25
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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.symbol_versioning import (
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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 = 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
123
# probably no point warning about it.
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# <https://bugs.launchpad.net/bzr/+bug/606537>
125
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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rename_func(tmp_name, new)
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if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
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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)
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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
336
raise errors.BadFilenameEncoding(val, _fs_enc)
339
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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running python.exe under cmd.exe return capital C:\\
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running win32 python inside a cygwin shell returns lowercase c:\\
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drive, path = _nt_splitdrive(path)
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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 _nt_abspath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
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# 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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# /path => C:/path
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path = unicode(path)
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# check for absolute path
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drive = _nt_splitdrive(path)[0]
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drive = ntpath.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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387
# and this is incorrect
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if path[:1] in ('/','\\'):
336
cwd = _nt_splitdrive(cwd)[0]
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cwd = ntpath.splitdrive(cwd)[0]
338
391
path = cwd + '\\' + path
339
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
392
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
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def _win32_realpath(path):
343
# Real _nt_realpath doesn't have a problem with a unicode cwd
344
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
396
# Real ntpath.realpath doesn't have a problem with a unicode cwd
397
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
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400
def _win32_pathjoin(*args):
348
return _nt_join(*args).replace('\\', '/')
401
return ntpath.join(*args).replace('\\', '/')
351
404
def _win32_normpath(path):
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
405
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
355
408
def _win32_getcwd():
405
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abspath = _posix_abspath
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realpath = _posix_realpath
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pathjoin = os.path.join
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normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
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normpath = _posix_normpath
444
path_from_environ = _posix_path_from_environ
445
getuser_unicode = _posix_getuser_unicode
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getcwd = os.getcwdu
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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
415
# These were already imported into local scope
452
# 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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input_encoding = getattr(sys.stdin, 'encoding', None)
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if not input_encoding:
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output_encoding = get_user_encoding()
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
536
mutter('encoding stdout as osutils.get_user_encoding() %r',
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output_encoding = input_encoding
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
541
mutter('encoding stdout as sys.stdin encoding %r',
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
545
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()
490
mutter('cp0 is invalid encoding.'
550
mutter('cp0 is invalid encoding.'
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' encoding stdout as osutils.get_user_encoding() %r',
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1308
# but for now, we haven't optimized...
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return [canonical_relpath(base, p) for p in paths]
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def decode_filename(filename):
1313
"""Decode the filename using the filesystem encoding
1315
If it is unicode, it is returned.
1316
Otherwise it is decoded from the the filesystem's encoding. If decoding
1317
fails, a errors.BadFilenameEncoding exception is raised.
1319
if type(filename) is unicode:
1322
return filename.decode(_fs_enc)
1323
except UnicodeDecodeError:
1324
raise errors.BadFilenameEncoding(filename, _fs_enc)
1253
1327
def safe_unicode(unicode_or_utf8_string):
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1328
"""Coerce unicode_or_utf8_string into unicode.
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1507
- if BZR_COLUMNS is set, returns its value
1428
1508
- 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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1511
- if COLUMNS is set, returns its value,
1512
- if the OS has a value (even though it's never changed), return its value.
1431
1514
From there, we need to query the OS to get the size of the controlling
1517
On Unices we query the OS by:
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1518
- get termios.TIOCGWINSZ
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1519
- if an error occurs or a negative value is obtained, returns None
1521
On Windows we query the OS by:
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1522
- win32utils.get_console_size() decides,
1441
1523
- returns None on error (provided default value)
1525
# Note to implementors: if changing the rules for determining the width,
1526
# make sure you've considered the behaviour in these cases:
1527
# - 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
1530
# - (add more interesting cases here, if you find any)
1531
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1532
# but we don't want to register a signal handler because it is impossible
1533
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1534
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1535
# time so we can notice if the reported size has changed, which should have
1444
1538
# If BZR_COLUMNS is set, take it, user is always right
1539
# Except if they specified 0 in which case, impose no limit here
1446
return int(os.environ['BZR_COLUMNS'])
1541
width = int(os.environ['BZR_COLUMNS'])
1447
1542
except (KeyError, ValueError):
1544
if width is not None:
1450
1550
isatty = getattr(sys.stdout, 'isatty', None)
1451
if isatty is None or not isatty():
1551
if isatty is None or not isatty():
1452
1552
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1455
# If COLUMNS is set, take it, the terminal knows better (even inside a
1456
# given terminal, the application can decide to set COLUMNS to a lower
1457
# value (splitted screen) or a bigger value (scroll bars))
1556
width, height = os_size = _terminal_size(None, None)
1557
global _first_terminal_size, _terminal_size_state
1558
if _terminal_size_state == 'no_data':
1559
_first_terminal_size = os_size
1560
_terminal_size_state = 'unchanged'
1561
elif (_terminal_size_state == 'unchanged' and
1562
_first_terminal_size != os_size):
1563
_terminal_size_state = 'changed'
1565
# If the OS claims to know how wide the terminal is, and this value has
1566
# ever changed, use that.
1567
if _terminal_size_state == 'changed':
1568
if width is not None and width > 0:
1571
# If COLUMNS is set, use it.
1459
1573
return int(os.environ['COLUMNS'])
1460
1574
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1577
# Finally, use an unchanged size from the OS, if we have one.
1578
if _terminal_size_state == 'unchanged':
1579
if width is not None and width > 0:
1582
# The width could not be determined.
1471
1586
def _win32_terminal_size(width, height):
1498
1613
_terminal_size = _ioctl_terminal_size
1501
def _terminal_size_changed(signum, frame):
1502
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1503
width, height = _terminal_size(None, None)
1504
if width is not None:
1505
os.environ['COLUMNS'] = str(width)
1508
_registered_sigwinch = False
1509
def watch_sigwinch():
1510
"""Register for SIGWINCH, once and only once.
1512
Do nothing if the signal module is not available.
1514
global _registered_sigwinch
1515
if not _registered_sigwinch:
1518
if getattr(signal, "SIGWINCH", None) is not None:
1519
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1521
# python doesn't provide signal support, nothing we can do about it
1523
_registered_sigwinch = True
1526
1616
def supports_executable():
1527
1617
return sys.platform != "win32"
1959
2050
return user_encoding
2053
def get_diff_header_encoding():
2054
return get_terminal_encoding()
2057
_message_encoding = None
2060
def get_message_encoding():
2061
"""Return the encoding used for messages
2063
While the message encoding is a general setting it should usually only be
2064
needed for decoding system error strings such as from OSError instances.
2066
global _message_encoding
2067
if _message_encoding is None:
2068
if os.name == "posix":
2070
# This is a process-global setting that can change, but should in
2071
# general just get set once at process startup then be constant.
2072
_message_encoding = locale.getlocale(locale.LC_MESSAGES)[1]
2074
# On windows want the result of GetACP() which this boils down to.
2075
_message_encoding = get_user_encoding()
2076
return _message_encoding or "ascii"
1962
2079
def get_host_name():
1963
2080
"""Return the current unicode host name.
2051
2176
report_activity(sent, 'write')
2179
def connect_socket(address):
2180
# Slight variation of the socket.create_connection() function (provided by
2181
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2182
# provide it for previous python versions. Also, we don't use the timeout
2183
# parameter (provided by the python implementation) so we don't implement
2185
err = socket.error('getaddrinfo returns an empty list')
2186
host, port = address
2187
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2188
af, socktype, proto, canonname, sa = res
2191
sock = socket.socket(af, socktype, proto)
2195
except socket.error, err:
2196
# 'err' is now the most recent error
2197
if sock is not None:
2054
2202
def dereference_path(path):
2055
2203
"""Determine the real path to a file.
2114
2264
return file_kind_from_stat_mode(mode)
2115
2265
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2267
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2121
2271
except OSError, e:
2122
2272
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2273
raise errors.NoSuchFile(f)
2276
def file_kind(f, _lstat=os.lstat):
2277
stat_value = file_stat(f, _lstat)
2278
return file_kind_from_stat_mode(stat_value.st_mode)
2127
2280
def until_no_eintr(f, *a, **kw):
2128
2281
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2283
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2284
if EINTR does occur. This is typically only true for low-level operations
2132
2285
like os.read. If in any doubt, don't use this.
2187
2341
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2344
if sys.platform.startswith('linux'):
2192
2345
def _local_concurrency():
2194
prefix = 'processor'
2195
for line in file('/proc/cpuinfo', 'rb'):
2196
if line.startswith(prefix):
2197
concurrency = int(line[line.find(':')+1:]) + 1
2347
return os.sysconf('SC_NPROCESSORS_ONLN')
2348
except (ValueError, OSError, AttributeError):
2199
2350
elif sys.platform == 'darwin':
2200
2351
def _local_concurrency():
2201
2352
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2353
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2354
elif "bsd" in sys.platform:
2204
2355
def _local_concurrency():
2205
2356
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2357
stdout=subprocess.PIPE).communicate()[0]
2234
2385
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2235
2386
if concurrency is None:
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2388
import multiprocessing
2389
concurrency = multiprocessing.cpu_count()
2390
except (ImportError, NotImplementedError):
2391
# multiprocessing is only available on Python >= 2.6
2392
# and multiprocessing.cpu_count() isn't implemented on all
2395
concurrency = _local_concurrency()
2396
except (OSError, IOError):
2241
2399
concurrency = int(concurrency)
2242
2400
except (TypeError, ValueError):
2302
2460
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2462
open_file = open
2465
def available_backup_name(base, exists):
2466
"""Find a non-existing backup file name.
2468
This will *not* create anything, this only return a 'free' entry. This
2469
should be used for checking names in a directory below a locked
2470
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2471
Leap) and generally discouraged.
2473
:param base: The base name.
2475
:param exists: A callable returning True if the path parameter exists.
2478
name = "%s.~%d~" % (base, counter)
2481
name = "%s.~%d~" % (base, counter)
2485
def set_fd_cloexec(fd):
2486
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2487
support for this is not available.
2491
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2492
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2493
except (ImportError, AttributeError):
2494
# Either the fcntl module or specific constants are not present
2498
def find_executable_on_path(name):
2499
"""Finds an executable on the PATH.
2501
On Windows, this will try to append each extension in the PATHEXT
2502
environment variable to the name, if it cannot be found with the name
2505
:param name: The base name of the executable.
2506
:return: The path to the executable found or None.
2508
path = os.environ.get('PATH')
2511
path = path.split(os.pathsep)
2512
if sys.platform == 'win32':
2513
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2514
exts = [ext.lower() for ext in exts]
2515
base, ext = os.path.splitext(name)
2517
if ext.lower() not in exts:
2525
f = os.path.join(d, name) + ext
2526
if os.access(f, os.X_OK):
2531
def _posix_is_local_pid_dead(pid):
2532
"""True if pid doesn't correspond to live process on this machine"""
2534
# Special meaning of unix kill: just check if it's there.
2537
if e.errno == errno.ESRCH:
2538
# On this machine, and really not found: as sure as we can be
2541
elif e.errno == errno.EPERM:
2542
# exists, though not ours
2545
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2546
# Don't really know.
2549
# Exists and our process: not dead.
2552
if sys.platform == "win32":
2553
is_local_pid_dead = win32utils.is_local_pid_dead
2555
is_local_pid_dead = _posix_is_local_pid_dead
2558
def fdatasync(fileno):
2559
"""Flush file contents to disk if possible.
2561
:param fileno: Integer OS file handle.
2562
:raises TransportNotPossible: If flushing to disk is not possible.
2564
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2569
def ensure_empty_directory_exists(path, exception_class):
2570
"""Make sure a local directory exists and is empty.
2572
If it does not exist, it is created. If it exists and is not empty, an
2573
instance of exception_class is raised.
2578
if e.errno != errno.EEXIST:
2580
if os.listdir(path) != []:
2581
raise exception_class(path)
2584
def is_environment_error(evalue):
2585
"""True if exception instance is due to a process environment issue
2587
This includes OSError and IOError, but also other errors that come from
2588
the operating system or core libraries but are not subclasses of those.
2590
if isinstance(evalue, (EnvironmentError, select.error)):
2592
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):