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
# Cross platform wall-clock time functionality with decent resolution.
80
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
81
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
82
# synchronized with ``time.time()``, this is only meant to be used to find
83
# delta times by subtracting from another call to this function.
84
timer_func = time.time
85
if sys.platform == 'win32':
86
timer_func = time.clock
88
73
# On win32, O_BINARY is used to indicate the file should
89
74
# be opened in binary mode, rather than text mode.
96
81
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
84
class UnsupportedTimezoneFormat(errors.BzrError):
86
_fmt = ('Unsupported timezone format "%(timezone)s", '
87
'options are "utc", "original", "local".')
89
def __init__(self, timezone):
90
self.timezone = timezone
99
93
def get_unicode_argv():
101
97
user_encoding = get_user_encoding()
102
98
return [a.decode(user_encoding) for a in sys.argv[1:]]
103
99
except UnicodeDecodeError:
104
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
100
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
101
"application locale.").format(a, user_encoding))
108
104
def make_readonly(filename):
109
105
"""Make a filename read-only."""
110
106
mod = os.lstat(filename).st_mode
111
107
if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
109
chmod_if_possible(filename, mod)
116
112
def make_writable(filename):
117
113
mod = os.lstat(filename).st_mode
118
114
if not stat.S_ISLNK(mod):
120
os.chmod(filename, mod)
116
chmod_if_possible(filename, mod)
119
def chmod_if_possible(filename, mode):
120
# Set file mode if that can be safely done.
121
# Sometimes even on unix the filesystem won't allow it - see
122
# https://bugs.launchpad.net/bzr/+bug/606537
124
# It is probably faster to just do the chmod, rather than
125
# doing a stat, and then trying to compare
126
os.chmod(filename, mode)
127
except (IOError, OSError) as e:
128
# Permission/access denied seems to commonly happen on smbfs; there's
129
# probably no point warning about it.
130
# <https://bugs.launchpad.net/bzr/+bug/606537>
131
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
132
trace.mutter("ignore error on chmod of %r: %r" % (
123
138
def minimum_path_selection(paths):
232
252
file_existed = False
234
254
rename_func(new, tmp_name)
235
except (errors.NoSuchFile,), e:
255
except (errors.NoSuchFile,):
238
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# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
239
259
# function raises an IOError with errno is None when a rename fails.
240
260
# This then gets caught here.
241
261
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
263
except Exception as e:
244
264
if (getattr(e, 'errno', None) is None
245
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
265
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
248
268
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)
272
# This may throw an exception, in which case success will
274
rename_func(old, new)
276
except (IOError, OSError) as e:
277
# source and target may be aliases of each other (e.g. on a
278
# case-insensitive filesystem), so we may have accidentally renamed
279
# source by when we tried to rename target
280
if (file_existed and e.errno in (None, errno.ENOENT)
264
281
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
282
# source and target are the same file on a case-insensitive
283
# filesystem, so we don't generate an exception
270
289
# If the file used to exist, rename it back into place
273
292
unlink_func(tmp_name)
275
294
rename_func(tmp_name, new)
276
if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
280
297
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
281
298
# choke on a Unicode string containing a relative path if
282
299
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
285
301
def _posix_abspath(path):
286
302
# jam 20060426 rather than encoding to fsencoding
287
303
# copy posixpath.abspath, but use os.getcwdu instead
288
304
if not posixpath.isabs(path):
289
305
path = posixpath.join(getcwd(), path)
290
return posixpath.normpath(path)
306
return _posix_normpath(path)
293
309
def _posix_realpath(path):
294
310
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
313
def _posix_normpath(path):
314
path = posixpath.normpath(path)
315
# Bug 861008: posixpath.normpath() returns a path normalized according to
316
# the POSIX standard, which stipulates (for compatibility reasons) that two
317
# leading slashes must not be simplified to one, and only if there are 3 or
318
# more should they be simplified as one. So we treat the leading 2 slashes
319
# as a special case here by simply removing the first slash, as we consider
320
# that breaking POSIX compatibility for this obscure feature is acceptable.
321
# This is not a paranoid precaution, as we notably get paths like this when
322
# the repo is hosted at the root of the filesystem, i.e. in "/".
323
if path.startswith('//'):
328
def _posix_path_from_environ(key):
329
"""Get unicode path from `key` in environment or None if not present
331
Note that posix systems use arbitrary byte strings for filesystem objects,
332
so a path that raises BadFilenameEncoding here may still be accessible.
334
val = os.environ.get(key, None)
335
if PY3 or val is None:
338
return val.decode(_fs_enc)
339
except UnicodeDecodeError:
340
# GZ 2011-12-12:Ideally want to include `key` in the exception message
341
raise errors.BadFilenameEncoding(val, _fs_enc)
344
def _posix_get_home_dir():
345
"""Get the home directory of the current user as a unicode path"""
346
path = posixpath.expanduser("~")
348
return path.decode(_fs_enc)
349
except AttributeError:
351
except UnicodeDecodeError:
352
raise errors.BadFilenameEncoding(path, _fs_enc)
355
def _posix_getuser_unicode():
356
"""Get username from environment or password database as unicode"""
357
name = getpass.getuser()
360
user_encoding = get_user_encoding()
362
return name.decode(user_encoding)
363
except UnicodeDecodeError:
364
raise errors.BzrError("Encoding of username %r is unsupported by %s "
365
"application locale." % (name, user_encoding))
297
368
def _win32_fixdrive(path):
298
369
"""Force drive letters to be consistent.
303
374
running python.exe under cmd.exe return capital C:\\
304
375
running win32 python inside a cygwin shell returns lowercase c:\\
306
drive, path = _nt_splitdrive(path)
377
drive, path = ntpath.splitdrive(path)
307
378
return drive.upper() + path
310
381
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('\\', '/'))
382
# Real ntpath.abspath doesn't have a problem with a unicode cwd
383
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
342
386
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('\\', '/'))
387
# Real ntpath.realpath doesn't have a problem with a unicode cwd
388
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
347
391
def _win32_pathjoin(*args):
348
return _nt_join(*args).replace('\\', '/')
392
return ntpath.join(*args).replace('\\', '/')
351
395
def _win32_normpath(path):
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
396
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
355
399
def _win32_getcwd():
356
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
400
return _win32_fixdrive(_getcwd().replace('\\', '/'))
359
403
def _win32_mkdtemp(*args, **kwargs):
360
404
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
407
def _win32_rename(old, new):
372
408
"""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
425
def _mac_getcwd():
400
return unicodedata.normalize('NFC', os.getcwdu())
426
return unicodedata.normalize('NFC', _getcwd())
429
def _rename_wrap_exception(rename_func):
430
"""Adds extra information to any exceptions that come from rename().
432
The exception has an updated message and 'old_filename' and 'new_filename'
436
def _rename_wrapper(old, new):
438
rename_func(old, new)
440
detailed_error = OSError(e.errno, e.strerror +
441
" [occurred when renaming '%s' to '%s']" %
443
detailed_error.old_filename = old
444
detailed_error.new_filename = new
447
return _rename_wrapper
450
if sys.version_info > (3,):
456
# Default rename wraps os.rename()
457
rename = _rename_wrap_exception(os.rename)
403
459
# Default is to just use the python builtins, but these can be rebound on
404
460
# particular platforms.
405
461
abspath = _posix_abspath
406
462
realpath = _posix_realpath
407
463
pathjoin = os.path.join
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
464
normpath = _posix_normpath
465
path_from_environ = _posix_path_from_environ
466
_get_home_dir = _posix_get_home_dir
467
getuser_unicode = _posix_getuser_unicode
411
469
dirname = os.path.dirname
412
470
basename = os.path.basename
413
471
split = os.path.split
414
472
splitext = os.path.splitext
415
# These were already imported into local scope
473
# These were already lazily imported into local scope
416
474
# mkdtemp = tempfile.mkdtemp
417
475
# rmtree = shutil.rmtree
419
484
MIN_ABS_PATHLENGTH = 1
422
487
if sys.platform == 'win32':
423
if win32utils.winver == 'Windows 98':
424
abspath = _win98_abspath
426
abspath = _win32_abspath
488
abspath = _win32_abspath
427
489
realpath = _win32_realpath
428
490
pathjoin = _win32_pathjoin
429
491
normpath = _win32_normpath
430
492
getcwd = _win32_getcwd
431
493
mkdtemp = _win32_mkdtemp
432
rename = _win32_rename
494
rename = _rename_wrap_exception(_win32_rename)
496
from . import _walkdirs_win32
500
lstat = _walkdirs_win32.lstat
501
fstat = _walkdirs_win32.fstat
502
wrap_stat = _walkdirs_win32.wrap_stat
434
504
MIN_ABS_PATHLENGTH = 3
471
542
On my standard US Windows XP, the preferred encoding is
472
543
cp1252, but the console is cp437
545
:param trace: If True trace the selected encoding via mutter().
474
from bzrlib.trace import mutter
547
from .trace import mutter
475
548
output_encoding = getattr(sys.stdout, 'encoding', None)
476
549
if not output_encoding:
477
550
input_encoding = getattr(sys.stdin, 'encoding', None)
478
551
if not input_encoding:
479
552
output_encoding = get_user_encoding()
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
554
mutter('encoding stdout as osutils.get_user_encoding() %r',
483
557
output_encoding = input_encoding
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
559
mutter('encoding stdout as sys.stdin encoding %r',
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
563
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
487
564
if output_encoding == 'cp0':
488
565
# invalid encoding (cp0 means 'no codepage' on Windows)
489
566
output_encoding = get_user_encoding()
490
mutter('cp0 is invalid encoding.'
491
' encoding stdout as osutils.get_user_encoding() %r',
568
mutter('cp0 is invalid encoding.'
569
' encoding stdout as osutils.get_user_encoding() %r',
495
573
codecs.lookup(output_encoding)
496
574
except LookupError:
497
sys.stderr.write('bzr: warning:'
575
sys.stderr.write('brz: warning:'
498
576
' unknown terminal encoding %s.\n'
499
577
' Using encoding %s instead.\n'
500
578
% (output_encoding, get_user_encoding())
502
580
output_encoding = get_user_encoding()
504
582
return output_encoding
857
954
plural_seconds = ''
859
956
plural_seconds = 's'
860
if minutes < 90: # print minutes, seconds up to 90 minutes
957
if minutes < 90: # print minutes, seconds up to 90 minutes
862
959
return '%d minute, %d second%s %s' % (
863
minutes, seconds, plural_seconds, direction)
960
minutes, seconds, plural_seconds, direction)
865
962
return '%d minutes, %d second%s %s' % (
866
minutes, seconds, plural_seconds, direction)
963
minutes, seconds, plural_seconds, direction)
868
965
hours = int(minutes / 60)
869
966
minutes -= 60 * hours
878
975
return '%d hours, %d minute%s %s' % (hours, minutes,
879
976
plural_minutes, direction)
882
980
"""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
981
return os.fstat(f.fileno())[stat.ST_SIZE]
984
# Alias os.urandom to support platforms (which?) without /dev/urandom and
985
# override if it doesn't work. Avoid checking on windows where there is
986
# significant initialisation cost that can be avoided for some bzr calls.
988
rand_bytes = os.urandom
990
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):
993
except NotImplementedError:
899
994
# not well seeded, but better than nothing
900
995
def rand_bytes(n):
917
1014
for raw_byte in rand_bytes(num):
918
s += ALNUM[ord(raw_byte) % 36]
1016
s += ALNUM[ord(raw_byte) % 36]
1018
s += ALNUM[raw_byte % 36]
922
## TODO: We could later have path objects that remember their list
923
## decomposition (might be too tricksy though.)
1022
# TODO: We could later have path objects that remember their list
1023
# decomposition (might be too tricksy though.)
925
1025
def splitpath(p):
926
1026
"""Turn string into list of parts."""
927
# split on either delimiter because people might use either on
929
ps = re.split(r'[\\/]', p)
1027
if os.path.sep == '\\':
1028
# split on either delimiter because people might use either on
1030
if isinstance(p, bytes):
1031
ps = re.split(b'[\\\\/]', p)
1033
ps = re.split(r'[\\/]', p)
1035
if isinstance(p, bytes):
934
raise errors.BzrError("sorry, %r not allowed in path" % f)
935
elif (f == '.') or (f == ''):
1042
if f in ('..', b'..'):
1043
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1044
elif f in ('.', '', b'.', b''):
970
1079
implementation should be loaded instead::
973
>>> import bzrlib._fictional_extension_pyx
1082
>>> import breezy._fictional_extension_pyx
974
1083
>>> except ImportError, e:
975
>>> bzrlib.osutils.failed_to_load_extension(e)
976
>>> import bzrlib._fictional_extension_py
1084
>>> breezy.osutils.failed_to_load_extension(e)
1085
>>> import breezy._fictional_extension_py
978
1087
# NB: This docstring is just an example, not a doctest, because doctest
979
1088
# currently can't cope with the use of lazy imports in this namespace --
982
1091
# This currently doesn't report the failure at the time it occurs, because
983
1092
# they tend to happen very early in startup when we can't check config
984
1093
# files etc, and also we want to report all failures but not spam the user
985
1094
# with 10 warnings.
986
from bzrlib import trace
987
1095
exception_str = str(exception)
988
1096
if exception_str not in _extension_load_failures:
989
1097
trace.mutter("failed to load compiled extension: %s" % exception_str)
993
1101
def report_extension_load_failures():
994
1102
if not _extension_load_failures:
996
from bzrlib.config import GlobalConfig
997
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1104
if config.GlobalConfig().suppress_warning('missing_extensions'):
999
1106
# the warnings framework should by default show this only once
1000
from bzrlib.trace import warning
1107
from .trace import warning
1002
"bzr: warning: some compiled extensions could not be loaded; "
1003
"see <https://answers.launchpad.net/bzr/+faq/703>")
1109
"brz: warning: some compiled extensions could not be loaded; "
1110
"see ``brz help missing-extensions``")
1004
1111
# we no longer show the specific missing extensions here, because it makes
1005
1112
# the message too long and scary - see
1006
1113
# https://bugs.launchpad.net/bzr/+bug/430529
1010
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1011
except ImportError, e:
1117
from ._chunks_to_lines_pyx import chunks_to_lines
1118
except ImportError as e:
1012
1119
failed_to_load_extension(e)
1013
from bzrlib._chunks_to_lines_py import chunks_to_lines
1120
from ._chunks_to_lines_py import chunks_to_lines
1016
1123
def split_lines(s):
1017
1124
"""Split s into lines, but without removing the newline characters."""
1018
1125
# Trivially convert a fulltext into a 'chunked' representation, and let
1019
1126
# chunks_to_lines do the heavy lifting.
1020
if isinstance(s, str):
1127
if isinstance(s, bytes):
1021
1128
# chunks_to_lines only supports 8-bit strings
1022
1129
return chunks_to_lines([s])
1049
1157
os.link(src, dest)
1050
except (OSError, IOError), e:
1158
except (OSError, IOError) as e:
1051
1159
if e.errno != errno.EXDEV:
1053
1161
shutil.copyfile(src, dest)
1056
1164
def delete_any(path):
1057
"""Delete a file, symlink or directory.
1165
"""Delete a file, symlink or directory.
1059
1167
Will delete even if readonly.
1062
_delete_file_or_dir(path)
1063
except (OSError, IOError), e:
1170
_delete_file_or_dir(path)
1171
except (OSError, IOError) as e:
1064
1172
if e.errno in (errno.EPERM, errno.EACCES):
1065
1173
# make writable and try again
1250
1360
# but for now, we haven't optimized...
1251
1361
return [canonical_relpath(base, p) for p in paths]
1364
def decode_filename(filename):
1365
"""Decode the filename using the filesystem encoding
1367
If it is unicode, it is returned.
1368
Otherwise it is decoded from the the filesystem's encoding. If decoding
1369
fails, a errors.BadFilenameEncoding exception is raised.
1371
if isinstance(filename, text_type):
1374
return filename.decode(_fs_enc)
1375
except UnicodeDecodeError:
1376
raise errors.BadFilenameEncoding(filename, _fs_enc)
1253
1379
def safe_unicode(unicode_or_utf8_string):
1254
1380
"""Coerce unicode_or_utf8_string into unicode.
1284
1410
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):
1413
def safe_revision_id(unicode_or_utf8_string):
1293
1414
"""Revision ids should now be utf8, but at one point they were unicode.
1295
1416
: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
1418
:return: None or a utf8 revision id.
1300
1420
if (unicode_or_utf8_string is None
1301
or unicode_or_utf8_string.__class__ == str):
1421
or unicode_or_utf8_string.__class__ == bytes):
1302
1422
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):
1423
raise TypeError('Unicode revision ids are no longer supported. '
1424
'Revision id generators should be creating utf8 revision '
1428
def safe_file_id(unicode_or_utf8_string):
1314
1429
"""File ids should now be utf8, but at one point they were unicode.
1316
1431
This is the same as safe_utf8, except it uses the cached encode functions
1358
1470
can be accessed by that path.
1361
return unicodedata.normalize('NFC', unicode(path)), True
1473
if isinstance(path, bytes):
1474
path = path.decode(sys.getfilesystemencoding())
1475
return unicodedata.normalize('NFC', path), True
1364
1478
def _inaccessible_normalized_filename(path):
1365
1479
__doc__ = _accessible_normalized_filename.__doc__
1367
normalized = unicodedata.normalize('NFC', unicode(path))
1481
if isinstance(path, bytes):
1482
path = path.decode(sys.getfilesystemencoding())
1483
normalized = unicodedata.normalize('NFC', path)
1368
1484
return normalized, normalized == path
1424
1547
None is returned if the width can't established precisely.
1427
- if BZR_COLUMNS is set, returns its value
1550
- if BRZ_COLUMNS is set, returns its value
1428
1551
- if there is no controlling terminal, returns None
1552
- query the OS, if the queried size has changed since the last query,
1429
1554
- if COLUMNS is set, returns its value,
1555
- if the OS has a value (even though it's never changed), return its value.
1431
1557
From there, we need to query the OS to get the size of the controlling
1560
On Unices we query the OS by:
1435
1561
- get termios.TIOCGWINSZ
1436
1562
- if an error occurs or a negative value is obtained, returns None
1564
On Windows we query the OS by:
1440
1565
- win32utils.get_console_size() decides,
1441
1566
- returns None on error (provided default value)
1568
# Note to implementors: if changing the rules for determining the width,
1569
# make sure you've considered the behaviour in these cases:
1570
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1571
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1573
# - (add more interesting cases here, if you find any)
1574
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1575
# but we don't want to register a signal handler because it is impossible
1576
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1577
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1578
# 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
1581
# If BRZ_COLUMNS is set, take it, user is always right
1582
# Except if they specified 0 in which case, impose no limit here
1446
return int(os.environ['BZR_COLUMNS'])
1584
width = int(os.environ['BRZ_COLUMNS'])
1447
1585
except (KeyError, ValueError):
1587
if width is not None:
1450
1593
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.
1594
if isatty is None or not isatty():
1595
# 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))
1599
width, height = os_size = _terminal_size(None, None)
1600
global _first_terminal_size, _terminal_size_state
1601
if _terminal_size_state == 'no_data':
1602
_first_terminal_size = os_size
1603
_terminal_size_state = 'unchanged'
1604
elif (_terminal_size_state == 'unchanged' and
1605
_first_terminal_size != os_size):
1606
_terminal_size_state = 'changed'
1608
# If the OS claims to know how wide the terminal is, and this value has
1609
# ever changed, use that.
1610
if _terminal_size_state == 'changed':
1611
if width is not None and width > 0:
1614
# If COLUMNS is set, use it.
1459
1616
return int(os.environ['COLUMNS'])
1460
1617
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1620
# Finally, use an unchanged size from the OS, if we have one.
1621
if _terminal_size_state == 'unchanged':
1622
if width is not None and width > 0:
1625
# The width could not be determined.
1471
1629
def _win32_terminal_size(width, height):
1472
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1630
width, height = win32utils.get_console_size(
1631
defaultx=width, defaulty=height)
1473
1632
return width, height
1476
1635
def _ioctl_terminal_size(width, height):
1478
import struct, fcntl, termios
1479
1640
s = struct.pack('HHHH', 0, 0, 0, 0)
1480
1641
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1481
1642
height, width = struct.unpack('HHHH', x)[0:2]
1498
1660
_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
1663
def supports_executable():
1527
1664
return sys.platform != "win32"
1712
1850
global _selected_dir_reader
1713
1851
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
1852
if sys.platform == "win32":
1722
from bzrlib._walkdirs_win32 import Win32ReadDir
1854
from ._walkdirs_win32 import Win32ReadDir
1723
1855
_selected_dir_reader = Win32ReadDir()
1724
1856
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
1858
elif _fs_enc in ('utf-8', 'ascii'):
1729
from bzrlib._readdir_pyx import UTF8DirReader
1860
from ._readdir_pyx import UTF8DirReader
1730
1861
_selected_dir_reader = UTF8DirReader()
1731
except ImportError, e:
1862
except ImportError as e:
1732
1863
failed_to_load_extension(e)
1779
1910
See DirReader.read_dir for details.
1781
1912
_utf8_encode = self._utf8_encode
1914
def _fs_decode(s): return s.decode(_fs_enc)
1916
def _fs_encode(s): return s.encode(_fs_enc)
1782
1917
_lstat = os.lstat
1783
1918
_listdir = os.listdir
1784
1919
_kind_from_mode = file_kind_from_stat_mode
1787
relprefix = prefix + '/'
1922
relprefix = prefix + b'/'
1790
top_slash = top + u'/'
1925
top_slash = top + '/'
1793
1928
append = dirblock.append
1794
for name in sorted(_listdir(top)):
1929
for name_native in _listdir(top.encode('utf-8')):
1796
name_utf8 = _utf8_encode(name)[0]
1931
name = _fs_decode(name_native)
1797
1932
except UnicodeDecodeError:
1798
1933
raise errors.BadFilenameEncoding(
1799
_utf8_encode(relprefix)[0] + name, _fs_enc)
1934
relprefix + name_native, _fs_enc)
1935
name_utf8 = _utf8_encode(name)[0]
1800
1936
abspath = top_slash + name
1801
1937
statvalue = _lstat(abspath)
1802
1938
kind = _kind_from_mode(statvalue.st_mode)
1803
1939
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1940
return sorted(dirblock)
1807
1943
def copy_tree(from_path, to_path, handlers={}):
1874
2013
This can be used to sort paths in the same way that walkdirs does.
1876
return (dirname(path) , path)
2015
return (dirname(path), path)
1879
2018
def compare_paths_prefix_order(path_a, path_b):
1880
2019
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1881
2020
key_a = path_prefix_key(path_a)
1882
2021
key_b = path_prefix_key(path_b)
1883
return cmp(key_a, key_b)
2022
return (key_a > key_b) - (key_a < key_b)
1886
2025
_cached_user_encoding = None
1889
def get_user_encoding(use_cache=True):
2028
def get_user_encoding():
1890
2029
"""Find out what the preferred user encoding is.
1892
2031
This is generally the encoding that is used for command line parameters
1893
2032
and file contents. This may be different from the terminal encoding
1894
2033
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
2035
:return: A string defining the preferred user encoding
1902
2037
global _cached_user_encoding
1903
if _cached_user_encoding is not None and use_cache:
2038
if _cached_user_encoding is not None:
1904
2039
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'
2041
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2042
# Use the existing locale settings and call nl_langinfo directly
2043
# rather than going through getpreferredencoding. This avoids
2044
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2045
# possibility of the setlocale call throwing an error.
2046
user_encoding = locale.nl_langinfo(locale.CODESET)
2048
# GZ 2011-12-19: On windows could call GetACP directly instead.
2049
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:'
2052
user_encoding = codecs.lookup(user_encoding).name
2054
if user_encoding not in ("", "cp0"):
2055
sys.stderr.write('brz: warning:'
1950
2056
' unknown encoding %s.'
1951
2057
' Continuing with ascii encoding.\n'
1952
2058
% user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = user_encoding
2060
user_encoding = 'ascii'
2062
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2063
if user_encoding == 'ascii':
2064
if sys.platform == 'darwin':
2065
# OSX is special-cased in Python to have a UTF-8 filesystem
2066
# encoding and previously had LANG set here if not present.
2067
user_encoding = 'utf-8'
2068
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2069
# for some other posix platforms as well.
2071
_cached_user_encoding = user_encoding
1959
2072
return user_encoding
2075
def get_diff_header_encoding():
2076
return get_terminal_encoding()
1962
2079
def get_host_name():
1963
2080
"""Return the current unicode host name.
1979
2097
# data at once.
1980
2098
MAX_SOCKET_CHUNK = 64 * 1024
2100
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2101
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2102
_eno = getattr(errno, _eno, None)
2103
if _eno is not None:
2104
_end_of_stream_errors.append(_eno)
1982
2108
def read_bytes_from_socket(sock, report_activity=None,
1983
max_read_size=MAX_SOCKET_CHUNK):
2109
max_read_size=MAX_SOCKET_CHUNK):
1984
2110
"""Read up to max_read_size of bytes from sock and notify of progress.
1986
2112
Translates "Connection reset by peer" into file-like EOF (return an
1987
2113
empty string rather than raise an error), and repeats the recv if
1988
2114
interrupted by a signal.
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
2118
data = sock.recv(max_read_size)
2119
except socket.error as e:
1994
2120
eno = e.args[0]
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2121
if eno in _end_of_stream_errors:
1996
2122
# The connection was closed by the other side. Callers expect
1997
2123
# an empty string to signal end-of-stream.
1999
2125
elif eno == errno.EINTR:
2000
2126
# Retry the interrupted recv.
2004
2130
if report_activity is not None:
2005
report_activity(len(bytes), 'read')
2131
report_activity(len(data), 'read')
2009
2135
def recv_all(socket, count):
2017
2143
This isn't optimized and is intended mostly for use in testing.
2020
2146
while len(b) < count:
2021
2147
new = read_bytes_from_socket(socket, None, count - len(b))
2028
2154
def send_all(sock, bytes, report_activity=None):
2029
2155
"""Send all bytes on a socket.
2031
2157
Breaks large blocks in smaller chunks to avoid buffering limitations on
2032
2158
some platforms, and catches EINTR which may be thrown if the send is
2033
2159
interrupted by a signal.
2035
2161
This is preferred to socket.sendall(), because it avoids portability bugs
2036
2162
and provides activity reporting.
2038
2164
:param report_activity: Call this as bytes are read, see
2039
2165
Transport._report_activity
2042
2168
byte_count = len(bytes)
2169
view = memoryview(bytes)
2043
2170
while sent_total < byte_count:
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2172
sent = sock.send(view[sent_total:sent_total + MAX_SOCKET_CHUNK])
2173
except (socket.error, IOError) as e:
2174
if e.args[0] in _end_of_stream_errors:
2175
raise errors.ConnectionReset(
2176
"Error trying to write to socket", e)
2047
2177
if e.args[0] != errno.EINTR:
2181
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2050
2183
sent_total += sent
2051
report_activity(sent, 'write')
2184
if report_activity is not None:
2185
report_activity(sent, 'write')
2188
def connect_socket(address):
2189
# Slight variation of the socket.create_connection() function (provided by
2190
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2191
# provide it for previous python versions. Also, we don't use the timeout
2192
# parameter (provided by the python implementation) so we don't implement
2194
err = socket.error('getaddrinfo returns an empty list')
2195
host, port = address
2196
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2197
af, socktype, proto, canonname, sa = res
2200
sock = socket.socket(af, socktype, proto)
2204
except socket.error as e:
2206
# 'err' is now the most recent error
2207
if sock is not None:
2054
2212
def dereference_path(path):
2082
2240
If and when pkg_resources becomes a standard library, this routine
2083
2241
can delegate to it.
2085
# Check package name is within bzrlib
2086
if package == "bzrlib":
2243
# Check package name is within breezy
2244
if package == "breezy":
2087
2245
resource_relpath = resource_name
2088
elif package.startswith("bzrlib."):
2089
package = package[len("bzrlib."):].replace('.', os.sep)
2246
elif package.startswith("breezy."):
2247
package = package[len("breezy."):].replace('.', os.sep)
2090
2248
resource_relpath = pathjoin(package, resource_name)
2092
raise errors.BzrError('resource package %s not in bzrlib' % package)
2250
raise errors.BzrError('resource package %s not in breezy' % package)
2094
2252
# Map the resource to a file and read its contents
2095
base = dirname(bzrlib.__file__)
2253
base = dirname(breezy.__file__)
2096
2254
if getattr(sys, 'frozen', None): # bzr.exe
2097
2255
base = abspath(pathjoin(base, '..', '..'))
2098
filename = pathjoin(base, resource_relpath)
2099
return open(filename, 'rU').read()
2256
with open(pathjoin(base, resource_relpath), "rt") as f:
2102
2260
def file_kind_from_stat_mode_thunk(mode):
2103
2261
global file_kind_from_stat_mode
2104
2262
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2106
from bzrlib._readdir_pyx import UTF8DirReader
2264
from ._readdir_pyx import UTF8DirReader
2107
2265
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2108
except ImportError, e:
2109
2267
# This is one time where we won't warn that an extension failed to
2110
2268
# load. The extension is never available on Windows anyway.
2111
from bzrlib._readdir_py import (
2269
from ._readdir_py import (
2112
2270
_kind_from_mode as file_kind_from_stat_mode
2114
2272
return file_kind_from_stat_mode(mode)
2115
2275
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2278
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2282
except OSError as e:
2122
2283
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2284
raise errors.NoSuchFile(f)
2288
def file_kind(f, _lstat=os.lstat):
2289
stat_value = file_stat(f, _lstat)
2290
return file_kind_from_stat_mode(stat_value.st_mode)
2127
2293
def until_no_eintr(f, *a, **kw):
2128
2294
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2296
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2297
if EINTR does occur. This is typically only true for low-level operations
2132
2298
like os.read. If in any doubt, don't use this.
2134
2300
Keep in mind that this is not a complete solution to EINTR. There is
2135
2301
probably code in the Python standard library and other dependencies that
2136
2302
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
2303
that signal). So this function can reduce the impact for IO that breezy
2138
2304
directly controls, but it is not a complete solution.
2140
2306
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2143
2309
return f(*a, **kw)
2144
except (IOError, OSError), e:
2310
except (IOError, OSError) as e:
2145
2311
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
2316
if sys.platform == "win32":
2176
2319
return msvcrt.getch()
2181
2324
fd = sys.stdin.fileno()
2182
2325
settings = termios.tcgetattr(fd)
2187
2330
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2333
if sys.platform.startswith('linux'):
2192
2334
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
2336
return os.sysconf('SC_NPROCESSORS_ONLN')
2337
except (ValueError, OSError, AttributeError):
2199
2339
elif sys.platform == 'darwin':
2200
2340
def _local_concurrency():
2201
2341
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2342
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2343
elif "bsd" in sys.platform:
2204
2344
def _local_concurrency():
2205
2345
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2346
stdout=subprocess.PIPE).communicate()[0]
2207
2347
elif sys.platform == 'sunos5':
2208
2348
def _local_concurrency():
2209
return subprocess.Popen(['psrinfo', '-p',],
2349
return subprocess.Popen(['psrinfo', '-p', ],
2210
2350
stdout=subprocess.PIPE).communicate()[0]
2211
2351
elif sys.platform == "win32":
2212
2352
def _local_concurrency():
2231
2372
if _cached_local_concurrency is not None and use_cache:
2232
2373
return _cached_local_concurrency
2234
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2375
concurrency = os.environ.get('BRZ_CONCURRENCY', None)
2235
2376
if concurrency is None:
2377
import multiprocessing
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2379
concurrency = multiprocessing.cpu_count()
2380
except NotImplementedError:
2381
# multiprocessing.cpu_count() isn't implemented on all platforms
2383
concurrency = _local_concurrency()
2384
except (OSError, IOError):
2241
2387
concurrency = int(concurrency)
2242
2388
except (TypeError, ValueError):
2243
2389
concurrency = 1
2245
_cached_concurrency = concurrency
2391
_cached_local_concurrency = concurrency
2246
2392
return concurrency
2302
2449
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2451
open_file = open
2454
def available_backup_name(base, exists):
2455
"""Find a non-existing backup file name.
2457
This will *not* create anything, this only return a 'free' entry. This
2458
should be used for checking names in a directory below a locked
2459
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2460
Leap) and generally discouraged.
2462
:param base: The base name.
2464
:param exists: A callable returning True if the path parameter exists.
2467
name = "%s.~%d~" % (base, counter)
2470
name = "%s.~%d~" % (base, counter)
2474
def set_fd_cloexec(fd):
2475
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2476
support for this is not available.
2480
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2481
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2482
except (ImportError, AttributeError):
2483
# Either the fcntl module or specific constants are not present
2487
def find_executable_on_path(name):
2488
"""Finds an executable on the PATH.
2490
On Windows, this will try to append each extension in the PATHEXT
2491
environment variable to the name, if it cannot be found with the name
2494
:param name: The base name of the executable.
2495
:return: The path to the executable found or None.
2497
if sys.platform == 'win32':
2498
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2499
exts = [ext.lower() for ext in exts]
2500
base, ext = os.path.splitext(name)
2502
if ext.lower() not in exts:
2508
path = os.environ.get('PATH')
2509
if path is not None:
2510
path = path.split(os.pathsep)
2513
f = os.path.join(d, name) + ext
2514
if os.access(f, os.X_OK):
2516
if sys.platform == 'win32':
2517
app_path = win32utils.get_app_path(name)
2518
if app_path != name:
2523
def _posix_is_local_pid_dead(pid):
2524
"""True if pid doesn't correspond to live process on this machine"""
2526
# Special meaning of unix kill: just check if it's there.
2528
except OSError as e:
2529
if e.errno == errno.ESRCH:
2530
# On this machine, and really not found: as sure as we can be
2533
elif e.errno == errno.EPERM:
2534
# exists, though not ours
2537
trace.mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2538
# Don't really know.
2541
# Exists and our process: not dead.
2545
if sys.platform == "win32":
2546
is_local_pid_dead = win32utils.is_local_pid_dead
2548
is_local_pid_dead = _posix_is_local_pid_dead
2550
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2551
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2552
if getattr(errno, name, None) is not None]
2555
def fdatasync(fileno):
2556
"""Flush file contents to disk if possible.
2558
:param fileno: Integer OS file handle.
2559
:raises TransportNotPossible: If flushing to disk is not possible.
2561
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2565
except IOError as e:
2566
# See bug #1075108, on some platforms fdatasync exists, but can
2567
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2568
# and reduce the chance of corruption-on-powerloss situations. It
2569
# is not a mandatory call, so it is ok to suppress failures.
2570
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2571
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2575
def ensure_empty_directory_exists(path, exception_class):
2576
"""Make sure a local directory exists and is empty.
2578
If it does not exist, it is created. If it exists and is not empty, an
2579
instance of exception_class is raised.
2583
except OSError as e:
2584
if e.errno != errno.EEXIST:
2586
if os.listdir(path) != []:
2587
raise exception_class(path)
2590
def is_environment_error(evalue):
2591
"""True if exception instance is due to a process environment issue
2593
This includes OSError and IOError, but also other errors that come from
2594
the operating system or core libraries but are not subclasses of those.
2596
if isinstance(evalue, (EnvironmentError, select.error)):
2598
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
2604
perf_counter = time.perf_counter
2606
perf_counter = time.clock
added
removed
breezy/osutils.py
