14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
from __future__ import absolute_import
20
from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
27
from .lazy_import import lazy_import
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 (
52
from breezy.i18n import gettext
56
from bzrlib.symbol_versioning import (
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
76
from bzrlib import symbol_versioning
73
79
# Cross platform wall-clock time functionality with decent resolution.
90
96
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
93
class UnsupportedTimezoneFormat(errors.BzrError):
95
_fmt = ('Unsupported timezone format "%(timezone)s", '
96
'options are "utc", "original", "local".')
98
def __init__(self, timezone):
99
self.timezone = timezone
102
99
def get_unicode_argv():
106
101
user_encoding = get_user_encoding()
107
102
return [a.decode(user_encoding) for a in sys.argv[1:]]
108
103
except UnicodeDecodeError:
109
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
110
"application locale.").format(a, user_encoding))
104
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
113
108
def make_readonly(filename):
114
109
"""Make a filename read-only."""
115
110
mod = os.lstat(filename).st_mode
116
111
if not stat.S_ISLNK(mod):
118
chmod_if_possible(filename, mod)
113
os.chmod(filename, mod)
121
116
def make_writable(filename):
122
117
mod = os.lstat(filename).st_mode
123
118
if not stat.S_ISLNK(mod):
125
chmod_if_possible(filename, mod)
128
def chmod_if_possible(filename, mode):
129
# Set file mode if that can be safely done.
130
# Sometimes even on unix the filesystem won't allow it - see
131
# https://bugs.launchpad.net/bzr/+bug/606537
133
# It is probably faster to just do the chmod, rather than
134
# doing a stat, and then trying to compare
135
os.chmod(filename, mode)
136
except (IOError, OSError) as e:
137
# Permission/access denied seems to commonly happen on smbfs; there's
138
# probably no point warning about it.
139
# <https://bugs.launchpad.net/bzr/+bug/606537>
140
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
141
trace.mutter("ignore error on chmod of %r: %r" % (
120
os.chmod(filename, mod)
147
123
def minimum_path_selection(paths):
261
232
file_existed = False
263
234
rename_func(new, tmp_name)
264
except (errors.NoSuchFile,):
235
except (errors.NoSuchFile,), e:
267
238
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
268
239
# function raises an IOError with errno is None when a rename fails.
269
240
# This then gets caught here.
270
241
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
272
except Exception as e:
273
244
if (getattr(e, 'errno', None) is None
274
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
245
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
277
248
file_existed = True
281
# This may throw an exception, in which case success will
283
rename_func(old, new)
285
except (IOError, OSError) as e:
286
# source and target may be aliases of each other (e.g. on a
287
# case-insensitive filesystem), so we may have accidentally renamed
288
# source by when we tried to rename target
289
if (file_existed and e.errno in (None, errno.ENOENT)
254
# This may throw an exception, in which case success will
256
rename_func(old, new)
258
except (IOError, OSError), e:
259
# source and target may be aliases of each other (e.g. on a
260
# case-insensitive filesystem), so we may have accidentally renamed
261
# source by when we tried to rename target
262
failure_exc = sys.exc_info()
263
if (file_existed and e.errno in (None, errno.ENOENT)
290
264
and old.lower() == new.lower()):
291
# source and target are the same file on a case-insensitive
292
# filesystem, so we don't generate an exception
265
# source and target are the same file on a case-insensitive
266
# filesystem, so we don't generate an exception
298
270
# If the file used to exist, rename it back into place
301
273
unlink_func(tmp_name)
303
275
rename_func(tmp_name, new)
276
if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
306
280
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
307
281
# choke on a Unicode string containing a relative path if
308
282
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
310
285
def _posix_abspath(path):
311
286
# jam 20060426 rather than encoding to fsencoding
312
287
# copy posixpath.abspath, but use os.getcwdu instead
313
288
if not posixpath.isabs(path):
314
289
path = posixpath.join(getcwd(), path)
315
return _posix_normpath(path)
290
return posixpath.normpath(path)
318
293
def _posix_realpath(path):
319
294
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
322
def _posix_normpath(path):
323
path = posixpath.normpath(path)
324
# Bug 861008: posixpath.normpath() returns a path normalized according to
325
# the POSIX standard, which stipulates (for compatibility reasons) that two
326
# leading slashes must not be simplified to one, and only if there are 3 or
327
# more should they be simplified as one. So we treat the leading 2 slashes
328
# as a special case here by simply removing the first slash, as we consider
329
# that breaking POSIX compatibility for this obscure feature is acceptable.
330
# This is not a paranoid precaution, as we notably get paths like this when
331
# the repo is hosted at the root of the filesystem, i.e. in "/".
332
if path.startswith('//'):
337
def _posix_path_from_environ(key):
338
"""Get unicode path from `key` in environment or None if not present
340
Note that posix systems use arbitrary byte strings for filesystem objects,
341
so a path that raises BadFilenameEncoding here may still be accessible.
343
val = os.environ.get(key, None)
344
if PY3 or val is None:
347
return val.decode(_fs_enc)
348
except UnicodeDecodeError:
349
# GZ 2011-12-12:Ideally want to include `key` in the exception message
350
raise errors.BadFilenameEncoding(val, _fs_enc)
353
def _posix_get_home_dir():
354
"""Get the home directory of the current user as a unicode path"""
355
path = posixpath.expanduser("~")
357
return path.decode(_fs_enc)
358
except AttributeError:
360
except UnicodeDecodeError:
361
raise errors.BadFilenameEncoding(path, _fs_enc)
364
def _posix_getuser_unicode():
365
"""Get username from environment or password database as unicode"""
366
name = getpass.getuser()
369
user_encoding = get_user_encoding()
371
return name.decode(user_encoding)
372
except UnicodeDecodeError:
373
raise errors.BzrError("Encoding of username %r is unsupported by %s "
374
"application locale." % (name, user_encoding))
377
297
def _win32_fixdrive(path):
378
298
"""Force drive letters to be consistent.
383
303
running python.exe under cmd.exe return capital C:\\
384
304
running win32 python inside a cygwin shell returns lowercase c:\\
386
drive, path = ntpath.splitdrive(path)
306
drive, path = _nt_splitdrive(path)
387
307
return drive.upper() + path
390
310
def _win32_abspath(path):
391
# Real ntpath.abspath doesn't have a problem with a unicode cwd
392
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
311
# Real _nt_abspath doesn't have a problem with a unicode cwd
312
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
315
def _win98_abspath(path):
316
"""Return the absolute version of a path.
317
Windows 98 safe implementation (python reimplementation
318
of Win32 API function GetFullPathNameW)
323
# \\HOST\path => //HOST/path
324
# //HOST/path => //HOST/path
325
# path => C:/cwd/path
328
# check for absolute path
329
drive = _nt_splitdrive(path)[0]
330
if drive == '' and path[:2] not in('//','\\\\'):
332
# we cannot simply os.path.join cwd and path
333
# because os.path.join('C:','/path') produce '/path'
334
# and this is incorrect
335
if path[:1] in ('/','\\'):
336
cwd = _nt_splitdrive(cwd)[0]
338
path = cwd + '\\' + path
339
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
395
342
def _win32_realpath(path):
396
# Real ntpath.realpath doesn't have a problem with a unicode cwd
397
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
343
# Real _nt_realpath doesn't have a problem with a unicode cwd
344
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
400
347
def _win32_pathjoin(*args):
401
return ntpath.join(*args).replace('\\', '/')
348
return _nt_join(*args).replace('\\', '/')
404
351
def _win32_normpath(path):
405
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
408
355
def _win32_getcwd():
409
return _win32_fixdrive(_getcwd().replace('\\', '/'))
356
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
412
359
def _win32_mkdtemp(*args, **kwargs):
413
360
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
363
def _add_rename_error_details(e, old, new):
364
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
365
% (old, new, e.strerror))
367
new_e.to_filename = new
416
371
def _win32_rename(old, new):
417
372
"""We expect to be able to atomically replace 'new' with old.
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)
434
399
def _mac_getcwd():
435
return unicodedata.normalize('NFC', _getcwd())
438
def _rename_wrap_exception(rename_func):
439
"""Adds extra information to any exceptions that come from rename().
441
The exception has an updated message and 'old_filename' and 'new_filename'
445
def _rename_wrapper(old, new):
447
rename_func(old, new)
449
detailed_error = OSError(e.errno, e.strerror +
450
" [occurred when renaming '%s' to '%s']" %
452
detailed_error.old_filename = old
453
detailed_error.new_filename = new
456
return _rename_wrapper
459
if sys.version_info > (3,):
465
# Default rename wraps os.rename()
466
rename = _rename_wrap_exception(os.rename)
400
return unicodedata.normalize('NFC', os.getcwdu())
468
403
# Default is to just use the python builtins, but these can be rebound on
469
404
# particular platforms.
470
405
abspath = _posix_abspath
471
406
realpath = _posix_realpath
472
407
pathjoin = os.path.join
473
normpath = _posix_normpath
474
path_from_environ = _posix_path_from_environ
475
_get_home_dir = _posix_get_home_dir
476
getuser_unicode = _posix_getuser_unicode
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
478
411
dirname = os.path.dirname
479
412
basename = os.path.basename
480
413
split = os.path.split
481
414
splitext = os.path.splitext
482
# These were already lazily imported into local scope
415
# These were already imported into local scope
483
416
# mkdtemp = tempfile.mkdtemp
484
417
# rmtree = shutil.rmtree
493
419
MIN_ABS_PATHLENGTH = 1
496
422
if sys.platform == 'win32':
497
abspath = _win32_abspath
423
if win32utils.winver == 'Windows 98':
424
abspath = _win98_abspath
426
abspath = _win32_abspath
498
427
realpath = _win32_realpath
499
428
pathjoin = _win32_pathjoin
500
429
normpath = _win32_normpath
501
430
getcwd = _win32_getcwd
502
431
mkdtemp = _win32_mkdtemp
503
rename = _rename_wrap_exception(_win32_rename)
505
from . import _walkdirs_win32
509
lstat = _walkdirs_win32.lstat
510
fstat = _walkdirs_win32.fstat
511
wrap_stat = _walkdirs_win32.wrap_stat
432
rename = _win32_rename
513
434
MIN_ABS_PATHLENGTH = 3
553
471
On my standard US Windows XP, the preferred encoding is
554
472
cp1252, but the console is cp437
556
:param trace: If True trace the selected encoding via mutter().
558
from .trace import mutter
474
from bzrlib.trace import mutter
559
475
output_encoding = getattr(sys.stdout, 'encoding', None)
560
476
if not output_encoding:
561
477
input_encoding = getattr(sys.stdin, 'encoding', None)
562
478
if not input_encoding:
563
479
output_encoding = get_user_encoding()
565
mutter('encoding stdout as osutils.get_user_encoding() %r',
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
568
483
output_encoding = input_encoding
570
mutter('encoding stdout as sys.stdin encoding %r',
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
574
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
575
487
if output_encoding == 'cp0':
576
488
# invalid encoding (cp0 means 'no codepage' on Windows)
577
489
output_encoding = get_user_encoding()
579
mutter('cp0 is invalid encoding.'
580
' encoding stdout as osutils.get_user_encoding() %r',
490
mutter('cp0 is invalid encoding.'
491
' encoding stdout as osutils.get_user_encoding() %r',
584
495
codecs.lookup(output_encoding)
585
496
except LookupError:
586
sys.stderr.write('brz: warning:'
497
sys.stderr.write('bzr: warning:'
587
498
' unknown terminal encoding %s.\n'
588
499
' Using encoding %s instead.\n'
589
500
% (output_encoding, get_user_encoding())
591
502
output_encoding = get_user_encoding()
593
504
return output_encoding
965
857
plural_seconds = ''
967
859
plural_seconds = 's'
968
if minutes < 90: # print minutes, seconds up to 90 minutes
860
if minutes < 90: # print minutes, seconds up to 90 minutes
970
862
return '%d minute, %d second%s %s' % (
971
minutes, seconds, plural_seconds, direction)
863
minutes, seconds, plural_seconds, direction)
973
865
return '%d minutes, %d second%s %s' % (
974
minutes, seconds, plural_seconds, direction)
866
minutes, seconds, plural_seconds, direction)
976
868
hours = int(minutes / 60)
977
869
minutes -= 60 * hours
986
878
return '%d hours, %d minute%s %s' % (hours, minutes,
987
879
plural_minutes, direction)
991
882
"""Return size of given open file."""
992
return os.fstat(f.fileno())[stat.ST_SIZE]
995
# Alias os.urandom to support platforms (which?) without /dev/urandom and
996
# override if it doesn't work. Avoid checking on windows where there is
997
# significant initialisation cost that can be avoided for some bzr calls.
999
rand_bytes = os.urandom
1001
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
1004
except NotImplementedError:
896
rand_bytes = file('/dev/urandom', 'rb').read
897
# Otherwise, use this hack as a last resort
898
except (IOError, OSError):
1005
899
# not well seeded, but better than nothing
1006
900
def rand_bytes(n):
1025
917
for raw_byte in rand_bytes(num):
1027
s += ALNUM[ord(raw_byte) % 36]
1029
s += ALNUM[raw_byte % 36]
918
s += ALNUM[ord(raw_byte) % 36]
1033
# TODO: We could later have path objects that remember their list
1034
# decomposition (might be too tricksy though.)
922
## TODO: We could later have path objects that remember their list
923
## decomposition (might be too tricksy though.)
1036
925
def splitpath(p):
1037
926
"""Turn string into list of parts."""
1038
927
# split on either delimiter because people might use either on
1040
if isinstance(p, bytes):
1041
ps = re.split(b'[\\\\/]', p)
1043
ps = re.split(r'[\\/]', p)
929
ps = re.split(r'[\\/]', p)
1047
if f in ('..', b'..'):
1048
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1049
elif f in ('.', '', b'.', b''):
934
raise errors.BzrError("sorry, %r not allowed in path" % f)
935
elif (f == '.') or (f == ''):
1084
970
implementation should be loaded instead::
1087
>>> import breezy._fictional_extension_pyx
973
>>> import bzrlib._fictional_extension_pyx
1088
974
>>> except ImportError, e:
1089
>>> breezy.osutils.failed_to_load_extension(e)
1090
>>> import breezy._fictional_extension_py
975
>>> bzrlib.osutils.failed_to_load_extension(e)
976
>>> import bzrlib._fictional_extension_py
1092
978
# NB: This docstring is just an example, not a doctest, because doctest
1093
979
# currently can't cope with the use of lazy imports in this namespace --
1096
982
# This currently doesn't report the failure at the time it occurs, because
1097
983
# they tend to happen very early in startup when we can't check config
1098
984
# files etc, and also we want to report all failures but not spam the user
1099
985
# with 10 warnings.
986
from bzrlib import trace
1100
987
exception_str = str(exception)
1101
988
if exception_str not in _extension_load_failures:
1102
989
trace.mutter("failed to load compiled extension: %s" % exception_str)
1106
993
def report_extension_load_failures():
1107
994
if not _extension_load_failures:
1109
if config.GlobalConfig().suppress_warning('missing_extensions'):
996
from bzrlib.config import GlobalConfig
997
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1111
999
# the warnings framework should by default show this only once
1112
from .trace import warning
1000
from bzrlib.trace import warning
1114
"brz: warning: some compiled extensions could not be loaded; "
1115
"see ``brz help missing-extensions``")
1002
"bzr: warning: some compiled extensions could not be loaded; "
1003
"see <https://answers.launchpad.net/bzr/+faq/703>")
1116
1004
# we no longer show the specific missing extensions here, because it makes
1117
1005
# the message too long and scary - see
1118
1006
# https://bugs.launchpad.net/bzr/+bug/430529
1122
from ._chunks_to_lines_pyx import chunks_to_lines
1123
except ImportError as e:
1010
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1011
except ImportError, e:
1124
1012
failed_to_load_extension(e)
1125
from ._chunks_to_lines_py import chunks_to_lines
1013
from bzrlib._chunks_to_lines_py import chunks_to_lines
1128
1016
def split_lines(s):
1129
1017
"""Split s into lines, but without removing the newline characters."""
1130
1018
# Trivially convert a fulltext into a 'chunked' representation, and let
1131
1019
# chunks_to_lines do the heavy lifting.
1132
if isinstance(s, bytes):
1020
if isinstance(s, str):
1133
1021
# chunks_to_lines only supports 8-bit strings
1134
1022
return chunks_to_lines([s])
1162
1049
os.link(src, dest)
1163
except (OSError, IOError) as e:
1050
except (OSError, IOError), e:
1164
1051
if e.errno != errno.EXDEV:
1166
1053
shutil.copyfile(src, dest)
1169
1056
def delete_any(path):
1170
"""Delete a file, symlink or directory.
1057
"""Delete a file, symlink or directory.
1172
1059
Will delete even if readonly.
1175
_delete_file_or_dir(path)
1176
except (OSError, IOError) as e:
1062
_delete_file_or_dir(path)
1063
except (OSError, IOError), e:
1177
1064
if e.errno in (errno.EPERM, errno.EACCES):
1178
1065
# make writable and try again
1365
1250
# but for now, we haven't optimized...
1366
1251
return [canonical_relpath(base, p) for p in paths]
1369
def decode_filename(filename):
1370
"""Decode the filename using the filesystem encoding
1372
If it is unicode, it is returned.
1373
Otherwise it is decoded from the the filesystem's encoding. If decoding
1374
fails, a errors.BadFilenameEncoding exception is raised.
1376
if isinstance(filename, text_type):
1379
return filename.decode(_fs_enc)
1380
except UnicodeDecodeError:
1381
raise errors.BadFilenameEncoding(filename, _fs_enc)
1384
1253
def safe_unicode(unicode_or_utf8_string):
1385
1254
"""Coerce unicode_or_utf8_string into unicode.
1415
1284
return unicode_or_utf8_string.encode('utf-8')
1418
def safe_revision_id(unicode_or_utf8_string):
1287
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1288
' Revision id generators should be creating utf8'
1292
def safe_revision_id(unicode_or_utf8_string, warn=True):
1419
1293
"""Revision ids should now be utf8, but at one point they were unicode.
1421
1295
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1297
:param warn: Functions that are sanitizing user data can set warn=False
1423
1298
:return: None or a utf8 revision id.
1425
1300
if (unicode_or_utf8_string is None
1426
or unicode_or_utf8_string.__class__ == bytes):
1301
or unicode_or_utf8_string.__class__ == str):
1427
1302
return unicode_or_utf8_string
1428
raise TypeError('Unicode revision ids are no longer supported. '
1429
'Revision id generators should be creating utf8 revision '
1433
def safe_file_id(unicode_or_utf8_string):
1304
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1306
return cache_utf8.encode(unicode_or_utf8_string)
1309
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1310
' generators should be creating utf8 file ids.')
1313
def safe_file_id(unicode_or_utf8_string, warn=True):
1434
1314
"""File ids should now be utf8, but at one point they were unicode.
1436
1316
This is the same as safe_utf8, except it uses the cached encode functions
1475
1358
can be accessed by that path.
1478
if isinstance(path, bytes):
1479
path = path.decode(sys.getfilesystemencoding())
1480
return unicodedata.normalize('NFC', path), True
1361
return unicodedata.normalize('NFC', unicode(path)), True
1483
1364
def _inaccessible_normalized_filename(path):
1484
1365
__doc__ = _accessible_normalized_filename.__doc__
1486
if isinstance(path, bytes):
1487
path = path.decode(sys.getfilesystemencoding())
1488
normalized = unicodedata.normalize('NFC', path)
1367
normalized = unicodedata.normalize('NFC', unicode(path))
1489
1368
return normalized, normalized == path
1552
1424
None is returned if the width can't established precisely.
1555
- if BRZ_COLUMNS is set, returns its value
1427
- if BZR_COLUMNS is set, returns its value
1556
1428
- if there is no controlling terminal, returns None
1557
- query the OS, if the queried size has changed since the last query,
1559
1429
- if COLUMNS is set, returns its value,
1560
- if the OS has a value (even though it's never changed), return its value.
1562
1431
From there, we need to query the OS to get the size of the controlling
1565
On Unices we query the OS by:
1566
1435
- get termios.TIOCGWINSZ
1567
1436
- if an error occurs or a negative value is obtained, returns None
1569
On Windows we query the OS by:
1570
1440
- win32utils.get_console_size() decides,
1571
1441
- returns None on error (provided default value)
1573
# Note to implementors: if changing the rules for determining the width,
1574
# make sure you've considered the behaviour in these cases:
1575
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1576
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1578
# - (add more interesting cases here, if you find any)
1579
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1580
# but we don't want to register a signal handler because it is impossible
1581
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1582
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1583
# time so we can notice if the reported size has changed, which should have
1586
# If BRZ_COLUMNS is set, take it, user is always right
1587
# Except if they specified 0 in which case, impose no limit here
1444
# If BZR_COLUMNS is set, take it, user is always right
1589
width = int(os.environ['BRZ_COLUMNS'])
1446
return int(os.environ['BZR_COLUMNS'])
1590
1447
except (KeyError, ValueError):
1592
if width is not None:
1598
1450
isatty = getattr(sys.stdout, 'isatty', None)
1599
if isatty is None or not isatty():
1600
# Don't guess, setting BRZ_COLUMNS is the recommended way to override.
1451
if isatty is None or not isatty():
1452
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1604
width, height = os_size = _terminal_size(None, None)
1605
global _first_terminal_size, _terminal_size_state
1606
if _terminal_size_state == 'no_data':
1607
_first_terminal_size = os_size
1608
_terminal_size_state = 'unchanged'
1609
elif (_terminal_size_state == 'unchanged' and
1610
_first_terminal_size != os_size):
1611
_terminal_size_state = 'changed'
1613
# If the OS claims to know how wide the terminal is, and this value has
1614
# ever changed, use that.
1615
if _terminal_size_state == 'changed':
1616
if width is not None and width > 0:
1619
# 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))
1621
1459
return int(os.environ['COLUMNS'])
1622
1460
except (KeyError, ValueError):
1625
# Finally, use an unchanged size from the OS, if we have one.
1626
if _terminal_size_state == 'unchanged':
1627
if width is not None and width > 0:
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1630
# The width could not be determined.
1634
1471
def _win32_terminal_size(width, height):
1635
width, height = win32utils.get_console_size(
1636
defaultx=width, defaulty=height)
1472
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1637
1473
return width, height
1640
1476
def _ioctl_terminal_size(width, height):
1478
import struct, fcntl, termios
1645
1479
s = struct.pack('HHHH', 0, 0, 0, 0)
1646
1480
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1647
1481
height, width = struct.unpack('HHHH', x)[0:2]
1665
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
1668
1526
def supports_executable():
1669
1527
return sys.platform != "win32"
1855
1712
global _selected_dir_reader
1856
1713
if _selected_dir_reader is None:
1857
if sys.platform == "win32":
1714
fs_encoding = _fs_enc.upper()
1715
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1716
# Win98 doesn't have unicode apis like FindFirstFileW
1717
# TODO: We possibly could support Win98 by falling back to the
1718
# original FindFirstFile, and using TCHAR instead of WCHAR,
1719
# but that gets a bit tricky, and requires custom compiling
1859
from ._walkdirs_win32 import Win32ReadDir
1722
from bzrlib._walkdirs_win32 import Win32ReadDir
1860
1723
_selected_dir_reader = Win32ReadDir()
1861
1724
except ImportError:
1863
elif _fs_enc in ('utf-8', 'ascii'):
1726
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1727
# ANSI_X3.4-1968 is a form of ASCII
1865
from ._readdir_pyx import UTF8DirReader
1729
from bzrlib._readdir_pyx import UTF8DirReader
1866
1730
_selected_dir_reader = UTF8DirReader()
1867
except ImportError as e:
1731
except ImportError, e:
1868
1732
failed_to_load_extension(e)
1915
1779
See DirReader.read_dir for details.
1917
1781
_utf8_encode = self._utf8_encode
1919
def _fs_decode(s): return s.decode(_fs_enc)
1921
def _fs_encode(s): return s.encode(_fs_enc)
1922
1782
_lstat = os.lstat
1923
1783
_listdir = os.listdir
1924
1784
_kind_from_mode = file_kind_from_stat_mode
1927
relprefix = prefix + b'/'
1787
relprefix = prefix + '/'
1930
top_slash = top + '/'
1790
top_slash = top + u'/'
1933
1793
append = dirblock.append
1934
for name_native in _listdir(top.encode('utf-8')):
1794
for name in sorted(_listdir(top)):
1936
name = _fs_decode(name_native)
1796
name_utf8 = _utf8_encode(name)[0]
1937
1797
except UnicodeDecodeError:
1938
1798
raise errors.BadFilenameEncoding(
1939
relprefix + name_native, _fs_enc)
1940
name_utf8 = _utf8_encode(name)[0]
1799
_utf8_encode(relprefix)[0] + name, _fs_enc)
1941
1800
abspath = top_slash + name
1942
1801
statvalue = _lstat(abspath)
1943
1802
kind = _kind_from_mode(statvalue.st_mode)
1944
1803
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1945
return sorted(dirblock)
1948
1807
def copy_tree(from_path, to_path, handlers={}):
2018
1874
This can be used to sort paths in the same way that walkdirs does.
2020
return (dirname(path), path)
1876
return (dirname(path) , path)
2023
1879
def compare_paths_prefix_order(path_a, path_b):
2024
1880
"""Compare path_a and path_b to generate the same order walkdirs uses."""
2025
1881
key_a = path_prefix_key(path_a)
2026
1882
key_b = path_prefix_key(path_b)
2027
return (key_a > key_b) - (key_a < key_b)
1883
return cmp(key_a, key_b)
2030
1886
_cached_user_encoding = None
2033
def get_user_encoding():
1889
def get_user_encoding(use_cache=True):
2034
1890
"""Find out what the preferred user encoding is.
2036
1892
This is generally the encoding that is used for command line parameters
2037
1893
and file contents. This may be different from the terminal encoding
2038
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)
2040
1900
:return: A string defining the preferred user encoding
2042
1902
global _cached_user_encoding
2043
if _cached_user_encoding is not None:
1903
if _cached_user_encoding is not None and use_cache:
2044
1904
return _cached_user_encoding
2046
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2047
# Use the existing locale settings and call nl_langinfo directly
2048
# rather than going through getpreferredencoding. This avoids
2049
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2050
# possibility of the setlocale call throwing an error.
2051
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'
2053
# GZ 2011-12-19: On windows could call GetACP directly instead.
2054
user_encoding = locale.getpreferredencoding(False)
2057
user_encoding = codecs.lookup(user_encoding).name
2059
if user_encoding not in ("", "cp0"):
2060
sys.stderr.write('brz: warning:'
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)
1949
sys.stderr.write('bzr: warning:'
2061
1950
' unknown encoding %s.'
2062
1951
' Continuing with ascii encoding.\n'
2063
1952
% user_encoding
2065
user_encoding = 'ascii'
2067
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2068
if user_encoding == 'ascii':
2069
if sys.platform == 'darwin':
2070
# OSX is special-cased in Python to have a UTF-8 filesystem
2071
# encoding and previously had LANG set here if not present.
2072
user_encoding = 'utf-8'
2073
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2074
# for some other posix platforms as well.
2076
_cached_user_encoding = user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = user_encoding
2077
1959
return user_encoding
2080
def get_diff_header_encoding():
2081
return get_terminal_encoding()
2084
1962
def get_host_name():
2085
1963
"""Return the current unicode host name.
2102
1979
# data at once.
2103
1980
MAX_SOCKET_CHUNK = 64 * 1024
2105
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2106
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2107
_eno = getattr(errno, _eno, None)
2108
if _eno is not None:
2109
_end_of_stream_errors.append(_eno)
2113
1982
def read_bytes_from_socket(sock, report_activity=None,
2114
max_read_size=MAX_SOCKET_CHUNK):
1983
max_read_size=MAX_SOCKET_CHUNK):
2115
1984
"""Read up to max_read_size of bytes from sock and notify of progress.
2117
1986
Translates "Connection reset by peer" into file-like EOF (return an
2118
1987
empty string rather than raise an error), and repeats the recv if
2119
1988
interrupted by a signal.
2123
data = sock.recv(max_read_size)
2124
except socket.error as e:
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
2125
1994
eno = e.args[0]
2126
if eno in _end_of_stream_errors:
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2127
1996
# The connection was closed by the other side. Callers expect
2128
1997
# an empty string to signal end-of-stream.
2130
1999
elif eno == errno.EINTR:
2131
2000
# Retry the interrupted recv.
2135
2004
if report_activity is not None:
2136
report_activity(len(data), 'read')
2005
report_activity(len(bytes), 'read')
2140
2009
def recv_all(socket, count):
2148
2017
This isn't optimized and is intended mostly for use in testing.
2151
2020
while len(b) < count:
2152
2021
new = read_bytes_from_socket(socket, None, count - len(b))
2159
2028
def send_all(sock, bytes, report_activity=None):
2160
2029
"""Send all bytes on a socket.
2162
2031
Breaks large blocks in smaller chunks to avoid buffering limitations on
2163
2032
some platforms, and catches EINTR which may be thrown if the send is
2164
2033
interrupted by a signal.
2166
2035
This is preferred to socket.sendall(), because it avoids portability bugs
2167
2036
and provides activity reporting.
2169
2038
:param report_activity: Call this as bytes are read, see
2170
2039
Transport._report_activity
2173
2042
byte_count = len(bytes)
2174
view = memoryview(bytes)
2175
2043
while sent_total < byte_count:
2177
sent = sock.send(view[sent_total:sent_total + MAX_SOCKET_CHUNK])
2178
except (socket.error, IOError) as e:
2179
if e.args[0] in _end_of_stream_errors:
2180
raise errors.ConnectionReset(
2181
"Error trying to write to socket", e)
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2182
2047
if e.args[0] != errno.EINTR:
2186
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2188
2050
sent_total += sent
2189
if report_activity is not None:
2190
report_activity(sent, 'write')
2193
def connect_socket(address):
2194
# Slight variation of the socket.create_connection() function (provided by
2195
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2196
# provide it for previous python versions. Also, we don't use the timeout
2197
# parameter (provided by the python implementation) so we don't implement
2199
err = socket.error('getaddrinfo returns an empty list')
2200
host, port = address
2201
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2202
af, socktype, proto, canonname, sa = res
2205
sock = socket.socket(af, socktype, proto)
2209
except socket.error as e:
2211
# 'err' is now the most recent error
2212
if sock is not None:
2051
report_activity(sent, 'write')
2217
2054
def dereference_path(path):
2245
2082
If and when pkg_resources becomes a standard library, this routine
2246
2083
can delegate to it.
2248
# Check package name is within breezy
2249
if package == "breezy":
2085
# Check package name is within bzrlib
2086
if package == "bzrlib":
2250
2087
resource_relpath = resource_name
2251
elif package.startswith("breezy."):
2252
package = package[len("breezy."):].replace('.', os.sep)
2088
elif package.startswith("bzrlib."):
2089
package = package[len("bzrlib."):].replace('.', os.sep)
2253
2090
resource_relpath = pathjoin(package, resource_name)
2255
raise errors.BzrError('resource package %s not in breezy' % package)
2092
raise errors.BzrError('resource package %s not in bzrlib' % package)
2257
2094
# Map the resource to a file and read its contents
2258
base = dirname(breezy.__file__)
2095
base = dirname(bzrlib.__file__)
2259
2096
if getattr(sys, 'frozen', None): # bzr.exe
2260
2097
base = abspath(pathjoin(base, '..', '..'))
2261
with open(pathjoin(base, resource_relpath), "rt") as f:
2098
filename = pathjoin(base, resource_relpath)
2099
return open(filename, 'rU').read()
2265
2102
def file_kind_from_stat_mode_thunk(mode):
2266
2103
global file_kind_from_stat_mode
2267
2104
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2269
from ._readdir_pyx import UTF8DirReader
2106
from bzrlib._readdir_pyx import UTF8DirReader
2270
2107
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2108
except ImportError, e:
2272
2109
# This is one time where we won't warn that an extension failed to
2273
2110
# load. The extension is never available on Windows anyway.
2274
from ._readdir_py import (
2111
from bzrlib._readdir_py import (
2275
2112
_kind_from_mode as file_kind_from_stat_mode
2277
2114
return file_kind_from_stat_mode(mode)
2280
2115
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2283
def file_stat(f, _lstat=os.lstat):
2118
def file_kind(f, _lstat=os.lstat):
2287
except OSError as e:
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2288
2122
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2289
2123
raise errors.NoSuchFile(f)
2293
def file_kind(f, _lstat=os.lstat):
2294
stat_value = file_stat(f, _lstat)
2295
return file_kind_from_stat_mode(stat_value.st_mode)
2298
2127
def until_no_eintr(f, *a, **kw):
2299
2128
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2301
2130
WARNING: you must be certain that it is safe to retry the call repeatedly
2302
2131
if EINTR does occur. This is typically only true for low-level operations
2303
2132
like os.read. If in any doubt, don't use this.
2305
2134
Keep in mind that this is not a complete solution to EINTR. There is
2306
2135
probably code in the Python standard library and other dependencies that
2307
2136
may encounter EINTR if a signal arrives (and there is signal handler for
2308
that signal). So this function can reduce the impact for IO that breezy
2137
that signal). So this function can reduce the impact for IO that bzrlib
2309
2138
directly controls, but it is not a complete solution.
2311
2140
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2314
2143
return f(*a, **kw)
2315
except (IOError, OSError) as e:
2144
except (IOError, OSError), e:
2316
2145
if e.errno == errno.EINTR:
2150
def re_compile_checked(re_string, flags=0, where=""):
2151
"""Return a compiled re, or raise a sensible error.
2153
This should only be used when compiling user-supplied REs.
2155
:param re_string: Text form of regular expression.
2156
:param flags: eg re.IGNORECASE
2157
:param where: Message explaining to the user the context where
2158
it occurred, eg 'log search filter'.
2160
# from https://bugs.launchpad.net/bzr/+bug/251352
2162
re_obj = re.compile(re_string, flags)
2167
where = ' in ' + where
2168
# despite the name 'error' is a type
2169
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
2170
% (where, re_string, e))
2321
2173
if sys.platform == "win32":
2324
2176
return msvcrt.getch()
2329
2181
fd = sys.stdin.fileno()
2330
2182
settings = termios.tcgetattr(fd)
2335
2187
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2338
if sys.platform.startswith('linux'):
2191
if sys.platform == 'linux2':
2339
2192
def _local_concurrency():
2341
return os.sysconf('SC_NPROCESSORS_ONLN')
2342
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
2344
2199
elif sys.platform == 'darwin':
2345
2200
def _local_concurrency():
2346
2201
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2347
2202
stdout=subprocess.PIPE).communicate()[0]
2348
elif "bsd" in sys.platform:
2203
elif sys.platform[0:7] == 'freebsd':
2349
2204
def _local_concurrency():
2350
2205
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2351
2206
stdout=subprocess.PIPE).communicate()[0]
2352
2207
elif sys.platform == 'sunos5':
2353
2208
def _local_concurrency():
2354
return subprocess.Popen(['psrinfo', '-p', ],
2209
return subprocess.Popen(['psrinfo', '-p',],
2355
2210
stdout=subprocess.PIPE).communicate()[0]
2356
2211
elif sys.platform == "win32":
2357
2212
def _local_concurrency():
2377
2231
if _cached_local_concurrency is not None and use_cache:
2378
2232
return _cached_local_concurrency
2380
concurrency = os.environ.get('BRZ_CONCURRENCY', None)
2234
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2381
2235
if concurrency is None:
2382
import multiprocessing
2384
concurrency = multiprocessing.cpu_count()
2385
except NotImplementedError:
2386
# multiprocessing.cpu_count() isn't implemented on all platforms
2388
concurrency = _local_concurrency()
2389
except (OSError, IOError):
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2392
2241
concurrency = int(concurrency)
2393
2242
except (TypeError, ValueError):
2394
2243
concurrency = 1
2396
_cached_local_concurrency = concurrency
2245
_cached_concurrency = concurrency
2397
2246
return concurrency
2454
2302
return os.fdopen(os.open(filename, flags), mode, bufsize)
2456
2304
open_file = open
2459
def available_backup_name(base, exists):
2460
"""Find a non-existing backup file name.
2462
This will *not* create anything, this only return a 'free' entry. This
2463
should be used for checking names in a directory below a locked
2464
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2465
Leap) and generally discouraged.
2467
:param base: The base name.
2469
:param exists: A callable returning True if the path parameter exists.
2472
name = "%s.~%d~" % (base, counter)
2475
name = "%s.~%d~" % (base, counter)
2479
def set_fd_cloexec(fd):
2480
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2481
support for this is not available.
2485
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2486
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2487
except (ImportError, AttributeError):
2488
# Either the fcntl module or specific constants are not present
2492
def find_executable_on_path(name):
2493
"""Finds an executable on the PATH.
2495
On Windows, this will try to append each extension in the PATHEXT
2496
environment variable to the name, if it cannot be found with the name
2499
:param name: The base name of the executable.
2500
:return: The path to the executable found or None.
2502
if sys.platform == 'win32':
2503
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2504
exts = [ext.lower() for ext in exts]
2505
base, ext = os.path.splitext(name)
2507
if ext.lower() not in exts:
2513
path = os.environ.get('PATH')
2514
if path is not None:
2515
path = path.split(os.pathsep)
2518
f = os.path.join(d, name) + ext
2519
if os.access(f, os.X_OK):
2521
if sys.platform == 'win32':
2522
app_path = win32utils.get_app_path(name)
2523
if app_path != name:
2528
def _posix_is_local_pid_dead(pid):
2529
"""True if pid doesn't correspond to live process on this machine"""
2531
# Special meaning of unix kill: just check if it's there.
2533
except OSError as e:
2534
if e.errno == errno.ESRCH:
2535
# On this machine, and really not found: as sure as we can be
2538
elif e.errno == errno.EPERM:
2539
# exists, though not ours
2542
trace.mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2543
# Don't really know.
2546
# Exists and our process: not dead.
2550
if sys.platform == "win32":
2551
is_local_pid_dead = win32utils.is_local_pid_dead
2553
is_local_pid_dead = _posix_is_local_pid_dead
2555
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2556
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2557
if getattr(errno, name, None) is not None]
2560
def fdatasync(fileno):
2561
"""Flush file contents to disk if possible.
2563
:param fileno: Integer OS file handle.
2564
:raises TransportNotPossible: If flushing to disk is not possible.
2566
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2570
except IOError as e:
2571
# See bug #1075108, on some platforms fdatasync exists, but can
2572
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2573
# and reduce the chance of corruption-on-powerloss situations. It
2574
# is not a mandatory call, so it is ok to suppress failures.
2575
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2576
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2580
def ensure_empty_directory_exists(path, exception_class):
2581
"""Make sure a local directory exists and is empty.
2583
If it does not exist, it is created. If it exists and is not empty, an
2584
instance of exception_class is raised.
2588
except OSError as e:
2589
if e.errno != errno.EEXIST:
2591
if os.listdir(path) != []:
2592
raise exception_class(path)
2595
def is_environment_error(evalue):
2596
"""True if exception instance is due to a process environment issue
2598
This includes OSError and IOError, but also other errors that come from
2599
the operating system or core libraries but are not subclasses of those.
2601
if isinstance(evalue, (EnvironmentError, select.error)):
2603
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):