14
14
# along with this program; if not, write to the Free Software
15
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# 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
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from .lazy_import import lazy_import
25
from bzrlib.lazy_import import lazy_import
28
26
lazy_import(globals(), """
29
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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# We need to import both shutil and rmtree as we export the later on posix
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# and need the former on windows
38
from shutil import rmtree
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# We need to import both tempfile and mkdtemp as we export the later on posix
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# and need the former on windows
44
from tempfile import mkdtemp
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from tempfile import (
52
from breezy.i18n import gettext
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from bzrlib.symbol_versioning import (
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# sha and md5 modules are deprecated in python2.6 but hashlib is available as
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if sys.version_info < (2, 5):
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import md5 as _mod_md5
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import sha as _mod_sha
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from bzrlib import symbol_versioning
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# Cross platform wall-clock time functionality with decent resolution.
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O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
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class UnsupportedTimezoneFormat(errors.BzrError):
95
_fmt = ('Unsupported timezone format "%(timezone)s", '
96
'options are "utc", "original", "local".')
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def __init__(self, timezone):
99
self.timezone = timezone
102
99
def get_unicode_argv():
106
101
user_encoding = get_user_encoding()
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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))
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raise errors.BzrError(("Parameter '%r' is unsupported by the current "
113
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def make_readonly(filename):
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"""Make a filename read-only."""
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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chmod_if_possible(filename, mod)
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os.chmod(filename, mod)
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def make_writable(filename):
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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chmod_if_possible(filename, mod)
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def chmod_if_possible(filename, mode):
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# Set file mode if that can be safely done.
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# Sometimes even on unix the filesystem won't allow it - see
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# https://bugs.launchpad.net/bzr/+bug/606537
133
# It is probably faster to just do the chmod, rather than
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# doing a stat, and then trying to compare
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os.chmod(filename, mode)
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except (IOError, OSError) as e:
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# Permission/access denied seems to commonly happen on smbfs; there's
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# probably no point warning about it.
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# <https://bugs.launchpad.net/bzr/+bug/606537>
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if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
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trace.mutter("ignore error on chmod of %r: %r" % (
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os.chmod(filename, mod)
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def minimum_path_selection(paths):
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file_existed = False
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rename_func(new, tmp_name)
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except (errors.NoSuchFile,):
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except (errors.NoSuchFile,), e:
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# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
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# function raises an IOError with errno is None when a rename fails.
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# This then gets caught here.
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if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
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except Exception as e:
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if (getattr(e, 'errno', None) is None
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or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
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or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
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file_existed = True
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# This may throw an exception, in which case success will
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rename_func(old, new)
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except (IOError, OSError) as e:
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# source and target may be aliases of each other (e.g. on a
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# case-insensitive filesystem), so we may have accidentally renamed
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# source by when we tried to rename target
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if (file_existed and e.errno in (None, errno.ENOENT)
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# This may throw an exception, in which case success will
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rename_func(old, new)
258
except (IOError, OSError), e:
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# 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()):
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# 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
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# filesystem, so we don't generate an exception
298
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# If the file used to exist, rename it back into place
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unlink_func(tmp_name)
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rename_func(tmp_name, new)
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if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
306
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
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# choke on a Unicode string containing a relative path if
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
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_fs_enc = sys.getfilesystemencoding() or 'utf-8'
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def _posix_abspath(path):
311
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# jam 20060426 rather than encoding to fsencoding
312
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# 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):
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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):
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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
if os.path.sep == '\\':
1039
# split on either delimiter because people might use either on
1041
if isinstance(p, bytes):
1042
ps = re.split(b'[\\\\/]', p)
1044
ps = re.split(r'[\\/]', p)
1046
if isinstance(p, bytes):
927
# split on either delimiter because people might use either on
929
ps = re.split(r'[\\/]', p)
1053
if f in ('..', b'..'):
1054
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1055
elif f in ('.', '', b'.', b''):
934
raise errors.BzrError("sorry, %r not allowed in path" % f)
935
elif (f == '.') or (f == ''):
1090
970
implementation should be loaded instead::
1093
>>> import breezy._fictional_extension_pyx
973
>>> import bzrlib._fictional_extension_pyx
1094
974
>>> except ImportError, e:
1095
>>> breezy.osutils.failed_to_load_extension(e)
1096
>>> import breezy._fictional_extension_py
975
>>> bzrlib.osutils.failed_to_load_extension(e)
976
>>> import bzrlib._fictional_extension_py
1098
978
# NB: This docstring is just an example, not a doctest, because doctest
1099
979
# currently can't cope with the use of lazy imports in this namespace --
1102
982
# This currently doesn't report the failure at the time it occurs, because
1103
983
# they tend to happen very early in startup when we can't check config
1104
984
# files etc, and also we want to report all failures but not spam the user
1105
985
# with 10 warnings.
986
from bzrlib import trace
1106
987
exception_str = str(exception)
1107
988
if exception_str not in _extension_load_failures:
1108
989
trace.mutter("failed to load compiled extension: %s" % exception_str)
1112
993
def report_extension_load_failures():
1113
994
if not _extension_load_failures:
1115
if config.GlobalConfig().suppress_warning('missing_extensions'):
996
from bzrlib.config import GlobalConfig
997
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1117
999
# the warnings framework should by default show this only once
1118
from .trace import warning
1000
from bzrlib.trace import warning
1120
"brz: warning: some compiled extensions could not be loaded; "
1121
"see ``brz help missing-extensions``")
1002
"bzr: warning: some compiled extensions could not be loaded; "
1003
"see <https://answers.launchpad.net/bzr/+faq/703>")
1122
1004
# we no longer show the specific missing extensions here, because it makes
1123
1005
# the message too long and scary - see
1124
1006
# https://bugs.launchpad.net/bzr/+bug/430529
1128
from ._chunks_to_lines_pyx import chunks_to_lines
1129
except ImportError as e:
1010
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1011
except ImportError, e:
1130
1012
failed_to_load_extension(e)
1131
from ._chunks_to_lines_py import chunks_to_lines
1013
from bzrlib._chunks_to_lines_py import chunks_to_lines
1134
1016
def split_lines(s):
1135
1017
"""Split s into lines, but without removing the newline characters."""
1136
1018
# Trivially convert a fulltext into a 'chunked' representation, and let
1137
1019
# chunks_to_lines do the heavy lifting.
1138
if isinstance(s, bytes):
1020
if isinstance(s, str):
1139
1021
# chunks_to_lines only supports 8-bit strings
1140
1022
return chunks_to_lines([s])
1168
1049
os.link(src, dest)
1169
except (OSError, IOError) as e:
1050
except (OSError, IOError), e:
1170
1051
if e.errno != errno.EXDEV:
1172
1053
shutil.copyfile(src, dest)
1175
1056
def delete_any(path):
1176
"""Delete a file, symlink or directory.
1057
"""Delete a file, symlink or directory.
1178
1059
Will delete even if readonly.
1181
_delete_file_or_dir(path)
1182
except (OSError, IOError) as e:
1062
_delete_file_or_dir(path)
1063
except (OSError, IOError), e:
1183
1064
if e.errno in (errno.EPERM, errno.EACCES):
1184
1065
# make writable and try again
1371
1250
# but for now, we haven't optimized...
1372
1251
return [canonical_relpath(base, p) for p in paths]
1375
def decode_filename(filename):
1376
"""Decode the filename using the filesystem encoding
1378
If it is unicode, it is returned.
1379
Otherwise it is decoded from the the filesystem's encoding. If decoding
1380
fails, a errors.BadFilenameEncoding exception is raised.
1382
if isinstance(filename, text_type):
1385
return filename.decode(_fs_enc)
1386
except UnicodeDecodeError:
1387
raise errors.BadFilenameEncoding(filename, _fs_enc)
1390
1253
def safe_unicode(unicode_or_utf8_string):
1391
1254
"""Coerce unicode_or_utf8_string into unicode.
1421
1284
return unicode_or_utf8_string.encode('utf-8')
1424
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):
1425
1293
"""Revision ids should now be utf8, but at one point they were unicode.
1427
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
1429
1298
:return: None or a utf8 revision id.
1431
1300
if (unicode_or_utf8_string is None
1432
or unicode_or_utf8_string.__class__ == bytes):
1301
or unicode_or_utf8_string.__class__ == str):
1433
1302
return unicode_or_utf8_string
1434
raise TypeError('Unicode revision ids are no longer supported. '
1435
'Revision id generators should be creating utf8 revision '
1439
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):
1440
1314
"""File ids should now be utf8, but at one point they were unicode.
1442
1316
This is the same as safe_utf8, except it uses the cached encode functions
1481
1358
can be accessed by that path.
1484
if isinstance(path, bytes):
1485
path = path.decode(sys.getfilesystemencoding())
1486
return unicodedata.normalize('NFC', path), True
1361
return unicodedata.normalize('NFC', unicode(path)), True
1489
1364
def _inaccessible_normalized_filename(path):
1490
1365
__doc__ = _accessible_normalized_filename.__doc__
1492
if isinstance(path, bytes):
1493
path = path.decode(sys.getfilesystemencoding())
1494
normalized = unicodedata.normalize('NFC', path)
1367
normalized = unicodedata.normalize('NFC', unicode(path))
1495
1368
return normalized, normalized == path
1558
1424
None is returned if the width can't established precisely.
1561
- if BRZ_COLUMNS is set, returns its value
1427
- if BZR_COLUMNS is set, returns its value
1562
1428
- if there is no controlling terminal, returns None
1563
- query the OS, if the queried size has changed since the last query,
1565
1429
- if COLUMNS is set, returns its value,
1566
- if the OS has a value (even though it's never changed), return its value.
1568
1431
From there, we need to query the OS to get the size of the controlling
1571
On Unices we query the OS by:
1572
1435
- get termios.TIOCGWINSZ
1573
1436
- if an error occurs or a negative value is obtained, returns None
1575
On Windows we query the OS by:
1576
1440
- win32utils.get_console_size() decides,
1577
1441
- returns None on error (provided default value)
1579
# Note to implementors: if changing the rules for determining the width,
1580
# make sure you've considered the behaviour in these cases:
1581
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1582
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1584
# - (add more interesting cases here, if you find any)
1585
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1586
# but we don't want to register a signal handler because it is impossible
1587
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1588
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1589
# time so we can notice if the reported size has changed, which should have
1592
# If BRZ_COLUMNS is set, take it, user is always right
1593
# Except if they specified 0 in which case, impose no limit here
1444
# If BZR_COLUMNS is set, take it, user is always right
1595
width = int(os.environ['BRZ_COLUMNS'])
1446
return int(os.environ['BZR_COLUMNS'])
1596
1447
except (KeyError, ValueError):
1598
if width is not None:
1604
1450
isatty = getattr(sys.stdout, 'isatty', None)
1605
if isatty is None or not isatty():
1606
# 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.
1610
width, height = os_size = _terminal_size(None, None)
1611
global _first_terminal_size, _terminal_size_state
1612
if _terminal_size_state == 'no_data':
1613
_first_terminal_size = os_size
1614
_terminal_size_state = 'unchanged'
1615
elif (_terminal_size_state == 'unchanged' and
1616
_first_terminal_size != os_size):
1617
_terminal_size_state = 'changed'
1619
# If the OS claims to know how wide the terminal is, and this value has
1620
# ever changed, use that.
1621
if _terminal_size_state == 'changed':
1622
if width is not None and width > 0:
1625
# 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))
1627
1459
return int(os.environ['COLUMNS'])
1628
1460
except (KeyError, ValueError):
1631
# Finally, use an unchanged size from the OS, if we have one.
1632
if _terminal_size_state == 'unchanged':
1633
if width is not None and width > 0:
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1636
# The width could not be determined.
1640
1471
def _win32_terminal_size(width, height):
1641
width, height = win32utils.get_console_size(
1642
defaultx=width, defaulty=height)
1472
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1643
1473
return width, height
1646
1476
def _ioctl_terminal_size(width, height):
1478
import struct, fcntl, termios
1651
1479
s = struct.pack('HHHH', 0, 0, 0, 0)
1652
1480
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1653
1481
height, width = struct.unpack('HHHH', x)[0:2]
1671
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
1674
1526
def supports_executable():
1675
1527
return sys.platform != "win32"
1861
1712
global _selected_dir_reader
1862
1713
if _selected_dir_reader is None:
1863
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
1865
from ._walkdirs_win32 import Win32ReadDir
1722
from bzrlib._walkdirs_win32 import Win32ReadDir
1866
1723
_selected_dir_reader = Win32ReadDir()
1867
1724
except ImportError:
1869
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
1871
from ._readdir_pyx import UTF8DirReader
1729
from bzrlib._readdir_pyx import UTF8DirReader
1872
1730
_selected_dir_reader = UTF8DirReader()
1873
except ImportError as e:
1731
except ImportError, e:
1874
1732
failed_to_load_extension(e)
1921
1779
See DirReader.read_dir for details.
1923
1781
_utf8_encode = self._utf8_encode
1925
def _fs_decode(s): return s.decode(_fs_enc)
1927
def _fs_encode(s): return s.encode(_fs_enc)
1928
1782
_lstat = os.lstat
1929
1783
_listdir = os.listdir
1930
1784
_kind_from_mode = file_kind_from_stat_mode
1933
relprefix = prefix + b'/'
1787
relprefix = prefix + '/'
1936
top_slash = top + '/'
1790
top_slash = top + u'/'
1939
1793
append = dirblock.append
1940
for name_native in _listdir(top.encode('utf-8')):
1794
for name in sorted(_listdir(top)):
1942
name = _fs_decode(name_native)
1796
name_utf8 = _utf8_encode(name)[0]
1943
1797
except UnicodeDecodeError:
1944
1798
raise errors.BadFilenameEncoding(
1945
relprefix + name_native, _fs_enc)
1946
name_utf8 = _utf8_encode(name)[0]
1799
_utf8_encode(relprefix)[0] + name, _fs_enc)
1947
1800
abspath = top_slash + name
1948
1801
statvalue = _lstat(abspath)
1949
1802
kind = _kind_from_mode(statvalue.st_mode)
1950
1803
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1951
return sorted(dirblock)
1954
1807
def copy_tree(from_path, to_path, handlers={}):
2024
1874
This can be used to sort paths in the same way that walkdirs does.
2026
return (dirname(path), path)
1876
return (dirname(path) , path)
2029
1879
def compare_paths_prefix_order(path_a, path_b):
2030
1880
"""Compare path_a and path_b to generate the same order walkdirs uses."""
2031
1881
key_a = path_prefix_key(path_a)
2032
1882
key_b = path_prefix_key(path_b)
2033
return (key_a > key_b) - (key_a < key_b)
1883
return cmp(key_a, key_b)
2036
1886
_cached_user_encoding = None
2039
def get_user_encoding():
1889
def get_user_encoding(use_cache=True):
2040
1890
"""Find out what the preferred user encoding is.
2042
1892
This is generally the encoding that is used for command line parameters
2043
1893
and file contents. This may be different from the terminal encoding
2044
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)
2046
1900
:return: A string defining the preferred user encoding
2048
1902
global _cached_user_encoding
2049
if _cached_user_encoding is not None:
1903
if _cached_user_encoding is not None and use_cache:
2050
1904
return _cached_user_encoding
2052
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2053
# Use the existing locale settings and call nl_langinfo directly
2054
# rather than going through getpreferredencoding. This avoids
2055
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2056
# possibility of the setlocale call throwing an error.
2057
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'
2059
# GZ 2011-12-19: On windows could call GetACP directly instead.
2060
user_encoding = locale.getpreferredencoding(False)
2063
user_encoding = codecs.lookup(user_encoding).name
2065
if user_encoding not in ("", "cp0"):
2066
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:'
2067
1950
' unknown encoding %s.'
2068
1951
' Continuing with ascii encoding.\n'
2069
1952
% user_encoding
2071
user_encoding = 'ascii'
2073
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2074
if user_encoding == 'ascii':
2075
if sys.platform == 'darwin':
2076
# OSX is special-cased in Python to have a UTF-8 filesystem
2077
# encoding and previously had LANG set here if not present.
2078
user_encoding = 'utf-8'
2079
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2080
# for some other posix platforms as well.
2082
_cached_user_encoding = user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = user_encoding
2083
1959
return user_encoding
2086
def get_diff_header_encoding():
2087
return get_terminal_encoding()
2090
1962
def get_host_name():
2091
1963
"""Return the current unicode host name.
2108
1979
# data at once.
2109
1980
MAX_SOCKET_CHUNK = 64 * 1024
2111
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2112
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2113
_eno = getattr(errno, _eno, None)
2114
if _eno is not None:
2115
_end_of_stream_errors.append(_eno)
2119
1982
def read_bytes_from_socket(sock, report_activity=None,
2120
max_read_size=MAX_SOCKET_CHUNK):
1983
max_read_size=MAX_SOCKET_CHUNK):
2121
1984
"""Read up to max_read_size of bytes from sock and notify of progress.
2123
1986
Translates "Connection reset by peer" into file-like EOF (return an
2124
1987
empty string rather than raise an error), and repeats the recv if
2125
1988
interrupted by a signal.
2129
data = sock.recv(max_read_size)
2130
except socket.error as e:
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
2131
1994
eno = e.args[0]
2132
if eno in _end_of_stream_errors:
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2133
1996
# The connection was closed by the other side. Callers expect
2134
1997
# an empty string to signal end-of-stream.
2136
1999
elif eno == errno.EINTR:
2137
2000
# Retry the interrupted recv.
2141
2004
if report_activity is not None:
2142
report_activity(len(data), 'read')
2005
report_activity(len(bytes), 'read')
2146
2009
def recv_all(socket, count):
2154
2017
This isn't optimized and is intended mostly for use in testing.
2157
2020
while len(b) < count:
2158
2021
new = read_bytes_from_socket(socket, None, count - len(b))
2165
2028
def send_all(sock, bytes, report_activity=None):
2166
2029
"""Send all bytes on a socket.
2168
2031
Breaks large blocks in smaller chunks to avoid buffering limitations on
2169
2032
some platforms, and catches EINTR which may be thrown if the send is
2170
2033
interrupted by a signal.
2172
2035
This is preferred to socket.sendall(), because it avoids portability bugs
2173
2036
and provides activity reporting.
2175
2038
:param report_activity: Call this as bytes are read, see
2176
2039
Transport._report_activity
2179
2042
byte_count = len(bytes)
2180
view = memoryview(bytes)
2181
2043
while sent_total < byte_count:
2183
sent = sock.send(view[sent_total:sent_total + MAX_SOCKET_CHUNK])
2184
except (socket.error, IOError) as e:
2185
if e.args[0] in _end_of_stream_errors:
2186
raise errors.ConnectionReset(
2187
"Error trying to write to socket", e)
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2188
2047
if e.args[0] != errno.EINTR:
2192
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2194
2050
sent_total += sent
2195
if report_activity is not None:
2196
report_activity(sent, 'write')
2199
def connect_socket(address):
2200
# Slight variation of the socket.create_connection() function (provided by
2201
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2202
# provide it for previous python versions. Also, we don't use the timeout
2203
# parameter (provided by the python implementation) so we don't implement
2205
err = socket.error('getaddrinfo returns an empty list')
2206
host, port = address
2207
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2208
af, socktype, proto, canonname, sa = res
2211
sock = socket.socket(af, socktype, proto)
2215
except socket.error as e:
2217
# 'err' is now the most recent error
2218
if sock is not None:
2051
report_activity(sent, 'write')
2223
2054
def dereference_path(path):
2251
2082
If and when pkg_resources becomes a standard library, this routine
2252
2083
can delegate to it.
2254
# Check package name is within breezy
2255
if package == "breezy":
2085
# Check package name is within bzrlib
2086
if package == "bzrlib":
2256
2087
resource_relpath = resource_name
2257
elif package.startswith("breezy."):
2258
package = package[len("breezy."):].replace('.', os.sep)
2088
elif package.startswith("bzrlib."):
2089
package = package[len("bzrlib."):].replace('.', os.sep)
2259
2090
resource_relpath = pathjoin(package, resource_name)
2261
raise errors.BzrError('resource package %s not in breezy' % package)
2092
raise errors.BzrError('resource package %s not in bzrlib' % package)
2263
2094
# Map the resource to a file and read its contents
2264
base = dirname(breezy.__file__)
2095
base = dirname(bzrlib.__file__)
2265
2096
if getattr(sys, 'frozen', None): # bzr.exe
2266
2097
base = abspath(pathjoin(base, '..', '..'))
2267
with open(pathjoin(base, resource_relpath), "rt") as f:
2098
filename = pathjoin(base, resource_relpath)
2099
return open(filename, 'rU').read()
2271
2102
def file_kind_from_stat_mode_thunk(mode):
2272
2103
global file_kind_from_stat_mode
2273
2104
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2275
from ._readdir_pyx import UTF8DirReader
2106
from bzrlib._readdir_pyx import UTF8DirReader
2276
2107
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2108
except ImportError, e:
2278
2109
# This is one time where we won't warn that an extension failed to
2279
2110
# load. The extension is never available on Windows anyway.
2280
from ._readdir_py import (
2111
from bzrlib._readdir_py import (
2281
2112
_kind_from_mode as file_kind_from_stat_mode
2283
2114
return file_kind_from_stat_mode(mode)
2286
2115
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2289
def file_stat(f, _lstat=os.lstat):
2118
def file_kind(f, _lstat=os.lstat):
2293
except OSError as e:
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2294
2122
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2295
2123
raise errors.NoSuchFile(f)
2299
def file_kind(f, _lstat=os.lstat):
2300
stat_value = file_stat(f, _lstat)
2301
return file_kind_from_stat_mode(stat_value.st_mode)
2304
2127
def until_no_eintr(f, *a, **kw):
2305
2128
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2307
2130
WARNING: you must be certain that it is safe to retry the call repeatedly
2308
2131
if EINTR does occur. This is typically only true for low-level operations
2309
2132
like os.read. If in any doubt, don't use this.
2311
2134
Keep in mind that this is not a complete solution to EINTR. There is
2312
2135
probably code in the Python standard library and other dependencies that
2313
2136
may encounter EINTR if a signal arrives (and there is signal handler for
2314
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
2315
2138
directly controls, but it is not a complete solution.
2317
2140
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2320
2143
return f(*a, **kw)
2321
except (IOError, OSError) as e:
2144
except (IOError, OSError), e:
2322
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))
2327
2173
if sys.platform == "win32":
2330
2176
return msvcrt.getch()
2335
2181
fd = sys.stdin.fileno()
2336
2182
settings = termios.tcgetattr(fd)
2341
2187
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2344
if sys.platform.startswith('linux'):
2191
if sys.platform == 'linux2':
2345
2192
def _local_concurrency():
2347
return os.sysconf('SC_NPROCESSORS_ONLN')
2348
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
2350
2199
elif sys.platform == 'darwin':
2351
2200
def _local_concurrency():
2352
2201
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2353
2202
stdout=subprocess.PIPE).communicate()[0]
2354
elif "bsd" in sys.platform:
2203
elif sys.platform[0:7] == 'freebsd':
2355
2204
def _local_concurrency():
2356
2205
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2357
2206
stdout=subprocess.PIPE).communicate()[0]
2358
2207
elif sys.platform == 'sunos5':
2359
2208
def _local_concurrency():
2360
return subprocess.Popen(['psrinfo', '-p', ],
2209
return subprocess.Popen(['psrinfo', '-p',],
2361
2210
stdout=subprocess.PIPE).communicate()[0]
2362
2211
elif sys.platform == "win32":
2363
2212
def _local_concurrency():
2383
2231
if _cached_local_concurrency is not None and use_cache:
2384
2232
return _cached_local_concurrency
2386
concurrency = os.environ.get('BRZ_CONCURRENCY', None)
2234
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2387
2235
if concurrency is None:
2388
import multiprocessing
2390
concurrency = multiprocessing.cpu_count()
2391
except NotImplementedError:
2392
# multiprocessing.cpu_count() isn't implemented on all platforms
2394
concurrency = _local_concurrency()
2395
except (OSError, IOError):
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2398
2241
concurrency = int(concurrency)
2399
2242
except (TypeError, ValueError):
2400
2243
concurrency = 1
2402
_cached_local_concurrency = concurrency
2245
_cached_concurrency = concurrency
2403
2246
return concurrency
2460
2302
return os.fdopen(os.open(filename, flags), mode, bufsize)
2462
2304
open_file = open
2465
def available_backup_name(base, exists):
2466
"""Find a non-existing backup file name.
2468
This will *not* create anything, this only return a 'free' entry. This
2469
should be used for checking names in a directory below a locked
2470
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2471
Leap) and generally discouraged.
2473
:param base: The base name.
2475
:param exists: A callable returning True if the path parameter exists.
2478
name = "%s.~%d~" % (base, counter)
2481
name = "%s.~%d~" % (base, counter)
2485
def set_fd_cloexec(fd):
2486
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2487
support for this is not available.
2491
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2492
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2493
except (ImportError, AttributeError):
2494
# Either the fcntl module or specific constants are not present
2498
def find_executable_on_path(name):
2499
"""Finds an executable on the PATH.
2501
On Windows, this will try to append each extension in the PATHEXT
2502
environment variable to the name, if it cannot be found with the name
2505
:param name: The base name of the executable.
2506
:return: The path to the executable found or None.
2508
if sys.platform == 'win32':
2509
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2510
exts = [ext.lower() for ext in exts]
2511
base, ext = os.path.splitext(name)
2513
if ext.lower() not in exts:
2519
path = os.environ.get('PATH')
2520
if path is not None:
2521
path = path.split(os.pathsep)
2524
f = os.path.join(d, name) + ext
2525
if os.access(f, os.X_OK):
2527
if sys.platform == 'win32':
2528
app_path = win32utils.get_app_path(name)
2529
if app_path != name:
2534
def _posix_is_local_pid_dead(pid):
2535
"""True if pid doesn't correspond to live process on this machine"""
2537
# Special meaning of unix kill: just check if it's there.
2539
except OSError as e:
2540
if e.errno == errno.ESRCH:
2541
# On this machine, and really not found: as sure as we can be
2544
elif e.errno == errno.EPERM:
2545
# exists, though not ours
2548
trace.mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2549
# Don't really know.
2552
# Exists and our process: not dead.
2556
if sys.platform == "win32":
2557
is_local_pid_dead = win32utils.is_local_pid_dead
2559
is_local_pid_dead = _posix_is_local_pid_dead
2561
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2562
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2563
if getattr(errno, name, None) is not None]
2566
def fdatasync(fileno):
2567
"""Flush file contents to disk if possible.
2569
:param fileno: Integer OS file handle.
2570
:raises TransportNotPossible: If flushing to disk is not possible.
2572
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2576
except IOError as e:
2577
# See bug #1075108, on some platforms fdatasync exists, but can
2578
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2579
# and reduce the chance of corruption-on-powerloss situations. It
2580
# is not a mandatory call, so it is ok to suppress failures.
2581
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2582
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2586
def ensure_empty_directory_exists(path, exception_class):
2587
"""Make sure a local directory exists and is empty.
2589
If it does not exist, it is created. If it exists and is not empty, an
2590
instance of exception_class is raised.
2594
except OSError as e:
2595
if e.errno != errno.EEXIST:
2597
if os.listdir(path) != []:
2598
raise exception_class(path)
2601
def is_environment_error(evalue):
2602
"""True if exception instance is due to a process environment issue
2604
This includes OSError and IOError, but also other errors that come from
2605
the operating system or core libraries but are not subclasses of those.
2607
if isinstance(evalue, (EnvironmentError, select.error)):
2609
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):