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# Copyright (C) 2005-2011 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 __future__ import absolute_import
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from brzlib.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 datetime import timedelta
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# We need to import both shutil and rmtree as we export the later on posix
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# and need the former on windows
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from shutil import rmtree
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# We need to import both tempfile and mkdtemp as we export the later on posix
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# and need the former on windows
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from tempfile import mkdtemp
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from brzlib.i18n import gettext
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from brzlib.symbol_versioning import (
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warn as warn_deprecated,
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from brzlib import symbol_versioning, _fs_enc
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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(gettext("Parameter {0!r} encoding is unsupported by {1} "
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"application locale.").format(a, user_encoding))
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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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chmod_if_possible(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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chmod_if_possible(filename, mod)
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def chmod_if_possible(filename, mode):
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# Set file mode if that can be safely done.
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# Sometimes even on unix the filesystem won't allow it - see
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# https://bugs.launchpad.net/bzr/+bug/606537
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# It is probably faster to just do the chmod, rather than
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# doing a stat, and then trying to compare
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os.chmod(filename, mode)
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except (IOError, OSError),e:
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# Permission/access denied seems to commonly happen on smbfs; there's
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# probably no point warning about it.
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# <https://bugs.launchpad.net/bzr/+bug/606537>
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if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
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trace.mutter("ignore error on chmod of %r: %r" % (
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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(gettext("lstat/stat of ({0!r}): {1!r}").format(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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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 _posix_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 _posix_normpath(path):
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path = posixpath.normpath(path)
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# Bug 861008: posixpath.normpath() returns a path normalized according to
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# the POSIX standard, which stipulates (for compatibility reasons) that two
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# leading slashes must not be simplified to one, and only if there are 3 or
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# more should they be simplified as one. So we treat the leading 2 slashes
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# as a special case here by simply removing the first slash, as we consider
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# that breaking POSIX compatibility for this obscure feature is acceptable.
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# This is not a paranoid precaution, as we notably get paths like this when
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# the repo is hosted at the root of the filesystem, i.e. in "/".
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if path.startswith('//'):
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def _posix_path_from_environ(key):
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"""Get unicode path from `key` in environment or None if not present
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Note that posix systems use arbitrary byte strings for filesystem objects,
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so a path that raises BadFilenameEncoding here may still be accessible.
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val = os.environ.get(key, None)
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return val.decode(_fs_enc)
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except UnicodeDecodeError:
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# GZ 2011-12-12:Ideally want to include `key` in the exception message
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raise errors.BadFilenameEncoding(val, _fs_enc)
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def _posix_get_home_dir():
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"""Get the home directory of the current user as a unicode path"""
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path = posixpath.expanduser("~")
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return path.decode(_fs_enc)
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except UnicodeDecodeError:
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raise errors.BadFilenameEncoding(path, _fs_enc)
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def _posix_getuser_unicode():
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"""Get username from environment or password database as unicode"""
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name = getpass.getuser()
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user_encoding = get_user_encoding()
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return name.decode(user_encoding)
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except UnicodeDecodeError:
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raise errors.BzrError("Encoding of username %r is unsupported by %s "
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"application locale." % (name, user_encoding))
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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 = ntpath.splitdrive(path)
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return drive.upper() + path
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def _win32_abspath(path):
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# Real ntpath.abspath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(ntpath.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 = ntpath.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 = ntpath.splitdrive(cwd)[0]
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path = cwd + '\\' + path
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return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
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def _win32_realpath(path):
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# Real ntpath.realpath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
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def _win32_pathjoin(*args):
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return ntpath.join(*args).replace('\\', '/')
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def _win32_normpath(path):
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return _win32_fixdrive(ntpath.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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def _rename_wrap_exception(rename_func):
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"""Adds extra information to any exceptions that come from rename().
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The exception has an updated message and 'old_filename' and 'new_filename'
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def _rename_wrapper(old, new):
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rename_func(old, new)
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detailed_error = OSError(e.errno, e.strerror +
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" [occurred when renaming '%s' to '%s']" %
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detailed_error.old_filename = old
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detailed_error.new_filename = new
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return _rename_wrapper
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# Default rename wraps os.rename()
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rename = _rename_wrap_exception(os.rename)
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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 = _posix_normpath
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path_from_environ = _posix_path_from_environ
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_get_home_dir = _posix_get_home_dir
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getuser_unicode = _posix_getuser_unicode
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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 lazily 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 = _rename_wrap_exception(_win32_rename)
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from brzlib import _walkdirs_win32
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lstat = _walkdirs_win32.lstat
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fstat = _walkdirs_win32.fstat
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wrap_stat = _walkdirs_win32.wrap_stat
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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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path_from_environ = win32utils.get_environ_unicode
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_get_home_dir = win32utils.get_home_location
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getuser_unicode = win32utils.get_user_name
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elif sys.platform == 'darwin':
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def get_terminal_encoding(trace=False):
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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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:param trace: If True trace the selected encoding via mutter().
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from brzlib.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',
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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('brz: 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 stat.S_ISDIR(os.lstat(f)[stat.ST_MODE])
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"""True if f is a regular file."""
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return stat.S_ISREG(os.lstat(f)[stat.ST_MODE])
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"""True if f is a symlink."""
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return stat.S_ISLNK(os.lstat(f)[stat.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 gmtime(seconds=None):
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"""Convert seconds since the Epoch to a time tuple expressing UTC (a.k.a.
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GMT). When 'seconds' is not passed in, convert the current time instead.
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Handy replacement for time.gmtime() buggy on Windows and 32-bit platforms.
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seconds = time.time()
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return (datetime(1970, 1, 1) + timedelta(seconds=seconds)).timetuple()
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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.
881
:param t: Seconds since the epoch.
882
:param offset: Timezone offset in seconds east of utc.
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tt = 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)
890
if offset_str is None:
891
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
892
_cache[offset] = offset_str
893
return date_str + offset_str
896
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
898
"""Return an unicode date string formatted according to the current locale.
900
:param t: Seconds since the epoch.
901
:param offset: Timezone offset in seconds east of utc.
902
:param timezone: How to display the time: 'utc', 'original' for the
903
timezone specified by offset, or 'local' for the process's current
905
:param date_fmt: strftime format.
906
:param show_offset: Whether to append the timezone.
908
(date_fmt, tt, offset_str) = \
909
_format_date(t, offset, timezone, date_fmt, show_offset)
910
date_str = time.strftime(date_fmt, tt)
911
if not isinstance(date_str, unicode):
912
date_str = date_str.decode(get_user_encoding(), 'replace')
913
return date_str + offset_str
916
def _format_date(t, offset, timezone, date_fmt, show_offset):
917
if timezone == 'utc':
920
elif timezone == 'original':
923
tt = gmtime(t + offset)
924
elif timezone == 'local':
925
tt = time.localtime(t)
926
offset = local_time_offset(t)
928
raise errors.UnsupportedTimezoneFormat(timezone)
930
date_fmt = "%a %Y-%m-%d %H:%M:%S"
932
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
935
return (date_fmt, tt, offset_str)
938
def compact_date(when):
939
return time.strftime('%Y%m%d%H%M%S', gmtime(when))
942
def format_delta(delta):
943
"""Get a nice looking string for a time delta.
945
:param delta: The time difference in seconds, can be positive or negative.
946
positive indicates time in the past, negative indicates time in the
947
future. (usually time.time() - stored_time)
948
:return: String formatted to show approximate resolution
954
direction = 'in the future'
958
if seconds < 90: # print seconds up to 90 seconds
960
return '%d second %s' % (seconds, direction,)
962
return '%d seconds %s' % (seconds, direction)
964
minutes = int(seconds / 60)
965
seconds -= 60 * minutes
970
if minutes < 90: # print minutes, seconds up to 90 minutes
972
return '%d minute, %d second%s %s' % (
973
minutes, seconds, plural_seconds, direction)
975
return '%d minutes, %d second%s %s' % (
976
minutes, seconds, plural_seconds, direction)
978
hours = int(minutes / 60)
979
minutes -= 60 * hours
986
return '%d hour, %d minute%s %s' % (hours, minutes,
987
plural_minutes, direction)
988
return '%d hours, %d minute%s %s' % (hours, minutes,
989
plural_minutes, direction)
992
"""Return size of given open file."""
993
return os.fstat(f.fileno())[stat.ST_SIZE]
996
# Alias os.urandom to support platforms (which?) without /dev/urandom and
997
# override if it doesn't work. Avoid checking on windows where there is
998
# significant initialisation cost that can be avoided for some bzr calls.
1000
rand_bytes = os.urandom
1002
if rand_bytes.__module__ != "nt":
1005
except NotImplementedError:
1006
# not well seeded, but better than nothing
1011
s += chr(random.randint(0, 255))
1016
ALNUM = '0123456789abcdefghijklmnopqrstuvwxyz'
1017
def rand_chars(num):
1018
"""Return a random string of num alphanumeric characters
1020
The result only contains lowercase chars because it may be used on
1021
case-insensitive filesystems.
1024
for raw_byte in rand_bytes(num):
1025
s += ALNUM[ord(raw_byte) % 36]
1029
## TODO: We could later have path objects that remember their list
1030
## decomposition (might be too tricksy though.)
1033
"""Turn string into list of parts."""
1034
# split on either delimiter because people might use either on
1036
ps = re.split(r'[\\/]', p)
1041
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1042
elif (f == '.') or (f == ''):
1051
if (f == '..') or (f is None) or (f == ''):
1052
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1056
def parent_directories(filename):
1057
"""Return the list of parent directories, deepest first.
1059
For example, parent_directories("a/b/c") -> ["a/b", "a"].
1062
parts = splitpath(dirname(filename))
1064
parents.append(joinpath(parts))
1069
_extension_load_failures = []
1072
def failed_to_load_extension(exception):
1073
"""Handle failing to load a binary extension.
1075
This should be called from the ImportError block guarding the attempt to
1076
import the native extension. If this function returns, the pure-Python
1077
implementation should be loaded instead::
1080
>>> import brzlib._fictional_extension_pyx
1081
>>> except ImportError, e:
1082
>>> brzlib.osutils.failed_to_load_extension(e)
1083
>>> import brzlib._fictional_extension_py
1085
# NB: This docstring is just an example, not a doctest, because doctest
1086
# currently can't cope with the use of lazy imports in this namespace --
1089
# This currently doesn't report the failure at the time it occurs, because
1090
# they tend to happen very early in startup when we can't check config
1091
# files etc, and also we want to report all failures but not spam the user
1093
exception_str = str(exception)
1094
if exception_str not in _extension_load_failures:
1095
trace.mutter("failed to load compiled extension: %s" % exception_str)
1096
_extension_load_failures.append(exception_str)
1099
def report_extension_load_failures():
1100
if not _extension_load_failures:
1102
if config.GlobalStack().get('ignore_missing_extensions'):
1104
# the warnings framework should by default show this only once
1105
from brzlib.trace import warning
1107
"brz: warning: some compiled extensions could not be loaded; "
1108
"see <https://answers.launchpad.net/bzr/+faq/703>")
1109
# we no longer show the specific missing extensions here, because it makes
1110
# the message too long and scary - see
1111
# https://bugs.launchpad.net/bzr/+bug/430529
1115
from brzlib._chunks_to_lines_pyx import chunks_to_lines
1116
except ImportError, e:
1117
failed_to_load_extension(e)
1118
from brzlib._chunks_to_lines_py import chunks_to_lines
1122
"""Split s into lines, but without removing the newline characters."""
1123
# Trivially convert a fulltext into a 'chunked' representation, and let
1124
# chunks_to_lines do the heavy lifting.
1125
if isinstance(s, str):
1126
# chunks_to_lines only supports 8-bit strings
1127
return chunks_to_lines([s])
1129
return _split_lines(s)
1132
def _split_lines(s):
1133
"""Split s into lines, but without removing the newline characters.
1135
This supports Unicode or plain string objects.
1137
lines = s.split('\n')
1138
result = [line + '\n' for line in lines[:-1]]
1140
result.append(lines[-1])
1144
def hardlinks_good():
1145
return sys.platform not in ('win32', 'cygwin', 'darwin')
1148
def link_or_copy(src, dest):
1149
"""Hardlink a file, or copy it if it can't be hardlinked."""
1150
if not hardlinks_good():
1151
shutil.copyfile(src, dest)
1155
except (OSError, IOError), e:
1156
if e.errno != errno.EXDEV:
1158
shutil.copyfile(src, dest)
1161
def delete_any(path):
1162
"""Delete a file, symlink or directory.
1164
Will delete even if readonly.
1167
_delete_file_or_dir(path)
1168
except (OSError, IOError), e:
1169
if e.errno in (errno.EPERM, errno.EACCES):
1170
# make writable and try again
1173
except (OSError, IOError):
1175
_delete_file_or_dir(path)
1180
def _delete_file_or_dir(path):
1181
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
1182
# Forgiveness than Permission (EAFP) because:
1183
# - root can damage a solaris file system by using unlink,
1184
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
1185
# EACCES, OSX: EPERM) when invoked on a directory.
1186
if isdir(path): # Takes care of symlinks
1193
if getattr(os, 'symlink', None) is not None:
1199
def has_hardlinks():
1200
if getattr(os, 'link', None) is not None:
1206
def host_os_dereferences_symlinks():
1207
return (has_symlinks()
1208
and sys.platform not in ('cygwin', 'win32'))
1211
def readlink(abspath):
1212
"""Return a string representing the path to which the symbolic link points.
1214
:param abspath: The link absolute unicode path.
1216
This his guaranteed to return the symbolic link in unicode in all python
1219
link = abspath.encode(_fs_enc)
1220
target = os.readlink(link)
1221
target = target.decode(_fs_enc)
1225
def contains_whitespace(s):
1226
"""True if there are any whitespace characters in s."""
1227
# string.whitespace can include '\xa0' in certain locales, because it is
1228
# considered "non-breaking-space" as part of ISO-8859-1. But it
1229
# 1) Isn't a breaking whitespace
1230
# 2) Isn't one of ' \t\r\n' which are characters we sometimes use as
1232
# 3) '\xa0' isn't unicode safe since it is >128.
1234
# This should *not* be a unicode set of characters in case the source
1235
# string is not a Unicode string. We can auto-up-cast the characters since
1236
# they are ascii, but we don't want to auto-up-cast the string in case it
1238
for ch in ' \t\n\r\v\f':
1245
def contains_linebreaks(s):
1246
"""True if there is any vertical whitespace in s."""
1254
def relpath(base, path):
1255
"""Return path relative to base, or raise PathNotChild exception.
1257
The path may be either an absolute path or a path relative to the
1258
current working directory.
1260
os.path.commonprefix (python2.4) has a bad bug that it works just
1261
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
1262
avoids that problem.
1264
NOTE: `base` should not have a trailing slash otherwise you'll get
1265
PathNotChild exceptions regardless of `path`.
1268
if len(base) < MIN_ABS_PATHLENGTH:
1269
# must have space for e.g. a drive letter
1270
raise ValueError(gettext('%r is too short to calculate a relative path')
1278
if len(head) <= len(base) and head != base:
1279
raise errors.PathNotChild(rp, base)
1282
head, tail = split(head)
1287
return pathjoin(*reversed(s))
1292
def _cicp_canonical_relpath(base, path):
1293
"""Return the canonical path relative to base.
1295
Like relpath, but on case-insensitive-case-preserving file-systems, this
1296
will return the relpath as stored on the file-system rather than in the
1297
case specified in the input string, for all existing portions of the path.
1299
This will cause O(N) behaviour if called for every path in a tree; if you
1300
have a number of paths to convert, you should use canonical_relpaths().
1302
# TODO: it should be possible to optimize this for Windows by using the
1303
# win32 API FindFiles function to look for the specified name - but using
1304
# os.listdir() still gives us the correct, platform agnostic semantics in
1307
rel = relpath(base, path)
1308
# '.' will have been turned into ''
1312
abs_base = abspath(base)
1314
_listdir = os.listdir
1316
# use an explicit iterator so we can easily consume the rest on early exit.
1317
bit_iter = iter(rel.split('/'))
1318
for bit in bit_iter:
1321
next_entries = _listdir(current)
1322
except OSError: # enoent, eperm, etc
1323
# We can't find this in the filesystem, so just append the
1325
current = pathjoin(current, bit, *list(bit_iter))
1327
for look in next_entries:
1328
if lbit == look.lower():
1329
current = pathjoin(current, look)
1332
# got to the end, nothing matched, so we just return the
1333
# non-existing bits as they were specified (the filename may be
1334
# the target of a move, for example).
1335
current = pathjoin(current, bit, *list(bit_iter))
1337
return current[len(abs_base):].lstrip('/')
1339
# XXX - TODO - we need better detection/integration of case-insensitive
1340
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1341
# filesystems), for example, so could probably benefit from the same basic
1342
# support there. For now though, only Windows and OSX get that support, and
1343
# they get it for *all* file-systems!
1344
if sys.platform in ('win32', 'darwin'):
1345
canonical_relpath = _cicp_canonical_relpath
1347
canonical_relpath = relpath
1349
def canonical_relpaths(base, paths):
1350
"""Create an iterable to canonicalize a sequence of relative paths.
1352
The intent is for this implementation to use a cache, vastly speeding
1353
up multiple transformations in the same directory.
1355
# but for now, we haven't optimized...
1356
return [canonical_relpath(base, p) for p in paths]
1359
def decode_filename(filename):
1360
"""Decode the filename using the filesystem encoding
1362
If it is unicode, it is returned.
1363
Otherwise it is decoded from the the filesystem's encoding. If decoding
1364
fails, a errors.BadFilenameEncoding exception is raised.
1366
if type(filename) is unicode:
1369
return filename.decode(_fs_enc)
1370
except UnicodeDecodeError:
1371
raise errors.BadFilenameEncoding(filename, _fs_enc)
1374
def safe_unicode(unicode_or_utf8_string):
1375
"""Coerce unicode_or_utf8_string into unicode.
1377
If it is unicode, it is returned.
1378
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1379
wrapped in a BzrBadParameterNotUnicode exception.
1381
if isinstance(unicode_or_utf8_string, unicode):
1382
return unicode_or_utf8_string
1384
return unicode_or_utf8_string.decode('utf8')
1385
except UnicodeDecodeError:
1386
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1389
def safe_utf8(unicode_or_utf8_string):
1390
"""Coerce unicode_or_utf8_string to a utf8 string.
1392
If it is a str, it is returned.
1393
If it is Unicode, it is encoded into a utf-8 string.
1395
if isinstance(unicode_or_utf8_string, str):
1396
# TODO: jam 20070209 This is overkill, and probably has an impact on
1397
# performance if we are dealing with lots of apis that want a
1400
# Make sure it is a valid utf-8 string
1401
unicode_or_utf8_string.decode('utf-8')
1402
except UnicodeDecodeError:
1403
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1404
return unicode_or_utf8_string
1405
return unicode_or_utf8_string.encode('utf-8')
1408
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1409
' Revision id generators should be creating utf8'
1413
def safe_revision_id(unicode_or_utf8_string, warn=True):
1414
"""Revision ids should now be utf8, but at one point they were unicode.
1416
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1418
:param warn: Functions that are sanitizing user data can set warn=False
1419
:return: None or a utf8 revision id.
1421
if (unicode_or_utf8_string is None
1422
or unicode_or_utf8_string.__class__ == str):
1423
return unicode_or_utf8_string
1425
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1427
return cache_utf8.encode(unicode_or_utf8_string)
1430
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1431
' generators should be creating utf8 file ids.')
1434
def safe_file_id(unicode_or_utf8_string, warn=True):
1435
"""File ids should now be utf8, but at one point they were unicode.
1437
This is the same as safe_utf8, except it uses the cached encode functions
1438
to save a little bit of performance.
1440
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1442
:param warn: Functions that are sanitizing user data can set warn=False
1443
:return: None or a utf8 file id.
1445
if (unicode_or_utf8_string is None
1446
or unicode_or_utf8_string.__class__ == str):
1447
return unicode_or_utf8_string
1449
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1451
return cache_utf8.encode(unicode_or_utf8_string)
1454
_platform_normalizes_filenames = False
1455
if sys.platform == 'darwin':
1456
_platform_normalizes_filenames = True
1459
def normalizes_filenames():
1460
"""Return True if this platform normalizes unicode filenames.
1464
return _platform_normalizes_filenames
1467
def _accessible_normalized_filename(path):
1468
"""Get the unicode normalized path, and if you can access the file.
1470
On platforms where the system normalizes filenames (Mac OSX),
1471
you can access a file by any path which will normalize correctly.
1472
On platforms where the system does not normalize filenames
1473
(everything else), you have to access a file by its exact path.
1475
Internally, bzr only supports NFC normalization, since that is
1476
the standard for XML documents.
1478
So return the normalized path, and a flag indicating if the file
1479
can be accessed by that path.
1482
return unicodedata.normalize('NFC', unicode(path)), True
1485
def _inaccessible_normalized_filename(path):
1486
__doc__ = _accessible_normalized_filename.__doc__
1488
normalized = unicodedata.normalize('NFC', unicode(path))
1489
return normalized, normalized == path
1492
if _platform_normalizes_filenames:
1493
normalized_filename = _accessible_normalized_filename
1495
normalized_filename = _inaccessible_normalized_filename
1498
def set_signal_handler(signum, handler, restart_syscall=True):
1499
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1500
on platforms that support that.
1502
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1503
automatically restart (by calling `signal.siginterrupt(signum,
1504
False)`). May be ignored if the feature is not available on this
1505
platform or Python version.
1509
siginterrupt = signal.siginterrupt
1511
# This python implementation doesn't provide signal support, hence no
1514
except AttributeError:
1515
# siginterrupt doesn't exist on this platform, or for this version
1517
siginterrupt = lambda signum, flag: None
1519
def sig_handler(*args):
1520
# Python resets the siginterrupt flag when a signal is
1521
# received. <http://bugs.python.org/issue8354>
1522
# As a workaround for some cases, set it back the way we want it.
1523
siginterrupt(signum, False)
1524
# Now run the handler function passed to set_signal_handler.
1527
sig_handler = handler
1528
old_handler = signal.signal(signum, sig_handler)
1530
siginterrupt(signum, False)
1534
default_terminal_width = 80
1535
"""The default terminal width for ttys.
1537
This is defined so that higher levels can share a common fallback value when
1538
terminal_width() returns None.
1541
# Keep some state so that terminal_width can detect if _terminal_size has
1542
# returned a different size since the process started. See docstring and
1543
# comments of terminal_width for details.
1544
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1545
_terminal_size_state = 'no_data'
1546
_first_terminal_size = None
1548
def terminal_width():
1549
"""Return terminal width.
1551
None is returned if the width can't established precisely.
1554
- if BZR_COLUMNS is set, returns its value
1555
- if there is no controlling terminal, returns None
1556
- query the OS, if the queried size has changed since the last query,
1558
- if COLUMNS is set, returns its value,
1559
- if the OS has a value (even though it's never changed), return its value.
1561
From there, we need to query the OS to get the size of the controlling
1564
On Unices we query the OS by:
1565
- get termios.TIOCGWINSZ
1566
- if an error occurs or a negative value is obtained, returns None
1568
On Windows we query the OS by:
1569
- win32utils.get_console_size() decides,
1570
- returns None on error (provided default value)
1572
# Note to implementors: if changing the rules for determining the width,
1573
# make sure you've considered the behaviour in these cases:
1574
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1575
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1577
# - (add more interesting cases here, if you find any)
1578
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1579
# but we don't want to register a signal handler because it is impossible
1580
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1581
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1582
# time so we can notice if the reported size has changed, which should have
1585
# If BZR_COLUMNS is set, take it, user is always right
1586
# Except if they specified 0 in which case, impose no limit here
1588
width = int(os.environ['BZR_COLUMNS'])
1589
except (KeyError, ValueError):
1591
if width is not None:
1597
isatty = getattr(sys.stdout, 'isatty', None)
1598
if isatty is None or not isatty():
1599
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1603
width, height = os_size = _terminal_size(None, None)
1604
global _first_terminal_size, _terminal_size_state
1605
if _terminal_size_state == 'no_data':
1606
_first_terminal_size = os_size
1607
_terminal_size_state = 'unchanged'
1608
elif (_terminal_size_state == 'unchanged' and
1609
_first_terminal_size != os_size):
1610
_terminal_size_state = 'changed'
1612
# If the OS claims to know how wide the terminal is, and this value has
1613
# ever changed, use that.
1614
if _terminal_size_state == 'changed':
1615
if width is not None and width > 0:
1618
# If COLUMNS is set, use it.
1620
return int(os.environ['COLUMNS'])
1621
except (KeyError, ValueError):
1624
# Finally, use an unchanged size from the OS, if we have one.
1625
if _terminal_size_state == 'unchanged':
1626
if width is not None and width > 0:
1629
# The width could not be determined.
1633
def _win32_terminal_size(width, height):
1634
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1635
return width, height
1638
def _ioctl_terminal_size(width, height):
1640
import struct, fcntl, termios
1641
s = struct.pack('HHHH', 0, 0, 0, 0)
1642
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1643
height, width = struct.unpack('HHHH', x)[0:2]
1644
except (IOError, AttributeError):
1646
return width, height
1648
_terminal_size = None
1649
"""Returns the terminal size as (width, height).
1651
:param width: Default value for width.
1652
:param height: Default value for height.
1654
This is defined specifically for each OS and query the size of the controlling
1655
terminal. If any error occurs, the provided default values should be returned.
1657
if sys.platform == 'win32':
1658
_terminal_size = _win32_terminal_size
1660
_terminal_size = _ioctl_terminal_size
1663
def supports_executable():
1664
return sys.platform != "win32"
1667
def supports_posix_readonly():
1668
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1670
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1671
directory controls creation/deletion, etc.
1673
And under win32, readonly means that the directory itself cannot be
1674
deleted. The contents of a readonly directory can be changed, unlike POSIX
1675
where files in readonly directories cannot be added, deleted or renamed.
1677
return sys.platform != "win32"
1680
def set_or_unset_env(env_variable, value):
1681
"""Modify the environment, setting or removing the env_variable.
1683
:param env_variable: The environment variable in question
1684
:param value: The value to set the environment to. If None, then
1685
the variable will be removed.
1686
:return: The original value of the environment variable.
1688
orig_val = os.environ.get(env_variable)
1690
if orig_val is not None:
1691
del os.environ[env_variable]
1693
if isinstance(value, unicode):
1694
value = value.encode(get_user_encoding())
1695
os.environ[env_variable] = value
1699
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1702
def check_legal_path(path):
1703
"""Check whether the supplied path is legal.
1704
This is only required on Windows, so we don't test on other platforms
1707
if sys.platform != "win32":
1709
if _validWin32PathRE.match(path) is None:
1710
raise errors.IllegalPath(path)
1713
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1715
def _is_error_enotdir(e):
1716
"""Check if this exception represents ENOTDIR.
1718
Unfortunately, python is very inconsistent about the exception
1719
here. The cases are:
1720
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1721
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1722
which is the windows error code.
1723
3) Windows, Python2.5 uses errno == EINVAL and
1724
winerror == ERROR_DIRECTORY
1726
:param e: An Exception object (expected to be OSError with an errno
1727
attribute, but we should be able to cope with anything)
1728
:return: True if this represents an ENOTDIR error. False otherwise.
1730
en = getattr(e, 'errno', None)
1731
if (en == errno.ENOTDIR
1732
or (sys.platform == 'win32'
1733
and (en == _WIN32_ERROR_DIRECTORY
1734
or (en == errno.EINVAL
1735
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1741
def walkdirs(top, prefix=""):
1742
"""Yield data about all the directories in a tree.
1744
This yields all the data about the contents of a directory at a time.
1745
After each directory has been yielded, if the caller has mutated the list
1746
to exclude some directories, they are then not descended into.
1748
The data yielded is of the form:
1749
((directory-relpath, directory-path-from-top),
1750
[(relpath, basename, kind, lstat, path-from-top), ...]),
1751
- directory-relpath is the relative path of the directory being returned
1752
with respect to top. prefix is prepended to this.
1753
- directory-path-from-root is the path including top for this directory.
1754
It is suitable for use with os functions.
1755
- relpath is the relative path within the subtree being walked.
1756
- basename is the basename of the path
1757
- kind is the kind of the file now. If unknown then the file is not
1758
present within the tree - but it may be recorded as versioned. See
1760
- lstat is the stat data *if* the file was statted.
1761
- planned, not implemented:
1762
path_from_tree_root is the path from the root of the tree.
1764
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1765
allows one to walk a subtree but get paths that are relative to a tree
1767
:return: an iterator over the dirs.
1769
#TODO there is a bit of a smell where the results of the directory-
1770
# summary in this, and the path from the root, may not agree
1771
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1772
# potentially confusing output. We should make this more robust - but
1773
# not at a speed cost. RBC 20060731
1775
_directory = _directory_kind
1776
_listdir = os.listdir
1777
_kind_from_mode = file_kind_from_stat_mode
1778
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1780
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1781
relroot, _, _, _, top = pending.pop()
1783
relprefix = relroot + u'/'
1786
top_slash = top + u'/'
1789
append = dirblock.append
1791
names = sorted(map(decode_filename, _listdir(top)))
1793
if not _is_error_enotdir(e):
1797
abspath = top_slash + name
1798
statvalue = _lstat(abspath)
1799
kind = _kind_from_mode(statvalue.st_mode)
1800
append((relprefix + name, name, kind, statvalue, abspath))
1801
yield (relroot, top), dirblock
1803
# push the user specified dirs from dirblock
1804
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1807
class DirReader(object):
1808
"""An interface for reading directories."""
1810
def top_prefix_to_starting_dir(self, top, prefix=""):
1811
"""Converts top and prefix to a starting dir entry
1813
:param top: A utf8 path
1814
:param prefix: An optional utf8 path to prefix output relative paths
1816
:return: A tuple starting with prefix, and ending with the native
1819
raise NotImplementedError(self.top_prefix_to_starting_dir)
1821
def read_dir(self, prefix, top):
1822
"""Read a specific dir.
1824
:param prefix: A utf8 prefix to be preprended to the path basenames.
1825
:param top: A natively encoded path to read.
1826
:return: A list of the directories contents. Each item contains:
1827
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1829
raise NotImplementedError(self.read_dir)
1832
_selected_dir_reader = None
1835
def _walkdirs_utf8(top, prefix=""):
1836
"""Yield data about all the directories in a tree.
1838
This yields the same information as walkdirs() only each entry is yielded
1839
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1840
are returned as exact byte-strings.
1842
:return: yields a tuple of (dir_info, [file_info])
1843
dir_info is (utf8_relpath, path-from-top)
1844
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1845
if top is an absolute path, path-from-top is also an absolute path.
1846
path-from-top might be unicode or utf8, but it is the correct path to
1847
pass to os functions to affect the file in question. (such as os.lstat)
1849
global _selected_dir_reader
1850
if _selected_dir_reader is None:
1851
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1852
# Win98 doesn't have unicode apis like FindFirstFileW
1853
# TODO: We possibly could support Win98 by falling back to the
1854
# original FindFirstFile, and using TCHAR instead of WCHAR,
1855
# but that gets a bit tricky, and requires custom compiling
1858
from brzlib._walkdirs_win32 import Win32ReadDir
1859
_selected_dir_reader = Win32ReadDir()
1862
elif _fs_enc in ('utf-8', 'ascii'):
1864
from brzlib._readdir_pyx import UTF8DirReader
1865
_selected_dir_reader = UTF8DirReader()
1866
except ImportError, e:
1867
failed_to_load_extension(e)
1870
if _selected_dir_reader is None:
1871
# Fallback to the python version
1872
_selected_dir_reader = UnicodeDirReader()
1874
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1875
# But we don't actually uses 1-3 in pending, so set them to None
1876
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1877
read_dir = _selected_dir_reader.read_dir
1878
_directory = _directory_kind
1880
relroot, _, _, _, top = pending[-1].pop()
1883
dirblock = sorted(read_dir(relroot, top))
1884
yield (relroot, top), dirblock
1885
# push the user specified dirs from dirblock
1886
next = [d for d in reversed(dirblock) if d[2] == _directory]
1888
pending.append(next)
1891
class UnicodeDirReader(DirReader):
1892
"""A dir reader for non-utf8 file systems, which transcodes."""
1894
__slots__ = ['_utf8_encode']
1897
self._utf8_encode = codecs.getencoder('utf8')
1899
def top_prefix_to_starting_dir(self, top, prefix=""):
1900
"""See DirReader.top_prefix_to_starting_dir."""
1901
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1903
def read_dir(self, prefix, top):
1904
"""Read a single directory from a non-utf8 file system.
1906
top, and the abspath element in the output are unicode, all other paths
1907
are utf8. Local disk IO is done via unicode calls to listdir etc.
1909
This is currently the fallback code path when the filesystem encoding is
1910
not UTF-8. It may be better to implement an alternative so that we can
1911
safely handle paths that are not properly decodable in the current
1914
See DirReader.read_dir for details.
1916
_utf8_encode = self._utf8_encode
1918
_listdir = os.listdir
1919
_kind_from_mode = file_kind_from_stat_mode
1922
relprefix = prefix + '/'
1925
top_slash = top + u'/'
1928
append = dirblock.append
1929
for name in sorted(_listdir(top)):
1931
name_utf8 = _utf8_encode(name)[0]
1932
except UnicodeDecodeError:
1933
raise errors.BadFilenameEncoding(
1934
_utf8_encode(relprefix)[0] + name, _fs_enc)
1935
abspath = top_slash + name
1936
statvalue = _lstat(abspath)
1937
kind = _kind_from_mode(statvalue.st_mode)
1938
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1942
def copy_tree(from_path, to_path, handlers={}):
1943
"""Copy all of the entries in from_path into to_path.
1945
:param from_path: The base directory to copy.
1946
:param to_path: The target directory. If it does not exist, it will
1948
:param handlers: A dictionary of functions, which takes a source and
1949
destinations for files, directories, etc.
1950
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1951
'file', 'directory', and 'symlink' should always exist.
1952
If they are missing, they will be replaced with 'os.mkdir()',
1953
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1955
# Now, just copy the existing cached tree to the new location
1956
# We use a cheap trick here.
1957
# Absolute paths are prefixed with the first parameter
1958
# relative paths are prefixed with the second.
1959
# So we can get both the source and target returned
1960
# without any extra work.
1962
def copy_dir(source, dest):
1965
def copy_link(source, dest):
1966
"""Copy the contents of a symlink"""
1967
link_to = os.readlink(source)
1968
os.symlink(link_to, dest)
1970
real_handlers = {'file':shutil.copy2,
1971
'symlink':copy_link,
1972
'directory':copy_dir,
1974
real_handlers.update(handlers)
1976
if not os.path.exists(to_path):
1977
real_handlers['directory'](from_path, to_path)
1979
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1980
for relpath, name, kind, st, abspath in entries:
1981
real_handlers[kind](abspath, relpath)
1984
def copy_ownership_from_path(dst, src=None):
1985
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1987
If src is None, the containing directory is used as source. If chown
1988
fails, the error is ignored and a warning is printed.
1990
chown = getattr(os, 'chown', None)
1995
src = os.path.dirname(dst)
2001
chown(dst, s.st_uid, s.st_gid)
2004
'Unable to copy ownership from "%s" to "%s". '
2005
'You may want to set it manually.', src, dst)
2006
trace.log_exception_quietly()
2009
def path_prefix_key(path):
2010
"""Generate a prefix-order path key for path.
2012
This can be used to sort paths in the same way that walkdirs does.
2014
return (dirname(path) , path)
2017
def compare_paths_prefix_order(path_a, path_b):
2018
"""Compare path_a and path_b to generate the same order walkdirs uses."""
2019
key_a = path_prefix_key(path_a)
2020
key_b = path_prefix_key(path_b)
2021
return cmp(key_a, key_b)
2024
_cached_user_encoding = None
2027
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
2028
"""Find out what the preferred user encoding is.
2030
This is generally the encoding that is used for command line parameters
2031
and file contents. This may be different from the terminal encoding
2032
or the filesystem encoding.
2034
:return: A string defining the preferred user encoding
2036
global _cached_user_encoding
2037
if deprecated_passed(use_cache):
2038
warn_deprecated("use_cache should only have been used for tests",
2039
DeprecationWarning, stacklevel=2)
2040
if _cached_user_encoding is not None:
2041
return _cached_user_encoding
2043
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2044
# Use the existing locale settings and call nl_langinfo directly
2045
# rather than going through getpreferredencoding. This avoids
2046
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2047
# possibility of the setlocale call throwing an error.
2048
user_encoding = locale.nl_langinfo(locale.CODESET)
2050
# GZ 2011-12-19: On windows could call GetACP directly instead.
2051
user_encoding = locale.getpreferredencoding(False)
2054
user_encoding = codecs.lookup(user_encoding).name
2056
if user_encoding not in ("", "cp0"):
2057
sys.stderr.write('brz: warning:'
2058
' unknown encoding %s.'
2059
' Continuing with ascii encoding.\n'
2062
user_encoding = 'ascii'
2064
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2065
if user_encoding == 'ascii':
2066
if sys.platform == 'darwin':
2067
# OSX is special-cased in Python to have a UTF-8 filesystem
2068
# encoding and previously had LANG set here if not present.
2069
user_encoding = 'utf-8'
2070
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2071
# for some other posix platforms as well.
2073
_cached_user_encoding = user_encoding
2074
return user_encoding
2077
def get_diff_header_encoding():
2078
return get_terminal_encoding()
2081
def get_host_name():
2082
"""Return the current unicode host name.
2084
This is meant to be used in place of socket.gethostname() because that
2085
behaves inconsistently on different platforms.
2087
if sys.platform == "win32":
2088
return win32utils.get_host_name()
2091
return socket.gethostname().decode(get_user_encoding())
2094
# We must not read/write any more than 64k at a time from/to a socket so we
2095
# don't risk "no buffer space available" errors on some platforms. Windows in
2096
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2098
MAX_SOCKET_CHUNK = 64 * 1024
2100
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2101
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2102
_eno = getattr(errno, _eno, None)
2103
if _eno is not None:
2104
_end_of_stream_errors.append(_eno)
2108
def read_bytes_from_socket(sock, report_activity=None,
2109
max_read_size=MAX_SOCKET_CHUNK):
2110
"""Read up to max_read_size of bytes from sock and notify of progress.
2112
Translates "Connection reset by peer" into file-like EOF (return an
2113
empty string rather than raise an error), and repeats the recv if
2114
interrupted by a signal.
2118
bytes = sock.recv(max_read_size)
2119
except socket.error, e:
2121
if eno in _end_of_stream_errors:
2122
# The connection was closed by the other side. Callers expect
2123
# an empty string to signal end-of-stream.
2125
elif eno == errno.EINTR:
2126
# Retry the interrupted recv.
2130
if report_activity is not None:
2131
report_activity(len(bytes), 'read')
2135
def recv_all(socket, count):
2136
"""Receive an exact number of bytes.
2138
Regular Socket.recv() may return less than the requested number of bytes,
2139
depending on what's in the OS buffer. MSG_WAITALL is not available
2140
on all platforms, but this should work everywhere. This will return
2141
less than the requested amount if the remote end closes.
2143
This isn't optimized and is intended mostly for use in testing.
2146
while len(b) < count:
2147
new = read_bytes_from_socket(socket, None, count - len(b))
2154
def send_all(sock, bytes, report_activity=None):
2155
"""Send all bytes on a socket.
2157
Breaks large blocks in smaller chunks to avoid buffering limitations on
2158
some platforms, and catches EINTR which may be thrown if the send is
2159
interrupted by a signal.
2161
This is preferred to socket.sendall(), because it avoids portability bugs
2162
and provides activity reporting.
2164
:param report_activity: Call this as bytes are read, see
2165
Transport._report_activity
2168
byte_count = len(bytes)
2169
while sent_total < byte_count:
2171
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2172
except (socket.error, IOError), e:
2173
if e.args[0] in _end_of_stream_errors:
2174
raise errors.ConnectionReset(
2175
"Error trying to write to socket", e)
2176
if e.args[0] != errno.EINTR:
2180
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2183
if report_activity is not None:
2184
report_activity(sent, 'write')
2187
def connect_socket(address):
2188
# Slight variation of the socket.create_connection() function (provided by
2189
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2190
# provide it for previous python versions. Also, we don't use the timeout
2191
# parameter (provided by the python implementation) so we don't implement
2193
err = socket.error('getaddrinfo returns an empty list')
2194
host, port = address
2195
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2196
af, socktype, proto, canonname, sa = res
2199
sock = socket.socket(af, socktype, proto)
2203
except socket.error, err:
2204
# 'err' is now the most recent error
2205
if sock is not None:
2210
def dereference_path(path):
2211
"""Determine the real path to a file.
2213
All parent elements are dereferenced. But the file itself is not
2215
:param path: The original path. May be absolute or relative.
2216
:return: the real path *to* the file
2218
parent, base = os.path.split(path)
2219
# The pathjoin for '.' is a workaround for Python bug #1213894.
2220
# (initial path components aren't dereferenced)
2221
return pathjoin(realpath(pathjoin('.', parent)), base)
2224
def supports_mapi():
2225
"""Return True if we can use MAPI to launch a mail client."""
2226
return sys.platform == "win32"
2229
def resource_string(package, resource_name):
2230
"""Load a resource from a package and return it as a string.
2232
Note: Only packages that start with brzlib are currently supported.
2234
This is designed to be a lightweight implementation of resource
2235
loading in a way which is API compatible with the same API from
2237
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2238
If and when pkg_resources becomes a standard library, this routine
2241
# Check package name is within brzlib
2242
if package == "brzlib":
2243
resource_relpath = resource_name
2244
elif package.startswith("brzlib."):
2245
package = package[len("brzlib."):].replace('.', os.sep)
2246
resource_relpath = pathjoin(package, resource_name)
2248
raise errors.BzrError('resource package %s not in brzlib' % package)
2250
# Map the resource to a file and read its contents
2251
base = dirname(brzlib.__file__)
2252
if getattr(sys, 'frozen', None): # bzr.exe
2253
base = abspath(pathjoin(base, '..', '..'))
2254
f = file(pathjoin(base, resource_relpath), "rU")
2260
def file_kind_from_stat_mode_thunk(mode):
2261
global file_kind_from_stat_mode
2262
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2264
from brzlib._readdir_pyx import UTF8DirReader
2265
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2266
except ImportError, e:
2267
# This is one time where we won't warn that an extension failed to
2268
# load. The extension is never available on Windows anyway.
2269
from brzlib._readdir_py import (
2270
_kind_from_mode as file_kind_from_stat_mode
2272
return file_kind_from_stat_mode(mode)
2273
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2275
def file_stat(f, _lstat=os.lstat):
2280
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2281
raise errors.NoSuchFile(f)
2284
def file_kind(f, _lstat=os.lstat):
2285
stat_value = file_stat(f, _lstat)
2286
return file_kind_from_stat_mode(stat_value.st_mode)
2288
def until_no_eintr(f, *a, **kw):
2289
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2291
WARNING: you must be certain that it is safe to retry the call repeatedly
2292
if EINTR does occur. This is typically only true for low-level operations
2293
like os.read. If in any doubt, don't use this.
2295
Keep in mind that this is not a complete solution to EINTR. There is
2296
probably code in the Python standard library and other dependencies that
2297
may encounter EINTR if a signal arrives (and there is signal handler for
2298
that signal). So this function can reduce the impact for IO that brzlib
2299
directly controls, but it is not a complete solution.
2301
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2305
except (IOError, OSError), e:
2306
if e.errno == errno.EINTR:
2311
@deprecated_function(deprecated_in((2, 2, 0)))
2312
def re_compile_checked(re_string, flags=0, where=""):
2313
"""Return a compiled re, or raise a sensible error.
2315
This should only be used when compiling user-supplied REs.
2317
:param re_string: Text form of regular expression.
2318
:param flags: eg re.IGNORECASE
2319
:param where: Message explaining to the user the context where
2320
it occurred, eg 'log search filter'.
2322
# from https://bugs.launchpad.net/bzr/+bug/251352
2324
re_obj = re.compile(re_string, flags)
2327
except errors.InvalidPattern, e:
2329
where = ' in ' + where
2330
# despite the name 'error' is a type
2331
raise errors.BzrCommandError('Invalid regular expression%s: %s'
2335
if sys.platform == "win32":
2338
return msvcrt.getch()
2343
fd = sys.stdin.fileno()
2344
settings = termios.tcgetattr(fd)
2347
ch = sys.stdin.read(1)
2349
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2352
if sys.platform.startswith('linux'):
2353
def _local_concurrency():
2355
return os.sysconf('SC_NPROCESSORS_ONLN')
2356
except (ValueError, OSError, AttributeError):
2358
elif sys.platform == 'darwin':
2359
def _local_concurrency():
2360
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2361
stdout=subprocess.PIPE).communicate()[0]
2362
elif "bsd" in sys.platform:
2363
def _local_concurrency():
2364
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2365
stdout=subprocess.PIPE).communicate()[0]
2366
elif sys.platform == 'sunos5':
2367
def _local_concurrency():
2368
return subprocess.Popen(['psrinfo', '-p',],
2369
stdout=subprocess.PIPE).communicate()[0]
2370
elif sys.platform == "win32":
2371
def _local_concurrency():
2372
# This appears to return the number of cores.
2373
return os.environ.get('NUMBER_OF_PROCESSORS')
2375
def _local_concurrency():
2380
_cached_local_concurrency = None
2382
def local_concurrency(use_cache=True):
2383
"""Return how many processes can be run concurrently.
2385
Rely on platform specific implementations and default to 1 (one) if
2386
anything goes wrong.
2388
global _cached_local_concurrency
2390
if _cached_local_concurrency is not None and use_cache:
2391
return _cached_local_concurrency
2393
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2394
if concurrency is None:
2396
import multiprocessing
2397
concurrency = multiprocessing.cpu_count()
2398
except (ImportError, NotImplementedError):
2399
# multiprocessing is only available on Python >= 2.6
2400
# and multiprocessing.cpu_count() isn't implemented on all
2403
concurrency = _local_concurrency()
2404
except (OSError, IOError):
2407
concurrency = int(concurrency)
2408
except (TypeError, ValueError):
2411
_cached_concurrency = concurrency
2415
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2416
"""A stream writer that doesn't decode str arguments."""
2418
def __init__(self, encode, stream, errors='strict'):
2419
codecs.StreamWriter.__init__(self, stream, errors)
2420
self.encode = encode
2422
def write(self, object):
2423
if type(object) is str:
2424
self.stream.write(object)
2426
data, _ = self.encode(object, self.errors)
2427
self.stream.write(data)
2429
if sys.platform == 'win32':
2430
def open_file(filename, mode='r', bufsize=-1):
2431
"""This function is used to override the ``open`` builtin.
2433
But it uses O_NOINHERIT flag so the file handle is not inherited by
2434
child processes. Deleting or renaming a closed file opened with this
2435
function is not blocking child processes.
2437
writing = 'w' in mode
2438
appending = 'a' in mode
2439
updating = '+' in mode
2440
binary = 'b' in mode
2443
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2444
# for flags for each modes.
2454
flags |= os.O_WRONLY
2455
flags |= os.O_CREAT | os.O_TRUNC
2460
flags |= os.O_WRONLY
2461
flags |= os.O_CREAT | os.O_APPEND
2466
flags |= os.O_RDONLY
2468
return os.fdopen(os.open(filename, flags), mode, bufsize)
2473
def available_backup_name(base, exists):
2474
"""Find a non-existing backup file name.
2476
This will *not* create anything, this only return a 'free' entry. This
2477
should be used for checking names in a directory below a locked
2478
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2479
Leap) and generally discouraged.
2481
:param base: The base name.
2483
:param exists: A callable returning True if the path parameter exists.
2486
name = "%s.~%d~" % (base, counter)
2489
name = "%s.~%d~" % (base, counter)
2493
def set_fd_cloexec(fd):
2494
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2495
support for this is not available.
2499
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2500
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2501
except (ImportError, AttributeError):
2502
# Either the fcntl module or specific constants are not present
2506
def find_executable_on_path(name):
2507
"""Finds an executable on the PATH.
2509
On Windows, this will try to append each extension in the PATHEXT
2510
environment variable to the name, if it cannot be found with the name
2513
:param name: The base name of the executable.
2514
:return: The path to the executable found or None.
2516
if sys.platform == 'win32':
2517
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2518
exts = [ext.lower() for ext in exts]
2519
base, ext = os.path.splitext(name)
2521
if ext.lower() not in exts:
2527
path = os.environ.get('PATH')
2528
if path is not None:
2529
path = path.split(os.pathsep)
2532
f = os.path.join(d, name) + ext
2533
if os.access(f, os.X_OK):
2535
if sys.platform == 'win32':
2536
app_path = win32utils.get_app_path(name)
2537
if app_path != name:
2542
def _posix_is_local_pid_dead(pid):
2543
"""True if pid doesn't correspond to live process on this machine"""
2545
# Special meaning of unix kill: just check if it's there.
2548
if e.errno == errno.ESRCH:
2549
# On this machine, and really not found: as sure as we can be
2552
elif e.errno == errno.EPERM:
2553
# exists, though not ours
2556
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2557
# Don't really know.
2560
# Exists and our process: not dead.
2563
if sys.platform == "win32":
2564
is_local_pid_dead = win32utils.is_local_pid_dead
2566
is_local_pid_dead = _posix_is_local_pid_dead
2568
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2569
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2570
if getattr(errno, name, None) is not None]
2573
def fdatasync(fileno):
2574
"""Flush file contents to disk if possible.
2576
:param fileno: Integer OS file handle.
2577
:raises TransportNotPossible: If flushing to disk is not possible.
2579
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2584
# See bug #1075108, on some platforms fdatasync exists, but can
2585
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2586
# and reduce the chance of corruption-on-powerloss situations. It
2587
# is not a mandatory call, so it is ok to suppress failures.
2588
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2589
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2593
def ensure_empty_directory_exists(path, exception_class):
2594
"""Make sure a local directory exists and is empty.
2596
If it does not exist, it is created. If it exists and is not empty, an
2597
instance of exception_class is raised.
2602
if e.errno != errno.EEXIST:
2604
if os.listdir(path) != []:
2605
raise exception_class(path)
2608
def is_environment_error(evalue):
2609
"""True if exception instance is due to a process environment issue
2611
This includes OSError and IOError, but also other errors that come from
2612
the operating system or core libraries but are not subclasses of those.
2614
if isinstance(evalue, (EnvironmentError, select.error)):
2616
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
brzlib/osutils.py
