27
25
from bzrlib.lazy_import import lazy_import
28
26
lazy_import(globals(), """
29
27
from datetime import datetime
29
from ntpath import (abspath as _nt_abspath,
31
normpath as _nt_normpath,
32
realpath as _nt_realpath,
33
splitdrive as _nt_splitdrive,
35
# We need to import both shutil and rmtree as we export the later on posix
36
# and need the former on windows
38
from shutil import rmtree
41
# We need to import both tempfile and mkdtemp as we export the later on posix
42
# and need the former on windows
44
from tempfile import mkdtemp
43
from tempfile import (
47
48
from bzrlib import (
54
from bzrlib.i18n import gettext
57
56
from bzrlib.symbol_versioning import (
59
57
deprecated_function,
62
warn as warn_deprecated,
61
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
63
if sys.version_info < (2, 5):
64
import md5 as _mod_md5
66
import sha as _mod_sha
72
from bzrlib import symbol_versioning, _fs_enc
76
from bzrlib import symbol_versioning
75
79
# Cross platform wall-clock time functionality with decent resolution.
106
110
mod = os.lstat(filename).st_mode
107
111
if not stat.S_ISLNK(mod):
108
112
mod = mod & 0777555
109
chmod_if_possible(filename, mod)
113
os.chmod(filename, mod)
112
116
def make_writable(filename):
113
117
mod = os.lstat(filename).st_mode
114
118
if not stat.S_ISLNK(mod):
116
chmod_if_possible(filename, mod)
119
def chmod_if_possible(filename, mode):
120
# Set file mode if that can be safely done.
121
# Sometimes even on unix the filesystem won't allow it - see
122
# https://bugs.launchpad.net/bzr/+bug/606537
124
# It is probably faster to just do the chmod, rather than
125
# doing a stat, and then trying to compare
126
os.chmod(filename, mode)
127
except (IOError, OSError),e:
128
# Permission/access denied seems to commonly happen on smbfs; there's
129
# probably no point warning about it.
130
# <https://bugs.launchpad.net/bzr/+bug/606537>
131
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
132
trace.mutter("ignore error on chmod of %r: %r" % (
120
os.chmod(filename, mod)
138
123
def minimum_path_selection(paths):
290
275
rename_func(tmp_name, new)
291
276
if failure_exc is not None:
293
raise failure_exc[0], failure_exc[1], failure_exc[2]
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
298
280
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
299
281
# choke on a Unicode string containing a relative path if
300
282
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
302
285
def _posix_abspath(path):
303
286
# jam 20060426 rather than encoding to fsencoding
304
287
# copy posixpath.abspath, but use os.getcwdu instead
305
288
if not posixpath.isabs(path):
306
289
path = posixpath.join(getcwd(), path)
307
return _posix_normpath(path)
290
return posixpath.normpath(path)
310
293
def _posix_realpath(path):
311
294
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
314
def _posix_normpath(path):
315
path = posixpath.normpath(path)
316
# Bug 861008: posixpath.normpath() returns a path normalized according to
317
# the POSIX standard, which stipulates (for compatibility reasons) that two
318
# leading slashes must not be simplified to one, and only if there are 3 or
319
# more should they be simplified as one. So we treat the leading 2 slashes
320
# as a special case here by simply removing the first slash, as we consider
321
# that breaking POSIX compatibility for this obscure feature is acceptable.
322
# This is not a paranoid precaution, as we notably get paths like this when
323
# the repo is hosted at the root of the filesystem, i.e. in "/".
324
if path.startswith('//'):
329
def _posix_path_from_environ(key):
330
"""Get unicode path from `key` in environment or None if not present
332
Note that posix systems use arbitrary byte strings for filesystem objects,
333
so a path that raises BadFilenameEncoding here may still be accessible.
335
val = os.environ.get(key, None)
339
return val.decode(_fs_enc)
340
except UnicodeDecodeError:
341
# 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():
346
"""Get the home directory of the current user as a unicode path"""
347
path = posixpath.expanduser("~")
349
return path.decode(_fs_enc)
350
except UnicodeDecodeError:
351
raise errors.BadFilenameEncoding(path, _fs_enc)
354
def _posix_getuser_unicode():
355
"""Get username from environment or password database as unicode"""
356
name = getpass.getuser()
357
user_encoding = get_user_encoding()
359
return name.decode(user_encoding)
360
except UnicodeDecodeError:
361
raise errors.BzrError("Encoding of username %r is unsupported by %s "
362
"application locale." % (name, user_encoding))
365
297
def _win32_fixdrive(path):
366
298
"""Force drive letters to be consistent.
394
326
# /path => C:/path
395
327
path = unicode(path)
396
328
# check for absolute path
397
drive = ntpath.splitdrive(path)[0]
329
drive = _nt_splitdrive(path)[0]
398
330
if drive == '' and path[:2] not in('//','\\\\'):
399
331
cwd = os.getcwdu()
400
332
# we cannot simply os.path.join cwd and path
401
333
# because os.path.join('C:','/path') produce '/path'
402
334
# and this is incorrect
403
335
if path[:1] in ('/','\\'):
404
cwd = ntpath.splitdrive(cwd)[0]
336
cwd = _nt_splitdrive(cwd)[0]
406
338
path = cwd + '\\' + path
407
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
339
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
410
342
def _win32_realpath(path):
411
# Real ntpath.realpath doesn't have a problem with a unicode cwd
412
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
343
# Real _nt_realpath doesn't have a problem with a unicode cwd
344
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
415
347
def _win32_pathjoin(*args):
416
return ntpath.join(*args).replace('\\', '/')
348
return _nt_join(*args).replace('\\', '/')
419
351
def _win32_normpath(path):
420
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
423
355
def _win32_getcwd():
389
def _wrapped_rename(old, new):
390
"""Rename a file or directory"""
393
except (IOError, OSError), e:
394
# this is eventually called by all rename-like functions, so should
396
raise _add_rename_error_details(e, old, new)
449
399
def _mac_getcwd():
450
400
return unicodedata.normalize('NFC', os.getcwdu())
453
def _rename_wrap_exception(rename_func):
454
"""Adds extra information to any exceptions that come from rename().
456
The exception has an updated message and 'old_filename' and 'new_filename'
460
def _rename_wrapper(old, new):
462
rename_func(old, new)
464
detailed_error = OSError(e.errno, e.strerror +
465
" [occurred when renaming '%s' to '%s']" %
467
detailed_error.old_filename = old
468
detailed_error.new_filename = new
471
return _rename_wrapper
473
# Default rename wraps os.rename()
474
rename = _rename_wrap_exception(os.rename)
476
403
# Default is to just use the python builtins, but these can be rebound on
477
404
# particular platforms.
478
405
abspath = _posix_abspath
479
406
realpath = _posix_realpath
480
407
pathjoin = os.path.join
481
normpath = _posix_normpath
482
path_from_environ = _posix_path_from_environ
483
_get_home_dir = _posix_get_home_dir
484
getuser_unicode = _posix_getuser_unicode
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
485
410
getcwd = os.getcwdu
486
411
dirname = os.path.dirname
487
412
basename = os.path.basename
488
413
split = os.path.split
489
414
splitext = os.path.splitext
490
# These were already lazily imported into local scope
415
# These were already imported into local scope
491
416
# mkdtemp = tempfile.mkdtemp
492
417
# rmtree = shutil.rmtree
500
419
MIN_ABS_PATHLENGTH = 1
571
477
input_encoding = getattr(sys.stdin, 'encoding', None)
572
478
if not input_encoding:
573
479
output_encoding = get_user_encoding()
575
mutter('encoding stdout as osutils.get_user_encoding() %r',
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
578
483
output_encoding = input_encoding
580
mutter('encoding stdout as sys.stdin encoding %r',
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
584
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
585
487
if output_encoding == 'cp0':
586
488
# invalid encoding (cp0 means 'no codepage' on Windows)
587
489
output_encoding = get_user_encoding()
589
mutter('cp0 is invalid encoding.'
490
mutter('cp0 is invalid encoding.'
590
491
' encoding stdout as osutils.get_user_encoding() %r',
981
882
"""Return size of given open file."""
982
return os.fstat(f.fileno())[stat.ST_SIZE]
985
# Alias os.urandom to support platforms (which?) without /dev/urandom and
986
# override if it doesn't work. Avoid checking on windows where there is
987
# significant initialisation cost that can be avoided for some bzr calls.
989
rand_bytes = os.urandom
991
if rand_bytes.__module__ != "nt":
883
return os.fstat(f.fileno())[ST_SIZE]
886
# Define rand_bytes based on platform.
888
# Python 2.4 and later have os.urandom,
889
# but it doesn't work on some arches
891
rand_bytes = os.urandom
892
except (NotImplementedError, AttributeError):
893
# If python doesn't have os.urandom, or it doesn't work,
894
# then try to first pull random data from /dev/urandom
994
except NotImplementedError:
896
rand_bytes = file('/dev/urandom', 'rb').read
897
# Otherwise, use this hack as a last resort
898
except (IOError, OSError):
995
899
# not well seeded, but better than nothing
996
900
def rand_bytes(n):
1543
1427
- if BZR_COLUMNS is set, returns its value
1544
1428
- if there is no controlling terminal, returns None
1545
- query the OS, if the queried size has changed since the last query,
1547
1429
- if COLUMNS is set, returns its value,
1548
- if the OS has a value (even though it's never changed), return its value.
1550
1431
From there, we need to query the OS to get the size of the controlling
1553
On Unices we query the OS by:
1554
1435
- get termios.TIOCGWINSZ
1555
1436
- if an error occurs or a negative value is obtained, returns None
1557
On Windows we query the OS by:
1558
1440
- win32utils.get_console_size() decides,
1559
1441
- returns None on error (provided default value)
1561
# Note to implementors: if changing the rules for determining the width,
1562
# make sure you've considered the behaviour in these cases:
1563
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1564
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1566
# - (add more interesting cases here, if you find any)
1567
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1568
# but we don't want to register a signal handler because it is impossible
1569
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1570
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1571
# time so we can notice if the reported size has changed, which should have
1574
1444
# If BZR_COLUMNS is set, take it, user is always right
1575
# Except if they specified 0 in which case, impose no limit here
1577
width = int(os.environ['BZR_COLUMNS'])
1446
return int(os.environ['BZR_COLUMNS'])
1578
1447
except (KeyError, ValueError):
1580
if width is not None:
1586
1450
isatty = getattr(sys.stdout, 'isatty', None)
1587
if isatty is None or not isatty():
1451
if isatty is None or not isatty():
1588
1452
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1592
width, height = os_size = _terminal_size(None, None)
1593
global _first_terminal_size, _terminal_size_state
1594
if _terminal_size_state == 'no_data':
1595
_first_terminal_size = os_size
1596
_terminal_size_state = 'unchanged'
1597
elif (_terminal_size_state == 'unchanged' and
1598
_first_terminal_size != os_size):
1599
_terminal_size_state = 'changed'
1601
# If the OS claims to know how wide the terminal is, and this value has
1602
# ever changed, use that.
1603
if _terminal_size_state == 'changed':
1604
if width is not None and width > 0:
1607
# If COLUMNS is set, use it.
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))
1609
1459
return int(os.environ['COLUMNS'])
1610
1460
except (KeyError, ValueError):
1613
# Finally, use an unchanged size from the OS, if we have one.
1614
if _terminal_size_state == 'unchanged':
1615
if width is not None and width > 0:
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1618
# The width could not be determined.
1622
1471
def _win32_terminal_size(width, height):
1649
1498
_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
1652
1526
def supports_executable():
1653
1527
return sys.platform != "win32"
2013
1886
_cached_user_encoding = None
2016
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
1889
def get_user_encoding(use_cache=True):
2017
1890
"""Find out what the preferred user encoding is.
2019
1892
This is generally the encoding that is used for command line parameters
2020
1893
and file contents. This may be different from the terminal encoding
2021
1894
or the filesystem encoding.
1896
:param use_cache: Enable cache for detected encoding.
1897
(This parameter is turned on by default,
1898
and required only for selftesting)
2023
1900
:return: A string defining the preferred user encoding
2025
1902
global _cached_user_encoding
2026
if deprecated_passed(use_cache):
2027
warn_deprecated("use_cache should only have been used for tests",
2028
DeprecationWarning, stacklevel=2)
2029
if _cached_user_encoding is not None:
1903
if _cached_user_encoding is not None and use_cache:
2030
1904
return _cached_user_encoding
2032
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2033
# Use the existing locale settings and call nl_langinfo directly
2034
# rather than going through getpreferredencoding. This avoids
2035
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2036
# possibility of the setlocale call throwing an error.
2037
user_encoding = locale.nl_langinfo(locale.CODESET)
1906
if sys.platform == 'darwin':
1907
# python locale.getpreferredencoding() always return
1908
# 'mac-roman' on darwin. That's a lie.
1909
sys.platform = 'posix'
1911
if os.environ.get('LANG', None) is None:
1912
# If LANG is not set, we end up with 'ascii', which is bad
1913
# ('mac-roman' is more than ascii), so we set a default which
1914
# will give us UTF-8 (which appears to work in all cases on
1915
# OSX). Users are still free to override LANG of course, as
1916
# long as it give us something meaningful. This work-around
1917
# *may* not be needed with python 3k and/or OSX 10.5, but will
1918
# work with them too -- vila 20080908
1919
os.environ['LANG'] = 'en_US.UTF-8'
1922
sys.platform = 'darwin'
2039
# GZ 2011-12-19: On windows could call GetACP directly instead.
2040
user_encoding = locale.getpreferredencoding(False)
2043
user_encoding = codecs.lookup(user_encoding).name
2045
if user_encoding not in ("", "cp0"):
1927
user_encoding = locale.getpreferredencoding()
1928
except locale.Error, e:
1929
sys.stderr.write('bzr: warning: %s\n'
1930
' Could not determine what text encoding to use.\n'
1931
' This error usually means your Python interpreter\n'
1932
' doesn\'t support the locale set by $LANG (%s)\n'
1933
" Continuing with ascii encoding.\n"
1934
% (e, os.environ.get('LANG')))
1935
user_encoding = 'ascii'
1937
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1938
# treat that as ASCII, and not support printing unicode characters to the
1941
# For python scripts run under vim, we get '', so also treat that as ASCII
1942
if user_encoding in (None, 'cp0', ''):
1943
user_encoding = 'ascii'
1947
codecs.lookup(user_encoding)
2046
1949
sys.stderr.write('bzr: warning:'
2047
1950
' unknown encoding %s.'
2048
1951
' Continuing with ascii encoding.\n'
2049
1952
% user_encoding
2051
user_encoding = 'ascii'
2053
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2054
if user_encoding == 'ascii':
2055
if sys.platform == 'darwin':
2056
# OSX is special-cased in Python to have a UTF-8 filesystem
2057
# encoding and previously had LANG set here if not present.
2058
user_encoding = 'utf-8'
2059
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2060
# for some other posix platforms as well.
2062
_cached_user_encoding = user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = user_encoding
2063
1959
return user_encoding
2066
def get_diff_header_encoding():
2067
return get_terminal_encoding()
2070
1962
def get_host_name():
2071
1963
"""Return the current unicode host name.
2158
2043
while sent_total < byte_count:
2160
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2161
except (socket.error, IOError), e:
2162
if e.args[0] in _end_of_stream_errors:
2163
raise errors.ConnectionReset(
2164
"Error trying to write to socket", e)
2046
except socket.error, e:
2165
2047
if e.args[0] != errno.EINTR:
2169
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2171
2050
sent_total += sent
2172
if report_activity is not None:
2173
report_activity(sent, 'write')
2176
def connect_socket(address):
2177
# Slight variation of the socket.create_connection() function (provided by
2178
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2179
# provide it for previous python versions. Also, we don't use the timeout
2180
# parameter (provided by the python implementation) so we don't implement
2182
err = socket.error('getaddrinfo returns an empty list')
2183
host, port = address
2184
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2185
af, socktype, proto, canonname, sa = res
2188
sock = socket.socket(af, socktype, proto)
2192
except socket.error, err:
2193
# 'err' is now the most recent error
2194
if sock is not None:
2051
report_activity(sent, 'write')
2199
2054
def dereference_path(path):
2261
2114
return file_kind_from_stat_mode(mode)
2262
2115
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2264
def file_stat(f, _lstat=os.lstat):
2118
def file_kind(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2268
2121
except OSError, e:
2269
2122
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2270
2123
raise errors.NoSuchFile(f)
2273
def file_kind(f, _lstat=os.lstat):
2274
stat_value = file_stat(f, _lstat)
2275
return file_kind_from_stat_mode(stat_value.st_mode)
2277
2127
def until_no_eintr(f, *a, **kw):
2278
2128
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2280
2130
WARNING: you must be certain that it is safe to retry the call repeatedly
2281
2131
if EINTR does occur. This is typically only true for low-level operations
2282
2132
like os.read. If in any doubt, don't use this.
2338
2187
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2341
if sys.platform.startswith('linux'):
2191
if sys.platform == 'linux2':
2342
2192
def _local_concurrency():
2344
return os.sysconf('SC_NPROCESSORS_ONLN')
2345
except (ValueError, OSError, AttributeError):
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
2199
elif sys.platform == 'darwin':
2348
2200
def _local_concurrency():
2349
2201
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2350
2202
stdout=subprocess.PIPE).communicate()[0]
2351
elif "bsd" in sys.platform:
2203
elif sys.platform[0:7] == 'freebsd':
2352
2204
def _local_concurrency():
2353
2205
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2354
2206
stdout=subprocess.PIPE).communicate()[0]
2457
2302
return os.fdopen(os.open(filename, flags), mode, bufsize)
2459
2304
open_file = open
2462
def available_backup_name(base, exists):
2463
"""Find a non-existing backup file name.
2465
This will *not* create anything, this only return a 'free' entry. This
2466
should be used for checking names in a directory below a locked
2467
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2468
Leap) and generally discouraged.
2470
:param base: The base name.
2472
:param exists: A callable returning True if the path parameter exists.
2475
name = "%s.~%d~" % (base, counter)
2478
name = "%s.~%d~" % (base, counter)
2482
def set_fd_cloexec(fd):
2483
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2484
support for this is not available.
2488
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2489
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2490
except (ImportError, AttributeError):
2491
# Either the fcntl module or specific constants are not present
2495
def find_executable_on_path(name):
2496
"""Finds an executable on the PATH.
2498
On Windows, this will try to append each extension in the PATHEXT
2499
environment variable to the name, if it cannot be found with the name
2502
:param name: The base name of the executable.
2503
:return: The path to the executable found or None.
2505
if sys.platform == 'win32':
2506
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2507
exts = [ext.lower() for ext in exts]
2508
base, ext = os.path.splitext(name)
2510
if ext.lower() not in exts:
2516
path = os.environ.get('PATH')
2517
if path is not None:
2518
path = path.split(os.pathsep)
2521
f = os.path.join(d, name) + ext
2522
if os.access(f, os.X_OK):
2524
if sys.platform == 'win32':
2525
app_path = win32utils.get_app_path(name)
2526
if app_path != name:
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
2557
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2558
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2559
if getattr(errno, name, None) is not None]
2562
def fdatasync(fileno):
2563
"""Flush file contents to disk if possible.
2565
:param fileno: Integer OS file handle.
2566
:raises TransportNotPossible: If flushing to disk is not possible.
2568
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2573
# See bug #1075108, on some platforms fdatasync exists, but can
2574
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2575
# and reduce the chance of corruption-on-powerloss situations. It
2576
# is not a mandatory call, so it is ok to suppress failures.
2577
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2578
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2582
def ensure_empty_directory_exists(path, exception_class):
2583
"""Make sure a local directory exists and is empty.
2585
If it does not exist, it is created. If it exists and is not empty, an
2586
instance of exception_class is raised.
2591
if e.errno != errno.EEXIST:
2593
if os.listdir(path) != []:
2594
raise exception_class(path)
2597
def is_environment_error(evalue):
2598
"""True if exception instance is due to a process environment issue
2600
This includes OSError and IOError, but also other errors that come from
2601
the operating system or core libraries but are not subclasses of those.
2603
if isinstance(evalue, (EnvironmentError, select.error)):
2605
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
