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# Bazaar-NG -- distributed version control
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# Copyright (C) 2005 by Canonical Ltd
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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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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 errors import bailout, BzrError
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from trace import mutter
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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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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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os.chmod(filename, mod)
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mod = os.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 = os.stat(filename).st_mode
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os.chmod(filename, mod)
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_QUOTE_RE = re.compile(r'([^a-zA-Z0-9.,:/_~-])')
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mod = os.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 minimum_path_selection(paths):
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"""Return the smallset subset of paths which are outside paths.
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:param paths: A container (and hence not None) of paths.
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:return: A set of paths sufficient to include everything in paths via
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is_inside_any, drawn from the paths parameter.
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other_paths = paths.difference([path])
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if not is_inside_any(other_paths, path):
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# this is a top level path, we must check it.
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search_paths.add(path)
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"""Return shell-quoted filename"""
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## We could be a bit more terse by using double-quotes etc
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f = _QUOTE_RE.sub(r'\\\1', f)
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mode = os.lstat(f)[ST_MODE]
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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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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) in (errno.ENOENT, errno.ENOTDIR):
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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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elif kind == 'directory':
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elif kind == 'symlink':
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raise BzrError('invalid file kind %r' % 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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except (IOError, OSError), e:
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# source and target may be aliases of each other (e.g. on a
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# case-insensitive filesystem), so we may have accidentally renamed
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# source by when we tried to rename target
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if not (file_existed and e.errno in (None, errno.ENOENT)):
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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('NFC', 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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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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# python2.3 localtime() can't take None
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if time.localtime(t).tm_isdst and time.daylight:
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return -time.timezone
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def format_date(t, offset=0, timezone='original'):
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## TODO: Perhaps a global option to use either universal or local time?
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## Or perhaps just let people set $TZ?
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assert isinstance(t, float)
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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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weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
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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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tt = time.gmtime(t)
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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)
299
bailout("unsupported timezone format %r",
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['options are "utc", "original", "local"'])
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return (time.strftime("%a %Y-%m-%d %H:%M:%S", tt)
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+ ' %+03d%02d' % (offset / 3600, (offset / 60) % 60))
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raise errors.UnsupportedTimezoneFormat(timezone)
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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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# day of week depends on locale, so we do this ourself
678
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
679
return (time.strftime(date_fmt, tt) + offset_str)
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def compact_date(when):
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683
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.
690
positive indicates time in the past, negative indicates time in the
691
future. (usually time.time() - stored_time)
692
:return: String formatted to show approximate resolution
698
direction = 'in the future'
702
if seconds < 90: # print seconds up to 90 seconds
704
return '%d second %s' % (seconds, direction,)
706
return '%d seconds %s' % (seconds, direction)
708
minutes = int(seconds / 60)
709
seconds -= 60 * minutes
714
if minutes < 90: # print minutes, seconds up to 90 minutes
716
return '%d minute, %d second%s %s' % (
717
minutes, seconds, plural_seconds, direction)
719
return '%d minutes, %d second%s %s' % (
720
minutes, seconds, plural_seconds, direction)
722
hours = int(minutes / 60)
723
minutes -= 60 * hours
730
return '%d hour, %d minute%s %s' % (hours, minutes,
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plural_minutes, direction)
732
return '%d hours, %d minute%s %s' % (hours, minutes,
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plural_minutes, direction)
312
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"""Return size of given open file."""
313
737
return os.fstat(f.fileno())[ST_SIZE]
316
if hasattr(os, 'urandom'): # python 2.4 and later
740
# Define rand_bytes based on platform.
742
# Python 2.4 and later have os.urandom,
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# but it doesn't work on some arches
317
745
rand_bytes = os.urandom
318
elif sys.platform == 'linux2':
319
rand_bytes = file('/dev/urandom', 'rb').read
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# not well seeded, but better than nothing
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s += chr(random.randint(0, 255))
746
except (NotImplementedError, AttributeError):
747
# If python doesn't have os.urandom, or it doesn't work,
748
# then try to first pull random data from /dev/urandom
750
rand_bytes = file('/dev/urandom', 'rb').read
751
# Otherwise, use this hack as a last resort
752
except (IOError, OSError):
753
# not well seeded, but better than nothing
758
s += chr(random.randint(0, 255))
763
ALNUM = '0123456789abcdefghijklmnopqrstuvwxyz'
765
"""Return a random string of num alphanumeric characters
767
The result only contains lowercase chars because it may be used on
768
case-insensitive filesystems.
771
for raw_byte in rand_bytes(num):
772
s += ALNUM[ord(raw_byte) % 36]
331
776
## TODO: We could later have path objects that remember their list
332
777
## decomposition (might be too tricksy though.)
334
779
def splitpath(p):
335
"""Turn string into list of parts.
341
>>> splitpath('a/./b')
343
>>> splitpath('a/.b')
345
>>> splitpath('a/../b')
346
Traceback (most recent call last):
348
BzrError: ("sorry, '..' not allowed in path", [])
350
assert isinstance(p, types.StringTypes)
780
"""Turn string into list of parts."""
352
781
# split on either delimiter because people might use either on
354
783
ps = re.split(r'[\\/]', p)
367
assert isinstance(p, list)
369
if (f == '..') or (f == None) or (f == ''):
370
bailout("sorry, %r not allowed in path" % f)
371
return os.path.join(*p)
374
def appendpath(p1, p2):
378
return os.path.join(p1, p2)
381
def extern_command(cmd, ignore_errors = False):
382
mutter('external command: %s' % `cmd`)
384
if not ignore_errors:
385
bailout('command failed')
797
if (f == '..') or (f is None) or (f == ''):
798
raise errors.BzrError("sorry, %r not allowed in path" % f)
803
"""Split s into lines, but without removing the newline characters."""
804
lines = s.split('\n')
805
result = [line + '\n' for line in lines[:-1]]
807
result.append(lines[-1])
811
def hardlinks_good():
812
return sys.platform not in ('win32', 'cygwin', 'darwin')
815
def link_or_copy(src, dest):
816
"""Hardlink a file, or copy it if it can't be hardlinked."""
817
if not hardlinks_good():
818
shutil.copyfile(src, dest)
822
except (OSError, IOError), e:
823
if e.errno != errno.EXDEV:
825
shutil.copyfile(src, dest)
828
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
829
# Forgiveness than Permission (EAFP) because:
830
# - root can damage a solaris file system by using unlink,
831
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
832
# EACCES, OSX: EPERM) when invoked on a directory.
833
def delete_any(path):
834
"""Delete a file or directory."""
835
if isdir(path): # Takes care of symlinks
842
if getattr(os, 'symlink', None) is not None:
849
if getattr(os, 'link', None) is not None:
855
def host_os_dereferences_symlinks():
856
return (has_symlinks()
857
and sys.platform not in ('cygwin', 'win32'))
860
def contains_whitespace(s):
861
"""True if there are any whitespace characters in s."""
862
# string.whitespace can include '\xa0' in certain locales, because it is
863
# considered "non-breaking-space" as part of ISO-8859-1. But it
864
# 1) Isn't a breaking whitespace
865
# 2) Isn't one of ' \t\r\n' which are characters we sometimes use as
867
# 3) '\xa0' isn't unicode safe since it is >128.
869
# This should *not* be a unicode set of characters in case the source
870
# string is not a Unicode string. We can auto-up-cast the characters since
871
# they are ascii, but we don't want to auto-up-cast the string in case it
873
for ch in ' \t\n\r\v\f':
880
def contains_linebreaks(s):
881
"""True if there is any vertical whitespace in s."""
889
def relpath(base, path):
890
"""Return path relative to base, or raise exception.
892
The path may be either an absolute path or a path relative to the
893
current working directory.
895
os.path.commonprefix (python2.4) has a bad bug that it works just
896
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
900
if len(base) < MIN_ABS_PATHLENGTH:
901
# must have space for e.g. a drive letter
902
raise ValueError('%r is too short to calculate a relative path'
909
while len(head) >= len(base):
912
head, tail = os.path.split(head)
916
raise errors.PathNotChild(rp, base)
924
def safe_unicode(unicode_or_utf8_string):
925
"""Coerce unicode_or_utf8_string into unicode.
927
If it is unicode, it is returned.
928
Otherwise it is decoded from utf-8. If a decoding error
929
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
930
as a BzrBadParameter exception.
932
if isinstance(unicode_or_utf8_string, unicode):
933
return unicode_or_utf8_string
935
return unicode_or_utf8_string.decode('utf8')
936
except UnicodeDecodeError:
937
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
940
def safe_utf8(unicode_or_utf8_string):
941
"""Coerce unicode_or_utf8_string to a utf8 string.
943
If it is a str, it is returned.
944
If it is Unicode, it is encoded into a utf-8 string.
946
if isinstance(unicode_or_utf8_string, str):
947
# TODO: jam 20070209 This is overkill, and probably has an impact on
948
# performance if we are dealing with lots of apis that want a
951
# Make sure it is a valid utf-8 string
952
unicode_or_utf8_string.decode('utf-8')
953
except UnicodeDecodeError:
954
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
955
return unicode_or_utf8_string
956
return unicode_or_utf8_string.encode('utf-8')
959
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
960
' Revision id generators should be creating utf8'
964
def safe_revision_id(unicode_or_utf8_string, warn=True):
965
"""Revision ids should now be utf8, but at one point they were unicode.
967
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
969
:param warn: Functions that are sanitizing user data can set warn=False
970
:return: None or a utf8 revision id.
972
if (unicode_or_utf8_string is None
973
or unicode_or_utf8_string.__class__ == str):
974
return unicode_or_utf8_string
976
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
978
return cache_utf8.encode(unicode_or_utf8_string)
981
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
982
' generators should be creating utf8 file ids.')
985
def safe_file_id(unicode_or_utf8_string, warn=True):
986
"""File ids should now be utf8, but at one point they were unicode.
988
This is the same as safe_utf8, except it uses the cached encode functions
989
to save a little bit of performance.
991
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
993
:param warn: Functions that are sanitizing user data can set warn=False
994
:return: None or a utf8 file id.
996
if (unicode_or_utf8_string is None
997
or unicode_or_utf8_string.__class__ == str):
998
return unicode_or_utf8_string
1000
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1002
return cache_utf8.encode(unicode_or_utf8_string)
1005
_platform_normalizes_filenames = False
1006
if sys.platform == 'darwin':
1007
_platform_normalizes_filenames = True
1010
def normalizes_filenames():
1011
"""Return True if this platform normalizes unicode filenames.
1013
Mac OSX does, Windows/Linux do not.
1015
return _platform_normalizes_filenames
1018
def _accessible_normalized_filename(path):
1019
"""Get the unicode normalized path, and if you can access the file.
1021
On platforms where the system normalizes filenames (Mac OSX),
1022
you can access a file by any path which will normalize correctly.
1023
On platforms where the system does not normalize filenames
1024
(Windows, Linux), you have to access a file by its exact path.
1026
Internally, bzr only supports NFC normalization, since that is
1027
the standard for XML documents.
1029
So return the normalized path, and a flag indicating if the file
1030
can be accessed by that path.
1033
return unicodedata.normalize('NFC', unicode(path)), True
1036
def _inaccessible_normalized_filename(path):
1037
__doc__ = _accessible_normalized_filename.__doc__
1039
normalized = unicodedata.normalize('NFC', unicode(path))
1040
return normalized, normalized == path
1043
if _platform_normalizes_filenames:
1044
normalized_filename = _accessible_normalized_filename
1046
normalized_filename = _inaccessible_normalized_filename
1049
def terminal_width():
1050
"""Return estimated terminal width."""
1051
if sys.platform == 'win32':
1052
return win32utils.get_console_size()[0]
1055
import struct, fcntl, termios
1056
s = struct.pack('HHHH', 0, 0, 0, 0)
1057
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1058
width = struct.unpack('HHHH', x)[1]
1063
width = int(os.environ['COLUMNS'])
1072
def supports_executable():
1073
return sys.platform != "win32"
1076
def supports_posix_readonly():
1077
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1079
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1080
directory controls creation/deletion, etc.
1082
And under win32, readonly means that the directory itself cannot be
1083
deleted. The contents of a readonly directory can be changed, unlike POSIX
1084
where files in readonly directories cannot be added, deleted or renamed.
1086
return sys.platform != "win32"
1089
def set_or_unset_env(env_variable, value):
1090
"""Modify the environment, setting or removing the env_variable.
1092
:param env_variable: The environment variable in question
1093
:param value: The value to set the environment to. If None, then
1094
the variable will be removed.
1095
:return: The original value of the environment variable.
1097
orig_val = os.environ.get(env_variable)
1099
if orig_val is not None:
1100
del os.environ[env_variable]
1102
if isinstance(value, unicode):
1103
value = value.encode(bzrlib.user_encoding)
1104
os.environ[env_variable] = value
1108
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1111
def check_legal_path(path):
1112
"""Check whether the supplied path is legal.
1113
This is only required on Windows, so we don't test on other platforms
1116
if sys.platform != "win32":
1118
if _validWin32PathRE.match(path) is None:
1119
raise errors.IllegalPath(path)
1122
def walkdirs(top, prefix=""):
1123
"""Yield data about all the directories in a tree.
1125
This yields all the data about the contents of a directory at a time.
1126
After each directory has been yielded, if the caller has mutated the list
1127
to exclude some directories, they are then not descended into.
1129
The data yielded is of the form:
1130
((directory-relpath, directory-path-from-top),
1131
[(relpath, basename, kind, lstat, path-from-top), ...]),
1132
- directory-relpath is the relative path of the directory being returned
1133
with respect to top. prefix is prepended to this.
1134
- directory-path-from-root is the path including top for this directory.
1135
It is suitable for use with os functions.
1136
- relpath is the relative path within the subtree being walked.
1137
- basename is the basename of the path
1138
- kind is the kind of the file now. If unknown then the file is not
1139
present within the tree - but it may be recorded as versioned. See
1141
- lstat is the stat data *if* the file was statted.
1142
- planned, not implemented:
1143
path_from_tree_root is the path from the root of the tree.
1145
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1146
allows one to walk a subtree but get paths that are relative to a tree
1148
:return: an iterator over the dirs.
1150
#TODO there is a bit of a smell where the results of the directory-
1151
# summary in this, and the path from the root, may not agree
1152
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1153
# potentially confusing output. We should make this more robust - but
1154
# not at a speed cost. RBC 20060731
1156
_directory = _directory_kind
1157
_listdir = os.listdir
1158
_kind_from_mode = _formats.get
1159
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1161
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1162
relroot, _, _, _, top = pending.pop()
1164
relprefix = relroot + u'/'
1167
top_slash = top + u'/'
1170
append = dirblock.append
1171
for name in sorted(_listdir(top)):
1172
abspath = top_slash + name
1173
statvalue = _lstat(abspath)
1174
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1175
append((relprefix + name, name, kind, statvalue, abspath))
1176
yield (relroot, top), dirblock
1178
# push the user specified dirs from dirblock
1179
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1182
_real_walkdirs_utf8 = None
1184
def _walkdirs_utf8(top, prefix=""):
1185
"""Yield data about all the directories in a tree.
1187
This yields the same information as walkdirs() only each entry is yielded
1188
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1189
are returned as exact byte-strings.
1191
:return: yields a tuple of (dir_info, [file_info])
1192
dir_info is (utf8_relpath, path-from-top)
1193
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1194
if top is an absolute path, path-from-top is also an absolute path.
1195
path-from-top might be unicode or utf8, but it is the correct path to
1196
pass to os functions to affect the file in question. (such as os.lstat)
1198
global _real_walkdirs_utf8
1199
if _real_walkdirs_utf8 is None:
1200
fs_encoding = _fs_enc.upper()
1201
if win32utils.winver == 'Windows NT':
1202
# Win98 doesn't have unicode apis like FindFirstFileW
1203
# TODO: We possibly could support Win98 by falling back to the
1204
# original FindFirstFile, and using TCHAR instead of WCHAR,
1205
# but that gets a bit tricky, and requires custom compiling
1208
from bzrlib._walkdirs_win32 import _walkdirs_utf8_win32_find_file
1210
_real_walkdirs_utf8 = _walkdirs_unicode_to_utf8
1212
_real_walkdirs_utf8 = _walkdirs_utf8_win32_find_file
1213
elif fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1214
# ANSI_X3.4-1968 is a form of ASCII
1215
_real_walkdirs_utf8 = _walkdirs_unicode_to_utf8
1217
_real_walkdirs_utf8 = _walkdirs_fs_utf8
1218
return _real_walkdirs_utf8(top, prefix=prefix)
1221
def _walkdirs_fs_utf8(top, prefix=""):
1222
"""See _walkdirs_utf8.
1224
This sub-function is called when we know the filesystem is already in utf8
1225
encoding. So we don't need to transcode filenames.
1228
_directory = _directory_kind
1229
_listdir = os.listdir
1230
_kind_from_mode = _formats.get
1232
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1233
# But we don't actually uses 1-3 in pending, so set them to None
1234
pending = [(safe_utf8(prefix), None, None, None, safe_utf8(top))]
1236
relroot, _, _, _, top = pending.pop()
1238
relprefix = relroot + '/'
1241
top_slash = top + '/'
1244
append = dirblock.append
1245
for name in sorted(_listdir(top)):
1246
abspath = top_slash + name
1247
statvalue = _lstat(abspath)
1248
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1249
append((relprefix + name, name, kind, statvalue, abspath))
1250
yield (relroot, top), dirblock
1252
# push the user specified dirs from dirblock
1253
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1256
def _walkdirs_unicode_to_utf8(top, prefix=""):
1257
"""See _walkdirs_utf8
1259
Because Win32 has a Unicode api, all of the 'path-from-top' entries will be
1261
This is currently the fallback code path when the filesystem encoding is
1262
not UTF-8. It may be better to implement an alternative so that we can
1263
safely handle paths that are not properly decodable in the current
1266
_utf8_encode = codecs.getencoder('utf8')
1268
_directory = _directory_kind
1269
_listdir = os.listdir
1270
_kind_from_mode = _formats.get
1272
pending = [(safe_utf8(prefix), None, None, None, safe_unicode(top))]
1274
relroot, _, _, _, top = pending.pop()
1276
relprefix = relroot + '/'
1279
top_slash = top + u'/'
1282
append = dirblock.append
1283
for name in sorted(_listdir(top)):
1284
name_utf8 = _utf8_encode(name)[0]
1285
abspath = top_slash + name
1286
statvalue = _lstat(abspath)
1287
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1288
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1289
yield (relroot, top), dirblock
1291
# push the user specified dirs from dirblock
1292
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1295
def copy_tree(from_path, to_path, handlers={}):
1296
"""Copy all of the entries in from_path into to_path.
1298
:param from_path: The base directory to copy.
1299
:param to_path: The target directory. If it does not exist, it will
1301
:param handlers: A dictionary of functions, which takes a source and
1302
destinations for files, directories, etc.
1303
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1304
'file', 'directory', and 'symlink' should always exist.
1305
If they are missing, they will be replaced with 'os.mkdir()',
1306
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1308
# Now, just copy the existing cached tree to the new location
1309
# We use a cheap trick here.
1310
# Absolute paths are prefixed with the first parameter
1311
# relative paths are prefixed with the second.
1312
# So we can get both the source and target returned
1313
# without any extra work.
1315
def copy_dir(source, dest):
1318
def copy_link(source, dest):
1319
"""Copy the contents of a symlink"""
1320
link_to = os.readlink(source)
1321
os.symlink(link_to, dest)
1323
real_handlers = {'file':shutil.copy2,
1324
'symlink':copy_link,
1325
'directory':copy_dir,
1327
real_handlers.update(handlers)
1329
if not os.path.exists(to_path):
1330
real_handlers['directory'](from_path, to_path)
1332
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1333
for relpath, name, kind, st, abspath in entries:
1334
real_handlers[kind](abspath, relpath)
1337
def path_prefix_key(path):
1338
"""Generate a prefix-order path key for path.
1340
This can be used to sort paths in the same way that walkdirs does.
1342
return (dirname(path) , path)
1345
def compare_paths_prefix_order(path_a, path_b):
1346
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1347
key_a = path_prefix_key(path_a)
1348
key_b = path_prefix_key(path_b)
1349
return cmp(key_a, key_b)
1352
_cached_user_encoding = None
1355
def get_user_encoding(use_cache=True):
1356
"""Find out what the preferred user encoding is.
1358
This is generally the encoding that is used for command line parameters
1359
and file contents. This may be different from the terminal encoding
1360
or the filesystem encoding.
1362
:param use_cache: Enable cache for detected encoding.
1363
(This parameter is turned on by default,
1364
and required only for selftesting)
1366
:return: A string defining the preferred user encoding
1368
global _cached_user_encoding
1369
if _cached_user_encoding is not None and use_cache:
1370
return _cached_user_encoding
1372
if sys.platform == 'darwin':
1373
# work around egregious python 2.4 bug
1374
sys.platform = 'posix'
1378
sys.platform = 'darwin'
1383
user_encoding = locale.getpreferredencoding()
1384
except locale.Error, e:
1385
sys.stderr.write('bzr: warning: %s\n'
1386
' Could not determine what text encoding to use.\n'
1387
' This error usually means your Python interpreter\n'
1388
' doesn\'t support the locale set by $LANG (%s)\n'
1389
" Continuing with ascii encoding.\n"
1390
% (e, os.environ.get('LANG')))
1391
user_encoding = 'ascii'
1393
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1394
# treat that as ASCII, and not support printing unicode characters to the
1397
# For python scripts run under vim, we get '', so also treat that as ASCII
1398
if user_encoding in (None, 'cp0', ''):
1399
user_encoding = 'ascii'
1403
codecs.lookup(user_encoding)
1405
sys.stderr.write('bzr: warning:'
1406
' unknown encoding %s.'
1407
' Continuing with ascii encoding.\n'
1410
user_encoding = 'ascii'
1413
_cached_user_encoding = user_encoding
1415
return user_encoding
1418
def recv_all(socket, bytes):
1419
"""Receive an exact number of bytes.
1421
Regular Socket.recv() may return less than the requested number of bytes,
1422
dependning on what's in the OS buffer. MSG_WAITALL is not available
1423
on all platforms, but this should work everywhere. This will return
1424
less than the requested amount if the remote end closes.
1426
This isn't optimized and is intended mostly for use in testing.
1429
while len(b) < bytes:
1430
new = socket.recv(bytes - len(b))
1437
def send_all(socket, bytes):
1438
"""Send all bytes on a socket.
1440
Regular socket.sendall() can give socket error 10053 on Windows. This
1441
implementation sends no more than 64k at a time, which avoids this problem.
1444
for pos in xrange(0, len(bytes), chunk_size):
1445
socket.sendall(bytes[pos:pos+chunk_size])
1448
def dereference_path(path):
1449
"""Determine the real path to a file.
1451
All parent elements are dereferenced. But the file itself is not
1453
:param path: The original path. May be absolute or relative.
1454
:return: the real path *to* the file
1456
parent, base = os.path.split(path)
1457
# The pathjoin for '.' is a workaround for Python bug #1213894.
1458
# (initial path components aren't dereferenced)
1459
return pathjoin(realpath(pathjoin('.', parent)), base)
1462
def supports_mapi():
1463
"""Return True if we can use MAPI to launch a mail client."""
1464
return sys.platform == "win32"
1467
def resource_string(package, resource_name):
1468
"""Load a resource from a package and return it as a string.
1470
Note: Only packages that start with bzrlib are currently supported.
1472
This is designed to be a lightweight implementation of resource
1473
loading in a way which is API compatible with the same API from
1475
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
1476
If and when pkg_resources becomes a standard library, this routine
1479
# Check package name is within bzrlib
1480
if package == "bzrlib":
1481
resource_relpath = resource_name
1482
elif package.startswith("bzrlib."):
1483
package = package[len("bzrlib."):].replace('.', os.sep)
1484
resource_relpath = pathjoin(package, resource_name)
1486
raise errors.BzrError('resource package %s not in bzrlib' % package)
1488
# Map the resource to a file and read its contents
1489
base = dirname(bzrlib.__file__)
1490
if getattr(sys, 'frozen', None): # bzr.exe
1491
base = abspath(pathjoin(base, '..', '..'))
1492
filename = pathjoin(base, resource_relpath)
1493
return open(filename, 'rU').read()
added
removed
bzrlib/osutils.py
