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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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# Trivially convert a fulltext into a 'chunked' representation, and let
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# chunks_to_lines do the heavy lifting.
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if isinstance(s, str):
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# chunks_to_lines only supports 8-bit strings
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return chunks_to_lines([s])
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return _split_lines(s)
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"""Split s into lines, but without removing the newline characters.
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This supports Unicode or plain string objects.
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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.
936
os.path.commonprefix (python2.4) has a bad bug that it works just
937
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
941
if len(base) < MIN_ABS_PATHLENGTH:
942
# must have space for e.g. a drive letter
943
raise ValueError('%r is too short to calculate a relative path'
950
while len(head) >= len(base):
953
head, tail = os.path.split(head)
957
raise errors.PathNotChild(rp, base)
965
def safe_unicode(unicode_or_utf8_string):
966
"""Coerce unicode_or_utf8_string into unicode.
968
If it is unicode, it is returned.
969
Otherwise it is decoded from utf-8. If a decoding error
970
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
971
as a BzrBadParameter exception.
973
if isinstance(unicode_or_utf8_string, unicode):
974
return unicode_or_utf8_string
976
return unicode_or_utf8_string.decode('utf8')
977
except UnicodeDecodeError:
978
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
981
def safe_utf8(unicode_or_utf8_string):
982
"""Coerce unicode_or_utf8_string to a utf8 string.
984
If it is a str, it is returned.
985
If it is Unicode, it is encoded into a utf-8 string.
987
if isinstance(unicode_or_utf8_string, str):
988
# TODO: jam 20070209 This is overkill, and probably has an impact on
989
# performance if we are dealing with lots of apis that want a
992
# Make sure it is a valid utf-8 string
993
unicode_or_utf8_string.decode('utf-8')
994
except UnicodeDecodeError:
995
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
996
return unicode_or_utf8_string
997
return unicode_or_utf8_string.encode('utf-8')
1000
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1001
' Revision id generators should be creating utf8'
1005
def safe_revision_id(unicode_or_utf8_string, warn=True):
1006
"""Revision ids should now be utf8, but at one point they were unicode.
1008
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1010
:param warn: Functions that are sanitizing user data can set warn=False
1011
:return: None or a utf8 revision id.
1013
if (unicode_or_utf8_string is None
1014
or unicode_or_utf8_string.__class__ == str):
1015
return unicode_or_utf8_string
1017
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1019
return cache_utf8.encode(unicode_or_utf8_string)
1022
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1023
' generators should be creating utf8 file ids.')
1026
def safe_file_id(unicode_or_utf8_string, warn=True):
1027
"""File ids should now be utf8, but at one point they were unicode.
1029
This is the same as safe_utf8, except it uses the cached encode functions
1030
to save a little bit of performance.
1032
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1034
:param warn: Functions that are sanitizing user data can set warn=False
1035
:return: None or a utf8 file id.
1037
if (unicode_or_utf8_string is None
1038
or unicode_or_utf8_string.__class__ == str):
1039
return unicode_or_utf8_string
1041
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1043
return cache_utf8.encode(unicode_or_utf8_string)
1046
_platform_normalizes_filenames = False
1047
if sys.platform == 'darwin':
1048
_platform_normalizes_filenames = True
1051
def normalizes_filenames():
1052
"""Return True if this platform normalizes unicode filenames.
1054
Mac OSX does, Windows/Linux do not.
1056
return _platform_normalizes_filenames
1059
def _accessible_normalized_filename(path):
1060
"""Get the unicode normalized path, and if you can access the file.
1062
On platforms where the system normalizes filenames (Mac OSX),
1063
you can access a file by any path which will normalize correctly.
1064
On platforms where the system does not normalize filenames
1065
(Windows, Linux), you have to access a file by its exact path.
1067
Internally, bzr only supports NFC normalization, since that is
1068
the standard for XML documents.
1070
So return the normalized path, and a flag indicating if the file
1071
can be accessed by that path.
1074
return unicodedata.normalize('NFC', unicode(path)), True
1077
def _inaccessible_normalized_filename(path):
1078
__doc__ = _accessible_normalized_filename.__doc__
1080
normalized = unicodedata.normalize('NFC', unicode(path))
1081
return normalized, normalized == path
1084
if _platform_normalizes_filenames:
1085
normalized_filename = _accessible_normalized_filename
1087
normalized_filename = _inaccessible_normalized_filename
1090
def terminal_width():
1091
"""Return estimated terminal width."""
1092
if sys.platform == 'win32':
1093
return win32utils.get_console_size()[0]
1096
import struct, fcntl, termios
1097
s = struct.pack('HHHH', 0, 0, 0, 0)
1098
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1099
width = struct.unpack('HHHH', x)[1]
1104
width = int(os.environ['COLUMNS'])
1113
def supports_executable():
1114
return sys.platform != "win32"
1117
def supports_posix_readonly():
1118
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1120
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1121
directory controls creation/deletion, etc.
1123
And under win32, readonly means that the directory itself cannot be
1124
deleted. The contents of a readonly directory can be changed, unlike POSIX
1125
where files in readonly directories cannot be added, deleted or renamed.
1127
return sys.platform != "win32"
1130
def set_or_unset_env(env_variable, value):
1131
"""Modify the environment, setting or removing the env_variable.
1133
:param env_variable: The environment variable in question
1134
:param value: The value to set the environment to. If None, then
1135
the variable will be removed.
1136
:return: The original value of the environment variable.
1138
orig_val = os.environ.get(env_variable)
1140
if orig_val is not None:
1141
del os.environ[env_variable]
1143
if isinstance(value, unicode):
1144
value = value.encode(get_user_encoding())
1145
os.environ[env_variable] = value
1149
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1152
def check_legal_path(path):
1153
"""Check whether the supplied path is legal.
1154
This is only required on Windows, so we don't test on other platforms
1157
if sys.platform != "win32":
1159
if _validWin32PathRE.match(path) is None:
1160
raise errors.IllegalPath(path)
1163
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1165
def _is_error_enotdir(e):
1166
"""Check if this exception represents ENOTDIR.
1168
Unfortunately, python is very inconsistent about the exception
1169
here. The cases are:
1170
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1171
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1172
which is the windows error code.
1173
3) Windows, Python2.5 uses errno == EINVAL and
1174
winerror == ERROR_DIRECTORY
1176
:param e: An Exception object (expected to be OSError with an errno
1177
attribute, but we should be able to cope with anything)
1178
:return: True if this represents an ENOTDIR error. False otherwise.
1180
en = getattr(e, 'errno', None)
1181
if (en == errno.ENOTDIR
1182
or (sys.platform == 'win32'
1183
and (en == _WIN32_ERROR_DIRECTORY
1184
or (en == errno.EINVAL
1185
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1191
def walkdirs(top, prefix=""):
1192
"""Yield data about all the directories in a tree.
1194
This yields all the data about the contents of a directory at a time.
1195
After each directory has been yielded, if the caller has mutated the list
1196
to exclude some directories, they are then not descended into.
1198
The data yielded is of the form:
1199
((directory-relpath, directory-path-from-top),
1200
[(relpath, basename, kind, lstat, path-from-top), ...]),
1201
- directory-relpath is the relative path of the directory being returned
1202
with respect to top. prefix is prepended to this.
1203
- directory-path-from-root is the path including top for this directory.
1204
It is suitable for use with os functions.
1205
- relpath is the relative path within the subtree being walked.
1206
- basename is the basename of the path
1207
- kind is the kind of the file now. If unknown then the file is not
1208
present within the tree - but it may be recorded as versioned. See
1210
- lstat is the stat data *if* the file was statted.
1211
- planned, not implemented:
1212
path_from_tree_root is the path from the root of the tree.
1214
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1215
allows one to walk a subtree but get paths that are relative to a tree
1217
:return: an iterator over the dirs.
1219
#TODO there is a bit of a smell where the results of the directory-
1220
# summary in this, and the path from the root, may not agree
1221
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1222
# potentially confusing output. We should make this more robust - but
1223
# not at a speed cost. RBC 20060731
1225
_directory = _directory_kind
1226
_listdir = os.listdir
1227
_kind_from_mode = file_kind_from_stat_mode
1228
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1230
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1231
relroot, _, _, _, top = pending.pop()
1233
relprefix = relroot + u'/'
1236
top_slash = top + u'/'
1239
append = dirblock.append
1241
names = sorted(_listdir(top))
1243
if not _is_error_enotdir(e):
1247
abspath = top_slash + name
1248
statvalue = _lstat(abspath)
1249
kind = _kind_from_mode(statvalue.st_mode)
1250
append((relprefix + name, name, kind, statvalue, abspath))
1251
yield (relroot, top), dirblock
1253
# push the user specified dirs from dirblock
1254
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1257
class DirReader(object):
1258
"""An interface for reading directories."""
1260
def top_prefix_to_starting_dir(self, top, prefix=""):
1261
"""Converts top and prefix to a starting dir entry
1263
:param top: A utf8 path
1264
:param prefix: An optional utf8 path to prefix output relative paths
1266
:return: A tuple starting with prefix, and ending with the native
1269
raise NotImplementedError(self.top_prefix_to_starting_dir)
1271
def read_dir(self, prefix, top):
1272
"""Read a specific dir.
1274
:param prefix: A utf8 prefix to be preprended to the path basenames.
1275
:param top: A natively encoded path to read.
1276
:return: A list of the directories contents. Each item contains:
1277
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1279
raise NotImplementedError(self.read_dir)
1282
_selected_dir_reader = None
1285
def _walkdirs_utf8(top, prefix=""):
1286
"""Yield data about all the directories in a tree.
1288
This yields the same information as walkdirs() only each entry is yielded
1289
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1290
are returned as exact byte-strings.
1292
:return: yields a tuple of (dir_info, [file_info])
1293
dir_info is (utf8_relpath, path-from-top)
1294
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1295
if top is an absolute path, path-from-top is also an absolute path.
1296
path-from-top might be unicode or utf8, but it is the correct path to
1297
pass to os functions to affect the file in question. (such as os.lstat)
1299
global _selected_dir_reader
1300
if _selected_dir_reader is None:
1301
fs_encoding = _fs_enc.upper()
1302
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1303
# Win98 doesn't have unicode apis like FindFirstFileW
1304
# TODO: We possibly could support Win98 by falling back to the
1305
# original FindFirstFile, and using TCHAR instead of WCHAR,
1306
# but that gets a bit tricky, and requires custom compiling
1309
from bzrlib._walkdirs_win32 import Win32ReadDir
1311
_selected_dir_reader = UnicodeDirReader()
1313
_selected_dir_reader = Win32ReadDir()
1314
elif fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1315
# ANSI_X3.4-1968 is a form of ASCII
1316
_selected_dir_reader = UnicodeDirReader()
1319
from bzrlib._readdir_pyx import UTF8DirReader
1321
# No optimised code path
1322
_selected_dir_reader = UnicodeDirReader()
1324
_selected_dir_reader = UTF8DirReader()
1325
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1326
# But we don't actually uses 1-3 in pending, so set them to None
1327
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1328
read_dir = _selected_dir_reader.read_dir
1329
_directory = _directory_kind
1331
relroot, _, _, _, top = pending[-1].pop()
1334
dirblock = sorted(read_dir(relroot, top))
1335
yield (relroot, top), dirblock
1336
# push the user specified dirs from dirblock
1337
next = [d for d in reversed(dirblock) if d[2] == _directory]
1339
pending.append(next)
1342
class UnicodeDirReader(DirReader):
1343
"""A dir reader for non-utf8 file systems, which transcodes."""
1345
__slots__ = ['_utf8_encode']
1348
self._utf8_encode = codecs.getencoder('utf8')
1350
def top_prefix_to_starting_dir(self, top, prefix=""):
1351
"""See DirReader.top_prefix_to_starting_dir."""
1352
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1354
def read_dir(self, prefix, top):
1355
"""Read a single directory from a non-utf8 file system.
1357
top, and the abspath element in the output are unicode, all other paths
1358
are utf8. Local disk IO is done via unicode calls to listdir etc.
1360
This is currently the fallback code path when the filesystem encoding is
1361
not UTF-8. It may be better to implement an alternative so that we can
1362
safely handle paths that are not properly decodable in the current
1365
See DirReader.read_dir for details.
1367
_utf8_encode = self._utf8_encode
1369
_listdir = os.listdir
1370
_kind_from_mode = file_kind_from_stat_mode
1373
relprefix = prefix + '/'
1376
top_slash = top + u'/'
1379
append = dirblock.append
1380
for name in sorted(_listdir(top)):
1382
name_utf8 = _utf8_encode(name)[0]
1383
except UnicodeDecodeError:
1384
raise errors.BadFilenameEncoding(
1385
_utf8_encode(relprefix)[0] + name, _fs_enc)
1386
abspath = top_slash + name
1387
statvalue = _lstat(abspath)
1388
kind = _kind_from_mode(statvalue.st_mode)
1389
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1393
def copy_tree(from_path, to_path, handlers={}):
1394
"""Copy all of the entries in from_path into to_path.
1396
:param from_path: The base directory to copy.
1397
:param to_path: The target directory. If it does not exist, it will
1399
:param handlers: A dictionary of functions, which takes a source and
1400
destinations for files, directories, etc.
1401
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1402
'file', 'directory', and 'symlink' should always exist.
1403
If they are missing, they will be replaced with 'os.mkdir()',
1404
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1406
# Now, just copy the existing cached tree to the new location
1407
# We use a cheap trick here.
1408
# Absolute paths are prefixed with the first parameter
1409
# relative paths are prefixed with the second.
1410
# So we can get both the source and target returned
1411
# without any extra work.
1413
def copy_dir(source, dest):
1416
def copy_link(source, dest):
1417
"""Copy the contents of a symlink"""
1418
link_to = os.readlink(source)
1419
os.symlink(link_to, dest)
1421
real_handlers = {'file':shutil.copy2,
1422
'symlink':copy_link,
1423
'directory':copy_dir,
1425
real_handlers.update(handlers)
1427
if not os.path.exists(to_path):
1428
real_handlers['directory'](from_path, to_path)
1430
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1431
for relpath, name, kind, st, abspath in entries:
1432
real_handlers[kind](abspath, relpath)
1435
def path_prefix_key(path):
1436
"""Generate a prefix-order path key for path.
1438
This can be used to sort paths in the same way that walkdirs does.
1440
return (dirname(path) , path)
1443
def compare_paths_prefix_order(path_a, path_b):
1444
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1445
key_a = path_prefix_key(path_a)
1446
key_b = path_prefix_key(path_b)
1447
return cmp(key_a, key_b)
1450
_cached_user_encoding = None
1453
def get_user_encoding(use_cache=True):
1454
"""Find out what the preferred user encoding is.
1456
This is generally the encoding that is used for command line parameters
1457
and file contents. This may be different from the terminal encoding
1458
or the filesystem encoding.
1460
:param use_cache: Enable cache for detected encoding.
1461
(This parameter is turned on by default,
1462
and required only for selftesting)
1464
:return: A string defining the preferred user encoding
1466
global _cached_user_encoding
1467
if _cached_user_encoding is not None and use_cache:
1468
return _cached_user_encoding
1470
if sys.platform == 'darwin':
1471
# python locale.getpreferredencoding() always return
1472
# 'mac-roman' on darwin. That's a lie.
1473
sys.platform = 'posix'
1475
if os.environ.get('LANG', None) is None:
1476
# If LANG is not set, we end up with 'ascii', which is bad
1477
# ('mac-roman' is more than ascii), so we set a default which
1478
# will give us UTF-8 (which appears to work in all cases on
1479
# OSX). Users are still free to override LANG of course, as
1480
# long as it give us something meaningful. This work-around
1481
# *may* not be needed with python 3k and/or OSX 10.5, but will
1482
# work with them too -- vila 20080908
1483
os.environ['LANG'] = 'en_US.UTF-8'
1486
sys.platform = 'darwin'
1491
user_encoding = locale.getpreferredencoding()
1492
except locale.Error, e:
1493
sys.stderr.write('bzr: warning: %s\n'
1494
' Could not determine what text encoding to use.\n'
1495
' This error usually means your Python interpreter\n'
1496
' doesn\'t support the locale set by $LANG (%s)\n'
1497
" Continuing with ascii encoding.\n"
1498
% (e, os.environ.get('LANG')))
1499
user_encoding = 'ascii'
1501
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1502
# treat that as ASCII, and not support printing unicode characters to the
1505
# For python scripts run under vim, we get '', so also treat that as ASCII
1506
if user_encoding in (None, 'cp0', ''):
1507
user_encoding = 'ascii'
1511
codecs.lookup(user_encoding)
1513
sys.stderr.write('bzr: warning:'
1514
' unknown encoding %s.'
1515
' Continuing with ascii encoding.\n'
1518
user_encoding = 'ascii'
1521
_cached_user_encoding = user_encoding
1523
return user_encoding
1526
def get_host_name():
1527
"""Return the current unicode host name.
1529
This is meant to be used in place of socket.gethostname() because that
1530
behaves inconsistently on different platforms.
1532
if sys.platform == "win32":
1534
return win32utils.get_host_name()
1537
return socket.gethostname().decode(get_user_encoding())
1540
def recv_all(socket, bytes):
1541
"""Receive an exact number of bytes.
1543
Regular Socket.recv() may return less than the requested number of bytes,
1544
dependning on what's in the OS buffer. MSG_WAITALL is not available
1545
on all platforms, but this should work everywhere. This will return
1546
less than the requested amount if the remote end closes.
1548
This isn't optimized and is intended mostly for use in testing.
1551
while len(b) < bytes:
1552
new = socket.recv(bytes - len(b))
1559
def send_all(socket, bytes):
1560
"""Send all bytes on a socket.
1562
Regular socket.sendall() can give socket error 10053 on Windows. This
1563
implementation sends no more than 64k at a time, which avoids this problem.
1566
for pos in xrange(0, len(bytes), chunk_size):
1567
socket.sendall(bytes[pos:pos+chunk_size])
1570
def dereference_path(path):
1571
"""Determine the real path to a file.
1573
All parent elements are dereferenced. But the file itself is not
1575
:param path: The original path. May be absolute or relative.
1576
:return: the real path *to* the file
1578
parent, base = os.path.split(path)
1579
# The pathjoin for '.' is a workaround for Python bug #1213894.
1580
# (initial path components aren't dereferenced)
1581
return pathjoin(realpath(pathjoin('.', parent)), base)
1584
def supports_mapi():
1585
"""Return True if we can use MAPI to launch a mail client."""
1586
return sys.platform == "win32"
1589
def resource_string(package, resource_name):
1590
"""Load a resource from a package and return it as a string.
1592
Note: Only packages that start with bzrlib are currently supported.
1594
This is designed to be a lightweight implementation of resource
1595
loading in a way which is API compatible with the same API from
1597
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
1598
If and when pkg_resources becomes a standard library, this routine
1601
# Check package name is within bzrlib
1602
if package == "bzrlib":
1603
resource_relpath = resource_name
1604
elif package.startswith("bzrlib."):
1605
package = package[len("bzrlib."):].replace('.', os.sep)
1606
resource_relpath = pathjoin(package, resource_name)
1608
raise errors.BzrError('resource package %s not in bzrlib' % package)
1610
# Map the resource to a file and read its contents
1611
base = dirname(bzrlib.__file__)
1612
if getattr(sys, 'frozen', None): # bzr.exe
1613
base = abspath(pathjoin(base, '..', '..'))
1614
filename = pathjoin(base, resource_relpath)
1615
return open(filename, 'rU').read()
1618
def file_kind_from_stat_mode_thunk(mode):
1619
global file_kind_from_stat_mode
1620
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
1622
from bzrlib._readdir_pyx import UTF8DirReader
1623
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
1625
from bzrlib._readdir_py import (
1626
_kind_from_mode as file_kind_from_stat_mode
1628
return file_kind_from_stat_mode(mode)
1629
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1632
def file_kind(f, _lstat=os.lstat):
1634
return file_kind_from_stat_mode(_lstat(f).st_mode)
1636
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1637
raise errors.NoSuchFile(f)
1640
if sys.platform == "win32":
1643
return msvcrt.getch()
1648
fd = sys.stdin.fileno()
1649
settings = termios.tcgetattr(fd)
1652
ch = sys.stdin.read(1)
1654
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
added
removed
bzrlib/osutils.py
