component of a username."""
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e = _get_user_id(branch)
344
m = re.search(r'[\w+.-]+@[\w+.-]+', e)
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raise BzrError("%r doesn't seem to contain a reasonable email address" % e)
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return _auto_user_id()[1]
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def compare_files(a, b):
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"""Returns true if equal in contents"""
464
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if (f == '..') or (f == None) or (f == ''):
465
680
raise BzrError("sorry, %r not allowed in path" % f)
466
return os.path.join(*p)
684
@deprecated_function(zero_nine)
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685
def appendpath(p1, p2):
473
return os.path.join(p1, p2)
476
def extern_command(cmd, ignore_errors = False):
477
mutter('external command: %s' % `cmd`)
479
if not ignore_errors:
480
raise BzrError('command failed')
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def _read_config_value(name):
484
"""Read a config value from the file ~/.bzr.conf/<name>
485
Return None if the file does not exist"""
487
f = file(os.path.join(config_dir(), name), "r")
488
return f.read().decode(bzrlib.user_encoding).rstrip("\r\n")
490
if e.errno == errno.ENOENT:
689
return pathjoin(p1, p2)
693
"""Split s into lines, but without removing the newline characters."""
694
lines = s.split('\n')
695
result = [line + '\n' for line in lines[:-1]]
697
result.append(lines[-1])
701
def hardlinks_good():
702
return sys.platform not in ('win32', 'cygwin', 'darwin')
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def link_or_copy(src, dest):
706
"""Hardlink a file, or copy it if it can't be hardlinked."""
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if not hardlinks_good():
712
except (OSError, IOError), e:
713
if e.errno != errno.EXDEV:
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def delete_any(full_path):
718
"""Delete a file or directory."""
722
# We may be renaming a dangling inventory id
723
if e.errno not in (errno.EISDIR, errno.EACCES, errno.EPERM):
729
if hasattr(os, 'symlink'):
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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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for ch in string.whitespace:
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def contains_linebreaks(s):
745
"""True if there is any vertical whitespace in s."""
753
def relpath(base, path):
754
"""Return path relative to base, or raise exception.
756
The path may be either an absolute path or a path relative to the
757
current working directory.
759
os.path.commonprefix (python2.4) has a bad bug that it works just
760
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'
765
' exceed the platform minimum length (which is %d)' %
772
while len(head) >= len(base):
775
head, tail = os.path.split(head)
779
raise PathNotChild(rp, base)
787
def safe_unicode(unicode_or_utf8_string):
788
"""Coerce unicode_or_utf8_string into unicode.
790
If it is unicode, it is returned.
791
Otherwise it is decoded from utf-8. If a decoding error
792
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
793
as a BzrBadParameter exception.
795
if isinstance(unicode_or_utf8_string, unicode):
796
return unicode_or_utf8_string
798
return unicode_or_utf8_string.decode('utf8')
799
except UnicodeDecodeError:
800
raise BzrBadParameterNotUnicode(unicode_or_utf8_string)
803
_platform_normalizes_filenames = False
804
if sys.platform == 'darwin':
805
_platform_normalizes_filenames = True
808
def normalizes_filenames():
809
"""Return True if this platform normalizes unicode filenames.
811
Mac OSX does, Windows/Linux do not.
813
return _platform_normalizes_filenames
816
def _accessible_normalized_filename(path):
817
"""Get the unicode normalized path, and if you can access the file.
819
On platforms where the system normalizes filenames (Mac OSX),
820
you can access a file by any path which will normalize correctly.
821
On platforms where the system does not normalize filenames
822
(Windows, Linux), you have to access a file by its exact path.
824
Internally, bzr only supports NFC/NFKC normalization, since that is
825
the standard for XML documents.
827
So return the normalized path, and a flag indicating if the file
828
can be accessed by that path.
831
return unicodedata.normalize('NFKC', unicode(path)), True
834
def _inaccessible_normalized_filename(path):
835
__doc__ = _accessible_normalized_filename.__doc__
837
normalized = unicodedata.normalize('NFKC', unicode(path))
838
return normalized, normalized == path
841
if _platform_normalizes_filenames:
842
normalized_filename = _accessible_normalized_filename
844
normalized_filename = _inaccessible_normalized_filename
847
def terminal_width():
848
"""Return estimated terminal width."""
849
if sys.platform == 'win32':
850
import bzrlib.win32console
851
return bzrlib.win32console.get_console_size()[0]
854
import struct, fcntl, termios
855
s = struct.pack('HHHH', 0, 0, 0, 0)
856
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
857
width = struct.unpack('HHHH', x)[1]
862
width = int(os.environ['COLUMNS'])
870
def supports_executable():
871
return sys.platform != "win32"
874
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
877
def check_legal_path(path):
878
"""Check whether the supplied path is legal.
879
This is only required on Windows, so we don't test on other platforms
882
if sys.platform != "win32":
884
if _validWin32PathRE.match(path) is None:
885
raise IllegalPath(path)
888
def walkdirs(top, prefix=""):
889
"""Yield data about all the directories in a tree.
891
This yields all the data about the contents of a directory at a time.
892
After each directory has been yielded, if the caller has mutated the list
893
to exclude some directories, they are then not descended into.
895
The data yielded is of the form:
896
((directory-relpath, directory-path-from-top),
897
[(relpath, basename, kind, lstat), ...]),
898
- directory-relpath is the relative path of the directory being returned
899
with respect to top. prefix is prepended to this.
900
- directory-path-from-root is the path including top for this directory.
901
It is suitable for use with os functions.
902
- relpath is the relative path within the subtree being walked.
903
- basename is the basename of the path
904
- kind is the kind of the file now. If unknown then the file is not
905
present within the tree - but it may be recorded as versioned. See
907
- lstat is the stat data *if* the file was statted.
908
- planned, not implemented:
909
path_from_tree_root is the path from the root of the tree.
911
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
912
allows one to walk a subtree but get paths that are relative to a tree
914
:return: an iterator over the dirs.
916
#TODO there is a bit of a smell where the results of the directory-
917
# summary in this, and the path from the root, may not agree
918
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
919
# potentially confusing output. We should make this more robust - but
920
# not at a speed cost. RBC 20060731
923
_directory = _directory_kind
925
pending = [(prefix, "", _directory, None, top)]
928
currentdir = pending.pop()
929
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
932
relroot = currentdir[0] + '/'
935
for name in sorted(_listdir(top)):
936
abspath = top + '/' + name
937
statvalue = lstat(abspath)
938
dirblock.append((relroot + name, name,
939
file_kind_from_stat_mode(statvalue.st_mode),
941
yield (currentdir[0], top), dirblock
942
# push the user specified dirs from dirblock
943
for dir in reversed(dirblock):
944
if dir[2] == _directory:
948
def copy_tree(from_path, to_path, handlers={}):
949
"""Copy all of the entries in from_path into to_path.
951
:param from_path: The base directory to copy.
952
:param to_path: The target directory. If it does not exist, it will
954
:param handlers: A dictionary of functions, which takes a source and
955
destinations for files, directories, etc.
956
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
957
'file', 'directory', and 'symlink' should always exist.
958
If they are missing, they will be replaced with 'os.mkdir()',
959
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
961
# Now, just copy the existing cached tree to the new location
962
# We use a cheap trick here.
963
# Absolute paths are prefixed with the first parameter
964
# relative paths are prefixed with the second.
965
# So we can get both the source and target returned
966
# without any extra work.
968
def copy_dir(source, dest):
971
def copy_link(source, dest):
972
"""Copy the contents of a symlink"""
973
link_to = os.readlink(source)
974
os.symlink(link_to, dest)
976
real_handlers = {'file':shutil.copy2,
978
'directory':copy_dir,
980
real_handlers.update(handlers)
982
if not os.path.exists(to_path):
983
real_handlers['directory'](from_path, to_path)
985
for dir_info, entries in walkdirs(from_path, prefix=to_path):
986
for relpath, name, kind, st, abspath in entries:
987
real_handlers[kind](abspath, relpath)
990
def path_prefix_key(path):
991
"""Generate a prefix-order path key for path.
993
This can be used to sort paths in the same way that walkdirs does.
995
return (dirname(path) , path)
998
def compare_paths_prefix_order(path_a, path_b):
999
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1000
key_a = path_prefix_key(path_a)
1001
key_b = path_prefix_key(path_b)
1002
return cmp(key_a, key_b)
added
removed
bzrlib/osutils.py
