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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
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S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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# 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 tempfile import (
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from bzrlib import (
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from bzrlib.symbol_versioning import (
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# sha and md5 modules are deprecated in python2.6 but hashlib is available as
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if sys.version_info < (2, 5):
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from bzrlib import symbol_versioning
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# Cross platform wall-clock time functionality with decent resolution.
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# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
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# only has a resolution of ~15ms. Note that ``time.clock()`` is not
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# synchronized with ``time.time()``, this is only meant to be used to find
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# delta times by subtracting from another call to this function.
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timer_func = time.time
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if sys.platform == 'win32':
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timer_func = time.clock
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# On win32, O_BINARY is used to indicate the file should
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# be opened in binary mode, rather than text mode.
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# On other platforms, O_BINARY doesn't exist, because
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# they always open in binary mode, so it is okay to
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# OR with 0 on those platforms.
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# O_NOINHERIT and O_TEXT exists only on win32 too.
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# OR with 0 on those platforms
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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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# /path => C:/path
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path = unicode(path)
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# check for absolute path
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drive = ntpath.splitdrive(path)[0]
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drive = _nt_splitdrive(path)[0]
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if drive == '' and path[:2] not in('//','\\\\'):
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cwd = os.getcwdu()
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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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cwd = _nt_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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return _win32_fixdrive(_nt_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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# Real _nt_realpath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
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def _win32_pathjoin(*args):
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return ntpath.join(*args).replace('\\', '/')
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return _nt_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(_nt_normpath(unicode(path)).replace('\\', '/'))
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def _win32_getcwd():
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_extension_load_failures = []
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def failed_to_load_extension(exception):
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"""Handle failing to load a binary extension.
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This should be called from the ImportError block guarding the attempt to
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import the native extension. If this function returns, the pure-Python
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implementation should be loaded instead::
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>>> import bzrlib._fictional_extension_pyx
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>>> except ImportError, e:
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>>> bzrlib.osutils.failed_to_load_extension(e)
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>>> import bzrlib._fictional_extension_py
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# NB: This docstring is just an example, not a doctest, because doctest
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# currently can't cope with the use of lazy imports in this namespace --
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# This currently doesn't report the failure at the time it occurs, because
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# they tend to happen very early in startup when we can't check config
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# files etc, and also we want to report all failures but not spam the user
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from bzrlib import trace
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exception_str = str(exception)
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if exception_str not in _extension_load_failures:
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trace.mutter("failed to load compiled extension: %s" % exception_str)
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_extension_load_failures.append(exception_str)
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def report_extension_load_failures():
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if not _extension_load_failures:
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from bzrlib.config import GlobalConfig
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if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
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# the warnings framework should by default show this only once
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from bzrlib.trace import warning
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"bzr: warning: some compiled extensions could not be loaded; "
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"see <https://answers.launchpad.net/bzr/+faq/703>")
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# we no longer show the specific missing extensions here, because it makes
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# the message too long and scary - see
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# https://bugs.launchpad.net/bzr/+bug/430529
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from bzrlib._chunks_to_lines_pyx import chunks_to_lines
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except ImportError, e:
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failed_to_load_extension(e)
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from bzrlib._chunks_to_lines_py import chunks_to_lines
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normalized_filename = _inaccessible_normalized_filename
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def set_signal_handler(signum, handler, restart_syscall=True):
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"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
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on platforms that support that.
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:param restart_syscall: if set, allow syscalls interrupted by a signal to
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automatically restart (by calling `signal.siginterrupt(signum,
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False)`). May be ignored if the feature is not available on this
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platform or Python version.
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siginterrupt = signal.siginterrupt
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# This python implementation doesn't provide signal support, hence no
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except AttributeError:
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# siginterrupt doesn't exist on this platform, or for this version
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siginterrupt = lambda signum, flag: None
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def sig_handler(*args):
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# Python resets the siginterrupt flag when a signal is
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# received. <http://bugs.python.org/issue8354>
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# As a workaround for some cases, set it back the way we want it.
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siginterrupt(signum, False)
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# Now run the handler function passed to set_signal_handler.
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sig_handler = handler
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old_handler = signal.signal(signum, sig_handler)
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siginterrupt(signum, False)
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default_terminal_width = 80
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"""The default terminal width for ttys.
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This is defined so that higher levels can share a common fallback value when
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terminal_width() returns None.
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# Keep some state so that terminal_width can detect if _terminal_size has
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# returned a different size since the process started. See docstring and
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# comments of terminal_width for details.
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# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
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_terminal_size_state = 'no_data'
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_first_terminal_size = None
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def terminal_width():
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"""Return terminal width.
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None is returned if the width can't established precisely.
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- if BZR_COLUMNS is set, returns its value
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- if there is no controlling terminal, returns None
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- query the OS, if the queried size has changed since the last query,
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- if COLUMNS is set, returns its value,
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- if the OS has a value (even though it's never changed), return its value.
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From there, we need to query the OS to get the size of the controlling
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On Unices we query the OS by:
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- get termios.TIOCGWINSZ
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- if an error occurs or a negative value is obtained, returns None
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On Windows we query the OS by:
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- win32utils.get_console_size() decides,
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- returns None on error (provided default value)
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# Note to implementors: if changing the rules for determining the width,
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# make sure you've considered the behaviour in these cases:
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# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
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# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
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# - (add more interesting cases here, if you find any)
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# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
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# but we don't want to register a signal handler because it is impossible
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# to do so without risking EINTR errors in Python <= 2.6.5 (see
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# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
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# time so we can notice if the reported size has changed, which should have
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# If BZR_COLUMNS is set, take it, user is always right
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return int(os.environ['BZR_COLUMNS'])
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except (KeyError, ValueError):
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isatty = getattr(sys.stdout, 'isatty', None)
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if isatty is None or not isatty():
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# Don't guess, setting BZR_COLUMNS is the recommended way to override.
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width, height = os_size = _terminal_size(None, None)
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global _first_terminal_size, _terminal_size_state
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if _terminal_size_state == 'no_data':
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_first_terminal_size = os_size
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_terminal_size_state = 'unchanged'
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elif (_terminal_size_state == 'unchanged' and
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_first_terminal_size != os_size):
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_terminal_size_state = 'changed'
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# If the OS claims to know how wide the terminal is, and this value has
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# ever changed, use that.
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if _terminal_size_state == 'changed':
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if width is not None and width > 0:
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# If COLUMNS is set, use it.
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return int(os.environ['COLUMNS'])
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except (KeyError, ValueError):
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# Finally, use an unchanged size from the OS, if we have one.
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if _terminal_size_state == 'unchanged':
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if width is not None and width > 0:
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# The width could not be determined.
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def _win32_terminal_size(width, height):
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width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
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return width, height
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def _ioctl_terminal_size(width, height):
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"""Return estimated terminal width."""
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if sys.platform == 'win32':
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return win32utils.get_console_size()[0]
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import struct, fcntl, termios
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s = struct.pack('HHHH', 0, 0, 0, 0)
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x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
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height, width = struct.unpack('HHHH', x)[0:2]
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except (IOError, AttributeError):
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width = struct.unpack('HHHH', x)[1]
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return width, height
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_terminal_size = None
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"""Returns the terminal size as (width, height).
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:param width: Default value for width.
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:param height: Default value for height.
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This is defined specifically for each OS and query the size of the controlling
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terminal. If any error occurs, the provided default values should be returned.
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if sys.platform == 'win32':
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_terminal_size = _win32_terminal_size
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_terminal_size = _ioctl_terminal_size
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width = int(os.environ['COLUMNS'])
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def supports_executable():
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return socket.gethostname().decode(get_user_encoding())
1990
# We must not read/write any more than 64k at a time from/to a socket so we
1991
# don't risk "no buffer space available" errors on some platforms. Windows in
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# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1994
MAX_SOCKET_CHUNK = 64 * 1024
1996
def read_bytes_from_socket(sock, report_activity=None,
1997
max_read_size=MAX_SOCKET_CHUNK):
1998
"""Read up to max_read_size of bytes from sock and notify of progress.
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Translates "Connection reset by peer" into file-like EOF (return an
2001
empty string rather than raise an error), and repeats the recv if
2002
interrupted by a signal.
2006
bytes = sock.recv(max_read_size)
2007
except socket.error, e:
2009
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2010
# The connection was closed by the other side. Callers expect
2011
# an empty string to signal end-of-stream.
2013
elif eno == errno.EINTR:
2014
# Retry the interrupted recv.
2018
if report_activity is not None:
2019
report_activity(len(bytes), 'read')
2023
def recv_all(socket, count):
1691
def recv_all(socket, bytes):
2024
1692
"""Receive an exact number of bytes.
2026
1694
Regular Socket.recv() may return less than the requested number of bytes,
2027
depending on what's in the OS buffer. MSG_WAITALL is not available
1695
dependning on what's in the OS buffer. MSG_WAITALL is not available
2028
1696
on all platforms, but this should work everywhere. This will return
2029
1697
less than the requested amount if the remote end closes.
2031
1699
This isn't optimized and is intended mostly for use in testing.
2034
while len(b) < count:
2035
new = read_bytes_from_socket(socket, None, count - len(b))
1702
while len(b) < bytes:
1703
new = until_no_eintr(socket.recv, bytes - len(b))
2042
def send_all(sock, bytes, report_activity=None):
1710
def send_all(socket, bytes, report_activity=None):
2043
1711
"""Send all bytes on a socket.
2045
Breaks large blocks in smaller chunks to avoid buffering limitations on
2046
some platforms, and catches EINTR which may be thrown if the send is
2047
interrupted by a signal.
2049
This is preferred to socket.sendall(), because it avoids portability bugs
2050
and provides activity reporting.
1713
Regular socket.sendall() can give socket error 10053 on Windows. This
1714
implementation sends no more than 64k at a time, which avoids this problem.
2052
1716
:param report_activity: Call this as bytes are read, see
2053
1717
Transport._report_activity
2056
byte_count = len(bytes)
2057
while sent_total < byte_count:
2059
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2060
except socket.error, e:
2061
if e.args[0] != errno.EINTR:
2065
report_activity(sent, 'write')
1720
for pos in xrange(0, len(bytes), chunk_size):
1721
block = bytes[pos:pos+chunk_size]
1722
if report_activity is not None:
1723
report_activity(len(block), 'write')
1724
until_no_eintr(socket.sendall, block)
2068
1727
def dereference_path(path):
2262
1901
_cached_concurrency = concurrency
2263
1902
return concurrency
2266
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2267
"""A stream writer that doesn't decode str arguments."""
2269
def __init__(self, encode, stream, errors='strict'):
2270
codecs.StreamWriter.__init__(self, stream, errors)
2271
self.encode = encode
2273
def write(self, object):
2274
if type(object) is str:
2275
self.stream.write(object)
2277
data, _ = self.encode(object, self.errors)
2278
self.stream.write(data)
2280
if sys.platform == 'win32':
2281
def open_file(filename, mode='r', bufsize=-1):
2282
"""This function is used to override the ``open`` builtin.
2284
But it uses O_NOINHERIT flag so the file handle is not inherited by
2285
child processes. Deleting or renaming a closed file opened with this
2286
function is not blocking child processes.
2288
writing = 'w' in mode
2289
appending = 'a' in mode
2290
updating = '+' in mode
2291
binary = 'b' in mode
2294
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2295
# for flags for each modes.
2305
flags |= os.O_WRONLY
2306
flags |= os.O_CREAT | os.O_TRUNC
2311
flags |= os.O_WRONLY
2312
flags |= os.O_CREAT | os.O_APPEND
2317
flags |= os.O_RDONLY
2319
return os.fdopen(os.open(filename, flags), mode, bufsize)
2324
def getuser_unicode():
2325
"""Return the username as unicode.
2328
user_encoding = get_user_encoding()
2329
username = getpass.getuser().decode(user_encoding)
2330
except UnicodeDecodeError:
2331
raise errors.BzrError("Can't decode username as %s." % \
added
removed
bzrlib/osutils.py
