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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 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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# sha and md5 modules are deprecated in python2.6 but hashlib is available as
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if sys.version_info < (2, 5):
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import md5 as _mod_md5
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import sha as _mod_sha
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from bzrlib import symbol_versioning
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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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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.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 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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"""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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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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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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if win32utils.winver == 'Windows 98':
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abspath = _win98_abspath
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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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osutils.get_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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from bzrlib.trace import mutter
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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 = get_user_encoding()
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mutter('encoding stdout as osutils.get_user_encoding() %r',
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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 = get_user_encoding()
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mutter('cp0 is invalid encoding.'
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' encoding stdout as osutils.get_user_encoding() %r',
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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, get_user_encoding())
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output_encoding = get_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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"""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(from_file, to_file, read_length=-1, buff_size=32768):
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"""Copy contents of one file to another.
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The read_length can either be -1 to read to end-of-file (EOF) or
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it can specify the maximum number of bytes to read.
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The buff_size represents the maximum size for each read operation
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performed on from_file.
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:return: The number of bytes copied.
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# read specified number of bytes
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while read_length > 0:
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num_bytes_to_read = min(read_length, buff_size)
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block = from_file.read(num_bytes_to_read)
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actual_bytes_read = len(block)
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read_length -= actual_bytes_read
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length += actual_bytes_read
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block = from_file.read(buff_size)
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def pump_string_file(bytes, file_handle, segment_size=None):
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"""Write bytes to file_handle in many smaller writes.
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:param bytes: The string to write.
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:param file_handle: The file to write to.
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# Write data in chunks rather than all at once, because very large
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# writes fail on some platforms (e.g. Windows with SMB mounted
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segment_size = 5242880 # 5MB
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segments = range(len(bytes) / segment_size + 1)
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write = file_handle.write
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for segment_index in segments:
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segment = buffer(bytes, segment_index * segment_size, segment_size)
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def file_iterator(input_file, readsize=32768):
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b = input_file.read(readsize)
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"""Calculate the hexdigest of an open file.
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The file cursor should be already at the start.
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def sha_file_by_name(fname):
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"""Calculate the SHA1 of a file by reading the full text"""
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f = os.open(fname, os.O_RDONLY | O_BINARY)
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b = os.read(f, 1<<16)
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def sha_strings(strings, _factory=sha):
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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):
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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(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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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 date_fmt: strftime format.
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:param show_offset: Whether to append the timezone.
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(date_fmt, tt, offset_str) = \
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_format_date(t, offset, timezone, date_fmt, show_offset)
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date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
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date_str = time.strftime(date_fmt, tt)
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return date_str + offset_str
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def format_local_date(t, offset=0, timezone='original', date_fmt=None,
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"""Return an unicode date string formatted according to the current locale.
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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 date_fmt: strftime format.
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:param show_offset: Whether to append the timezone.
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(date_fmt, tt, offset_str) = \
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_format_date(t, offset, timezone, date_fmt, show_offset)
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date_str = time.strftime(date_fmt, tt)
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if not isinstance(date_str, unicode):
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date_str = date_str.decode(bzrlib.user_encoding, 'replace')
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return date_str + offset_str
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def _format_date(t, offset, timezone, date_fmt, show_offset):
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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.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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return (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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# 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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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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from bzrlib._chunks_to_lines_pyx import chunks_to_lines
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from bzrlib._chunks_to_lines_py import chunks_to_lines
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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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if getattr(os, 'link', None) is not None:
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def host_os_dereferences_symlinks():
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return (has_symlinks()
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and sys.platform not in ('cygwin', 'win32'))
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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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if len(base) < MIN_ABS_PATHLENGTH:
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# must have space for e.g. a drive letter
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raise ValueError('%r is too short to calculate a relative path'
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while len(head) >= len(base):
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head, tail = os.path.split(head)
943
raise errors.PathNotChild(rp, base)
951
def safe_unicode(unicode_or_utf8_string):
952
"""Coerce unicode_or_utf8_string into unicode.
954
If it is unicode, it is returned.
955
Otherwise it is decoded from utf-8. If a decoding error
956
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
957
as a BzrBadParameter exception.
959
if isinstance(unicode_or_utf8_string, unicode):
960
return unicode_or_utf8_string
962
return unicode_or_utf8_string.decode('utf8')
963
except UnicodeDecodeError:
964
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
967
def safe_utf8(unicode_or_utf8_string):
968
"""Coerce unicode_or_utf8_string to a utf8 string.
970
If it is a str, it is returned.
971
If it is Unicode, it is encoded into a utf-8 string.
973
if isinstance(unicode_or_utf8_string, str):
974
# TODO: jam 20070209 This is overkill, and probably has an impact on
975
# performance if we are dealing with lots of apis that want a
978
# Make sure it is a valid utf-8 string
979
unicode_or_utf8_string.decode('utf-8')
980
except UnicodeDecodeError:
981
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
982
return unicode_or_utf8_string
983
return unicode_or_utf8_string.encode('utf-8')
986
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
987
' Revision id generators should be creating utf8'
991
def safe_revision_id(unicode_or_utf8_string, warn=True):
992
"""Revision ids should now be utf8, but at one point they were unicode.
994
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
996
:param warn: Functions that are sanitizing user data can set warn=False
997
:return: None or a utf8 revision id.
999
if (unicode_or_utf8_string is None
1000
or unicode_or_utf8_string.__class__ == str):
1001
return unicode_or_utf8_string
1003
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1005
return cache_utf8.encode(unicode_or_utf8_string)
1008
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1009
' generators should be creating utf8 file ids.')
1012
def safe_file_id(unicode_or_utf8_string, warn=True):
1013
"""File ids should now be utf8, but at one point they were unicode.
1015
This is the same as safe_utf8, except it uses the cached encode functions
1016
to save a little bit of performance.
1018
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1020
:param warn: Functions that are sanitizing user data can set warn=False
1021
:return: None or a utf8 file id.
1023
if (unicode_or_utf8_string is None
1024
or unicode_or_utf8_string.__class__ == str):
1025
return unicode_or_utf8_string
1027
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1029
return cache_utf8.encode(unicode_or_utf8_string)
1032
_platform_normalizes_filenames = False
1033
if sys.platform == 'darwin':
1034
_platform_normalizes_filenames = True
1037
def normalizes_filenames():
1038
"""Return True if this platform normalizes unicode filenames.
1040
Mac OSX does, Windows/Linux do not.
1042
return _platform_normalizes_filenames
1045
def _accessible_normalized_filename(path):
1046
"""Get the unicode normalized path, and if you can access the file.
1048
On platforms where the system normalizes filenames (Mac OSX),
1049
you can access a file by any path which will normalize correctly.
1050
On platforms where the system does not normalize filenames
1051
(Windows, Linux), you have to access a file by its exact path.
1053
Internally, bzr only supports NFC normalization, since that is
1054
the standard for XML documents.
1056
So return the normalized path, and a flag indicating if the file
1057
can be accessed by that path.
1060
return unicodedata.normalize('NFC', unicode(path)), True
1063
def _inaccessible_normalized_filename(path):
1064
__doc__ = _accessible_normalized_filename.__doc__
1066
normalized = unicodedata.normalize('NFC', unicode(path))
1067
return normalized, normalized == path
1070
if _platform_normalizes_filenames:
1071
normalized_filename = _accessible_normalized_filename
1073
normalized_filename = _inaccessible_normalized_filename
1076
def terminal_width():
1077
"""Return estimated terminal width."""
1078
if sys.platform == 'win32':
1079
return win32utils.get_console_size()[0]
1082
import struct, fcntl, termios
1083
s = struct.pack('HHHH', 0, 0, 0, 0)
1084
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1085
width = struct.unpack('HHHH', x)[1]
1090
width = int(os.environ['COLUMNS'])
1099
def supports_executable():
1100
return sys.platform != "win32"
1103
def supports_posix_readonly():
1104
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1106
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1107
directory controls creation/deletion, etc.
1109
And under win32, readonly means that the directory itself cannot be
1110
deleted. The contents of a readonly directory can be changed, unlike POSIX
1111
where files in readonly directories cannot be added, deleted or renamed.
1113
return sys.platform != "win32"
1116
def set_or_unset_env(env_variable, value):
1117
"""Modify the environment, setting or removing the env_variable.
1119
:param env_variable: The environment variable in question
1120
:param value: The value to set the environment to. If None, then
1121
the variable will be removed.
1122
:return: The original value of the environment variable.
1124
orig_val = os.environ.get(env_variable)
1126
if orig_val is not None:
1127
del os.environ[env_variable]
1129
if isinstance(value, unicode):
1130
value = value.encode(get_user_encoding())
1131
os.environ[env_variable] = value
1135
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1138
def check_legal_path(path):
1139
"""Check whether the supplied path is legal.
1140
This is only required on Windows, so we don't test on other platforms
1143
if sys.platform != "win32":
1145
if _validWin32PathRE.match(path) is None:
1146
raise errors.IllegalPath(path)
1149
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1151
def _is_error_enotdir(e):
1152
"""Check if this exception represents ENOTDIR.
1154
Unfortunately, python is very inconsistent about the exception
1155
here. The cases are:
1156
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1157
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1158
which is the windows error code.
1159
3) Windows, Python2.5 uses errno == EINVAL and
1160
winerror == ERROR_DIRECTORY
1162
:param e: An Exception object (expected to be OSError with an errno
1163
attribute, but we should be able to cope with anything)
1164
:return: True if this represents an ENOTDIR error. False otherwise.
1166
en = getattr(e, 'errno', None)
1167
if (en == errno.ENOTDIR
1168
or (sys.platform == 'win32'
1169
and (en == _WIN32_ERROR_DIRECTORY
1170
or (en == errno.EINVAL
1171
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1177
def walkdirs(top, prefix=""):
1178
"""Yield data about all the directories in a tree.
1180
This yields all the data about the contents of a directory at a time.
1181
After each directory has been yielded, if the caller has mutated the list
1182
to exclude some directories, they are then not descended into.
1184
The data yielded is of the form:
1185
((directory-relpath, directory-path-from-top),
1186
[(relpath, basename, kind, lstat, path-from-top), ...]),
1187
- directory-relpath is the relative path of the directory being returned
1188
with respect to top. prefix is prepended to this.
1189
- directory-path-from-root is the path including top for this directory.
1190
It is suitable for use with os functions.
1191
- relpath is the relative path within the subtree being walked.
1192
- basename is the basename of the path
1193
- kind is the kind of the file now. If unknown then the file is not
1194
present within the tree - but it may be recorded as versioned. See
1196
- lstat is the stat data *if* the file was statted.
1197
- planned, not implemented:
1198
path_from_tree_root is the path from the root of the tree.
1200
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1201
allows one to walk a subtree but get paths that are relative to a tree
1203
:return: an iterator over the dirs.
1205
#TODO there is a bit of a smell where the results of the directory-
1206
# summary in this, and the path from the root, may not agree
1207
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1208
# potentially confusing output. We should make this more robust - but
1209
# not at a speed cost. RBC 20060731
1211
_directory = _directory_kind
1212
_listdir = os.listdir
1213
_kind_from_mode = file_kind_from_stat_mode
1214
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1216
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1217
relroot, _, _, _, top = pending.pop()
1219
relprefix = relroot + u'/'
1222
top_slash = top + u'/'
1225
append = dirblock.append
1227
names = sorted(_listdir(top))
1229
if not _is_error_enotdir(e):
1233
abspath = top_slash + name
1234
statvalue = _lstat(abspath)
1235
kind = _kind_from_mode(statvalue.st_mode)
1236
append((relprefix + name, name, kind, statvalue, abspath))
1237
yield (relroot, top), dirblock
1239
# push the user specified dirs from dirblock
1240
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1243
class DirReader(object):
1244
"""An interface for reading directories."""
1246
def top_prefix_to_starting_dir(self, top, prefix=""):
1247
"""Converts top and prefix to a starting dir entry
1249
:param top: A utf8 path
1250
:param prefix: An optional utf8 path to prefix output relative paths
1252
:return: A tuple starting with prefix, and ending with the native
1255
raise NotImplementedError(self.top_prefix_to_starting_dir)
1257
def read_dir(self, prefix, top):
1258
"""Read a specific dir.
1260
:param prefix: A utf8 prefix to be preprended to the path basenames.
1261
:param top: A natively encoded path to read.
1262
:return: A list of the directories contents. Each item contains:
1263
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1265
raise NotImplementedError(self.read_dir)
1268
_selected_dir_reader = None
1271
def _walkdirs_utf8(top, prefix=""):
1272
"""Yield data about all the directories in a tree.
1274
This yields the same information as walkdirs() only each entry is yielded
1275
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1276
are returned as exact byte-strings.
1278
:return: yields a tuple of (dir_info, [file_info])
1279
dir_info is (utf8_relpath, path-from-top)
1280
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1281
if top is an absolute path, path-from-top is also an absolute path.
1282
path-from-top might be unicode or utf8, but it is the correct path to
1283
pass to os functions to affect the file in question. (such as os.lstat)
1285
global _selected_dir_reader
1286
if _selected_dir_reader is None:
1287
fs_encoding = _fs_enc.upper()
1288
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1289
# Win98 doesn't have unicode apis like FindFirstFileW
1290
# TODO: We possibly could support Win98 by falling back to the
1291
# original FindFirstFile, and using TCHAR instead of WCHAR,
1292
# but that gets a bit tricky, and requires custom compiling
1295
from bzrlib._walkdirs_win32 import Win32ReadDir
1297
_selected_dir_reader = UnicodeDirReader()
1299
_selected_dir_reader = Win32ReadDir()
1300
elif fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1301
# ANSI_X3.4-1968 is a form of ASCII
1302
_selected_dir_reader = UnicodeDirReader()
1305
from bzrlib._readdir_pyx import UTF8DirReader
1307
# No optimised code path
1308
_selected_dir_reader = UnicodeDirReader()
1310
_selected_dir_reader = UTF8DirReader()
1311
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1312
# But we don't actually uses 1-3 in pending, so set them to None
1313
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1314
read_dir = _selected_dir_reader.read_dir
1315
_directory = _directory_kind
1317
relroot, _, _, _, top = pending[-1].pop()
1320
dirblock = sorted(read_dir(relroot, top))
1321
yield (relroot, top), dirblock
1322
# push the user specified dirs from dirblock
1323
next = [d for d in reversed(dirblock) if d[2] == _directory]
1325
pending.append(next)
1328
class UnicodeDirReader(DirReader):
1329
"""A dir reader for non-utf8 file systems, which transcodes."""
1331
__slots__ = ['_utf8_encode']
1334
self._utf8_encode = codecs.getencoder('utf8')
1336
def top_prefix_to_starting_dir(self, top, prefix=""):
1337
"""See DirReader.top_prefix_to_starting_dir."""
1338
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1340
def read_dir(self, prefix, top):
1341
"""Read a single directory from a non-utf8 file system.
1343
top, and the abspath element in the output are unicode, all other paths
1344
are utf8. Local disk IO is done via unicode calls to listdir etc.
1346
This is currently the fallback code path when the filesystem encoding is
1347
not UTF-8. It may be better to implement an alternative so that we can
1348
safely handle paths that are not properly decodable in the current
1351
See DirReader.read_dir for details.
1353
_utf8_encode = self._utf8_encode
1355
_listdir = os.listdir
1356
_kind_from_mode = file_kind_from_stat_mode
1359
relprefix = prefix + '/'
1362
top_slash = top + u'/'
1365
append = dirblock.append
1366
for name in sorted(_listdir(top)):
1368
name_utf8 = _utf8_encode(name)[0]
1369
except UnicodeDecodeError:
1370
raise errors.BadFilenameEncoding(
1371
_utf8_encode(relprefix)[0] + name, _fs_enc)
1372
abspath = top_slash + name
1373
statvalue = _lstat(abspath)
1374
kind = _kind_from_mode(statvalue.st_mode)
1375
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1379
def copy_tree(from_path, to_path, handlers={}):
1380
"""Copy all of the entries in from_path into to_path.
1382
:param from_path: The base directory to copy.
1383
:param to_path: The target directory. If it does not exist, it will
1385
:param handlers: A dictionary of functions, which takes a source and
1386
destinations for files, directories, etc.
1387
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1388
'file', 'directory', and 'symlink' should always exist.
1389
If they are missing, they will be replaced with 'os.mkdir()',
1390
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1392
# Now, just copy the existing cached tree to the new location
1393
# We use a cheap trick here.
1394
# Absolute paths are prefixed with the first parameter
1395
# relative paths are prefixed with the second.
1396
# So we can get both the source and target returned
1397
# without any extra work.
1399
def copy_dir(source, dest):
1402
def copy_link(source, dest):
1403
"""Copy the contents of a symlink"""
1404
link_to = os.readlink(source)
1405
os.symlink(link_to, dest)
1407
real_handlers = {'file':shutil.copy2,
1408
'symlink':copy_link,
1409
'directory':copy_dir,
1411
real_handlers.update(handlers)
1413
if not os.path.exists(to_path):
1414
real_handlers['directory'](from_path, to_path)
1416
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1417
for relpath, name, kind, st, abspath in entries:
1418
real_handlers[kind](abspath, relpath)
1421
def path_prefix_key(path):
1422
"""Generate a prefix-order path key for path.
1424
This can be used to sort paths in the same way that walkdirs does.
1426
return (dirname(path) , path)
1429
def compare_paths_prefix_order(path_a, path_b):
1430
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1431
key_a = path_prefix_key(path_a)
1432
key_b = path_prefix_key(path_b)
1433
return cmp(key_a, key_b)
1436
_cached_user_encoding = None
1439
def get_user_encoding(use_cache=True):
1440
"""Find out what the preferred user encoding is.
1442
This is generally the encoding that is used for command line parameters
1443
and file contents. This may be different from the terminal encoding
1444
or the filesystem encoding.
1446
:param use_cache: Enable cache for detected encoding.
1447
(This parameter is turned on by default,
1448
and required only for selftesting)
1450
:return: A string defining the preferred user encoding
1452
global _cached_user_encoding
1453
if _cached_user_encoding is not None and use_cache:
1454
return _cached_user_encoding
1456
if sys.platform == 'darwin':
1457
# python locale.getpreferredencoding() always return
1458
# 'mac-roman' on darwin. That's a lie.
1459
sys.platform = 'posix'
1461
if os.environ.get('LANG', None) is None:
1462
# If LANG is not set, we end up with 'ascii', which is bad
1463
# ('mac-roman' is more than ascii), so we set a default which
1464
# will give us UTF-8 (which appears to work in all cases on
1465
# OSX). Users are still free to override LANG of course, as
1466
# long as it give us something meaningful. This work-around
1467
# *may* not be needed with python 3k and/or OSX 10.5, but will
1468
# work with them too -- vila 20080908
1469
os.environ['LANG'] = 'en_US.UTF-8'
1472
sys.platform = 'darwin'
1477
user_encoding = locale.getpreferredencoding()
1478
except locale.Error, e:
1479
sys.stderr.write('bzr: warning: %s\n'
1480
' Could not determine what text encoding to use.\n'
1481
' This error usually means your Python interpreter\n'
1482
' doesn\'t support the locale set by $LANG (%s)\n'
1483
" Continuing with ascii encoding.\n"
1484
% (e, os.environ.get('LANG')))
1485
user_encoding = 'ascii'
1487
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1488
# treat that as ASCII, and not support printing unicode characters to the
1491
# For python scripts run under vim, we get '', so also treat that as ASCII
1492
if user_encoding in (None, 'cp0', ''):
1493
user_encoding = 'ascii'
1497
codecs.lookup(user_encoding)
1499
sys.stderr.write('bzr: warning:'
1500
' unknown encoding %s.'
1501
' Continuing with ascii encoding.\n'
1504
user_encoding = 'ascii'
1507
_cached_user_encoding = user_encoding
1509
return user_encoding
1512
def get_host_name():
1513
"""Return the current unicode host name.
1515
This is meant to be used in place of socket.gethostname() because that
1516
behaves inconsistently on different platforms.
1518
if sys.platform == "win32":
1520
return win32utils.get_host_name()
1523
return socket.gethostname().decode(get_user_encoding())
1526
def recv_all(socket, bytes):
1527
"""Receive an exact number of bytes.
1529
Regular Socket.recv() may return less than the requested number of bytes,
1530
dependning on what's in the OS buffer. MSG_WAITALL is not available
1531
on all platforms, but this should work everywhere. This will return
1532
less than the requested amount if the remote end closes.
1534
This isn't optimized and is intended mostly for use in testing.
1537
while len(b) < bytes:
1538
new = socket.recv(bytes - len(b))
1545
def send_all(socket, bytes):
1546
"""Send all bytes on a socket.
1548
Regular socket.sendall() can give socket error 10053 on Windows. This
1549
implementation sends no more than 64k at a time, which avoids this problem.
1552
for pos in xrange(0, len(bytes), chunk_size):
1553
socket.sendall(bytes[pos:pos+chunk_size])
1556
def dereference_path(path):
1557
"""Determine the real path to a file.
1559
All parent elements are dereferenced. But the file itself is not
1561
:param path: The original path. May be absolute or relative.
1562
:return: the real path *to* the file
1564
parent, base = os.path.split(path)
1565
# The pathjoin for '.' is a workaround for Python bug #1213894.
1566
# (initial path components aren't dereferenced)
1567
return pathjoin(realpath(pathjoin('.', parent)), base)
1570
def supports_mapi():
1571
"""Return True if we can use MAPI to launch a mail client."""
1572
return sys.platform == "win32"
1575
def resource_string(package, resource_name):
1576
"""Load a resource from a package and return it as a string.
1578
Note: Only packages that start with bzrlib are currently supported.
1580
This is designed to be a lightweight implementation of resource
1581
loading in a way which is API compatible with the same API from
1583
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
1584
If and when pkg_resources becomes a standard library, this routine
1587
# Check package name is within bzrlib
1588
if package == "bzrlib":
1589
resource_relpath = resource_name
1590
elif package.startswith("bzrlib."):
1591
package = package[len("bzrlib."):].replace('.', os.sep)
1592
resource_relpath = pathjoin(package, resource_name)
1594
raise errors.BzrError('resource package %s not in bzrlib' % package)
1596
# Map the resource to a file and read its contents
1597
base = dirname(bzrlib.__file__)
1598
if getattr(sys, 'frozen', None): # bzr.exe
1599
base = abspath(pathjoin(base, '..', '..'))
1600
filename = pathjoin(base, resource_relpath)
1601
return open(filename, 'rU').read()
1604
def file_kind_from_stat_mode_thunk(mode):
1605
global file_kind_from_stat_mode
1606
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
1608
from bzrlib._readdir_pyx import UTF8DirReader
1609
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
1611
from bzrlib._readdir_py import (
1612
_kind_from_mode as file_kind_from_stat_mode
1614
return file_kind_from_stat_mode(mode)
1615
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1618
def file_kind(f, _lstat=os.lstat):
1620
return file_kind_from_stat_mode(_lstat(f).st_mode)
1622
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1623
raise errors.NoSuchFile(f)
1626
if sys.platform == "win32":
1629
return msvcrt.getch()
1634
fd = sys.stdin.fileno()
1635
settings = termios.tcgetattr(fd)
1638
ch = sys.stdin.read(1)
1640
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
added
removed
bzrlib/osutils.py
