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
25
from bzrlib.lazy_import import lazy_import
27
from .lazy_import import lazy_import
26
28
lazy_import(globals(), """
27
29
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
43
from tempfile import (
44
from tempfile import mkdtemp
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
79
73
# Cross platform wall-clock time functionality with decent resolution.
96
90
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
99
102
def get_unicode_argv():
101
106
user_encoding = get_user_encoding()
102
107
return [a.decode(user_encoding) for a in sys.argv[1:]]
103
108
except UnicodeDecodeError:
104
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
109
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
110
"application locale.").format(a, user_encoding))
108
113
def make_readonly(filename):
109
114
"""Make a filename read-only."""
110
115
mod = os.lstat(filename).st_mode
111
116
if not stat.S_ISLNK(mod):
113
os.chmod(filename, mod)
118
chmod_if_possible(filename, mod)
116
121
def make_writable(filename):
117
122
mod = os.lstat(filename).st_mode
118
123
if not stat.S_ISLNK(mod):
120
os.chmod(filename, 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" % (
123
147
def minimum_path_selection(paths):
232
261
file_existed = False
234
263
rename_func(new, tmp_name)
235
except (errors.NoSuchFile,), e:
264
except (errors.NoSuchFile,):
238
267
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
239
268
# function raises an IOError with errno is None when a rename fails.
240
269
# This then gets caught here.
241
270
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
272
except Exception as e:
244
273
if (getattr(e, 'errno', None) is None
245
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
274
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
248
277
file_existed = True
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)
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)
264
290
and old.lower() == new.lower()):
265
# source and target are the same file on a case-insensitive
266
# filesystem, so we don't generate an exception
291
# source and target are the same file on a case-insensitive
292
# filesystem, so we don't generate an exception
270
298
# If the file used to exist, rename it back into place
273
301
unlink_func(tmp_name)
275
303
rename_func(tmp_name, new)
276
if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
280
306
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
281
307
# choke on a Unicode string containing a relative path if
282
308
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
285
310
def _posix_abspath(path):
286
311
# jam 20060426 rather than encoding to fsencoding
287
312
# copy posixpath.abspath, but use os.getcwdu instead
288
313
if not posixpath.isabs(path):
289
314
path = posixpath.join(getcwd(), path)
290
return posixpath.normpath(path)
315
return _posix_normpath(path)
293
318
def _posix_realpath(path):
294
319
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))
297
377
def _win32_fixdrive(path):
298
378
"""Force drive letters to be consistent.
303
383
running python.exe under cmd.exe return capital C:\\
304
384
running win32 python inside a cygwin shell returns lowercase c:\\
306
drive, path = _nt_splitdrive(path)
386
drive, path = ntpath.splitdrive(path)
307
387
return drive.upper() + path
310
390
def _win32_abspath(path):
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('\\', '/'))
391
# Real ntpath.abspath doesn't have a problem with a unicode cwd
392
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
342
395
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(path).replace('\\', '/'))
347
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(path).replace('\\', '/'))
355
408
def _win32_getcwd():
356
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
409
return _win32_fixdrive(_getcwd().replace('\\', '/'))
359
412
def _win32_mkdtemp(*args, **kwargs):
360
413
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
371
416
def _win32_rename(old, new):
372
417
"""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)
399
434
def _mac_getcwd():
400
return unicodedata.normalize('NFC', os.getcwdu())
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)
403
468
# Default is to just use the python builtins, but these can be rebound on
404
469
# particular platforms.
405
470
abspath = _posix_abspath
406
471
realpath = _posix_realpath
407
472
pathjoin = os.path.join
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
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
411
478
dirname = os.path.dirname
412
479
basename = os.path.basename
413
480
split = os.path.split
414
481
splitext = os.path.splitext
415
# These were already imported into local scope
482
# These were already lazily imported into local scope
416
483
# mkdtemp = tempfile.mkdtemp
417
484
# rmtree = shutil.rmtree
419
493
MIN_ABS_PATHLENGTH = 1
422
496
if sys.platform == 'win32':
423
if win32utils.winver == 'Windows 98':
424
abspath = _win98_abspath
426
abspath = _win32_abspath
497
abspath = _win32_abspath
427
498
realpath = _win32_realpath
428
499
pathjoin = _win32_pathjoin
429
500
normpath = _win32_normpath
430
501
getcwd = _win32_getcwd
431
502
mkdtemp = _win32_mkdtemp
432
rename = _win32_rename
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
434
513
MIN_ABS_PATHLENGTH = 3
471
553
On my standard US Windows XP, the preferred encoding is
472
554
cp1252, but the console is cp437
556
:param trace: If True trace the selected encoding via mutter().
474
from bzrlib.trace import mutter
558
from .trace import mutter
475
559
output_encoding = getattr(sys.stdout, 'encoding', None)
476
560
if not output_encoding:
477
561
input_encoding = getattr(sys.stdin, 'encoding', None)
478
562
if not input_encoding:
479
563
output_encoding = get_user_encoding()
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
565
mutter('encoding stdout as osutils.get_user_encoding() %r',
483
568
output_encoding = input_encoding
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
570
mutter('encoding stdout as sys.stdin encoding %r',
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
574
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
487
575
if output_encoding == 'cp0':
488
576
# invalid encoding (cp0 means 'no codepage' on Windows)
489
577
output_encoding = get_user_encoding()
490
mutter('cp0 is invalid encoding.'
491
' encoding stdout as osutils.get_user_encoding() %r',
579
mutter('cp0 is invalid encoding.'
580
' encoding stdout as osutils.get_user_encoding() %r',
495
584
codecs.lookup(output_encoding)
496
585
except LookupError:
497
sys.stderr.write('bzr: warning:'
586
sys.stderr.write('brz: warning:'
498
587
' unknown terminal encoding %s.\n'
499
588
' Using encoding %s instead.\n'
500
589
% (output_encoding, get_user_encoding())
502
591
output_encoding = get_user_encoding()
504
593
return output_encoding
857
965
plural_seconds = ''
859
967
plural_seconds = 's'
860
if minutes < 90: # print minutes, seconds up to 90 minutes
968
if minutes < 90: # print minutes, seconds up to 90 minutes
862
970
return '%d minute, %d second%s %s' % (
863
minutes, seconds, plural_seconds, direction)
971
minutes, seconds, plural_seconds, direction)
865
973
return '%d minutes, %d second%s %s' % (
866
minutes, seconds, plural_seconds, direction)
974
minutes, seconds, plural_seconds, direction)
868
976
hours = int(minutes / 60)
869
977
minutes -= 60 * hours
878
986
return '%d hours, %d minute%s %s' % (hours, minutes,
879
987
plural_minutes, direction)
882
991
"""Return size of given open file."""
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
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":
896
rand_bytes = file('/dev/urandom', 'rb').read
897
# Otherwise, use this hack as a last resort
898
except (IOError, OSError):
1004
except NotImplementedError:
899
1005
# not well seeded, but better than nothing
900
1006
def rand_bytes(n):
917
1025
for raw_byte in rand_bytes(num):
918
s += ALNUM[ord(raw_byte) % 36]
1027
s += ALNUM[ord(raw_byte) % 36]
1029
s += ALNUM[raw_byte % 36]
922
## TODO: We could later have path objects that remember their list
923
## decomposition (might be too tricksy though.)
1033
# TODO: We could later have path objects that remember their list
1034
# decomposition (might be too tricksy though.)
925
1036
def splitpath(p):
926
1037
"""Turn string into list of parts."""
927
1038
# split on either delimiter because people might use either on
929
ps = re.split(r'[\\/]', p)
1040
if isinstance(p, bytes):
1041
ps = re.split(b'[\\\\/]', p)
1043
ps = re.split(r'[\\/]', p)
934
raise errors.BzrError("sorry, %r not allowed in path" % f)
935
elif (f == '.') or (f == ''):
1047
if f in ('..', b'..'):
1048
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1049
elif f in ('.', '', b'.', b''):
970
1084
implementation should be loaded instead::
973
>>> import bzrlib._fictional_extension_pyx
1087
>>> import breezy._fictional_extension_pyx
974
1088
>>> except ImportError, e:
975
>>> bzrlib.osutils.failed_to_load_extension(e)
976
>>> import bzrlib._fictional_extension_py
1089
>>> breezy.osutils.failed_to_load_extension(e)
1090
>>> import breezy._fictional_extension_py
978
1092
# NB: This docstring is just an example, not a doctest, because doctest
979
1093
# currently can't cope with the use of lazy imports in this namespace --
982
1096
# This currently doesn't report the failure at the time it occurs, because
983
1097
# they tend to happen very early in startup when we can't check config
984
1098
# files etc, and also we want to report all failures but not spam the user
985
1099
# with 10 warnings.
986
from bzrlib import trace
987
1100
exception_str = str(exception)
988
1101
if exception_str not in _extension_load_failures:
989
1102
trace.mutter("failed to load compiled extension: %s" % exception_str)
993
1106
def report_extension_load_failures():
994
1107
if not _extension_load_failures:
996
from bzrlib.config import GlobalConfig
997
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1109
if config.GlobalConfig().suppress_warning('missing_extensions'):
999
1111
# the warnings framework should by default show this only once
1000
from bzrlib.trace import warning
1112
from .trace import warning
1002
"bzr: warning: some compiled extensions could not be loaded; "
1003
"see <https://answers.launchpad.net/bzr/+faq/703>")
1114
"brz: warning: some compiled extensions could not be loaded; "
1115
"see ``brz help missing-extensions``")
1004
1116
# we no longer show the specific missing extensions here, because it makes
1005
1117
# the message too long and scary - see
1006
1118
# https://bugs.launchpad.net/bzr/+bug/430529
1010
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1011
except ImportError, e:
1122
from ._chunks_to_lines_pyx import chunks_to_lines
1123
except ImportError as e:
1012
1124
failed_to_load_extension(e)
1013
from bzrlib._chunks_to_lines_py import chunks_to_lines
1125
from ._chunks_to_lines_py import chunks_to_lines
1016
1128
def split_lines(s):
1017
1129
"""Split s into lines, but without removing the newline characters."""
1018
1130
# Trivially convert a fulltext into a 'chunked' representation, and let
1019
1131
# chunks_to_lines do the heavy lifting.
1020
if isinstance(s, str):
1132
if isinstance(s, bytes):
1021
1133
# chunks_to_lines only supports 8-bit strings
1022
1134
return chunks_to_lines([s])
1049
1162
os.link(src, dest)
1050
except (OSError, IOError), e:
1163
except (OSError, IOError) as e:
1051
1164
if e.errno != errno.EXDEV:
1053
1166
shutil.copyfile(src, dest)
1056
1169
def delete_any(path):
1057
"""Delete a file, symlink or directory.
1170
"""Delete a file, symlink or directory.
1059
1172
Will delete even if readonly.
1062
_delete_file_or_dir(path)
1063
except (OSError, IOError), e:
1175
_delete_file_or_dir(path)
1176
except (OSError, IOError) as e:
1064
1177
if e.errno in (errno.EPERM, errno.EACCES):
1065
1178
# make writable and try again
1250
1365
# but for now, we haven't optimized...
1251
1366
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)
1253
1384
def safe_unicode(unicode_or_utf8_string):
1254
1385
"""Coerce unicode_or_utf8_string into unicode.
1284
1415
return unicode_or_utf8_string.encode('utf-8')
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):
1418
def safe_revision_id(unicode_or_utf8_string):
1293
1419
"""Revision ids should now be utf8, but at one point they were unicode.
1295
1421
: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
1298
1423
:return: None or a utf8 revision id.
1300
1425
if (unicode_or_utf8_string is None
1301
or unicode_or_utf8_string.__class__ == str):
1426
or unicode_or_utf8_string.__class__ == bytes):
1302
1427
return 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):
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):
1314
1434
"""File ids should now be utf8, but at one point they were unicode.
1316
1436
This is the same as safe_utf8, except it uses the cached encode functions
1358
1475
can be accessed by that path.
1361
return unicodedata.normalize('NFC', unicode(path)), True
1478
if isinstance(path, bytes):
1479
path = path.decode(sys.getfilesystemencoding())
1480
return unicodedata.normalize('NFC', path), True
1364
1483
def _inaccessible_normalized_filename(path):
1365
1484
__doc__ = _accessible_normalized_filename.__doc__
1367
normalized = unicodedata.normalize('NFC', unicode(path))
1486
if isinstance(path, bytes):
1487
path = path.decode(sys.getfilesystemencoding())
1488
normalized = unicodedata.normalize('NFC', path)
1368
1489
return normalized, normalized == path
1424
1552
None is returned if the width can't established precisely.
1427
- if BZR_COLUMNS is set, returns its value
1555
- if BRZ_COLUMNS is set, returns its value
1428
1556
- if there is no controlling terminal, returns None
1557
- query the OS, if the queried size has changed since the last query,
1429
1559
- if COLUMNS is set, returns its value,
1560
- if the OS has a value (even though it's never changed), return its value.
1431
1562
From there, we need to query the OS to get the size of the controlling
1565
On Unices we query the OS by:
1435
1566
- get termios.TIOCGWINSZ
1436
1567
- if an error occurs or a negative value is obtained, returns None
1569
On Windows we query the OS by:
1440
1570
- win32utils.get_console_size() decides,
1441
1571
- 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
1444
# If BZR_COLUMNS is set, take it, user is always right
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
1446
return int(os.environ['BZR_COLUMNS'])
1589
width = int(os.environ['BRZ_COLUMNS'])
1447
1590
except (KeyError, ValueError):
1592
if width is not None:
1450
1598
isatty = getattr(sys.stdout, 'isatty', None)
1451
if isatty is None or not isatty():
1452
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1599
if isatty is None or not isatty():
1600
# Don't guess, setting BRZ_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))
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.
1459
1621
return int(os.environ['COLUMNS'])
1460
1622
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
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:
1630
# The width could not be determined.
1471
1634
def _win32_terminal_size(width, height):
1472
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1635
width, height = win32utils.get_console_size(
1636
defaultx=width, defaulty=height)
1473
1637
return width, height
1476
1640
def _ioctl_terminal_size(width, height):
1478
import struct, fcntl, termios
1479
1645
s = struct.pack('HHHH', 0, 0, 0, 0)
1480
1646
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1481
1647
height, width = struct.unpack('HHHH', x)[0:2]
1498
1665
_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
1668
def supports_executable():
1527
1669
return sys.platform != "win32"
1712
1855
global _selected_dir_reader
1713
1856
if _selected_dir_reader is None:
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
1857
if sys.platform == "win32":
1722
from bzrlib._walkdirs_win32 import Win32ReadDir
1859
from ._walkdirs_win32 import Win32ReadDir
1723
1860
_selected_dir_reader = Win32ReadDir()
1724
1861
except ImportError:
1726
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1727
# ANSI_X3.4-1968 is a form of ASCII
1863
elif _fs_enc in ('utf-8', 'ascii'):
1729
from bzrlib._readdir_pyx import UTF8DirReader
1865
from ._readdir_pyx import UTF8DirReader
1730
1866
_selected_dir_reader = UTF8DirReader()
1731
except ImportError, e:
1867
except ImportError as e:
1732
1868
failed_to_load_extension(e)
1779
1915
See DirReader.read_dir for details.
1781
1917
_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)
1782
1922
_lstat = os.lstat
1783
1923
_listdir = os.listdir
1784
1924
_kind_from_mode = file_kind_from_stat_mode
1787
relprefix = prefix + '/'
1927
relprefix = prefix + b'/'
1790
top_slash = top + u'/'
1930
top_slash = top + '/'
1793
1933
append = dirblock.append
1794
for name in sorted(_listdir(top)):
1934
for name_native in _listdir(top.encode('utf-8')):
1796
name_utf8 = _utf8_encode(name)[0]
1936
name = _fs_decode(name_native)
1797
1937
except UnicodeDecodeError:
1798
1938
raise errors.BadFilenameEncoding(
1799
_utf8_encode(relprefix)[0] + name, _fs_enc)
1939
relprefix + name_native, _fs_enc)
1940
name_utf8 = _utf8_encode(name)[0]
1800
1941
abspath = top_slash + name
1801
1942
statvalue = _lstat(abspath)
1802
1943
kind = _kind_from_mode(statvalue.st_mode)
1803
1944
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1945
return sorted(dirblock)
1807
1948
def copy_tree(from_path, to_path, handlers={}):
1874
2018
This can be used to sort paths in the same way that walkdirs does.
1876
return (dirname(path) , path)
2020
return (dirname(path), path)
1879
2023
def compare_paths_prefix_order(path_a, path_b):
1880
2024
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1881
2025
key_a = path_prefix_key(path_a)
1882
2026
key_b = path_prefix_key(path_b)
1883
return cmp(key_a, key_b)
2027
return (key_a > key_b) - (key_a < key_b)
1886
2030
_cached_user_encoding = None
1889
def get_user_encoding(use_cache=True):
2033
def get_user_encoding():
1890
2034
"""Find out what the preferred user encoding is.
1892
2036
This is generally the encoding that is used for command line parameters
1893
2037
and file contents. This may be different from the terminal encoding
1894
2038
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)
1900
2040
:return: A string defining the preferred user encoding
1902
2042
global _cached_user_encoding
1903
if _cached_user_encoding is not None and use_cache:
2043
if _cached_user_encoding is not None:
1904
2044
return _cached_user_encoding
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'
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)
2053
# GZ 2011-12-19: On windows could call GetACP directly instead.
2054
user_encoding = locale.getpreferredencoding(False)
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:'
2057
user_encoding = codecs.lookup(user_encoding).name
2059
if user_encoding not in ("", "cp0"):
2060
sys.stderr.write('brz: warning:'
1950
2061
' unknown encoding %s.'
1951
2062
' Continuing with ascii encoding.\n'
1952
2063
% user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = 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
1959
2077
return user_encoding
2080
def get_diff_header_encoding():
2081
return get_terminal_encoding()
1962
2084
def get_host_name():
1963
2085
"""Return the current unicode host name.
1979
2102
# data at once.
1980
2103
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)
1982
2113
def read_bytes_from_socket(sock, report_activity=None,
1983
max_read_size=MAX_SOCKET_CHUNK):
2114
max_read_size=MAX_SOCKET_CHUNK):
1984
2115
"""Read up to max_read_size of bytes from sock and notify of progress.
1986
2117
Translates "Connection reset by peer" into file-like EOF (return an
1987
2118
empty string rather than raise an error), and repeats the recv if
1988
2119
interrupted by a signal.
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
2123
data = sock.recv(max_read_size)
2124
except socket.error as e:
1994
2125
eno = e.args[0]
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2126
if eno in _end_of_stream_errors:
1996
2127
# The connection was closed by the other side. Callers expect
1997
2128
# an empty string to signal end-of-stream.
1999
2130
elif eno == errno.EINTR:
2000
2131
# Retry the interrupted recv.
2004
2135
if report_activity is not None:
2005
report_activity(len(bytes), 'read')
2136
report_activity(len(data), 'read')
2009
2140
def recv_all(socket, count):
2017
2148
This isn't optimized and is intended mostly for use in testing.
2020
2151
while len(b) < count:
2021
2152
new = read_bytes_from_socket(socket, None, count - len(b))
2028
2159
def send_all(sock, bytes, report_activity=None):
2029
2160
"""Send all bytes on a socket.
2031
2162
Breaks large blocks in smaller chunks to avoid buffering limitations on
2032
2163
some platforms, and catches EINTR which may be thrown if the send is
2033
2164
interrupted by a signal.
2035
2166
This is preferred to socket.sendall(), because it avoids portability bugs
2036
2167
and provides activity reporting.
2038
2169
:param report_activity: Call this as bytes are read, see
2039
2170
Transport._report_activity
2042
2173
byte_count = len(bytes)
2174
view = memoryview(bytes)
2043
2175
while sent_total < byte_count:
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
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)
2047
2182
if e.args[0] != errno.EINTR:
2186
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2050
2188
sent_total += sent
2051
report_activity(sent, 'write')
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:
2054
2217
def dereference_path(path):
2082
2245
If and when pkg_resources becomes a standard library, this routine
2083
2246
can delegate to it.
2085
# Check package name is within bzrlib
2086
if package == "bzrlib":
2248
# Check package name is within breezy
2249
if package == "breezy":
2087
2250
resource_relpath = resource_name
2088
elif package.startswith("bzrlib."):
2089
package = package[len("bzrlib."):].replace('.', os.sep)
2251
elif package.startswith("breezy."):
2252
package = package[len("breezy."):].replace('.', os.sep)
2090
2253
resource_relpath = pathjoin(package, resource_name)
2092
raise errors.BzrError('resource package %s not in bzrlib' % package)
2255
raise errors.BzrError('resource package %s not in breezy' % package)
2094
2257
# Map the resource to a file and read its contents
2095
base = dirname(bzrlib.__file__)
2258
base = dirname(breezy.__file__)
2096
2259
if getattr(sys, 'frozen', None): # bzr.exe
2097
2260
base = abspath(pathjoin(base, '..', '..'))
2098
filename = pathjoin(base, resource_relpath)
2099
return open(filename, 'rU').read()
2261
with open(pathjoin(base, resource_relpath), "rt") as f:
2102
2265
def file_kind_from_stat_mode_thunk(mode):
2103
2266
global file_kind_from_stat_mode
2104
2267
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2106
from bzrlib._readdir_pyx import UTF8DirReader
2269
from ._readdir_pyx import UTF8DirReader
2107
2270
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2108
except ImportError, e:
2109
2272
# This is one time where we won't warn that an extension failed to
2110
2273
# load. The extension is never available on Windows anyway.
2111
from bzrlib._readdir_py import (
2274
from ._readdir_py import (
2112
2275
_kind_from_mode as file_kind_from_stat_mode
2114
2277
return file_kind_from_stat_mode(mode)
2115
2280
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2283
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2287
except OSError as e:
2122
2288
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2289
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)
2127
2298
def until_no_eintr(f, *a, **kw):
2128
2299
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2301
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2302
if EINTR does occur. This is typically only true for low-level operations
2132
2303
like os.read. If in any doubt, don't use this.
2134
2305
Keep in mind that this is not a complete solution to EINTR. There is
2135
2306
probably code in the Python standard library and other dependencies that
2136
2307
may encounter EINTR if a signal arrives (and there is signal handler for
2137
that signal). So this function can reduce the impact for IO that bzrlib
2308
that signal). So this function can reduce the impact for IO that breezy
2138
2309
directly controls, but it is not a complete solution.
2140
2311
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2143
2314
return f(*a, **kw)
2144
except (IOError, OSError), e:
2315
except (IOError, OSError) as e:
2145
2316
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))
2173
2321
if sys.platform == "win32":
2176
2324
return msvcrt.getch()
2181
2329
fd = sys.stdin.fileno()
2182
2330
settings = termios.tcgetattr(fd)
2187
2335
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2338
if sys.platform.startswith('linux'):
2192
2339
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
2341
return os.sysconf('SC_NPROCESSORS_ONLN')
2342
except (ValueError, OSError, AttributeError):
2199
2344
elif sys.platform == 'darwin':
2200
2345
def _local_concurrency():
2201
2346
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2347
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2348
elif "bsd" in sys.platform:
2204
2349
def _local_concurrency():
2205
2350
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2351
stdout=subprocess.PIPE).communicate()[0]
2207
2352
elif sys.platform == 'sunos5':
2208
2353
def _local_concurrency():
2209
return subprocess.Popen(['psrinfo', '-p',],
2354
return subprocess.Popen(['psrinfo', '-p', ],
2210
2355
stdout=subprocess.PIPE).communicate()[0]
2211
2356
elif sys.platform == "win32":
2212
2357
def _local_concurrency():
2231
2377
if _cached_local_concurrency is not None and use_cache:
2232
2378
return _cached_local_concurrency
2234
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2380
concurrency = os.environ.get('BRZ_CONCURRENCY', None)
2235
2381
if concurrency is None:
2382
import multiprocessing
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
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):
2241
2392
concurrency = int(concurrency)
2242
2393
except (TypeError, ValueError):
2243
2394
concurrency = 1
2245
_cached_concurrency = concurrency
2396
_cached_local_concurrency = concurrency
2246
2397
return concurrency
2302
2454
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2456
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):