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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from cStringIO import StringIO
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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 stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
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S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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# 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 (
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from tempfile import mkdtemp
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from bzrlib import (
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from bzrlib.i18n import gettext
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from bzrlib import symbol_versioning
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from bzrlib.symbol_versioning import (
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deprecated_function,
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from bzrlib.trace import mutter
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warn as warn_deprecated,
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from bzrlib 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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# 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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# On posix, use lstat instead of stat so that we can
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# operate on broken symlinks. On Windows revert to stat.
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lstat = getattr(os, 'lstat', os.stat)
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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 = lstat(filename).st_mode
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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mod = mod & 0777555
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os.chmod(filename, mod)
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chmod_if_possible(filename, mod)
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def make_writable(filename):
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mod = lstat(filename).st_mode
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
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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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unlink_func(tmp_name)
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rename_func(tmp_name, new)
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if failure_exc is not None:
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raise failure_exc[0], failure_exc[1], failure_exc[2]
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
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# choke on a Unicode string containing a relative path if
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
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_fs_enc = sys.getfilesystemencoding() or 'utf-8'
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def _posix_abspath(path):
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# jam 20060426 rather than encoding to fsencoding
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# copy posixpath.abspath, but use os.getcwdu instead
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if not posixpath.isabs(path):
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path = posixpath.join(getcwd(), path)
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return posixpath.normpath(path)
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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)
339
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
342
raise errors.BadFilenameEncoding(val, _fs_enc)
345
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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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
523
path_from_environ = win32utils.get_environ_unicode
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_get_home_dir = win32utils.get_home_location
525
getuser_unicode = win32utils.get_user_name
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elif sys.platform == 'darwin':
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getcwd = _mac_getcwd
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def get_terminal_encoding():
531
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
399
bzrlib.user_encoding.
536
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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539
http://mail.python.org/pipermail/python-list/2003-May/162357.html
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541
On my standard US Windows XP, the preferred encoding is
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542
cp1252, but the console is cp437
544
:param trace: If True trace the selected encoding via mutter().
546
from bzrlib.trace import mutter
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output_encoding = getattr(sys.stdout, 'encoding', None)
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548
if not output_encoding:
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input_encoding = getattr(sys.stdin, 'encoding', None)
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550
if not input_encoding:
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output_encoding = bzrlib.user_encoding
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mutter('encoding stdout as bzrlib.user_encoding %r', output_encoding)
551
output_encoding = get_user_encoding()
553
mutter('encoding stdout as osutils.get_user_encoding() %r',
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output_encoding = input_encoding
415
mutter('encoding stdout as sys.stdin encoding %r', output_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)
562
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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if output_encoding == 'cp0':
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# invalid encoding (cp0 means 'no codepage' on Windows)
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output_encoding = bzrlib.user_encoding
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mutter('cp0 is invalid encoding.'
422
' encoding stdout as bzrlib.user_encoding %r', output_encoding)
565
output_encoding = get_user_encoding()
567
mutter('cp0 is invalid encoding.'
568
' encoding stdout as osutils.get_user_encoding() %r',
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codecs.lookup(output_encoding)
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def pumpfile(fromfile, tofile):
540
"""Copy contents of one file to another."""
543
b = fromfile.read(BUFSIZE)
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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'):
660
"""Copy contents of one file to another.
662
The read_length can either be -1 to read to end-of-file (EOF) or
663
it can specify the maximum number of bytes to read.
665
The buff_size represents the maximum size for each read operation
666
performed on from_file.
668
:param report_activity: Call this as bytes are read, see
669
Transport._report_activity
670
:param direction: Will be passed to report_activity
672
:return: The number of bytes copied.
676
# read specified number of bytes
678
while read_length > 0:
679
num_bytes_to_read = min(read_length, buff_size)
681
block = from_file.read(num_bytes_to_read)
685
if report_activity is not None:
686
report_activity(len(block), direction)
689
actual_bytes_read = len(block)
690
read_length -= actual_bytes_read
691
length += actual_bytes_read
695
block = from_file.read(buff_size)
699
if report_activity is not None:
700
report_activity(len(block), direction)
706
def pump_string_file(bytes, file_handle, segment_size=None):
707
"""Write bytes to file_handle in many smaller writes.
709
:param bytes: The string to write.
710
:param file_handle: The file to write to.
712
# Write data in chunks rather than all at once, because very large
713
# writes fail on some platforms (e.g. Windows with SMB mounted
716
segment_size = 5242880 # 5MB
717
segments = range(len(bytes) / segment_size + 1)
718
write = file_handle.write
719
for segment_index in segments:
720
segment = buffer(bytes, segment_index * segment_size, segment_size)
549
724
def file_iterator(input_file, readsize=32768):
619
825
:param timezone: How to display the time: 'utc', 'original' for the
620
826
timezone specified by offset, or 'local' for the process's current
622
:param show_offset: Whether to append the timezone.
623
:param date_fmt: strftime format.
828
:param date_fmt: strftime format.
829
:param show_offset: Whether to append the timezone.
831
(date_fmt, tt, offset_str) = \
832
_format_date(t, offset, timezone, date_fmt, show_offset)
833
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
834
date_str = time.strftime(date_fmt, tt)
835
return date_str + offset_str
838
# Cache of formatted offset strings
842
def format_date_with_offset_in_original_timezone(t, offset=0,
843
_cache=_offset_cache):
844
"""Return a formatted date string in the original timezone.
846
This routine may be faster then format_date.
848
:param t: Seconds since the epoch.
849
:param offset: Timezone offset in seconds east of utc.
853
tt = time.gmtime(t + offset)
854
date_fmt = _default_format_by_weekday_num[tt[6]]
855
date_str = time.strftime(date_fmt, tt)
856
offset_str = _cache.get(offset, None)
857
if offset_str is None:
858
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
859
_cache[offset] = offset_str
860
return date_str + offset_str
863
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
865
"""Return an unicode date string formatted according to the current locale.
867
:param t: Seconds since the epoch.
868
:param offset: Timezone offset in seconds east of utc.
869
:param timezone: How to display the time: 'utc', 'original' for the
870
timezone specified by offset, or 'local' for the process's current
872
:param date_fmt: strftime format.
873
:param show_offset: Whether to append the timezone.
875
(date_fmt, tt, offset_str) = \
876
_format_date(t, offset, timezone, date_fmt, show_offset)
877
date_str = time.strftime(date_fmt, tt)
878
if not isinstance(date_str, unicode):
879
date_str = date_str.decode(get_user_encoding(), 'replace')
880
return date_str + offset_str
883
def _format_date(t, offset, timezone, date_fmt, show_offset):
625
884
if timezone == 'utc':
626
885
tt = time.gmtime(t)
755
raise errors.BzrError("sorry, %r not allowed in path" % f)
1008
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
756
1009
elif (f == '.') or (f == ''):
762
1016
def joinpath(p):
763
assert isinstance(p, (list, tuple))
765
1018
if (f == '..') or (f is None) or (f == ''):
766
raise errors.BzrError("sorry, %r not allowed in path" % f)
1019
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
767
1020
return pathjoin(*p)
1023
def parent_directories(filename):
1024
"""Return the list of parent directories, deepest first.
1026
For example, parent_directories("a/b/c") -> ["a/b", "a"].
1029
parts = splitpath(dirname(filename))
1031
parents.append(joinpath(parts))
1036
_extension_load_failures = []
1039
def failed_to_load_extension(exception):
1040
"""Handle failing to load a binary extension.
1042
This should be called from the ImportError block guarding the attempt to
1043
import the native extension. If this function returns, the pure-Python
1044
implementation should be loaded instead::
1047
>>> import bzrlib._fictional_extension_pyx
1048
>>> except ImportError, e:
1049
>>> bzrlib.osutils.failed_to_load_extension(e)
1050
>>> import bzrlib._fictional_extension_py
1052
# NB: This docstring is just an example, not a doctest, because doctest
1053
# currently can't cope with the use of lazy imports in this namespace --
1056
# This currently doesn't report the failure at the time it occurs, because
1057
# they tend to happen very early in startup when we can't check config
1058
# files etc, and also we want to report all failures but not spam the user
1060
exception_str = str(exception)
1061
if exception_str not in _extension_load_failures:
1062
trace.mutter("failed to load compiled extension: %s" % exception_str)
1063
_extension_load_failures.append(exception_str)
1066
def report_extension_load_failures():
1067
if not _extension_load_failures:
1069
if config.GlobalStack().get('ignore_missing_extensions'):
1071
# the warnings framework should by default show this only once
1072
from bzrlib.trace import warning
1074
"bzr: warning: some compiled extensions could not be loaded; "
1075
"see <https://answers.launchpad.net/bzr/+faq/703>")
1076
# we no longer show the specific missing extensions here, because it makes
1077
# the message too long and scary - see
1078
# https://bugs.launchpad.net/bzr/+bug/430529
1082
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1083
except ImportError, e:
1084
failed_to_load_extension(e)
1085
from bzrlib._chunks_to_lines_py import chunks_to_lines
770
1088
def split_lines(s):
771
1089
"""Split s into lines, but without removing the newline characters."""
1090
# Trivially convert a fulltext into a 'chunked' representation, and let
1091
# chunks_to_lines do the heavy lifting.
1092
if isinstance(s, str):
1093
# chunks_to_lines only supports 8-bit strings
1094
return chunks_to_lines([s])
1096
return _split_lines(s)
1099
def _split_lines(s):
1100
"""Split s into lines, but without removing the newline characters.
1102
This supports Unicode or plain string objects.
772
1104
lines = s.split('\n')
773
1105
result = [line + '\n' for line in lines[:-1]]
848
1227
os.path.commonprefix (python2.4) has a bad bug that it works just
849
1228
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
850
1229
avoids that problem.
1231
NOTE: `base` should not have a trailing slash otherwise you'll get
1232
PathNotChild exceptions regardless of `path`.
853
assert len(base) >= MIN_ABS_PATHLENGTH, ('Length of base must be equal or'
854
' exceed the platform minimum length (which is %d)' %
1235
if len(base) < MIN_ABS_PATHLENGTH:
1236
# must have space for e.g. a drive letter
1237
raise ValueError(gettext('%r is too short to calculate a relative path')
857
1240
rp = abspath(path)
861
while len(head) >= len(base):
1245
if len(head) <= len(base) and head != base:
1246
raise errors.PathNotChild(rp, base)
862
1247
if head == base:
864
head, tail = os.path.split(head)
1249
head, tail = split(head)
868
raise errors.PathNotChild(rp, base)
1254
return pathjoin(*reversed(s))
1259
def _cicp_canonical_relpath(base, path):
1260
"""Return the canonical path relative to base.
1262
Like relpath, but on case-insensitive-case-preserving file-systems, this
1263
will return the relpath as stored on the file-system rather than in the
1264
case specified in the input string, for all existing portions of the path.
1266
This will cause O(N) behaviour if called for every path in a tree; if you
1267
have a number of paths to convert, you should use canonical_relpaths().
1269
# TODO: it should be possible to optimize this for Windows by using the
1270
# win32 API FindFiles function to look for the specified name - but using
1271
# os.listdir() still gives us the correct, platform agnostic semantics in
1274
rel = relpath(base, path)
1275
# '.' will have been turned into ''
1279
abs_base = abspath(base)
1281
_listdir = os.listdir
1283
# use an explicit iterator so we can easily consume the rest on early exit.
1284
bit_iter = iter(rel.split('/'))
1285
for bit in bit_iter:
1288
next_entries = _listdir(current)
1289
except OSError: # enoent, eperm, etc
1290
# We can't find this in the filesystem, so just append the
1292
current = pathjoin(current, bit, *list(bit_iter))
1294
for look in next_entries:
1295
if lbit == look.lower():
1296
current = pathjoin(current, look)
1299
# got to the end, nothing matched, so we just return the
1300
# non-existing bits as they were specified (the filename may be
1301
# the target of a move, for example).
1302
current = pathjoin(current, bit, *list(bit_iter))
1304
return current[len(abs_base):].lstrip('/')
1306
# XXX - TODO - we need better detection/integration of case-insensitive
1307
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1308
# filesystems), for example, so could probably benefit from the same basic
1309
# support there. For now though, only Windows and OSX get that support, and
1310
# they get it for *all* file-systems!
1311
if sys.platform in ('win32', 'darwin'):
1312
canonical_relpath = _cicp_canonical_relpath
1314
canonical_relpath = relpath
1316
def canonical_relpaths(base, paths):
1317
"""Create an iterable to canonicalize a sequence of relative paths.
1319
The intent is for this implementation to use a cache, vastly speeding
1320
up multiple transformations in the same directory.
1322
# but for now, we haven't optimized...
1323
return [canonical_relpath(base, p) for p in paths]
1326
def decode_filename(filename):
1327
"""Decode the filename using the filesystem encoding
1329
If it is unicode, it is returned.
1330
Otherwise it is decoded from the the filesystem's encoding. If decoding
1331
fails, a errors.BadFilenameEncoding exception is raised.
1333
if type(filename) is unicode:
1336
return filename.decode(_fs_enc)
1337
except UnicodeDecodeError:
1338
raise errors.BadFilenameEncoding(filename, _fs_enc)
876
1341
def safe_unicode(unicode_or_utf8_string):
877
1342
"""Coerce unicode_or_utf8_string into unicode.
879
1344
If it is unicode, it is returned.
880
Otherwise it is decoded from utf-8. If a decoding error
881
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
882
as a BzrBadParameter exception.
1345
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1346
wrapped in a BzrBadParameterNotUnicode exception.
884
1348
if isinstance(unicode_or_utf8_string, unicode):
885
1349
return unicode_or_utf8_string
998
1462
normalized_filename = _inaccessible_normalized_filename
1465
def set_signal_handler(signum, handler, restart_syscall=True):
1466
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1467
on platforms that support that.
1469
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1470
automatically restart (by calling `signal.siginterrupt(signum,
1471
False)`). May be ignored if the feature is not available on this
1472
platform or Python version.
1476
siginterrupt = signal.siginterrupt
1478
# This python implementation doesn't provide signal support, hence no
1481
except AttributeError:
1482
# siginterrupt doesn't exist on this platform, or for this version
1484
siginterrupt = lambda signum, flag: None
1486
def sig_handler(*args):
1487
# Python resets the siginterrupt flag when a signal is
1488
# received. <http://bugs.python.org/issue8354>
1489
# As a workaround for some cases, set it back the way we want it.
1490
siginterrupt(signum, False)
1491
# Now run the handler function passed to set_signal_handler.
1494
sig_handler = handler
1495
old_handler = signal.signal(signum, sig_handler)
1497
siginterrupt(signum, False)
1501
default_terminal_width = 80
1502
"""The default terminal width for ttys.
1504
This is defined so that higher levels can share a common fallback value when
1505
terminal_width() returns None.
1508
# Keep some state so that terminal_width can detect if _terminal_size has
1509
# returned a different size since the process started. See docstring and
1510
# comments of terminal_width for details.
1511
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1512
_terminal_size_state = 'no_data'
1513
_first_terminal_size = None
1001
1515
def terminal_width():
1002
"""Return estimated terminal width."""
1003
if sys.platform == 'win32':
1004
return win32utils.get_console_size()[0]
1516
"""Return terminal width.
1518
None is returned if the width can't established precisely.
1521
- if BZR_COLUMNS is set, returns its value
1522
- if there is no controlling terminal, returns None
1523
- query the OS, if the queried size has changed since the last query,
1525
- if COLUMNS is set, returns its value,
1526
- if the OS has a value (even though it's never changed), return its value.
1528
From there, we need to query the OS to get the size of the controlling
1531
On Unices we query the OS by:
1532
- get termios.TIOCGWINSZ
1533
- if an error occurs or a negative value is obtained, returns None
1535
On Windows we query the OS by:
1536
- win32utils.get_console_size() decides,
1537
- returns None on error (provided default value)
1539
# Note to implementors: if changing the rules for determining the width,
1540
# make sure you've considered the behaviour in these cases:
1541
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1542
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1544
# - (add more interesting cases here, if you find any)
1545
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1546
# but we don't want to register a signal handler because it is impossible
1547
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1548
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1549
# time so we can notice if the reported size has changed, which should have
1552
# If BZR_COLUMNS is set, take it, user is always right
1553
# Except if they specified 0 in which case, impose no limit here
1555
width = int(os.environ['BZR_COLUMNS'])
1556
except (KeyError, ValueError):
1558
if width is not None:
1564
isatty = getattr(sys.stdout, 'isatty', None)
1565
if isatty is None or not isatty():
1566
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1570
width, height = os_size = _terminal_size(None, None)
1571
global _first_terminal_size, _terminal_size_state
1572
if _terminal_size_state == 'no_data':
1573
_first_terminal_size = os_size
1574
_terminal_size_state = 'unchanged'
1575
elif (_terminal_size_state == 'unchanged' and
1576
_first_terminal_size != os_size):
1577
_terminal_size_state = 'changed'
1579
# If the OS claims to know how wide the terminal is, and this value has
1580
# ever changed, use that.
1581
if _terminal_size_state == 'changed':
1582
if width is not None and width > 0:
1585
# If COLUMNS is set, use it.
1587
return int(os.environ['COLUMNS'])
1588
except (KeyError, ValueError):
1591
# Finally, use an unchanged size from the OS, if we have one.
1592
if _terminal_size_state == 'unchanged':
1593
if width is not None and width > 0:
1596
# The width could not be determined.
1600
def _win32_terminal_size(width, height):
1601
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1602
return width, height
1605
def _ioctl_terminal_size(width, height):
1007
1607
import struct, fcntl, termios
1008
1608
s = struct.pack('HHHH', 0, 0, 0, 0)
1009
1609
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1010
width = struct.unpack('HHHH', x)[1]
1610
height, width = struct.unpack('HHHH', x)[0:2]
1611
except (IOError, AttributeError):
1015
width = int(os.environ['COLUMNS'])
1613
return width, height
1615
_terminal_size = None
1616
"""Returns the terminal size as (width, height).
1618
:param width: Default value for width.
1619
:param height: Default value for height.
1621
This is defined specifically for each OS and query the size of the controlling
1622
terminal. If any error occurs, the provided default values should be returned.
1624
if sys.platform == 'win32':
1625
_terminal_size = _win32_terminal_size
1627
_terminal_size = _ioctl_terminal_size
1024
1630
def supports_executable():
1071
1677
raise errors.IllegalPath(path)
1680
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1682
def _is_error_enotdir(e):
1683
"""Check if this exception represents ENOTDIR.
1685
Unfortunately, python is very inconsistent about the exception
1686
here. The cases are:
1687
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1688
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1689
which is the windows error code.
1690
3) Windows, Python2.5 uses errno == EINVAL and
1691
winerror == ERROR_DIRECTORY
1693
:param e: An Exception object (expected to be OSError with an errno
1694
attribute, but we should be able to cope with anything)
1695
:return: True if this represents an ENOTDIR error. False otherwise.
1697
en = getattr(e, 'errno', None)
1698
if (en == errno.ENOTDIR
1699
or (sys.platform == 'win32'
1700
and (en == _WIN32_ERROR_DIRECTORY
1701
or (en == errno.EINVAL
1702
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1074
1708
def walkdirs(top, prefix=""):
1075
1709
"""Yield data about all the directories in a tree.
1077
1711
This yields all the data about the contents of a directory at a time.
1078
1712
After each directory has been yielded, if the caller has mutated the list
1079
1713
to exclude some directories, they are then not descended into.
1081
1715
The data yielded is of the form:
1082
1716
((directory-relpath, directory-path-from-top),
1083
1717
[(relpath, basename, kind, lstat, path-from-top), ...]),
1084
1718
- directory-relpath is the relative path of the directory being returned
1085
1719
with respect to top. prefix is prepended to this.
1086
- directory-path-from-root is the path including top for this directory.
1720
- directory-path-from-root is the path including top for this directory.
1087
1721
It is suitable for use with os functions.
1088
1722
- relpath is the relative path within the subtree being walked.
1089
1723
- basename is the basename of the path
1145
1813
path-from-top might be unicode or utf8, but it is the correct path to
1146
1814
pass to os functions to affect the file in question. (such as os.lstat)
1148
fs_encoding = _fs_enc.upper()
1149
if (sys.platform == 'win32' or
1150
fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968')): # ascii
1151
return _walkdirs_unicode_to_utf8(top, prefix=prefix)
1153
return _walkdirs_fs_utf8(top, prefix=prefix)
1156
def _walkdirs_fs_utf8(top, prefix=""):
1157
"""See _walkdirs_utf8.
1159
This sub-function is called when we know the filesystem is already in utf8
1160
encoding. So we don't need to transcode filenames.
1163
_directory = _directory_kind
1164
_listdir = os.listdir
1165
_kind_from_mode = _formats.get
1816
global _selected_dir_reader
1817
if _selected_dir_reader is None:
1818
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1819
# Win98 doesn't have unicode apis like FindFirstFileW
1820
# TODO: We possibly could support Win98 by falling back to the
1821
# original FindFirstFile, and using TCHAR instead of WCHAR,
1822
# but that gets a bit tricky, and requires custom compiling
1825
from bzrlib._walkdirs_win32 import Win32ReadDir
1826
_selected_dir_reader = Win32ReadDir()
1829
elif _fs_enc in ('utf-8', 'ascii'):
1831
from bzrlib._readdir_pyx import UTF8DirReader
1832
_selected_dir_reader = UTF8DirReader()
1833
except ImportError, e:
1834
failed_to_load_extension(e)
1837
if _selected_dir_reader is None:
1838
# Fallback to the python version
1839
_selected_dir_reader = UnicodeDirReader()
1167
1841
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1168
1842
# But we don't actually uses 1-3 in pending, so set them to None
1169
pending = [(safe_utf8(prefix), None, None, None, safe_utf8(top))]
1843
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1844
read_dir = _selected_dir_reader.read_dir
1845
_directory = _directory_kind
1171
relroot, _, _, _, top = pending.pop()
1173
relprefix = relroot + '/'
1176
top_slash = top + '/'
1179
append = dirblock.append
1180
for name in sorted(_listdir(top)):
1181
abspath = top_slash + name
1182
statvalue = _lstat(abspath)
1183
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1184
append((relprefix + name, name, kind, statvalue, abspath))
1847
relroot, _, _, _, top = pending[-1].pop()
1850
dirblock = sorted(read_dir(relroot, top))
1185
1851
yield (relroot, top), dirblock
1187
1852
# push the user specified dirs from dirblock
1188
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1191
def _walkdirs_unicode_to_utf8(top, prefix=""):
1192
"""See _walkdirs_utf8
1194
Because Win32 has a Unicode api, all of the 'path-from-top' entries will be
1196
This is currently the fallback code path when the filesystem encoding is
1197
not UTF-8. It may be better to implement an alternative so that we can
1198
safely handle paths that are not properly decodable in the current
1201
_utf8_encode = codecs.getencoder('utf8')
1203
_directory = _directory_kind
1204
_listdir = os.listdir
1205
_kind_from_mode = _formats.get
1207
pending = [(safe_utf8(prefix), None, None, None, safe_unicode(top))]
1209
relroot, _, _, _, top = pending.pop()
1211
relprefix = relroot + '/'
1853
next = [d for d in reversed(dirblock) if d[2] == _directory]
1855
pending.append(next)
1858
class UnicodeDirReader(DirReader):
1859
"""A dir reader for non-utf8 file systems, which transcodes."""
1861
__slots__ = ['_utf8_encode']
1864
self._utf8_encode = codecs.getencoder('utf8')
1866
def top_prefix_to_starting_dir(self, top, prefix=""):
1867
"""See DirReader.top_prefix_to_starting_dir."""
1868
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1870
def read_dir(self, prefix, top):
1871
"""Read a single directory from a non-utf8 file system.
1873
top, and the abspath element in the output are unicode, all other paths
1874
are utf8. Local disk IO is done via unicode calls to listdir etc.
1876
This is currently the fallback code path when the filesystem encoding is
1877
not UTF-8. It may be better to implement an alternative so that we can
1878
safely handle paths that are not properly decodable in the current
1881
See DirReader.read_dir for details.
1883
_utf8_encode = self._utf8_encode
1885
_listdir = os.listdir
1886
_kind_from_mode = file_kind_from_stat_mode
1889
relprefix = prefix + '/'
1214
1892
top_slash = top + u'/'
1287
1991
_cached_user_encoding = None
1290
def get_user_encoding(use_cache=True):
1994
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
1291
1995
"""Find out what the preferred user encoding is.
1293
1997
This is generally the encoding that is used for command line parameters
1294
1998
and file contents. This may be different from the terminal encoding
1295
1999
or the filesystem encoding.
1297
:param use_cache: Enable cache for detected encoding.
1298
(This parameter is turned on by default,
1299
and required only for selftesting)
1301
2001
:return: A string defining the preferred user encoding
1303
2003
global _cached_user_encoding
1304
if _cached_user_encoding is not None and use_cache:
2004
if deprecated_passed(use_cache):
2005
warn_deprecated("use_cache should only have been used for tests",
2006
DeprecationWarning, stacklevel=2)
2007
if _cached_user_encoding is not None:
1305
2008
return _cached_user_encoding
1307
if sys.platform == 'darwin':
1308
# work around egregious python 2.4 bug
1309
sys.platform = 'posix'
1313
sys.platform = 'darwin'
2010
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2011
# Use the existing locale settings and call nl_langinfo directly
2012
# rather than going through getpreferredencoding. This avoids
2013
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2014
# possibility of the setlocale call throwing an error.
2015
user_encoding = locale.nl_langinfo(locale.CODESET)
2017
# GZ 2011-12-19: On windows could call GetACP directly instead.
2018
user_encoding = locale.getpreferredencoding(False)
1318
user_encoding = locale.getpreferredencoding()
1319
except locale.Error, e:
1320
sys.stderr.write('bzr: warning: %s\n'
1321
' Could not determine what text encoding to use.\n'
1322
' This error usually means your Python interpreter\n'
1323
' doesn\'t support the locale set by $LANG (%s)\n'
1324
" Continuing with ascii encoding.\n"
1325
% (e, os.environ.get('LANG')))
1326
user_encoding = 'ascii'
1328
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1329
# treat that as ASCII, and not support printing unicode characters to the
1331
if user_encoding in (None, 'cp0'):
1332
user_encoding = 'ascii'
1336
codecs.lookup(user_encoding)
2021
user_encoding = codecs.lookup(user_encoding).name
2023
if user_encoding not in ("", "cp0"):
1338
2024
sys.stderr.write('bzr: warning:'
1339
2025
' unknown encoding %s.'
1340
2026
' Continuing with ascii encoding.\n'
1341
2027
% user_encoding
1343
user_encoding = 'ascii'
1346
_cached_user_encoding = user_encoding
2029
user_encoding = 'ascii'
2031
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2032
if user_encoding == 'ascii':
2033
if sys.platform == 'darwin':
2034
# OSX is special-cased in Python to have a UTF-8 filesystem
2035
# encoding and previously had LANG set here if not present.
2036
user_encoding = 'utf-8'
2037
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2038
# for some other posix platforms as well.
2040
_cached_user_encoding = user_encoding
1348
2041
return user_encoding
1351
def recv_all(socket, bytes):
2044
def get_diff_header_encoding():
2045
return get_terminal_encoding()
2048
def get_host_name():
2049
"""Return the current unicode host name.
2051
This is meant to be used in place of socket.gethostname() because that
2052
behaves inconsistently on different platforms.
2054
if sys.platform == "win32":
2055
return win32utils.get_host_name()
2058
return socket.gethostname().decode(get_user_encoding())
2061
# We must not read/write any more than 64k at a time from/to a socket so we
2062
# don't risk "no buffer space available" errors on some platforms. Windows in
2063
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2065
MAX_SOCKET_CHUNK = 64 * 1024
2067
_end_of_stream_errors = [errno.ECONNRESET]
2068
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2069
_eno = getattr(errno, _eno, None)
2070
if _eno is not None:
2071
_end_of_stream_errors.append(_eno)
2075
def read_bytes_from_socket(sock, report_activity=None,
2076
max_read_size=MAX_SOCKET_CHUNK):
2077
"""Read up to max_read_size of bytes from sock and notify of progress.
2079
Translates "Connection reset by peer" into file-like EOF (return an
2080
empty string rather than raise an error), and repeats the recv if
2081
interrupted by a signal.
2085
bytes = sock.recv(max_read_size)
2086
except socket.error, e:
2088
if eno in _end_of_stream_errors:
2089
# The connection was closed by the other side. Callers expect
2090
# an empty string to signal end-of-stream.
2092
elif eno == errno.EINTR:
2093
# Retry the interrupted recv.
2097
if report_activity is not None:
2098
report_activity(len(bytes), 'read')
2102
def recv_all(socket, count):
1352
2103
"""Receive an exact number of bytes.
1354
2105
Regular Socket.recv() may return less than the requested number of bytes,
1355
dependning on what's in the OS buffer. MSG_WAITALL is not available
2106
depending on what's in the OS buffer. MSG_WAITALL is not available
1356
2107
on all platforms, but this should work everywhere. This will return
1357
2108
less than the requested amount if the remote end closes.
1359
2110
This isn't optimized and is intended mostly for use in testing.
1362
while len(b) < bytes:
1363
new = socket.recv(bytes - len(b))
2113
while len(b) < count:
2114
new = read_bytes_from_socket(socket, None, count - len(b))
2121
def send_all(sock, bytes, report_activity=None):
2122
"""Send all bytes on a socket.
2124
Breaks large blocks in smaller chunks to avoid buffering limitations on
2125
some platforms, and catches EINTR which may be thrown if the send is
2126
interrupted by a signal.
2128
This is preferred to socket.sendall(), because it avoids portability bugs
2129
and provides activity reporting.
2131
:param report_activity: Call this as bytes are read, see
2132
Transport._report_activity
2135
byte_count = len(bytes)
2136
while sent_total < byte_count:
2138
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2139
except socket.error, e:
2140
if e.args[0] != errno.EINTR:
2144
report_activity(sent, 'write')
2147
def connect_socket(address):
2148
# Slight variation of the socket.create_connection() function (provided by
2149
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2150
# provide it for previous python versions. Also, we don't use the timeout
2151
# parameter (provided by the python implementation) so we don't implement
2153
err = socket.error('getaddrinfo returns an empty list')
2154
host, port = address
2155
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2156
af, socktype, proto, canonname, sa = res
2159
sock = socket.socket(af, socktype, proto)
2163
except socket.error, err:
2164
# 'err' is now the most recent error
2165
if sock is not None:
1369
2170
def dereference_path(path):
1370
2171
"""Determine the real path to a file.
1383
2184
def supports_mapi():
1384
2185
"""Return True if we can use MAPI to launch a mail client."""
1385
2186
return sys.platform == "win32"
2189
def resource_string(package, resource_name):
2190
"""Load a resource from a package and return it as a string.
2192
Note: Only packages that start with bzrlib are currently supported.
2194
This is designed to be a lightweight implementation of resource
2195
loading in a way which is API compatible with the same API from
2197
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2198
If and when pkg_resources becomes a standard library, this routine
2201
# Check package name is within bzrlib
2202
if package == "bzrlib":
2203
resource_relpath = resource_name
2204
elif package.startswith("bzrlib."):
2205
package = package[len("bzrlib."):].replace('.', os.sep)
2206
resource_relpath = pathjoin(package, resource_name)
2208
raise errors.BzrError('resource package %s not in bzrlib' % package)
2210
# Map the resource to a file and read its contents
2211
base = dirname(bzrlib.__file__)
2212
if getattr(sys, 'frozen', None): # bzr.exe
2213
base = abspath(pathjoin(base, '..', '..'))
2214
f = file(pathjoin(base, resource_relpath), "rU")
2220
def file_kind_from_stat_mode_thunk(mode):
2221
global file_kind_from_stat_mode
2222
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2224
from bzrlib._readdir_pyx import UTF8DirReader
2225
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2226
except ImportError, e:
2227
# This is one time where we won't warn that an extension failed to
2228
# load. The extension is never available on Windows anyway.
2229
from bzrlib._readdir_py import (
2230
_kind_from_mode as file_kind_from_stat_mode
2232
return file_kind_from_stat_mode(mode)
2233
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2235
def file_stat(f, _lstat=os.lstat):
2240
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2241
raise errors.NoSuchFile(f)
2244
def file_kind(f, _lstat=os.lstat):
2245
stat_value = file_stat(f, _lstat)
2246
return file_kind_from_stat_mode(stat_value.st_mode)
2248
def until_no_eintr(f, *a, **kw):
2249
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2251
WARNING: you must be certain that it is safe to retry the call repeatedly
2252
if EINTR does occur. This is typically only true for low-level operations
2253
like os.read. If in any doubt, don't use this.
2255
Keep in mind that this is not a complete solution to EINTR. There is
2256
probably code in the Python standard library and other dependencies that
2257
may encounter EINTR if a signal arrives (and there is signal handler for
2258
that signal). So this function can reduce the impact for IO that bzrlib
2259
directly controls, but it is not a complete solution.
2261
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2265
except (IOError, OSError), e:
2266
if e.errno == errno.EINTR:
2271
@deprecated_function(deprecated_in((2, 2, 0)))
2272
def re_compile_checked(re_string, flags=0, where=""):
2273
"""Return a compiled re, or raise a sensible error.
2275
This should only be used when compiling user-supplied REs.
2277
:param re_string: Text form of regular expression.
2278
:param flags: eg re.IGNORECASE
2279
:param where: Message explaining to the user the context where
2280
it occurred, eg 'log search filter'.
2282
# from https://bugs.launchpad.net/bzr/+bug/251352
2284
re_obj = re.compile(re_string, flags)
2287
except errors.InvalidPattern, e:
2289
where = ' in ' + where
2290
# despite the name 'error' is a type
2291
raise errors.BzrCommandError('Invalid regular expression%s: %s'
2295
if sys.platform == "win32":
2298
return msvcrt.getch()
2303
fd = sys.stdin.fileno()
2304
settings = termios.tcgetattr(fd)
2307
ch = sys.stdin.read(1)
2309
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2312
if sys.platform.startswith('linux'):
2313
def _local_concurrency():
2315
return os.sysconf('SC_NPROCESSORS_ONLN')
2316
except (ValueError, OSError, AttributeError):
2318
elif sys.platform == 'darwin':
2319
def _local_concurrency():
2320
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2321
stdout=subprocess.PIPE).communicate()[0]
2322
elif "bsd" in sys.platform:
2323
def _local_concurrency():
2324
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2325
stdout=subprocess.PIPE).communicate()[0]
2326
elif sys.platform == 'sunos5':
2327
def _local_concurrency():
2328
return subprocess.Popen(['psrinfo', '-p',],
2329
stdout=subprocess.PIPE).communicate()[0]
2330
elif sys.platform == "win32":
2331
def _local_concurrency():
2332
# This appears to return the number of cores.
2333
return os.environ.get('NUMBER_OF_PROCESSORS')
2335
def _local_concurrency():
2340
_cached_local_concurrency = None
2342
def local_concurrency(use_cache=True):
2343
"""Return how many processes can be run concurrently.
2345
Rely on platform specific implementations and default to 1 (one) if
2346
anything goes wrong.
2348
global _cached_local_concurrency
2350
if _cached_local_concurrency is not None and use_cache:
2351
return _cached_local_concurrency
2353
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2354
if concurrency is None:
2356
import multiprocessing
2357
concurrency = multiprocessing.cpu_count()
2358
except (ImportError, NotImplementedError):
2359
# multiprocessing is only available on Python >= 2.6
2360
# and multiprocessing.cpu_count() isn't implemented on all
2363
concurrency = _local_concurrency()
2364
except (OSError, IOError):
2367
concurrency = int(concurrency)
2368
except (TypeError, ValueError):
2371
_cached_concurrency = concurrency
2375
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2376
"""A stream writer that doesn't decode str arguments."""
2378
def __init__(self, encode, stream, errors='strict'):
2379
codecs.StreamWriter.__init__(self, stream, errors)
2380
self.encode = encode
2382
def write(self, object):
2383
if type(object) is str:
2384
self.stream.write(object)
2386
data, _ = self.encode(object, self.errors)
2387
self.stream.write(data)
2389
if sys.platform == 'win32':
2390
def open_file(filename, mode='r', bufsize=-1):
2391
"""This function is used to override the ``open`` builtin.
2393
But it uses O_NOINHERIT flag so the file handle is not inherited by
2394
child processes. Deleting or renaming a closed file opened with this
2395
function is not blocking child processes.
2397
writing = 'w' in mode
2398
appending = 'a' in mode
2399
updating = '+' in mode
2400
binary = 'b' in mode
2403
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2404
# for flags for each modes.
2414
flags |= os.O_WRONLY
2415
flags |= os.O_CREAT | os.O_TRUNC
2420
flags |= os.O_WRONLY
2421
flags |= os.O_CREAT | os.O_APPEND
2426
flags |= os.O_RDONLY
2428
return os.fdopen(os.open(filename, flags), mode, bufsize)
2433
def available_backup_name(base, exists):
2434
"""Find a non-existing backup file name.
2436
This will *not* create anything, this only return a 'free' entry. This
2437
should be used for checking names in a directory below a locked
2438
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2439
Leap) and generally discouraged.
2441
:param base: The base name.
2443
:param exists: A callable returning True if the path parameter exists.
2446
name = "%s.~%d~" % (base, counter)
2449
name = "%s.~%d~" % (base, counter)
2453
def set_fd_cloexec(fd):
2454
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2455
support for this is not available.
2459
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2460
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2461
except (ImportError, AttributeError):
2462
# Either the fcntl module or specific constants are not present
2466
def find_executable_on_path(name):
2467
"""Finds an executable on the PATH.
2469
On Windows, this will try to append each extension in the PATHEXT
2470
environment variable to the name, if it cannot be found with the name
2473
:param name: The base name of the executable.
2474
:return: The path to the executable found or None.
2476
if sys.platform == 'win32':
2477
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2478
exts = [ext.lower() for ext in exts]
2479
base, ext = os.path.splitext(name)
2481
if ext.lower() not in exts:
2487
path = os.environ.get('PATH')
2488
if path is not None:
2489
path = path.split(os.pathsep)
2492
f = os.path.join(d, name) + ext
2493
if os.access(f, os.X_OK):
2495
if sys.platform == 'win32':
2496
app_path = win32utils.get_app_path(name)
2497
if app_path != name:
2502
def _posix_is_local_pid_dead(pid):
2503
"""True if pid doesn't correspond to live process on this machine"""
2505
# Special meaning of unix kill: just check if it's there.
2508
if e.errno == errno.ESRCH:
2509
# On this machine, and really not found: as sure as we can be
2512
elif e.errno == errno.EPERM:
2513
# exists, though not ours
2516
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2517
# Don't really know.
2520
# Exists and our process: not dead.
2523
if sys.platform == "win32":
2524
is_local_pid_dead = win32utils.is_local_pid_dead
2526
is_local_pid_dead = _posix_is_local_pid_dead
2529
def fdatasync(fileno):
2530
"""Flush file contents to disk if possible.
2532
:param fileno: Integer OS file handle.
2533
:raises TransportNotPossible: If flushing to disk is not possible.
2535
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2540
def ensure_empty_directory_exists(path, exception_class):
2541
"""Make sure a local directory exists and is empty.
2543
If it does not exist, it is created. If it exists and is not empty, an
2544
instance of exception_class is raised.
2549
if e.errno != errno.EEXIST:
2551
if os.listdir(path) != []:
2552
raise exception_class(path)
2555
def is_environment_error(evalue):
2556
"""True if exception instance is due to a process environment issue
2558
This includes OSError and IOError, but also other errors that come from
2559
the operating system or core libraries but are not subclasses of those.
2561
if isinstance(evalue, (EnvironmentError, select.error)):
2563
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
