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# Copyright (C) 2005-2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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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from bzrlib.symbol_versioning 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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# Cross platform wall-clock time functionality with decent resolution.
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# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
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# only has a resolution of ~15ms. Note that ``time.clock()`` is not
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# synchronized with ``time.time()``, this is only meant to be used to find
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# delta times by subtracting from another call to this function.
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timer_func = time.time
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if sys.platform == 'win32':
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timer_func = time.clock
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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_NOINHERIT and O_TEXT exists only on win32 too.
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O_BINARY = getattr(os, 'O_BINARY', 0)
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O_TEXT = getattr(os, 'O_TEXT', 0)
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O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
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def get_unicode_argv():
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user_encoding = get_user_encoding()
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return [a.decode(user_encoding) for a in sys.argv[1:]]
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except UnicodeDecodeError:
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raise errors.BzrError(("Parameter '%r' is unsupported by the current "
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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, drawn from the paths parameter.
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return path.split('/')
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sorted_paths = sorted(list(paths), key=sort_key)
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search_paths = [sorted_paths[0]]
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for path in sorted_paths[1:]:
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if not is_inside(search_paths[-1], path):
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# This path is unique, add it
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search_paths.append(path)
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return set(search_paths)
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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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# Slightly faster than using .get(, '') when the common case is that
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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
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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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# callers use different encodings for the paths so the following MUST
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# respect that. We rely on python upcasting to unicode if new is unicode
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# and keeping a str if not.
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tmp_name = 'tmp.%s.%.9f.%d.%s' % (base, time.time(),
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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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failure_exc = sys.exc_info()
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if (file_existed and e.errno in (None, errno.ENOENT)
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and old.lower() == new.lower()):
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# source and target are the same file on a case-insensitive
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# filesystem, so we don't generate an exception
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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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if failure_exc is not None:
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raise failure_exc[0], failure_exc[1], failure_exc[2]
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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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f = win32utils.get_unicode_argv # special function or None
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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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report_activity=None, direction='read'):
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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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:param report_activity: Call this as bytes are read, see
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Transport._report_activity
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:param direction: Will be passed to report_activity
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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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if report_activity is not None:
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report_activity(len(block), direction)
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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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if report_activity is not None:
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report_activity(len(block), direction)
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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 size_sha_file(f):
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"""Calculate the size and hexdigest of an open file.
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The file cursor should be already at the start and
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the caller is responsible for closing the file afterwards.
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return size, s.hexdigest()
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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 | O_NOINHERIT)
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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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_default_format_by_weekday_num = [wd + " %Y-%m-%d %H:%M:%S" for wd in weekdays]
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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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# Cache of formatted offset strings
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def format_date_with_offset_in_original_timezone(t, offset=0,
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_cache=_offset_cache):
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"""Return a formatted date string in the original timezone.
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This routine may be faster then format_date.
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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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tt = time.gmtime(t + offset)
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date_fmt = _default_format_by_weekday_num[tt[6]]
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date_str = time.strftime(date_fmt, tt)
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offset_str = _cache.get(offset, None)
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if offset_str is None:
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offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
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_cache[offset] = offset_str
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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(get_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):
903
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)
919
raise errors.BzrError("sorry, %r not allowed in path" % f)
920
elif (f == '.') or (f == ''):
929
if (f == '..') or (f is None) or (f == ''):
930
raise errors.BzrError("sorry, %r not allowed in path" % f)
934
def parent_directories(filename):
935
"""Return the list of parent directories, deepest first.
937
For example, parent_directories("a/b/c") -> ["a/b", "a"].
940
parts = splitpath(dirname(filename))
942
parents.append(joinpath(parts))
947
_extension_load_failures = []
950
def failed_to_load_extension(exception):
951
"""Handle failing to load a binary extension.
953
This should be called from the ImportError block guarding the attempt to
954
import the native extension. If this function returns, the pure-Python
955
implementation should be loaded instead::
958
>>> import bzrlib._fictional_extension_pyx
959
>>> except ImportError, e:
960
>>> bzrlib.osutils.failed_to_load_extension(e)
961
>>> import bzrlib._fictional_extension_py
963
# NB: This docstring is just an example, not a doctest, because doctest
964
# currently can't cope with the use of lazy imports in this namespace --
967
# This currently doesn't report the failure at the time it occurs, because
968
# they tend to happen very early in startup when we can't check config
969
# files etc, and also we want to report all failures but not spam the user
971
from bzrlib import trace
972
exception_str = str(exception)
973
if exception_str not in _extension_load_failures:
974
trace.mutter("failed to load compiled extension: %s" % exception_str)
975
_extension_load_failures.append(exception_str)
978
def report_extension_load_failures():
979
if not _extension_load_failures:
981
from bzrlib.config import GlobalConfig
982
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
984
# the warnings framework should by default show this only once
985
from bzrlib.trace import warning
987
"bzr: warning: some compiled extensions could not be loaded; "
988
"see <https://answers.launchpad.net/bzr/+faq/703>")
989
# we no longer show the specific missing extensions here, because it makes
990
# the message too long and scary - see
991
# https://bugs.launchpad.net/bzr/+bug/430529
995
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
996
except ImportError, e:
997
failed_to_load_extension(e)
998
from bzrlib._chunks_to_lines_py import chunks_to_lines
1002
"""Split s into lines, but without removing the newline characters."""
1003
# Trivially convert a fulltext into a 'chunked' representation, and let
1004
# chunks_to_lines do the heavy lifting.
1005
if isinstance(s, str):
1006
# chunks_to_lines only supports 8-bit strings
1007
return chunks_to_lines([s])
1009
return _split_lines(s)
1012
def _split_lines(s):
1013
"""Split s into lines, but without removing the newline characters.
1015
This supports Unicode or plain string objects.
1017
lines = s.split('\n')
1018
result = [line + '\n' for line in lines[:-1]]
1020
result.append(lines[-1])
1024
def hardlinks_good():
1025
return sys.platform not in ('win32', 'cygwin', 'darwin')
1028
def link_or_copy(src, dest):
1029
"""Hardlink a file, or copy it if it can't be hardlinked."""
1030
if not hardlinks_good():
1031
shutil.copyfile(src, dest)
1035
except (OSError, IOError), e:
1036
if e.errno != errno.EXDEV:
1038
shutil.copyfile(src, dest)
1041
def delete_any(path):
1042
"""Delete a file, symlink or directory.
1044
Will delete even if readonly.
1047
_delete_file_or_dir(path)
1048
except (OSError, IOError), e:
1049
if e.errno in (errno.EPERM, errno.EACCES):
1050
# make writable and try again
1053
except (OSError, IOError):
1055
_delete_file_or_dir(path)
1060
def _delete_file_or_dir(path):
1061
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
1062
# Forgiveness than Permission (EAFP) because:
1063
# - root can damage a solaris file system by using unlink,
1064
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
1065
# EACCES, OSX: EPERM) when invoked on a directory.
1066
if isdir(path): # Takes care of symlinks
1073
if getattr(os, 'symlink', None) is not None:
1079
def has_hardlinks():
1080
if getattr(os, 'link', None) is not None:
1086
def host_os_dereferences_symlinks():
1087
return (has_symlinks()
1088
and sys.platform not in ('cygwin', 'win32'))
1091
def readlink(abspath):
1092
"""Return a string representing the path to which the symbolic link points.
1094
:param abspath: The link absolute unicode path.
1096
This his guaranteed to return the symbolic link in unicode in all python
1099
link = abspath.encode(_fs_enc)
1100
target = os.readlink(link)
1101
target = target.decode(_fs_enc)
1105
def contains_whitespace(s):
1106
"""True if there are any whitespace characters in s."""
1107
# string.whitespace can include '\xa0' in certain locales, because it is
1108
# considered "non-breaking-space" as part of ISO-8859-1. But it
1109
# 1) Isn't a breaking whitespace
1110
# 2) Isn't one of ' \t\r\n' which are characters we sometimes use as
1112
# 3) '\xa0' isn't unicode safe since it is >128.
1114
# This should *not* be a unicode set of characters in case the source
1115
# string is not a Unicode string. We can auto-up-cast the characters since
1116
# they are ascii, but we don't want to auto-up-cast the string in case it
1118
for ch in ' \t\n\r\v\f':
1125
def contains_linebreaks(s):
1126
"""True if there is any vertical whitespace in s."""
1134
def relpath(base, path):
1135
"""Return path relative to base, or raise exception.
1137
The path may be either an absolute path or a path relative to the
1138
current working directory.
1140
os.path.commonprefix (python2.4) has a bad bug that it works just
1141
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
1142
avoids that problem.
1145
if len(base) < MIN_ABS_PATHLENGTH:
1146
# must have space for e.g. a drive letter
1147
raise ValueError('%r is too short to calculate a relative path'
1155
if len(head) <= len(base) and head != base:
1156
raise errors.PathNotChild(rp, base)
1159
head, tail = split(head)
1164
return pathjoin(*reversed(s))
1169
def _cicp_canonical_relpath(base, path):
1170
"""Return the canonical path relative to base.
1172
Like relpath, but on case-insensitive-case-preserving file-systems, this
1173
will return the relpath as stored on the file-system rather than in the
1174
case specified in the input string, for all existing portions of the path.
1176
This will cause O(N) behaviour if called for every path in a tree; if you
1177
have a number of paths to convert, you should use canonical_relpaths().
1179
# TODO: it should be possible to optimize this for Windows by using the
1180
# win32 API FindFiles function to look for the specified name - but using
1181
# os.listdir() still gives us the correct, platform agnostic semantics in
1184
rel = relpath(base, path)
1185
# '.' will have been turned into ''
1189
abs_base = abspath(base)
1191
_listdir = os.listdir
1193
# use an explicit iterator so we can easily consume the rest on early exit.
1194
bit_iter = iter(rel.split('/'))
1195
for bit in bit_iter:
1198
next_entries = _listdir(current)
1199
except OSError: # enoent, eperm, etc
1200
# We can't find this in the filesystem, so just append the
1202
current = pathjoin(current, bit, *list(bit_iter))
1204
for look in next_entries:
1205
if lbit == look.lower():
1206
current = pathjoin(current, look)
1209
# got to the end, nothing matched, so we just return the
1210
# non-existing bits as they were specified (the filename may be
1211
# the target of a move, for example).
1212
current = pathjoin(current, bit, *list(bit_iter))
1214
return current[len(abs_base):].lstrip('/')
1216
# XXX - TODO - we need better detection/integration of case-insensitive
1217
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1218
# filesystems), for example, so could probably benefit from the same basic
1219
# support there. For now though, only Windows and OSX get that support, and
1220
# they get it for *all* file-systems!
1221
if sys.platform in ('win32', 'darwin'):
1222
canonical_relpath = _cicp_canonical_relpath
1224
canonical_relpath = relpath
1226
def canonical_relpaths(base, paths):
1227
"""Create an iterable to canonicalize a sequence of relative paths.
1229
The intent is for this implementation to use a cache, vastly speeding
1230
up multiple transformations in the same directory.
1232
# but for now, we haven't optimized...
1233
return [canonical_relpath(base, p) for p in paths]
1235
def safe_unicode(unicode_or_utf8_string):
1236
"""Coerce unicode_or_utf8_string into unicode.
1238
If it is unicode, it is returned.
1239
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1240
wrapped in a BzrBadParameterNotUnicode exception.
1242
if isinstance(unicode_or_utf8_string, unicode):
1243
return unicode_or_utf8_string
1245
return unicode_or_utf8_string.decode('utf8')
1246
except UnicodeDecodeError:
1247
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1250
def safe_utf8(unicode_or_utf8_string):
1251
"""Coerce unicode_or_utf8_string to a utf8 string.
1253
If it is a str, it is returned.
1254
If it is Unicode, it is encoded into a utf-8 string.
1256
if isinstance(unicode_or_utf8_string, str):
1257
# TODO: jam 20070209 This is overkill, and probably has an impact on
1258
# performance if we are dealing with lots of apis that want a
1261
# Make sure it is a valid utf-8 string
1262
unicode_or_utf8_string.decode('utf-8')
1263
except UnicodeDecodeError:
1264
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1265
return unicode_or_utf8_string
1266
return unicode_or_utf8_string.encode('utf-8')
1269
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1270
' Revision id generators should be creating utf8'
1274
def safe_revision_id(unicode_or_utf8_string, warn=True):
1275
"""Revision ids should now be utf8, but at one point they were unicode.
1277
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1279
:param warn: Functions that are sanitizing user data can set warn=False
1280
:return: None or a utf8 revision id.
1282
if (unicode_or_utf8_string is None
1283
or unicode_or_utf8_string.__class__ == str):
1284
return unicode_or_utf8_string
1286
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1288
return cache_utf8.encode(unicode_or_utf8_string)
1291
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1292
' generators should be creating utf8 file ids.')
1295
def safe_file_id(unicode_or_utf8_string, warn=True):
1296
"""File ids should now be utf8, but at one point they were unicode.
1298
This is the same as safe_utf8, except it uses the cached encode functions
1299
to save a little bit of performance.
1301
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1303
:param warn: Functions that are sanitizing user data can set warn=False
1304
:return: None or a utf8 file id.
1306
if (unicode_or_utf8_string is None
1307
or unicode_or_utf8_string.__class__ == str):
1308
return unicode_or_utf8_string
1310
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1312
return cache_utf8.encode(unicode_or_utf8_string)
1315
_platform_normalizes_filenames = False
1316
if sys.platform == 'darwin':
1317
_platform_normalizes_filenames = True
1320
def normalizes_filenames():
1321
"""Return True if this platform normalizes unicode filenames.
1323
Mac OSX does, Windows/Linux do not.
1325
return _platform_normalizes_filenames
1328
def _accessible_normalized_filename(path):
1329
"""Get the unicode normalized path, and if you can access the file.
1331
On platforms where the system normalizes filenames (Mac OSX),
1332
you can access a file by any path which will normalize correctly.
1333
On platforms where the system does not normalize filenames
1334
(Windows, Linux), you have to access a file by its exact path.
1336
Internally, bzr only supports NFC normalization, since that is
1337
the standard for XML documents.
1339
So return the normalized path, and a flag indicating if the file
1340
can be accessed by that path.
1343
return unicodedata.normalize('NFC', unicode(path)), True
1346
def _inaccessible_normalized_filename(path):
1347
__doc__ = _accessible_normalized_filename.__doc__
1349
normalized = unicodedata.normalize('NFC', unicode(path))
1350
return normalized, normalized == path
1353
if _platform_normalizes_filenames:
1354
normalized_filename = _accessible_normalized_filename
1356
normalized_filename = _inaccessible_normalized_filename
1359
def set_signal_handler(signum, handler, restart_syscall=True):
1360
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1361
on platforms that support that.
1363
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1364
automatically restart (by calling `signal.siginterrupt(signum,
1365
False)`). May be ignored if the feature is not available on this
1366
platform or Python version.
1368
old_handler = signal.signal(signum, handler)
1371
siginterrupt = signal.siginterrupt
1372
except AttributeError: # siginterrupt doesn't exist on this platform, or for this version of
1376
siginterrupt(signum, False)
1380
default_terminal_width = 80
1381
"""The default terminal width for ttys.
1383
This is defined so that higher levels can share a common fallback value when
1384
terminal_width() returns None.
1388
def terminal_width():
1389
"""Return terminal width.
1391
None is returned if the width can't established precisely.
1394
- if BZR_COLUMNS is set, returns its value
1395
- if there is no controlling terminal, returns None
1396
- if COLUMNS is set, returns its value,
1398
From there, we need to query the OS to get the size of the controlling
1402
- get termios.TIOCGWINSZ
1403
- if an error occurs or a negative value is obtained, returns None
1407
- win32utils.get_console_size() decides,
1408
- returns None on error (provided default value)
1411
# If BZR_COLUMNS is set, take it, user is always right
1413
return int(os.environ['BZR_COLUMNS'])
1414
except (KeyError, ValueError):
1417
isatty = getattr(sys.stdout, 'isatty', None)
1418
if isatty is None or not isatty():
1419
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1422
# If COLUMNS is set, take it, the terminal knows better (even inside a
1423
# given terminal, the application can decide to set COLUMNS to a lower
1424
# value (splitted screen) or a bigger value (scroll bars))
1426
return int(os.environ['COLUMNS'])
1427
except (KeyError, ValueError):
1430
width, height = _terminal_size(None, None)
1432
# Consider invalid values as meaning no width
1438
def _win32_terminal_size(width, height):
1439
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1440
return width, height
1443
def _ioctl_terminal_size(width, height):
1445
import struct, fcntl, termios
1446
s = struct.pack('HHHH', 0, 0, 0, 0)
1447
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1448
height, width = struct.unpack('HHHH', x)[0:2]
1449
except (IOError, AttributeError):
1451
return width, height
1453
_terminal_size = None
1454
"""Returns the terminal size as (width, height).
1456
:param width: Default value for width.
1457
:param height: Default value for height.
1459
This is defined specifically for each OS and query the size of the controlling
1460
terminal. If any error occurs, the provided default values should be returned.
1462
if sys.platform == 'win32':
1463
_terminal_size = _win32_terminal_size
1465
_terminal_size = _ioctl_terminal_size
1468
def _terminal_size_changed(signum, frame):
1469
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1470
width, height = _terminal_size(None, None)
1471
if width is not None:
1472
os.environ['COLUMNS'] = str(width)
1475
_registered_sigwinch = False
1477
def watch_sigwinch():
1478
"""Register for SIGWINCH, once and only once."""
1479
global _registered_sigwinch
1480
if not _registered_sigwinch:
1481
if sys.platform == 'win32':
1482
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1483
# ReadConsoleInput but I've no idea how to plug that in
1484
# the current design -- vila 20091216
1487
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1488
_registered_sigwinch = True
1491
def supports_executable():
1492
return sys.platform != "win32"
1495
def supports_posix_readonly():
1496
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1498
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1499
directory controls creation/deletion, etc.
1501
And under win32, readonly means that the directory itself cannot be
1502
deleted. The contents of a readonly directory can be changed, unlike POSIX
1503
where files in readonly directories cannot be added, deleted or renamed.
1505
return sys.platform != "win32"
1508
def set_or_unset_env(env_variable, value):
1509
"""Modify the environment, setting or removing the env_variable.
1511
:param env_variable: The environment variable in question
1512
:param value: The value to set the environment to. If None, then
1513
the variable will be removed.
1514
:return: The original value of the environment variable.
1516
orig_val = os.environ.get(env_variable)
1518
if orig_val is not None:
1519
del os.environ[env_variable]
1521
if isinstance(value, unicode):
1522
value = value.encode(get_user_encoding())
1523
os.environ[env_variable] = value
1527
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1530
def check_legal_path(path):
1531
"""Check whether the supplied path is legal.
1532
This is only required on Windows, so we don't test on other platforms
1535
if sys.platform != "win32":
1537
if _validWin32PathRE.match(path) is None:
1538
raise errors.IllegalPath(path)
1541
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1543
def _is_error_enotdir(e):
1544
"""Check if this exception represents ENOTDIR.
1546
Unfortunately, python is very inconsistent about the exception
1547
here. The cases are:
1548
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1549
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1550
which is the windows error code.
1551
3) Windows, Python2.5 uses errno == EINVAL and
1552
winerror == ERROR_DIRECTORY
1554
:param e: An Exception object (expected to be OSError with an errno
1555
attribute, but we should be able to cope with anything)
1556
:return: True if this represents an ENOTDIR error. False otherwise.
1558
en = getattr(e, 'errno', None)
1559
if (en == errno.ENOTDIR
1560
or (sys.platform == 'win32'
1561
and (en == _WIN32_ERROR_DIRECTORY
1562
or (en == errno.EINVAL
1563
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1569
def walkdirs(top, prefix=""):
1570
"""Yield data about all the directories in a tree.
1572
This yields all the data about the contents of a directory at a time.
1573
After each directory has been yielded, if the caller has mutated the list
1574
to exclude some directories, they are then not descended into.
1576
The data yielded is of the form:
1577
((directory-relpath, directory-path-from-top),
1578
[(relpath, basename, kind, lstat, path-from-top), ...]),
1579
- directory-relpath is the relative path of the directory being returned
1580
with respect to top. prefix is prepended to this.
1581
- directory-path-from-root is the path including top for this directory.
1582
It is suitable for use with os functions.
1583
- relpath is the relative path within the subtree being walked.
1584
- basename is the basename of the path
1585
- kind is the kind of the file now. If unknown then the file is not
1586
present within the tree - but it may be recorded as versioned. See
1588
- lstat is the stat data *if* the file was statted.
1589
- planned, not implemented:
1590
path_from_tree_root is the path from the root of the tree.
1592
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1593
allows one to walk a subtree but get paths that are relative to a tree
1595
:return: an iterator over the dirs.
1597
#TODO there is a bit of a smell where the results of the directory-
1598
# summary in this, and the path from the root, may not agree
1599
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1600
# potentially confusing output. We should make this more robust - but
1601
# not at a speed cost. RBC 20060731
1603
_directory = _directory_kind
1604
_listdir = os.listdir
1605
_kind_from_mode = file_kind_from_stat_mode
1606
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1608
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1609
relroot, _, _, _, top = pending.pop()
1611
relprefix = relroot + u'/'
1614
top_slash = top + u'/'
1617
append = dirblock.append
1619
names = sorted(_listdir(top))
1621
if not _is_error_enotdir(e):
1625
abspath = top_slash + name
1626
statvalue = _lstat(abspath)
1627
kind = _kind_from_mode(statvalue.st_mode)
1628
append((relprefix + name, name, kind, statvalue, abspath))
1629
yield (relroot, top), dirblock
1631
# push the user specified dirs from dirblock
1632
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1635
class DirReader(object):
1636
"""An interface for reading directories."""
1638
def top_prefix_to_starting_dir(self, top, prefix=""):
1639
"""Converts top and prefix to a starting dir entry
1641
:param top: A utf8 path
1642
:param prefix: An optional utf8 path to prefix output relative paths
1644
:return: A tuple starting with prefix, and ending with the native
1647
raise NotImplementedError(self.top_prefix_to_starting_dir)
1649
def read_dir(self, prefix, top):
1650
"""Read a specific dir.
1652
:param prefix: A utf8 prefix to be preprended to the path basenames.
1653
:param top: A natively encoded path to read.
1654
:return: A list of the directories contents. Each item contains:
1655
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1657
raise NotImplementedError(self.read_dir)
1660
_selected_dir_reader = None
1663
def _walkdirs_utf8(top, prefix=""):
1664
"""Yield data about all the directories in a tree.
1666
This yields the same information as walkdirs() only each entry is yielded
1667
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1668
are returned as exact byte-strings.
1670
:return: yields a tuple of (dir_info, [file_info])
1671
dir_info is (utf8_relpath, path-from-top)
1672
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1673
if top is an absolute path, path-from-top is also an absolute path.
1674
path-from-top might be unicode or utf8, but it is the correct path to
1675
pass to os functions to affect the file in question. (such as os.lstat)
1677
global _selected_dir_reader
1678
if _selected_dir_reader is None:
1679
fs_encoding = _fs_enc.upper()
1680
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1681
# Win98 doesn't have unicode apis like FindFirstFileW
1682
# TODO: We possibly could support Win98 by falling back to the
1683
# original FindFirstFile, and using TCHAR instead of WCHAR,
1684
# but that gets a bit tricky, and requires custom compiling
1687
from bzrlib._walkdirs_win32 import Win32ReadDir
1688
_selected_dir_reader = Win32ReadDir()
1691
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1692
# ANSI_X3.4-1968 is a form of ASCII
1694
from bzrlib._readdir_pyx import UTF8DirReader
1695
_selected_dir_reader = UTF8DirReader()
1696
except ImportError, e:
1697
failed_to_load_extension(e)
1700
if _selected_dir_reader is None:
1701
# Fallback to the python version
1702
_selected_dir_reader = UnicodeDirReader()
1704
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1705
# But we don't actually uses 1-3 in pending, so set them to None
1706
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1707
read_dir = _selected_dir_reader.read_dir
1708
_directory = _directory_kind
1710
relroot, _, _, _, top = pending[-1].pop()
1713
dirblock = sorted(read_dir(relroot, top))
1714
yield (relroot, top), dirblock
1715
# push the user specified dirs from dirblock
1716
next = [d for d in reversed(dirblock) if d[2] == _directory]
1718
pending.append(next)
1721
class UnicodeDirReader(DirReader):
1722
"""A dir reader for non-utf8 file systems, which transcodes."""
1724
__slots__ = ['_utf8_encode']
1727
self._utf8_encode = codecs.getencoder('utf8')
1729
def top_prefix_to_starting_dir(self, top, prefix=""):
1730
"""See DirReader.top_prefix_to_starting_dir."""
1731
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1733
def read_dir(self, prefix, top):
1734
"""Read a single directory from a non-utf8 file system.
1736
top, and the abspath element in the output are unicode, all other paths
1737
are utf8. Local disk IO is done via unicode calls to listdir etc.
1739
This is currently the fallback code path when the filesystem encoding is
1740
not UTF-8. It may be better to implement an alternative so that we can
1741
safely handle paths that are not properly decodable in the current
1744
See DirReader.read_dir for details.
1746
_utf8_encode = self._utf8_encode
1748
_listdir = os.listdir
1749
_kind_from_mode = file_kind_from_stat_mode
1752
relprefix = prefix + '/'
1755
top_slash = top + u'/'
1758
append = dirblock.append
1759
for name in sorted(_listdir(top)):
1761
name_utf8 = _utf8_encode(name)[0]
1762
except UnicodeDecodeError:
1763
raise errors.BadFilenameEncoding(
1764
_utf8_encode(relprefix)[0] + name, _fs_enc)
1765
abspath = top_slash + name
1766
statvalue = _lstat(abspath)
1767
kind = _kind_from_mode(statvalue.st_mode)
1768
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1772
def copy_tree(from_path, to_path, handlers={}):
1773
"""Copy all of the entries in from_path into to_path.
1775
:param from_path: The base directory to copy.
1776
:param to_path: The target directory. If it does not exist, it will
1778
:param handlers: A dictionary of functions, which takes a source and
1779
destinations for files, directories, etc.
1780
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1781
'file', 'directory', and 'symlink' should always exist.
1782
If they are missing, they will be replaced with 'os.mkdir()',
1783
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1785
# Now, just copy the existing cached tree to the new location
1786
# We use a cheap trick here.
1787
# Absolute paths are prefixed with the first parameter
1788
# relative paths are prefixed with the second.
1789
# So we can get both the source and target returned
1790
# without any extra work.
1792
def copy_dir(source, dest):
1795
def copy_link(source, dest):
1796
"""Copy the contents of a symlink"""
1797
link_to = os.readlink(source)
1798
os.symlink(link_to, dest)
1800
real_handlers = {'file':shutil.copy2,
1801
'symlink':copy_link,
1802
'directory':copy_dir,
1804
real_handlers.update(handlers)
1806
if not os.path.exists(to_path):
1807
real_handlers['directory'](from_path, to_path)
1809
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1810
for relpath, name, kind, st, abspath in entries:
1811
real_handlers[kind](abspath, relpath)
1814
def copy_ownership(dst, src=None):
1815
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1817
If src is None, the containing directory is used as source. If chown
1818
fails, the error is ignored and a warning is printed.
1820
chown = getattr(os, 'chown', None)
1825
src = os.path.dirname(dst)
1831
chown(dst, s.st_uid, s.st_gid)
1833
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1836
def mkdir_with_ownership(path, ownership_src=None):
1837
"""Create the directory 'path' with specified ownership.
1839
If ownership_src is given, copies (chown) usr/grp ownership
1840
from 'ownership_src' to 'path'. If ownership_src is None, use the
1841
containing dir ownership.
1844
copy_ownership(path, ownership_src)
1847
def open_with_ownership(filename, mode='r', bufsize=-1, ownership_src=None):
1848
"""Open the file 'filename' with the specified ownership.
1850
If ownership_src is specified, copy usr/grp ownership from ownership_src
1851
to filename. If ownership_src is None, copy ownership from containing
1853
Returns the opened file object.
1855
f = open(filename, mode, bufsize)
1856
copy_ownership(filename, ownership_src)
1860
def path_prefix_key(path):
1861
"""Generate a prefix-order path key for path.
1863
This can be used to sort paths in the same way that walkdirs does.
1865
return (dirname(path) , path)
1868
def compare_paths_prefix_order(path_a, path_b):
1869
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1870
key_a = path_prefix_key(path_a)
1871
key_b = path_prefix_key(path_b)
1872
return cmp(key_a, key_b)
1875
_cached_user_encoding = None
1878
def get_user_encoding(use_cache=True):
1879
"""Find out what the preferred user encoding is.
1881
This is generally the encoding that is used for command line parameters
1882
and file contents. This may be different from the terminal encoding
1883
or the filesystem encoding.
1885
:param use_cache: Enable cache for detected encoding.
1886
(This parameter is turned on by default,
1887
and required only for selftesting)
1889
:return: A string defining the preferred user encoding
1891
global _cached_user_encoding
1892
if _cached_user_encoding is not None and use_cache:
1893
return _cached_user_encoding
1895
if sys.platform == 'darwin':
1896
# python locale.getpreferredencoding() always return
1897
# 'mac-roman' on darwin. That's a lie.
1898
sys.platform = 'posix'
1900
if os.environ.get('LANG', None) is None:
1901
# If LANG is not set, we end up with 'ascii', which is bad
1902
# ('mac-roman' is more than ascii), so we set a default which
1903
# will give us UTF-8 (which appears to work in all cases on
1904
# OSX). Users are still free to override LANG of course, as
1905
# long as it give us something meaningful. This work-around
1906
# *may* not be needed with python 3k and/or OSX 10.5, but will
1907
# work with them too -- vila 20080908
1908
os.environ['LANG'] = 'en_US.UTF-8'
1911
sys.platform = 'darwin'
1916
user_encoding = locale.getpreferredencoding()
1917
except locale.Error, e:
1918
sys.stderr.write('bzr: warning: %s\n'
1919
' Could not determine what text encoding to use.\n'
1920
' This error usually means your Python interpreter\n'
1921
' doesn\'t support the locale set by $LANG (%s)\n'
1922
" Continuing with ascii encoding.\n"
1923
% (e, os.environ.get('LANG')))
1924
user_encoding = 'ascii'
1926
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1927
# treat that as ASCII, and not support printing unicode characters to the
1930
# For python scripts run under vim, we get '', so also treat that as ASCII
1931
if user_encoding in (None, 'cp0', ''):
1932
user_encoding = 'ascii'
1936
codecs.lookup(user_encoding)
1938
sys.stderr.write('bzr: warning:'
1939
' unknown encoding %s.'
1940
' Continuing with ascii encoding.\n'
1943
user_encoding = 'ascii'
1946
_cached_user_encoding = user_encoding
1948
return user_encoding
1951
def get_host_name():
1952
"""Return the current unicode host name.
1954
This is meant to be used in place of socket.gethostname() because that
1955
behaves inconsistently on different platforms.
1957
if sys.platform == "win32":
1959
return win32utils.get_host_name()
1962
return socket.gethostname().decode(get_user_encoding())
1965
# We must not read/write any more than 64k at a time from/to a socket so we
1966
# don't risk "no buffer space available" errors on some platforms. Windows in
1967
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1969
MAX_SOCKET_CHUNK = 64 * 1024
1971
def read_bytes_from_socket(sock, report_activity=None,
1972
max_read_size=MAX_SOCKET_CHUNK):
1973
"""Read up to max_read_size of bytes from sock and notify of progress.
1975
Translates "Connection reset by peer" into file-like EOF (return an
1976
empty string rather than raise an error), and repeats the recv if
1977
interrupted by a signal.
1981
bytes = sock.recv(max_read_size)
1982
except socket.error, e:
1984
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1985
# The connection was closed by the other side. Callers expect
1986
# an empty string to signal end-of-stream.
1988
elif eno == errno.EINTR:
1989
# Retry the interrupted recv.
1993
if report_activity is not None:
1994
report_activity(len(bytes), 'read')
1998
def recv_all(socket, count):
1999
"""Receive an exact number of bytes.
2001
Regular Socket.recv() may return less than the requested number of bytes,
2002
depending on what's in the OS buffer. MSG_WAITALL is not available
2003
on all platforms, but this should work everywhere. This will return
2004
less than the requested amount if the remote end closes.
2006
This isn't optimized and is intended mostly for use in testing.
2009
while len(b) < count:
2010
new = read_bytes_from_socket(socket, None, count - len(b))
2017
def send_all(sock, bytes, report_activity=None):
2018
"""Send all bytes on a socket.
2020
Breaks large blocks in smaller chunks to avoid buffering limitations on
2021
some platforms, and catches EINTR which may be thrown if the send is
2022
interrupted by a signal.
2024
This is preferred to socket.sendall(), because it avoids portability bugs
2025
and provides activity reporting.
2027
:param report_activity: Call this as bytes are read, see
2028
Transport._report_activity
2031
byte_count = len(bytes)
2032
while sent_total < byte_count:
2034
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2035
except socket.error, e:
2036
if e.args[0] != errno.EINTR:
2040
report_activity(sent, 'write')
2043
def dereference_path(path):
2044
"""Determine the real path to a file.
2046
All parent elements are dereferenced. But the file itself is not
2048
:param path: The original path. May be absolute or relative.
2049
:return: the real path *to* the file
2051
parent, base = os.path.split(path)
2052
# The pathjoin for '.' is a workaround for Python bug #1213894.
2053
# (initial path components aren't dereferenced)
2054
return pathjoin(realpath(pathjoin('.', parent)), base)
2057
def supports_mapi():
2058
"""Return True if we can use MAPI to launch a mail client."""
2059
return sys.platform == "win32"
2062
def resource_string(package, resource_name):
2063
"""Load a resource from a package and return it as a string.
2065
Note: Only packages that start with bzrlib are currently supported.
2067
This is designed to be a lightweight implementation of resource
2068
loading in a way which is API compatible with the same API from
2070
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2071
If and when pkg_resources becomes a standard library, this routine
2074
# Check package name is within bzrlib
2075
if package == "bzrlib":
2076
resource_relpath = resource_name
2077
elif package.startswith("bzrlib."):
2078
package = package[len("bzrlib."):].replace('.', os.sep)
2079
resource_relpath = pathjoin(package, resource_name)
2081
raise errors.BzrError('resource package %s not in bzrlib' % package)
2083
# Map the resource to a file and read its contents
2084
base = dirname(bzrlib.__file__)
2085
if getattr(sys, 'frozen', None): # bzr.exe
2086
base = abspath(pathjoin(base, '..', '..'))
2087
filename = pathjoin(base, resource_relpath)
2088
return open(filename, 'rU').read()
2091
def file_kind_from_stat_mode_thunk(mode):
2092
global file_kind_from_stat_mode
2093
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2095
from bzrlib._readdir_pyx import UTF8DirReader
2096
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2097
except ImportError, e:
2098
# This is one time where we won't warn that an extension failed to
2099
# load. The extension is never available on Windows anyway.
2100
from bzrlib._readdir_py import (
2101
_kind_from_mode as file_kind_from_stat_mode
2103
return file_kind_from_stat_mode(mode)
2104
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2107
def file_kind(f, _lstat=os.lstat):
2109
return file_kind_from_stat_mode(_lstat(f).st_mode)
2111
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2112
raise errors.NoSuchFile(f)
2116
def until_no_eintr(f, *a, **kw):
2117
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2119
WARNING: you must be certain that it is safe to retry the call repeatedly
2120
if EINTR does occur. This is typically only true for low-level operations
2121
like os.read. If in any doubt, don't use this.
2123
Keep in mind that this is not a complete solution to EINTR. There is
2124
probably code in the Python standard library and other dependencies that
2125
may encounter EINTR if a signal arrives (and there is signal handler for
2126
that signal). So this function can reduce the impact for IO that bzrlib
2127
directly controls, but it is not a complete solution.
2129
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2133
except (IOError, OSError), e:
2134
if e.errno == errno.EINTR:
2139
def re_compile_checked(re_string, flags=0, where=""):
2140
"""Return a compiled re, or raise a sensible error.
2142
This should only be used when compiling user-supplied REs.
2144
:param re_string: Text form of regular expression.
2145
:param flags: eg re.IGNORECASE
2146
:param where: Message explaining to the user the context where
2147
it occurred, eg 'log search filter'.
2149
# from https://bugs.launchpad.net/bzr/+bug/251352
2151
re_obj = re.compile(re_string, flags)
2156
where = ' in ' + where
2157
# despite the name 'error' is a type
2158
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
2159
% (where, re_string, e))
2162
if sys.platform == "win32":
2165
return msvcrt.getch()
2170
fd = sys.stdin.fileno()
2171
settings = termios.tcgetattr(fd)
2174
ch = sys.stdin.read(1)
2176
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2180
if sys.platform == 'linux2':
2181
def _local_concurrency():
2183
prefix = 'processor'
2184
for line in file('/proc/cpuinfo', 'rb'):
2185
if line.startswith(prefix):
2186
concurrency = int(line[line.find(':')+1:]) + 1
2188
elif sys.platform == 'darwin':
2189
def _local_concurrency():
2190
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2191
stdout=subprocess.PIPE).communicate()[0]
2192
elif sys.platform[0:7] == 'freebsd':
2193
def _local_concurrency():
2194
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2195
stdout=subprocess.PIPE).communicate()[0]
2196
elif sys.platform == 'sunos5':
2197
def _local_concurrency():
2198
return subprocess.Popen(['psrinfo', '-p',],
2199
stdout=subprocess.PIPE).communicate()[0]
2200
elif sys.platform == "win32":
2201
def _local_concurrency():
2202
# This appears to return the number of cores.
2203
return os.environ.get('NUMBER_OF_PROCESSORS')
2205
def _local_concurrency():
2210
_cached_local_concurrency = None
2212
def local_concurrency(use_cache=True):
2213
"""Return how many processes can be run concurrently.
2215
Rely on platform specific implementations and default to 1 (one) if
2216
anything goes wrong.
2218
global _cached_local_concurrency
2220
if _cached_local_concurrency is not None and use_cache:
2221
return _cached_local_concurrency
2223
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2224
if concurrency is None:
2226
concurrency = _local_concurrency()
2227
except (OSError, IOError):
2230
concurrency = int(concurrency)
2231
except (TypeError, ValueError):
2234
_cached_concurrency = concurrency
2238
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2239
"""A stream writer that doesn't decode str arguments."""
2241
def __init__(self, encode, stream, errors='strict'):
2242
codecs.StreamWriter.__init__(self, stream, errors)
2243
self.encode = encode
2245
def write(self, object):
2246
if type(object) is str:
2247
self.stream.write(object)
2249
data, _ = self.encode(object, self.errors)
2250
self.stream.write(data)
2252
if sys.platform == 'win32':
2253
def open_file(filename, mode='r', bufsize=-1):
2254
"""This function is used to override the ``open`` builtin.
2256
But it uses O_NOINHERIT flag so the file handle is not inherited by
2257
child processes. Deleting or renaming a closed file opened with this
2258
function is not blocking child processes.
2260
writing = 'w' in mode
2261
appending = 'a' in mode
2262
updating = '+' in mode
2263
binary = 'b' in mode
2266
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2267
# for flags for each modes.
2277
flags |= os.O_WRONLY
2278
flags |= os.O_CREAT | os.O_TRUNC
2283
flags |= os.O_WRONLY
2284
flags |= os.O_CREAT | os.O_APPEND
2289
flags |= os.O_RDONLY
2291
return os.fdopen(os.open(filename, flags), mode, bufsize)
added
removed
bzrlib/osutils.py
