48
136
# TODO: I'm not really sure this is the best format either.x
51
_QUOTE_RE = re.compile(r'([^a-zA-Z0-9.,:/_~-])')
138
if _QUOTE_RE is None:
139
_QUOTE_RE = re.compile(r'([^a-zA-Z0-9.,:/\\_~-])')
53
141
if _QUOTE_RE.search(f):
54
142
return '"' + f + '"'
60
mode = os.lstat(f)[ST_MODE]
68
raise BzrError("can't handle file kind with mode %o of %r" % (mode, f))
147
_directory_kind = 'directory'
150
"""Return the current umask"""
151
# Assume that people aren't messing with the umask while running
152
# XXX: This is not thread safe, but there is no way to get the
153
# umask without setting it
161
_directory_kind: "/",
163
'tree-reference': '+',
71
167
def kind_marker(kind):
74
elif kind == 'directory':
76
elif kind == 'symlink':
79
raise BzrError('invalid file kind %r' % kind)
84
"""Copy a file to a backup.
86
Backups are named in GNU-style, with a ~ suffix.
88
If the file is already a backup, it's not copied.
101
outf = file(bfn, 'wb')
107
def rename(path_from, path_to):
108
"""Basically the same as os.rename() just special for win32"""
109
if sys.platform == 'win32':
169
return _kind_marker_map[kind]
171
raise errors.BzrError('invalid file kind %r' % kind)
174
lexists = getattr(os.path, 'lexists', None)
178
stat = getattr(os, 'lstat', os.stat)
112
181
except OSError, e:
113
if e.errno != e.ENOENT:
182
if e.errno == errno.ENOENT:
185
raise errors.BzrError("lstat/stat of (%r): %r" % (f, e))
188
def fancy_rename(old, new, rename_func, unlink_func):
189
"""A fancy rename, when you don't have atomic rename.
191
:param old: The old path, to rename from
192
:param new: The new path, to rename to
193
:param rename_func: The potentially non-atomic rename function
194
:param unlink_func: A way to delete the target file if the full rename succeeds
197
# sftp rename doesn't allow overwriting, so play tricks:
198
base = os.path.basename(new)
199
dirname = os.path.dirname(new)
200
tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(), os.getpid(), rand_chars(10))
201
tmp_name = pathjoin(dirname, tmp_name)
203
# Rename the file out of the way, but keep track if it didn't exist
204
# We don't want to grab just any exception
205
# something like EACCES should prevent us from continuing
206
# The downside is that the rename_func has to throw an exception
207
# with an errno = ENOENT, or NoSuchFile
210
rename_func(new, tmp_name)
211
except (errors.NoSuchFile,), e:
214
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
215
# function raises an IOError with errno is None when a rename fails.
216
# This then gets caught here.
217
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
220
if (getattr(e, 'errno', None) is None
221
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
229
# This may throw an exception, in which case success will
231
rename_func(old, new)
233
except (IOError, OSError), e:
234
# source and target may be aliases of each other (e.g. on a
235
# case-insensitive filesystem), so we may have accidentally renamed
236
# source by when we tried to rename target
237
if not (file_existed and e.errno in (None, errno.ENOENT)):
115
os.rename(path_from, path_to)
241
# If the file used to exist, rename it back into place
242
# otherwise just delete it from the tmp location
244
unlink_func(tmp_name)
246
rename_func(tmp_name, new)
249
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
250
# choke on a Unicode string containing a relative path if
251
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
253
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
254
def _posix_abspath(path):
255
# jam 20060426 rather than encoding to fsencoding
256
# copy posixpath.abspath, but use os.getcwdu instead
257
if not posixpath.isabs(path):
258
path = posixpath.join(getcwd(), path)
259
return posixpath.normpath(path)
262
def _posix_realpath(path):
263
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
266
def _win32_fixdrive(path):
267
"""Force drive letters to be consistent.
269
win32 is inconsistent whether it returns lower or upper case
270
and even if it was consistent the user might type the other
271
so we force it to uppercase
272
running python.exe under cmd.exe return capital C:\\
273
running win32 python inside a cygwin shell returns lowercase c:\\
275
drive, path = _nt_splitdrive(path)
276
return drive.upper() + path
279
def _win32_abspath(path):
280
# Real _nt_abspath doesn't have a problem with a unicode cwd
281
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
284
def _win98_abspath(path):
285
"""Return the absolute version of a path.
286
Windows 98 safe implementation (python reimplementation
287
of Win32 API function GetFullPathNameW)
292
# \\HOST\path => //HOST/path
293
# //HOST/path => //HOST/path
294
# path => C:/cwd/path
297
# check for absolute path
298
drive = _nt_splitdrive(path)[0]
299
if drive == '' and path[:2] not in('//','\\\\'):
301
# we cannot simply os.path.join cwd and path
302
# because os.path.join('C:','/path') produce '/path'
303
# and this is incorrect
304
if path[:1] in ('/','\\'):
305
cwd = _nt_splitdrive(cwd)[0]
307
path = cwd + '\\' + path
308
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
311
def _win32_realpath(path):
312
# Real _nt_realpath doesn't have a problem with a unicode cwd
313
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
316
def _win32_pathjoin(*args):
317
return _nt_join(*args).replace('\\', '/')
320
def _win32_normpath(path):
321
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
325
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
328
def _win32_mkdtemp(*args, **kwargs):
329
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
332
def _win32_rename(old, new):
333
"""We expect to be able to atomically replace 'new' with old.
335
On win32, if new exists, it must be moved out of the way first,
339
fancy_rename(old, new, rename_func=os.rename, unlink_func=os.unlink)
341
if e.errno in (errno.EPERM, errno.EACCES, errno.EBUSY, errno.EINVAL):
342
# If we try to rename a non-existant file onto cwd, we get
343
# EPERM or EACCES instead of ENOENT, this will raise ENOENT
344
# if the old path doesn't exist, sometimes we get EACCES
345
# On Linux, we seem to get EBUSY, on Mac we get EINVAL
351
return unicodedata.normalize('NFC', os.getcwdu())
354
# Default is to just use the python builtins, but these can be rebound on
355
# particular platforms.
356
abspath = _posix_abspath
357
realpath = _posix_realpath
358
pathjoin = os.path.join
359
normpath = os.path.normpath
362
dirname = os.path.dirname
363
basename = os.path.basename
364
split = os.path.split
365
splitext = os.path.splitext
366
# These were already imported into local scope
367
# mkdtemp = tempfile.mkdtemp
368
# rmtree = shutil.rmtree
370
MIN_ABS_PATHLENGTH = 1
373
if sys.platform == 'win32':
374
if win32utils.winver == 'Windows 98':
375
abspath = _win98_abspath
377
abspath = _win32_abspath
378
realpath = _win32_realpath
379
pathjoin = _win32_pathjoin
380
normpath = _win32_normpath
381
getcwd = _win32_getcwd
382
mkdtemp = _win32_mkdtemp
383
rename = _win32_rename
385
MIN_ABS_PATHLENGTH = 3
387
def _win32_delete_readonly(function, path, excinfo):
388
"""Error handler for shutil.rmtree function [for win32]
389
Helps to remove files and dirs marked as read-only.
391
exception = excinfo[1]
392
if function in (os.remove, os.rmdir) \
393
and isinstance(exception, OSError) \
394
and exception.errno == errno.EACCES:
400
def rmtree(path, ignore_errors=False, onerror=_win32_delete_readonly):
401
"""Replacer for shutil.rmtree: could remove readonly dirs/files"""
402
return shutil.rmtree(path, ignore_errors, onerror)
404
f = win32utils.get_unicode_argv # special function or None
408
elif sys.platform == 'darwin':
412
def get_terminal_encoding():
413
"""Find the best encoding for printing to the screen.
415
This attempts to check both sys.stdout and sys.stdin to see
416
what encoding they are in, and if that fails it falls back to
417
osutils.get_user_encoding().
418
The problem is that on Windows, locale.getpreferredencoding()
419
is not the same encoding as that used by the console:
420
http://mail.python.org/pipermail/python-list/2003-May/162357.html
422
On my standard US Windows XP, the preferred encoding is
423
cp1252, but the console is cp437
425
from bzrlib.trace import mutter
426
output_encoding = getattr(sys.stdout, 'encoding', None)
427
if not output_encoding:
428
input_encoding = getattr(sys.stdin, 'encoding', None)
429
if not input_encoding:
430
output_encoding = get_user_encoding()
431
mutter('encoding stdout as osutils.get_user_encoding() %r',
434
output_encoding = input_encoding
435
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
437
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
438
if output_encoding == 'cp0':
439
# invalid encoding (cp0 means 'no codepage' on Windows)
440
output_encoding = get_user_encoding()
441
mutter('cp0 is invalid encoding.'
442
' encoding stdout as osutils.get_user_encoding() %r',
446
codecs.lookup(output_encoding)
448
sys.stderr.write('bzr: warning:'
449
' unknown terminal encoding %s.\n'
450
' Using encoding %s instead.\n'
451
% (output_encoding, get_user_encoding())
453
output_encoding = get_user_encoding()
455
return output_encoding
458
def normalizepath(f):
459
if getattr(os.path, 'realpath', None) is not None:
463
[p,e] = os.path.split(f)
464
if e == "" or e == "." or e == "..":
467
return pathjoin(F(p), e)
366
682
def local_time_offset(t=None):
367
683
"""Return offset of local zone from GMT, either at present or at time t."""
368
# python2.3 localtime() can't take None
372
if time.localtime(t).tm_isdst and time.daylight:
375
return -time.timezone
378
def format_date(t, offset=0, timezone='original'):
379
## TODO: Perhaps a global option to use either universal or local time?
380
## Or perhaps just let people set $TZ?
381
assert isinstance(t, float)
686
offset = datetime.fromtimestamp(t) - datetime.utcfromtimestamp(t)
687
return offset.days * 86400 + offset.seconds
689
weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
691
def format_date(t, offset=0, timezone='original', date_fmt=None,
693
"""Return a formatted date string.
695
:param t: Seconds since the epoch.
696
:param offset: Timezone offset in seconds east of utc.
697
:param timezone: How to display the time: 'utc', 'original' for the
698
timezone specified by offset, or 'local' for the process's current
700
:param date_fmt: strftime format.
701
:param show_offset: Whether to append the timezone.
703
(date_fmt, tt, offset_str) = \
704
_format_date(t, offset, timezone, date_fmt, show_offset)
705
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
706
date_str = time.strftime(date_fmt, tt)
707
return date_str + offset_str
709
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
711
"""Return an unicode date string formatted according to the current locale.
713
:param t: Seconds since the epoch.
714
:param offset: Timezone offset in seconds east of utc.
715
:param timezone: How to display the time: 'utc', 'original' for the
716
timezone specified by offset, or 'local' for the process's current
718
:param date_fmt: strftime format.
719
:param show_offset: Whether to append the timezone.
721
(date_fmt, tt, offset_str) = \
722
_format_date(t, offset, timezone, date_fmt, show_offset)
723
date_str = time.strftime(date_fmt, tt)
724
if not isinstance(date_str, unicode):
725
date_str = date_str.decode(get_user_encoding(), 'replace')
726
return date_str + offset_str
728
def _format_date(t, offset, timezone, date_fmt, show_offset):
383
729
if timezone == 'utc':
384
730
tt = time.gmtime(t)
386
732
elif timezone == 'original':
389
735
tt = time.gmtime(t + offset)
390
736
elif timezone == 'local':
391
737
tt = time.localtime(t)
392
738
offset = local_time_offset(t)
394
raise BzrError("unsupported timezone format %r" % timezone,
395
['options are "utc", "original", "local"'])
397
return (time.strftime("%a %Y-%m-%d %H:%M:%S", tt)
398
+ ' %+03d%02d' % (offset / 3600, (offset / 60) % 60))
740
raise errors.UnsupportedTimezoneFormat(timezone)
742
date_fmt = "%a %Y-%m-%d %H:%M:%S"
744
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
747
return (date_fmt, tt, offset_str)
401
750
def compact_date(when):
402
751
return time.strftime('%Y%m%d%H%M%S', time.gmtime(when))
754
def format_delta(delta):
755
"""Get a nice looking string for a time delta.
757
:param delta: The time difference in seconds, can be positive or negative.
758
positive indicates time in the past, negative indicates time in the
759
future. (usually time.time() - stored_time)
760
:return: String formatted to show approximate resolution
766
direction = 'in the future'
770
if seconds < 90: # print seconds up to 90 seconds
772
return '%d second %s' % (seconds, direction,)
774
return '%d seconds %s' % (seconds, direction)
776
minutes = int(seconds / 60)
777
seconds -= 60 * minutes
782
if minutes < 90: # print minutes, seconds up to 90 minutes
784
return '%d minute, %d second%s %s' % (
785
minutes, seconds, plural_seconds, direction)
787
return '%d minutes, %d second%s %s' % (
788
minutes, seconds, plural_seconds, direction)
790
hours = int(minutes / 60)
791
minutes -= 60 * hours
798
return '%d hour, %d minute%s %s' % (hours, minutes,
799
plural_minutes, direction)
800
return '%d hours, %d minute%s %s' % (hours, minutes,
801
plural_minutes, direction)
407
804
"""Return size of given open file."""
408
805
return os.fstat(f.fileno())[ST_SIZE]
411
if hasattr(os, 'urandom'): # python 2.4 and later
808
# Define rand_bytes based on platform.
810
# Python 2.4 and later have os.urandom,
811
# but it doesn't work on some arches
412
813
rand_bytes = os.urandom
413
elif sys.platform == 'linux2':
414
rand_bytes = file('/dev/urandom', 'rb').read
416
# not well seeded, but better than nothing
421
s += chr(random.randint(0, 255))
814
except (NotImplementedError, AttributeError):
815
# If python doesn't have os.urandom, or it doesn't work,
816
# then try to first pull random data from /dev/urandom
818
rand_bytes = file('/dev/urandom', 'rb').read
819
# Otherwise, use this hack as a last resort
820
except (IOError, OSError):
821
# not well seeded, but better than nothing
826
s += chr(random.randint(0, 255))
831
ALNUM = '0123456789abcdefghijklmnopqrstuvwxyz'
833
"""Return a random string of num alphanumeric characters
835
The result only contains lowercase chars because it may be used on
836
case-insensitive filesystems.
839
for raw_byte in rand_bytes(num):
840
s += ALNUM[ord(raw_byte) % 36]
426
844
## TODO: We could later have path objects that remember their list
427
845
## decomposition (might be too tricksy though.)
429
847
def splitpath(p):
430
"""Turn string into list of parts.
436
>>> splitpath('a/./b')
438
>>> splitpath('a/.b')
440
>>> splitpath('a/../b')
441
Traceback (most recent call last):
443
BzrError: sorry, '..' not allowed in path
445
assert isinstance(p, types.StringTypes)
848
"""Turn string into list of parts."""
447
849
# split on either delimiter because people might use either on
449
851
ps = re.split(r'[\\/]', p)
454
raise BzrError("sorry, %r not allowed in path" % f)
856
raise errors.BzrError("sorry, %r not allowed in path" % f)
455
857
elif (f == '.') or (f == ''):
462
assert isinstance(p, list)
464
if (f == '..') or (f == None) or (f == ''):
465
raise BzrError("sorry, %r not allowed in path" % f)
466
return os.path.join(*p)
469
def appendpath(p1, p2):
473
return os.path.join(p1, p2)
866
if (f == '..') or (f is None) or (f == ''):
867
raise errors.BzrError("sorry, %r not allowed in path" % f)
871
def parent_directories(filename):
872
"""Return the list of parent directories, deepest first.
476
def extern_command(cmd, ignore_errors = False):
477
mutter('external command: %s' % `cmd`)
479
if not ignore_errors:
480
raise BzrError('command failed')
483
def _read_config_value(name):
484
"""Read a config value from the file ~/.bzr.conf/<name>
485
Return None if the file does not exist"""
487
f = file(os.path.join(config_dir(), name), "r")
488
return f.read().decode(bzrlib.user_encoding).rstrip("\r\n")
490
if e.errno == errno.ENOENT:
874
For example, parent_directories("a/b/c") -> ["a/b", "a"].
877
parts = splitpath(dirname(filename))
879
parents.append(joinpath(parts))
885
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
887
from bzrlib._chunks_to_lines_py import chunks_to_lines
891
"""Split s into lines, but without removing the newline characters."""
892
# Trivially convert a fulltext into a 'chunked' representation, and let
893
# chunks_to_lines do the heavy lifting.
894
if isinstance(s, str):
895
# chunks_to_lines only supports 8-bit strings
896
return chunks_to_lines([s])
898
return _split_lines(s)
902
"""Split s into lines, but without removing the newline characters.
904
This supports Unicode or plain string objects.
906
lines = s.split('\n')
907
result = [line + '\n' for line in lines[:-1]]
909
result.append(lines[-1])
913
def hardlinks_good():
914
return sys.platform not in ('win32', 'cygwin', 'darwin')
917
def link_or_copy(src, dest):
918
"""Hardlink a file, or copy it if it can't be hardlinked."""
919
if not hardlinks_good():
920
shutil.copyfile(src, dest)
924
except (OSError, IOError), e:
925
if e.errno != errno.EXDEV:
927
shutil.copyfile(src, dest)
930
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
931
# Forgiveness than Permission (EAFP) because:
932
# - root can damage a solaris file system by using unlink,
933
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
934
# EACCES, OSX: EPERM) when invoked on a directory.
935
def delete_any(path):
936
"""Delete a file or directory."""
937
if isdir(path): # Takes care of symlinks
944
if getattr(os, 'symlink', None) is not None:
951
if getattr(os, 'link', None) is not None:
957
def host_os_dereferences_symlinks():
958
return (has_symlinks()
959
and sys.platform not in ('cygwin', 'win32'))
962
def readlink(abspath):
963
"""Return a string representing the path to which the symbolic link points.
965
:param abspath: The link absolute unicode path.
967
This his guaranteed to return the symbolic link in unicode in all python
970
link = abspath.encode(_fs_enc)
971
target = os.readlink(link)
972
target = target.decode(_fs_enc)
976
def contains_whitespace(s):
977
"""True if there are any whitespace characters in s."""
978
# string.whitespace can include '\xa0' in certain locales, because it is
979
# considered "non-breaking-space" as part of ISO-8859-1. But it
980
# 1) Isn't a breaking whitespace
981
# 2) Isn't one of ' \t\r\n' which are characters we sometimes use as
983
# 3) '\xa0' isn't unicode safe since it is >128.
985
# This should *not* be a unicode set of characters in case the source
986
# string is not a Unicode string. We can auto-up-cast the characters since
987
# they are ascii, but we don't want to auto-up-cast the string in case it
989
for ch in ' \t\n\r\v\f':
996
def contains_linebreaks(s):
997
"""True if there is any vertical whitespace in s."""
1005
def relpath(base, path):
1006
"""Return path relative to base, or raise exception.
1008
The path may be either an absolute path or a path relative to the
1009
current working directory.
1011
os.path.commonprefix (python2.4) has a bad bug that it works just
1012
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
1013
avoids that problem.
1016
if len(base) < MIN_ABS_PATHLENGTH:
1017
# must have space for e.g. a drive letter
1018
raise ValueError('%r is too short to calculate a relative path'
1025
while len(head) >= len(base):
1028
head, tail = os.path.split(head)
1032
raise errors.PathNotChild(rp, base)
1040
def _cicp_canonical_relpath(base, path):
1041
"""Return the canonical path relative to base.
1043
Like relpath, but on case-insensitive-case-preserving file-systems, this
1044
will return the relpath as stored on the file-system rather than in the
1045
case specified in the input string, for all existing portions of the path.
1047
This will cause O(N) behaviour if called for every path in a tree; if you
1048
have a number of paths to convert, you should use canonical_relpaths().
1050
# TODO: it should be possible to optimize this for Windows by using the
1051
# win32 API FindFiles function to look for the specified name - but using
1052
# os.listdir() still gives us the correct, platform agnostic semantics in
1055
rel = relpath(base, path)
1056
# '.' will have been turned into ''
1060
abs_base = abspath(base)
1062
_listdir = os.listdir
1064
# use an explicit iterator so we can easily consume the rest on early exit.
1065
bit_iter = iter(rel.split('/'))
1066
for bit in bit_iter:
1068
for look in _listdir(current):
1069
if lbit == look.lower():
1070
current = pathjoin(current, look)
1073
# got to the end, nothing matched, so we just return the
1074
# non-existing bits as they were specified (the filename may be
1075
# the target of a move, for example).
1076
current = pathjoin(current, bit, *list(bit_iter))
1078
return current[len(abs_base)+1:]
1080
# XXX - TODO - we need better detection/integration of case-insensitive
1081
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1082
# filesystems), for example, so could probably benefit from the same basic
1083
# support there. For now though, only Windows and OSX get that support, and
1084
# they get it for *all* file-systems!
1085
if sys.platform in ('win32', 'darwin'):
1086
canonical_relpath = _cicp_canonical_relpath
1088
canonical_relpath = relpath
1090
def canonical_relpaths(base, paths):
1091
"""Create an iterable to canonicalize a sequence of relative paths.
1093
The intent is for this implementation to use a cache, vastly speeding
1094
up multiple transformations in the same directory.
1096
# but for now, we haven't optimized...
1097
return [canonical_relpath(base, p) for p in paths]
1099
def safe_unicode(unicode_or_utf8_string):
1100
"""Coerce unicode_or_utf8_string into unicode.
1102
If it is unicode, it is returned.
1103
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1104
wrapped in a BzrBadParameterNotUnicode exception.
1106
if isinstance(unicode_or_utf8_string, unicode):
1107
return unicode_or_utf8_string
1109
return unicode_or_utf8_string.decode('utf8')
1110
except UnicodeDecodeError:
1111
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1114
def safe_utf8(unicode_or_utf8_string):
1115
"""Coerce unicode_or_utf8_string to a utf8 string.
1117
If it is a str, it is returned.
1118
If it is Unicode, it is encoded into a utf-8 string.
1120
if isinstance(unicode_or_utf8_string, str):
1121
# TODO: jam 20070209 This is overkill, and probably has an impact on
1122
# performance if we are dealing with lots of apis that want a
1125
# Make sure it is a valid utf-8 string
1126
unicode_or_utf8_string.decode('utf-8')
1127
except UnicodeDecodeError:
1128
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1129
return unicode_or_utf8_string
1130
return unicode_or_utf8_string.encode('utf-8')
1133
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1134
' Revision id generators should be creating utf8'
1138
def safe_revision_id(unicode_or_utf8_string, warn=True):
1139
"""Revision ids should now be utf8, but at one point they were unicode.
1141
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1143
:param warn: Functions that are sanitizing user data can set warn=False
1144
:return: None or a utf8 revision id.
1146
if (unicode_or_utf8_string is None
1147
or unicode_or_utf8_string.__class__ == str):
1148
return unicode_or_utf8_string
1150
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1152
return cache_utf8.encode(unicode_or_utf8_string)
1155
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1156
' generators should be creating utf8 file ids.')
1159
def safe_file_id(unicode_or_utf8_string, warn=True):
1160
"""File ids should now be utf8, but at one point they were unicode.
1162
This is the same as safe_utf8, except it uses the cached encode functions
1163
to save a little bit of performance.
1165
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1167
:param warn: Functions that are sanitizing user data can set warn=False
1168
:return: None or a utf8 file id.
1170
if (unicode_or_utf8_string is None
1171
or unicode_or_utf8_string.__class__ == str):
1172
return unicode_or_utf8_string
1174
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1176
return cache_utf8.encode(unicode_or_utf8_string)
1179
_platform_normalizes_filenames = False
1180
if sys.platform == 'darwin':
1181
_platform_normalizes_filenames = True
1184
def normalizes_filenames():
1185
"""Return True if this platform normalizes unicode filenames.
1187
Mac OSX does, Windows/Linux do not.
1189
return _platform_normalizes_filenames
1192
def _accessible_normalized_filename(path):
1193
"""Get the unicode normalized path, and if you can access the file.
1195
On platforms where the system normalizes filenames (Mac OSX),
1196
you can access a file by any path which will normalize correctly.
1197
On platforms where the system does not normalize filenames
1198
(Windows, Linux), you have to access a file by its exact path.
1200
Internally, bzr only supports NFC normalization, since that is
1201
the standard for XML documents.
1203
So return the normalized path, and a flag indicating if the file
1204
can be accessed by that path.
1207
return unicodedata.normalize('NFC', unicode(path)), True
1210
def _inaccessible_normalized_filename(path):
1211
__doc__ = _accessible_normalized_filename.__doc__
1213
normalized = unicodedata.normalize('NFC', unicode(path))
1214
return normalized, normalized == path
1217
if _platform_normalizes_filenames:
1218
normalized_filename = _accessible_normalized_filename
1220
normalized_filename = _inaccessible_normalized_filename
1223
def terminal_width():
1224
"""Return estimated terminal width."""
1225
if sys.platform == 'win32':
1226
return win32utils.get_console_size()[0]
1229
import struct, fcntl, termios
1230
s = struct.pack('HHHH', 0, 0, 0, 0)
1231
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1232
width = struct.unpack('HHHH', x)[1]
1237
width = int(os.environ['COLUMNS'])
1246
def supports_executable():
1247
return sys.platform != "win32"
1250
def supports_posix_readonly():
1251
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1253
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1254
directory controls creation/deletion, etc.
1256
And under win32, readonly means that the directory itself cannot be
1257
deleted. The contents of a readonly directory can be changed, unlike POSIX
1258
where files in readonly directories cannot be added, deleted or renamed.
1260
return sys.platform != "win32"
1263
def set_or_unset_env(env_variable, value):
1264
"""Modify the environment, setting or removing the env_variable.
1266
:param env_variable: The environment variable in question
1267
:param value: The value to set the environment to. If None, then
1268
the variable will be removed.
1269
:return: The original value of the environment variable.
1271
orig_val = os.environ.get(env_variable)
1273
if orig_val is not None:
1274
del os.environ[env_variable]
1276
if isinstance(value, unicode):
1277
value = value.encode(get_user_encoding())
1278
os.environ[env_variable] = value
1282
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
1285
def check_legal_path(path):
1286
"""Check whether the supplied path is legal.
1287
This is only required on Windows, so we don't test on other platforms
1290
if sys.platform != "win32":
1292
if _validWin32PathRE.match(path) is None:
1293
raise errors.IllegalPath(path)
1296
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1298
def _is_error_enotdir(e):
1299
"""Check if this exception represents ENOTDIR.
1301
Unfortunately, python is very inconsistent about the exception
1302
here. The cases are:
1303
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1304
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1305
which is the windows error code.
1306
3) Windows, Python2.5 uses errno == EINVAL and
1307
winerror == ERROR_DIRECTORY
1309
:param e: An Exception object (expected to be OSError with an errno
1310
attribute, but we should be able to cope with anything)
1311
:return: True if this represents an ENOTDIR error. False otherwise.
1313
en = getattr(e, 'errno', None)
1314
if (en == errno.ENOTDIR
1315
or (sys.platform == 'win32'
1316
and (en == _WIN32_ERROR_DIRECTORY
1317
or (en == errno.EINVAL
1318
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1324
def walkdirs(top, prefix=""):
1325
"""Yield data about all the directories in a tree.
1327
This yields all the data about the contents of a directory at a time.
1328
After each directory has been yielded, if the caller has mutated the list
1329
to exclude some directories, they are then not descended into.
1331
The data yielded is of the form:
1332
((directory-relpath, directory-path-from-top),
1333
[(relpath, basename, kind, lstat, path-from-top), ...]),
1334
- directory-relpath is the relative path of the directory being returned
1335
with respect to top. prefix is prepended to this.
1336
- directory-path-from-root is the path including top for this directory.
1337
It is suitable for use with os functions.
1338
- relpath is the relative path within the subtree being walked.
1339
- basename is the basename of the path
1340
- kind is the kind of the file now. If unknown then the file is not
1341
present within the tree - but it may be recorded as versioned. See
1343
- lstat is the stat data *if* the file was statted.
1344
- planned, not implemented:
1345
path_from_tree_root is the path from the root of the tree.
1347
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1348
allows one to walk a subtree but get paths that are relative to a tree
1350
:return: an iterator over the dirs.
1352
#TODO there is a bit of a smell where the results of the directory-
1353
# summary in this, and the path from the root, may not agree
1354
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1355
# potentially confusing output. We should make this more robust - but
1356
# not at a speed cost. RBC 20060731
1358
_directory = _directory_kind
1359
_listdir = os.listdir
1360
_kind_from_mode = file_kind_from_stat_mode
1361
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
1363
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1364
relroot, _, _, _, top = pending.pop()
1366
relprefix = relroot + u'/'
1369
top_slash = top + u'/'
1372
append = dirblock.append
1374
names = sorted(_listdir(top))
1376
if not _is_error_enotdir(e):
1380
abspath = top_slash + name
1381
statvalue = _lstat(abspath)
1382
kind = _kind_from_mode(statvalue.st_mode)
1383
append((relprefix + name, name, kind, statvalue, abspath))
1384
yield (relroot, top), dirblock
1386
# push the user specified dirs from dirblock
1387
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1390
class DirReader(object):
1391
"""An interface for reading directories."""
1393
def top_prefix_to_starting_dir(self, top, prefix=""):
1394
"""Converts top and prefix to a starting dir entry
1396
:param top: A utf8 path
1397
:param prefix: An optional utf8 path to prefix output relative paths
1399
:return: A tuple starting with prefix, and ending with the native
1402
raise NotImplementedError(self.top_prefix_to_starting_dir)
1404
def read_dir(self, prefix, top):
1405
"""Read a specific dir.
1407
:param prefix: A utf8 prefix to be preprended to the path basenames.
1408
:param top: A natively encoded path to read.
1409
:return: A list of the directories contents. Each item contains:
1410
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1412
raise NotImplementedError(self.read_dir)
1415
_selected_dir_reader = None
1418
def _walkdirs_utf8(top, prefix=""):
1419
"""Yield data about all the directories in a tree.
1421
This yields the same information as walkdirs() only each entry is yielded
1422
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1423
are returned as exact byte-strings.
1425
:return: yields a tuple of (dir_info, [file_info])
1426
dir_info is (utf8_relpath, path-from-top)
1427
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1428
if top is an absolute path, path-from-top is also an absolute path.
1429
path-from-top might be unicode or utf8, but it is the correct path to
1430
pass to os functions to affect the file in question. (such as os.lstat)
1432
global _selected_dir_reader
1433
if _selected_dir_reader is None:
1434
fs_encoding = _fs_enc.upper()
1435
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1436
# Win98 doesn't have unicode apis like FindFirstFileW
1437
# TODO: We possibly could support Win98 by falling back to the
1438
# original FindFirstFile, and using TCHAR instead of WCHAR,
1439
# but that gets a bit tricky, and requires custom compiling
1442
from bzrlib._walkdirs_win32 import Win32ReadDir
1443
_selected_dir_reader = Win32ReadDir()
1446
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1447
# ANSI_X3.4-1968 is a form of ASCII
1449
from bzrlib._readdir_pyx import UTF8DirReader
1450
_selected_dir_reader = UTF8DirReader()
1454
if _selected_dir_reader is None:
1455
# Fallback to the python version
1456
_selected_dir_reader = UnicodeDirReader()
1458
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1459
# But we don't actually uses 1-3 in pending, so set them to None
1460
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1461
read_dir = _selected_dir_reader.read_dir
1462
_directory = _directory_kind
1464
relroot, _, _, _, top = pending[-1].pop()
1467
dirblock = sorted(read_dir(relroot, top))
1468
yield (relroot, top), dirblock
1469
# push the user specified dirs from dirblock
1470
next = [d for d in reversed(dirblock) if d[2] == _directory]
1472
pending.append(next)
1475
class UnicodeDirReader(DirReader):
1476
"""A dir reader for non-utf8 file systems, which transcodes."""
1478
__slots__ = ['_utf8_encode']
1481
self._utf8_encode = codecs.getencoder('utf8')
1483
def top_prefix_to_starting_dir(self, top, prefix=""):
1484
"""See DirReader.top_prefix_to_starting_dir."""
1485
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1487
def read_dir(self, prefix, top):
1488
"""Read a single directory from a non-utf8 file system.
1490
top, and the abspath element in the output are unicode, all other paths
1491
are utf8. Local disk IO is done via unicode calls to listdir etc.
1493
This is currently the fallback code path when the filesystem encoding is
1494
not UTF-8. It may be better to implement an alternative so that we can
1495
safely handle paths that are not properly decodable in the current
1498
See DirReader.read_dir for details.
1500
_utf8_encode = self._utf8_encode
1502
_listdir = os.listdir
1503
_kind_from_mode = file_kind_from_stat_mode
1506
relprefix = prefix + '/'
1509
top_slash = top + u'/'
1512
append = dirblock.append
1513
for name in sorted(_listdir(top)):
1515
name_utf8 = _utf8_encode(name)[0]
1516
except UnicodeDecodeError:
1517
raise errors.BadFilenameEncoding(
1518
_utf8_encode(relprefix)[0] + name, _fs_enc)
1519
abspath = top_slash + name
1520
statvalue = _lstat(abspath)
1521
kind = _kind_from_mode(statvalue.st_mode)
1522
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1526
def copy_tree(from_path, to_path, handlers={}):
1527
"""Copy all of the entries in from_path into to_path.
1529
:param from_path: The base directory to copy.
1530
:param to_path: The target directory. If it does not exist, it will
1532
:param handlers: A dictionary of functions, which takes a source and
1533
destinations for files, directories, etc.
1534
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1535
'file', 'directory', and 'symlink' should always exist.
1536
If they are missing, they will be replaced with 'os.mkdir()',
1537
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1539
# Now, just copy the existing cached tree to the new location
1540
# We use a cheap trick here.
1541
# Absolute paths are prefixed with the first parameter
1542
# relative paths are prefixed with the second.
1543
# So we can get both the source and target returned
1544
# without any extra work.
1546
def copy_dir(source, dest):
1549
def copy_link(source, dest):
1550
"""Copy the contents of a symlink"""
1551
link_to = os.readlink(source)
1552
os.symlink(link_to, dest)
1554
real_handlers = {'file':shutil.copy2,
1555
'symlink':copy_link,
1556
'directory':copy_dir,
1558
real_handlers.update(handlers)
1560
if not os.path.exists(to_path):
1561
real_handlers['directory'](from_path, to_path)
1563
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1564
for relpath, name, kind, st, abspath in entries:
1565
real_handlers[kind](abspath, relpath)
1568
def path_prefix_key(path):
1569
"""Generate a prefix-order path key for path.
1571
This can be used to sort paths in the same way that walkdirs does.
1573
return (dirname(path) , path)
1576
def compare_paths_prefix_order(path_a, path_b):
1577
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1578
key_a = path_prefix_key(path_a)
1579
key_b = path_prefix_key(path_b)
1580
return cmp(key_a, key_b)
1583
_cached_user_encoding = None
1586
def get_user_encoding(use_cache=True):
1587
"""Find out what the preferred user encoding is.
1589
This is generally the encoding that is used for command line parameters
1590
and file contents. This may be different from the terminal encoding
1591
or the filesystem encoding.
1593
:param use_cache: Enable cache for detected encoding.
1594
(This parameter is turned on by default,
1595
and required only for selftesting)
1597
:return: A string defining the preferred user encoding
1599
global _cached_user_encoding
1600
if _cached_user_encoding is not None and use_cache:
1601
return _cached_user_encoding
1603
if sys.platform == 'darwin':
1604
# python locale.getpreferredencoding() always return
1605
# 'mac-roman' on darwin. That's a lie.
1606
sys.platform = 'posix'
1608
if os.environ.get('LANG', None) is None:
1609
# If LANG is not set, we end up with 'ascii', which is bad
1610
# ('mac-roman' is more than ascii), so we set a default which
1611
# will give us UTF-8 (which appears to work in all cases on
1612
# OSX). Users are still free to override LANG of course, as
1613
# long as it give us something meaningful. This work-around
1614
# *may* not be needed with python 3k and/or OSX 10.5, but will
1615
# work with them too -- vila 20080908
1616
os.environ['LANG'] = 'en_US.UTF-8'
1619
sys.platform = 'darwin'
1624
user_encoding = locale.getpreferredencoding()
1625
except locale.Error, e:
1626
sys.stderr.write('bzr: warning: %s\n'
1627
' Could not determine what text encoding to use.\n'
1628
' This error usually means your Python interpreter\n'
1629
' doesn\'t support the locale set by $LANG (%s)\n'
1630
" Continuing with ascii encoding.\n"
1631
% (e, os.environ.get('LANG')))
1632
user_encoding = 'ascii'
1634
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1635
# treat that as ASCII, and not support printing unicode characters to the
1638
# For python scripts run under vim, we get '', so also treat that as ASCII
1639
if user_encoding in (None, 'cp0', ''):
1640
user_encoding = 'ascii'
1644
codecs.lookup(user_encoding)
1646
sys.stderr.write('bzr: warning:'
1647
' unknown encoding %s.'
1648
' Continuing with ascii encoding.\n'
1651
user_encoding = 'ascii'
1654
_cached_user_encoding = user_encoding
1656
return user_encoding
1659
def get_host_name():
1660
"""Return the current unicode host name.
1662
This is meant to be used in place of socket.gethostname() because that
1663
behaves inconsistently on different platforms.
1665
if sys.platform == "win32":
1667
return win32utils.get_host_name()
1670
return socket.gethostname().decode(get_user_encoding())
1673
def recv_all(socket, bytes):
1674
"""Receive an exact number of bytes.
1676
Regular Socket.recv() may return less than the requested number of bytes,
1677
dependning on what's in the OS buffer. MSG_WAITALL is not available
1678
on all platforms, but this should work everywhere. This will return
1679
less than the requested amount if the remote end closes.
1681
This isn't optimized and is intended mostly for use in testing.
1684
while len(b) < bytes:
1685
new = until_no_eintr(socket.recv, bytes - len(b))
1692
def send_all(socket, bytes, report_activity=None):
1693
"""Send all bytes on a socket.
1695
Regular socket.sendall() can give socket error 10053 on Windows. This
1696
implementation sends no more than 64k at a time, which avoids this problem.
1698
:param report_activity: Call this as bytes are read, see
1699
Transport._report_activity
1702
for pos in xrange(0, len(bytes), chunk_size):
1703
block = bytes[pos:pos+chunk_size]
1704
if report_activity is not None:
1705
report_activity(len(block), 'write')
1706
until_no_eintr(socket.sendall, block)
1709
def dereference_path(path):
1710
"""Determine the real path to a file.
1712
All parent elements are dereferenced. But the file itself is not
1714
:param path: The original path. May be absolute or relative.
1715
:return: the real path *to* the file
1717
parent, base = os.path.split(path)
1718
# The pathjoin for '.' is a workaround for Python bug #1213894.
1719
# (initial path components aren't dereferenced)
1720
return pathjoin(realpath(pathjoin('.', parent)), base)
1723
def supports_mapi():
1724
"""Return True if we can use MAPI to launch a mail client."""
1725
return sys.platform == "win32"
1728
def resource_string(package, resource_name):
1729
"""Load a resource from a package and return it as a string.
1731
Note: Only packages that start with bzrlib are currently supported.
1733
This is designed to be a lightweight implementation of resource
1734
loading in a way which is API compatible with the same API from
1736
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
1737
If and when pkg_resources becomes a standard library, this routine
1740
# Check package name is within bzrlib
1741
if package == "bzrlib":
1742
resource_relpath = resource_name
1743
elif package.startswith("bzrlib."):
1744
package = package[len("bzrlib."):].replace('.', os.sep)
1745
resource_relpath = pathjoin(package, resource_name)
1747
raise errors.BzrError('resource package %s not in bzrlib' % package)
1749
# Map the resource to a file and read its contents
1750
base = dirname(bzrlib.__file__)
1751
if getattr(sys, 'frozen', None): # bzr.exe
1752
base = abspath(pathjoin(base, '..', '..'))
1753
filename = pathjoin(base, resource_relpath)
1754
return open(filename, 'rU').read()
1757
def file_kind_from_stat_mode_thunk(mode):
1758
global file_kind_from_stat_mode
1759
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
1761
from bzrlib._readdir_pyx import UTF8DirReader
1762
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
1764
from bzrlib._readdir_py import (
1765
_kind_from_mode as file_kind_from_stat_mode
1767
return file_kind_from_stat_mode(mode)
1768
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1771
def file_kind(f, _lstat=os.lstat):
1773
return file_kind_from_stat_mode(_lstat(f).st_mode)
1775
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1776
raise errors.NoSuchFile(f)
496
"""Return a sequence of possible editor binaries for the current platform"""
497
e = _read_config_value("editor")
501
if os.name == "windows":
503
elif os.name == "posix":
505
yield os.environ["EDITOR"]
510
def _run_editor(filename):
511
"""Try to execute an editor to edit the commit message. Returns True on success,
513
for e in _get_editor():
514
x = os.spawnvp(os.P_WAIT, e, (e, filename))
521
raise BzrError("Could not start any editor. Please specify $EDITOR or use ~/.bzr.conf/editor")
525
def get_text_message(infotext, ignoreline = "default"):
528
if ignoreline == "default":
529
ignoreline = "-- This line and the following will be ignored --"
532
tmp_fileno, msgfilename = tempfile.mkstemp()
533
msgfile = os.close(tmp_fileno)
534
if infotext is not None and infotext != "":
536
msgfile = file(msgfilename, "w")
537
msgfile.write("\n\n%s\n\n%s" % (ignoreline, infotext))
542
if not _run_editor(msgfilename):
547
lastline, nlines = 0, 0
548
for line in file(msgfilename, "r"):
549
stripped_line = line.strip()
550
# strip empty line before the log message starts
552
if stripped_line != "":
556
# check for the ignore line only if there
557
# is additional information at the end
558
if hasinfo and stripped_line == ignoreline:
561
# keep track of the last line that had some content
562
if stripped_line != "":
568
# delete empty lines at the end
570
# add a newline at the end, if needed
571
if not msg[-1].endswith("\n"):
572
return "%s%s" % ("".join(msg), "\n")
576
# delete the msg file in any case
577
try: os.unlink(msgfilename)
1780
def until_no_eintr(f, *a, **kw):
1781
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
1782
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
1786
except (IOError, OSError), e:
1787
if e.errno == errno.EINTR:
1791
def re_compile_checked(re_string, flags=0, where=""):
1792
"""Return a compiled re, or raise a sensible error.
1794
This should only be used when compiling user-supplied REs.
1796
:param re_string: Text form of regular expression.
1797
:param flags: eg re.IGNORECASE
1798
:param where: Message explaining to the user the context where
1799
it occurred, eg 'log search filter'.
1801
# from https://bugs.launchpad.net/bzr/+bug/251352
1803
re_obj = re.compile(re_string, flags)
1808
where = ' in ' + where
1809
# despite the name 'error' is a type
1810
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
1811
% (where, re_string, e))
1814
if sys.platform == "win32":
1817
return msvcrt.getch()
1822
fd = sys.stdin.fileno()
1823
settings = termios.tcgetattr(fd)
1826
ch = sys.stdin.read(1)
1828
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
1832
if sys.platform == 'linux2':
1833
def _local_concurrency():
1835
prefix = 'processor'
1836
for line in file('/proc/cpuinfo', 'rb'):
1837
if line.startswith(prefix):
1838
concurrency = int(line[line.find(':')+1:]) + 1
1840
elif sys.platform == 'darwin':
1841
def _local_concurrency():
1842
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
1843
stdout=subprocess.PIPE).communicate()[0]
1844
elif sys.platform[0:7] == 'freebsd':
1845
def _local_concurrency():
1846
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
1847
stdout=subprocess.PIPE).communicate()[0]
1848
elif sys.platform == 'sunos5':
1849
def _local_concurrency():
1850
return subprocess.Popen(['psrinfo', '-p',],
1851
stdout=subprocess.PIPE).communicate()[0]
1852
elif sys.platform == "win32":
1853
def _local_concurrency():
1854
# This appears to return the number of cores.
1855
return os.environ.get('NUMBER_OF_PROCESSORS')
1857
def _local_concurrency():
1862
_cached_local_concurrency = None
1864
def local_concurrency(use_cache=True):
1865
"""Return how many processes can be run concurrently.
1867
Rely on platform specific implementations and default to 1 (one) if
1868
anything goes wrong.
1870
global _cached_local_concurrency
1871
if _cached_local_concurrency is not None and use_cache:
1872
return _cached_local_concurrency
1875
concurrency = _local_concurrency()
1876
except (OSError, IOError):
1879
concurrency = int(concurrency)
1880
except (TypeError, ValueError):
1883
_cached_concurrency = concurrency
added
removed
bzrlib/osutils.py
