69
79
from bzrlib import symbol_versioning
82
# Cross platform wall-clock time functionality with decent resolution.
83
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
84
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
85
# synchronized with ``time.time()``, this is only meant to be used to find
86
# delta times by subtracting from another call to this function.
87
timer_func = time.time
88
if sys.platform == 'win32':
89
timer_func = time.clock
72
91
# On win32, O_BINARY is used to indicate the file should
73
92
# be opened in binary mode, rather than text mode.
74
93
# On other platforms, O_BINARY doesn't exist, because
75
94
# they always open in binary mode, so it is okay to
76
# OR with 0 on those platforms
95
# OR with 0 on those platforms.
96
# O_NOINHERIT and O_TEXT exists only on win32 too.
77
97
O_BINARY = getattr(os, 'O_BINARY', 0)
98
O_TEXT = getattr(os, 'O_TEXT', 0)
99
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
102
def get_unicode_argv():
104
user_encoding = get_user_encoding()
105
return [a.decode(user_encoding) for a in sys.argv[1:]]
106
except UnicodeDecodeError:
107
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
80
111
def make_readonly(filename):
172
211
def fancy_rename(old, new, rename_func, unlink_func):
173
212
"""A fancy rename, when you don't have atomic rename.
175
214
:param old: The old path, to rename from
176
215
:param new: The new path, to rename to
177
216
:param rename_func: The potentially non-atomic rename function
178
:param unlink_func: A way to delete the target file if the full rename succeeds
217
:param unlink_func: A way to delete the target file if the full rename
181
220
# sftp rename doesn't allow overwriting, so play tricks:
182
221
base = os.path.basename(new)
183
222
dirname = os.path.dirname(new)
184
tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(), os.getpid(), rand_chars(10))
223
# callers use different encodings for the paths so the following MUST
224
# respect that. We rely on python upcasting to unicode if new is unicode
225
# and keeping a str if not.
226
tmp_name = 'tmp.%s.%.9f.%d.%s' % (base, time.time(),
227
os.getpid(), rand_chars(10))
185
228
tmp_name = pathjoin(dirname, tmp_name)
187
230
# Rename the file out of the way, but keep track if it didn't exist
317
367
"""We expect to be able to atomically replace 'new' with old.
319
369
On win32, if new exists, it must be moved out of the way first,
323
373
fancy_rename(old, new, rename_func=os.rename, unlink_func=os.unlink)
324
374
except OSError, e:
325
375
if e.errno in (errno.EPERM, errno.EACCES, errno.EBUSY, errno.EINVAL):
326
# If we try to rename a non-existant file onto cwd, we get
327
# EPERM or EACCES instead of ENOENT, this will raise ENOENT
376
# If we try to rename a non-existant file onto cwd, we get
377
# EPERM or EACCES instead of ENOENT, this will raise ENOENT
328
378
# if the old path doesn't exist, sometimes we get EACCES
329
379
# On Linux, we seem to get EBUSY, on Mac we get EINVAL
658
742
date_str = time.strftime(date_fmt, tt)
659
743
return date_str + offset_str
746
# Cache of formatted offset strings
750
def format_date_with_offset_in_original_timezone(t, offset=0,
751
_cache=_offset_cache):
752
"""Return a formatted date string in the original timezone.
754
This routine may be faster then format_date.
756
:param t: Seconds since the epoch.
757
:param offset: Timezone offset in seconds east of utc.
761
tt = time.gmtime(t + offset)
762
date_fmt = _default_format_by_weekday_num[tt[6]]
763
date_str = time.strftime(date_fmt, tt)
764
offset_str = _cache.get(offset, None)
765
if offset_str is None:
766
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
767
_cache[offset] = offset_str
768
return date_str + offset_str
661
771
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
662
772
show_offset=True):
663
773
"""Return an unicode date string formatted according to the current locale.
819
931
return pathjoin(*p)
934
def parent_directories(filename):
935
"""Return the list of parent directories, deepest first.
937
For example, parent_directories("a/b/c") -> ["a/b", "a"].
940
parts = splitpath(dirname(filename))
942
parents.append(joinpath(parts))
947
_extension_load_failures = []
950
def failed_to_load_extension(exception):
951
"""Handle failing to load a binary extension.
953
This should be called from the ImportError block guarding the attempt to
954
import the native extension. If this function returns, the pure-Python
955
implementation should be loaded instead::
958
>>> import bzrlib._fictional_extension_pyx
959
>>> except ImportError, e:
960
>>> bzrlib.osutils.failed_to_load_extension(e)
961
>>> import bzrlib._fictional_extension_py
963
# NB: This docstring is just an example, not a doctest, because doctest
964
# currently can't cope with the use of lazy imports in this namespace --
967
# This currently doesn't report the failure at the time it occurs, because
968
# they tend to happen very early in startup when we can't check config
969
# files etc, and also we want to report all failures but not spam the user
971
from bzrlib import trace
972
exception_str = str(exception)
973
if exception_str not in _extension_load_failures:
974
trace.mutter("failed to load compiled extension: %s" % exception_str)
975
_extension_load_failures.append(exception_str)
978
def report_extension_load_failures():
979
if not _extension_load_failures:
981
from bzrlib.config import GlobalConfig
982
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
984
# the warnings framework should by default show this only once
985
from bzrlib.trace import warning
987
"bzr: warning: some compiled extensions could not be loaded; "
988
"see <https://answers.launchpad.net/bzr/+faq/703>")
989
# we no longer show the specific missing extensions here, because it makes
990
# the message too long and scary - see
991
# https://bugs.launchpad.net/bzr/+bug/430529
995
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
996
except ImportError, e:
997
failed_to_load_extension(e)
998
from bzrlib._chunks_to_lines_py import chunks_to_lines
822
1001
def split_lines(s):
823
1002
"""Split s into lines, but without removing the newline characters."""
1003
# Trivially convert a fulltext into a 'chunked' representation, and let
1004
# chunks_to_lines do the heavy lifting.
1005
if isinstance(s, str):
1006
# chunks_to_lines only supports 8-bit strings
1007
return chunks_to_lines([s])
1009
return _split_lines(s)
1012
def _split_lines(s):
1013
"""Split s into lines, but without removing the newline characters.
1015
This supports Unicode or plain string objects.
824
1017
lines = s.split('\n')
825
1018
result = [line + '\n' for line in lines[:-1]]
845
1038
shutil.copyfile(src, dest)
848
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
849
# Forgiveness than Permission (EAFP) because:
850
# - root can damage a solaris file system by using unlink,
851
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
852
# EACCES, OSX: EPERM) when invoked on a directory.
853
1041
def delete_any(path):
854
"""Delete a file or directory."""
1042
"""Delete a file, symlink or directory.
1044
Will delete even if readonly.
1047
_delete_file_or_dir(path)
1048
except (OSError, IOError), e:
1049
if e.errno in (errno.EPERM, errno.EACCES):
1050
# make writable and try again
1053
except (OSError, IOError):
1055
_delete_file_or_dir(path)
1060
def _delete_file_or_dir(path):
1061
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
1062
# Forgiveness than Permission (EAFP) because:
1063
# - root can damage a solaris file system by using unlink,
1064
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
1065
# EACCES, OSX: EPERM) when invoked on a directory.
855
1066
if isdir(path): # Takes care of symlinks
929
while len(head) >= len(base):
1155
if len(head) <= len(base) and head != base:
1156
raise errors.PathNotChild(rp, base)
930
1157
if head == base:
932
head, tail = os.path.split(head)
1159
head, tail = split(head)
936
raise errors.PathNotChild(rp, base)
1164
return pathjoin(*reversed(s))
1169
def _cicp_canonical_relpath(base, path):
1170
"""Return the canonical path relative to base.
1172
Like relpath, but on case-insensitive-case-preserving file-systems, this
1173
will return the relpath as stored on the file-system rather than in the
1174
case specified in the input string, for all existing portions of the path.
1176
This will cause O(N) behaviour if called for every path in a tree; if you
1177
have a number of paths to convert, you should use canonical_relpaths().
1179
# TODO: it should be possible to optimize this for Windows by using the
1180
# win32 API FindFiles function to look for the specified name - but using
1181
# os.listdir() still gives us the correct, platform agnostic semantics in
1184
rel = relpath(base, path)
1185
# '.' will have been turned into ''
1189
abs_base = abspath(base)
1191
_listdir = os.listdir
1193
# use an explicit iterator so we can easily consume the rest on early exit.
1194
bit_iter = iter(rel.split('/'))
1195
for bit in bit_iter:
1198
next_entries = _listdir(current)
1199
except OSError: # enoent, eperm, etc
1200
# We can't find this in the filesystem, so just append the
1202
current = pathjoin(current, bit, *list(bit_iter))
1204
for look in next_entries:
1205
if lbit == look.lower():
1206
current = pathjoin(current, look)
1209
# got to the end, nothing matched, so we just return the
1210
# non-existing bits as they were specified (the filename may be
1211
# the target of a move, for example).
1212
current = pathjoin(current, bit, *list(bit_iter))
1214
return current[len(abs_base):].lstrip('/')
1216
# XXX - TODO - we need better detection/integration of case-insensitive
1217
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1218
# filesystems), for example, so could probably benefit from the same basic
1219
# support there. For now though, only Windows and OSX get that support, and
1220
# they get it for *all* file-systems!
1221
if sys.platform in ('win32', 'darwin'):
1222
canonical_relpath = _cicp_canonical_relpath
1224
canonical_relpath = relpath
1226
def canonical_relpaths(base, paths):
1227
"""Create an iterable to canonicalize a sequence of relative paths.
1229
The intent is for this implementation to use a cache, vastly speeding
1230
up multiple transformations in the same directory.
1232
# but for now, we haven't optimized...
1233
return [canonical_relpath(base, p) for p in paths]
944
1235
def safe_unicode(unicode_or_utf8_string):
945
1236
"""Coerce unicode_or_utf8_string into unicode.
947
1238
If it is unicode, it is returned.
948
Otherwise it is decoded from utf-8. If a decoding error
949
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
950
as a BzrBadParameter exception.
1239
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1240
wrapped in a BzrBadParameterNotUnicode exception.
952
1242
if isinstance(unicode_or_utf8_string, unicode):
953
1243
return unicode_or_utf8_string
1066
1356
normalized_filename = _inaccessible_normalized_filename
1359
def set_signal_handler(signum, handler, restart_syscall=True):
1360
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1361
on platforms that support that.
1363
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1364
automatically restart (by calling `signal.siginterrupt(signum,
1365
False)`). May be ignored if the feature is not available on this
1366
platform or Python version.
1368
old_handler = signal.signal(signum, handler)
1371
siginterrupt = signal.siginterrupt
1372
except AttributeError: # siginterrupt doesn't exist on this platform, or for this version of
1376
siginterrupt(signum, False)
1380
default_terminal_width = 80
1381
"""The default terminal width for ttys.
1383
This is defined so that higher levels can share a common fallback value when
1384
terminal_width() returns None.
1069
1388
def terminal_width():
1070
"""Return estimated terminal width."""
1071
if sys.platform == 'win32':
1072
return win32utils.get_console_size()[0]
1389
"""Return terminal width.
1391
None is returned if the width can't established precisely.
1394
- if BZR_COLUMNS is set, returns its value
1395
- if there is no controlling terminal, returns None
1396
- if COLUMNS is set, returns its value,
1398
From there, we need to query the OS to get the size of the controlling
1402
- get termios.TIOCGWINSZ
1403
- if an error occurs or a negative value is obtained, returns None
1407
- win32utils.get_console_size() decides,
1408
- returns None on error (provided default value)
1411
# If BZR_COLUMNS is set, take it, user is always right
1413
return int(os.environ['BZR_COLUMNS'])
1414
except (KeyError, ValueError):
1417
isatty = getattr(sys.stdout, 'isatty', None)
1418
if isatty is None or not isatty():
1419
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1422
# If COLUMNS is set, take it, the terminal knows better (even inside a
1423
# given terminal, the application can decide to set COLUMNS to a lower
1424
# value (splitted screen) or a bigger value (scroll bars))
1426
return int(os.environ['COLUMNS'])
1427
except (KeyError, ValueError):
1430
width, height = _terminal_size(None, None)
1432
# Consider invalid values as meaning no width
1438
def _win32_terminal_size(width, height):
1439
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1440
return width, height
1443
def _ioctl_terminal_size(width, height):
1075
1445
import struct, fcntl, termios
1076
1446
s = struct.pack('HHHH', 0, 0, 0, 0)
1077
1447
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1078
width = struct.unpack('HHHH', x)[1]
1448
height, width = struct.unpack('HHHH', x)[0:2]
1449
except (IOError, AttributeError):
1083
width = int(os.environ['COLUMNS'])
1451
return width, height
1453
_terminal_size = None
1454
"""Returns the terminal size as (width, height).
1456
:param width: Default value for width.
1457
:param height: Default value for height.
1459
This is defined specifically for each OS and query the size of the controlling
1460
terminal. If any error occurs, the provided default values should be returned.
1462
if sys.platform == 'win32':
1463
_terminal_size = _win32_terminal_size
1465
_terminal_size = _ioctl_terminal_size
1468
def _terminal_size_changed(signum, frame):
1469
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1470
width, height = _terminal_size(None, None)
1471
if width is not None:
1472
os.environ['COLUMNS'] = str(width)
1475
_registered_sigwinch = False
1477
def watch_sigwinch():
1478
"""Register for SIGWINCH, once and only once."""
1479
global _registered_sigwinch
1480
if not _registered_sigwinch:
1481
if sys.platform == 'win32':
1482
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1483
# ReadConsoleInput but I've no idea how to plug that in
1484
# the current design -- vila 20091216
1487
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1488
_registered_sigwinch = True
1092
1491
def supports_executable():
1170
1569
def walkdirs(top, prefix=""):
1171
1570
"""Yield data about all the directories in a tree.
1173
1572
This yields all the data about the contents of a directory at a time.
1174
1573
After each directory has been yielded, if the caller has mutated the list
1175
1574
to exclude some directories, they are then not descended into.
1177
1576
The data yielded is of the form:
1178
1577
((directory-relpath, directory-path-from-top),
1179
1578
[(relpath, basename, kind, lstat, path-from-top), ...]),
1180
1579
- directory-relpath is the relative path of the directory being returned
1181
1580
with respect to top. prefix is prepended to this.
1182
- directory-path-from-root is the path including top for this directory.
1581
- directory-path-from-root is the path including top for this directory.
1183
1582
It is suitable for use with os functions.
1184
1583
- relpath is the relative path within the subtree being walked.
1185
1584
- basename is the basename of the path
1187
1586
present within the tree - but it may be recorded as versioned. See
1188
1587
versioned_kind.
1189
1588
- lstat is the stat data *if* the file was statted.
1190
- planned, not implemented:
1589
- planned, not implemented:
1191
1590
path_from_tree_root is the path from the root of the tree.
1193
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1592
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1194
1593
allows one to walk a subtree but get paths that are relative to a tree
1195
1594
rooted higher up.
1196
1595
:return: an iterator over the dirs.
1198
1597
#TODO there is a bit of a smell where the results of the directory-
1199
# summary in this, and the path from the root, may not agree
1598
# summary in this, and the path from the root, may not agree
1200
1599
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1201
1600
# potentially confusing output. We should make this more robust - but
1202
1601
# not at a speed cost. RBC 20060731
1286
1685
# for win98 anyway.
1288
1687
from bzrlib._walkdirs_win32 import Win32ReadDir
1290
_selected_dir_reader = UnicodeDirReader()
1292
1688
_selected_dir_reader = Win32ReadDir()
1293
elif fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1691
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1294
1692
# ANSI_X3.4-1968 is a form of ASCII
1295
_selected_dir_reader = UnicodeDirReader()
1298
1694
from bzrlib._readdir_pyx import UTF8DirReader
1300
# No optimised code path
1301
_selected_dir_reader = UnicodeDirReader()
1303
1695
_selected_dir_reader = UTF8DirReader()
1696
except ImportError, e:
1697
failed_to_load_extension(e)
1700
if _selected_dir_reader is None:
1701
# Fallback to the python version
1702
_selected_dir_reader = UnicodeDirReader()
1304
1704
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1305
1705
# But we don't actually uses 1-3 in pending, so set them to None
1306
1706
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1411
1811
real_handlers[kind](abspath, relpath)
1814
def copy_ownership(dst, src=None):
1815
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1817
If src is None, the containing directory is used as source. If chown
1818
fails, the error is ignored and a warning is printed.
1820
chown = getattr(os, 'chown', None)
1825
src = os.path.dirname(dst)
1831
chown(dst, s.st_uid, s.st_gid)
1833
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1836
def mkdir_with_ownership(path, ownership_src=None):
1837
"""Create the directory 'path' with specified ownership.
1839
If ownership_src is given, copies (chown) usr/grp ownership
1840
from 'ownership_src' to 'path'. If ownership_src is None, use the
1841
containing dir ownership.
1844
copy_ownership(path, ownership_src)
1847
def open_with_ownership(filename, mode='r', bufsize=-1, ownership_src=None):
1848
"""Open the file 'filename' with the specified ownership.
1850
If ownership_src is specified, copy usr/grp ownership from ownership_src
1851
to filename. If ownership_src is None, copy ownership from containing
1853
Returns the opened file object.
1855
f = open(filename, mode, bufsize)
1856
copy_ownership(filename, ownership_src)
1414
1860
def path_prefix_key(path):
1415
1861
"""Generate a prefix-order path key for path.
1516
1962
return socket.gethostname().decode(get_user_encoding())
1519
def recv_all(socket, bytes):
1965
# We must not read/write any more than 64k at a time from/to a socket so we
1966
# don't risk "no buffer space available" errors on some platforms. Windows in
1967
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1969
MAX_SOCKET_CHUNK = 64 * 1024
1971
def read_bytes_from_socket(sock, report_activity=None,
1972
max_read_size=MAX_SOCKET_CHUNK):
1973
"""Read up to max_read_size of bytes from sock and notify of progress.
1975
Translates "Connection reset by peer" into file-like EOF (return an
1976
empty string rather than raise an error), and repeats the recv if
1977
interrupted by a signal.
1981
bytes = sock.recv(max_read_size)
1982
except socket.error, e:
1984
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1985
# The connection was closed by the other side. Callers expect
1986
# an empty string to signal end-of-stream.
1988
elif eno == errno.EINTR:
1989
# Retry the interrupted recv.
1993
if report_activity is not None:
1994
report_activity(len(bytes), 'read')
1998
def recv_all(socket, count):
1520
1999
"""Receive an exact number of bytes.
1522
2001
Regular Socket.recv() may return less than the requested number of bytes,
1523
dependning on what's in the OS buffer. MSG_WAITALL is not available
2002
depending on what's in the OS buffer. MSG_WAITALL is not available
1524
2003
on all platforms, but this should work everywhere. This will return
1525
2004
less than the requested amount if the remote end closes.
1527
2006
This isn't optimized and is intended mostly for use in testing.
1530
while len(b) < bytes:
1531
new = socket.recv(bytes - len(b))
2009
while len(b) < count:
2010
new = read_bytes_from_socket(socket, None, count - len(b))
1538
def send_all(socket, bytes):
2017
def send_all(sock, bytes, report_activity=None):
1539
2018
"""Send all bytes on a socket.
2020
Breaks large blocks in smaller chunks to avoid buffering limitations on
2021
some platforms, and catches EINTR which may be thrown if the send is
2022
interrupted by a signal.
1541
Regular socket.sendall() can give socket error 10053 on Windows. This
1542
implementation sends no more than 64k at a time, which avoids this problem.
2024
This is preferred to socket.sendall(), because it avoids portability bugs
2025
and provides activity reporting.
2027
:param report_activity: Call this as bytes are read, see
2028
Transport._report_activity
1545
for pos in xrange(0, len(bytes), chunk_size):
1546
socket.sendall(bytes[pos:pos+chunk_size])
2031
byte_count = len(bytes)
2032
while sent_total < byte_count:
2034
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2035
except socket.error, e:
2036
if e.args[0] != errno.EINTR:
2040
report_activity(sent, 'write')
1549
2043
def dereference_path(path):
2116
def until_no_eintr(f, *a, **kw):
2117
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2119
WARNING: you must be certain that it is safe to retry the call repeatedly
2120
if EINTR does occur. This is typically only true for low-level operations
2121
like os.read. If in any doubt, don't use this.
2123
Keep in mind that this is not a complete solution to EINTR. There is
2124
probably code in the Python standard library and other dependencies that
2125
may encounter EINTR if a signal arrives (and there is signal handler for
2126
that signal). So this function can reduce the impact for IO that bzrlib
2127
directly controls, but it is not a complete solution.
2129
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2133
except (IOError, OSError), e:
2134
if e.errno == errno.EINTR:
2139
def re_compile_checked(re_string, flags=0, where=""):
2140
"""Return a compiled re, or raise a sensible error.
2142
This should only be used when compiling user-supplied REs.
2144
:param re_string: Text form of regular expression.
2145
:param flags: eg re.IGNORECASE
2146
:param where: Message explaining to the user the context where
2147
it occurred, eg 'log search filter'.
2149
# from https://bugs.launchpad.net/bzr/+bug/251352
2151
re_obj = re.compile(re_string, flags)
2156
where = ' in ' + where
2157
# despite the name 'error' is a type
2158
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
2159
% (where, re_string, e))
2162
if sys.platform == "win32":
2165
return msvcrt.getch()
2170
fd = sys.stdin.fileno()
2171
settings = termios.tcgetattr(fd)
2174
ch = sys.stdin.read(1)
2176
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2180
if sys.platform == 'linux2':
2181
def _local_concurrency():
2183
prefix = 'processor'
2184
for line in file('/proc/cpuinfo', 'rb'):
2185
if line.startswith(prefix):
2186
concurrency = int(line[line.find(':')+1:]) + 1
2188
elif sys.platform == 'darwin':
2189
def _local_concurrency():
2190
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2191
stdout=subprocess.PIPE).communicate()[0]
2192
elif sys.platform[0:7] == 'freebsd':
2193
def _local_concurrency():
2194
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2195
stdout=subprocess.PIPE).communicate()[0]
2196
elif sys.platform == 'sunos5':
2197
def _local_concurrency():
2198
return subprocess.Popen(['psrinfo', '-p',],
2199
stdout=subprocess.PIPE).communicate()[0]
2200
elif sys.platform == "win32":
2201
def _local_concurrency():
2202
# This appears to return the number of cores.
2203
return os.environ.get('NUMBER_OF_PROCESSORS')
2205
def _local_concurrency():
2210
_cached_local_concurrency = None
2212
def local_concurrency(use_cache=True):
2213
"""Return how many processes can be run concurrently.
2215
Rely on platform specific implementations and default to 1 (one) if
2216
anything goes wrong.
2218
global _cached_local_concurrency
2220
if _cached_local_concurrency is not None and use_cache:
2221
return _cached_local_concurrency
2223
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2224
if concurrency is None:
2226
concurrency = _local_concurrency()
2227
except (OSError, IOError):
2230
concurrency = int(concurrency)
2231
except (TypeError, ValueError):
2234
_cached_concurrency = concurrency
2238
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2239
"""A stream writer that doesn't decode str arguments."""
2241
def __init__(self, encode, stream, errors='strict'):
2242
codecs.StreamWriter.__init__(self, stream, errors)
2243
self.encode = encode
2245
def write(self, object):
2246
if type(object) is str:
2247
self.stream.write(object)
2249
data, _ = self.encode(object, self.errors)
2250
self.stream.write(data)
2252
if sys.platform == 'win32':
2253
def open_file(filename, mode='r', bufsize=-1):
2254
"""This function is used to override the ``open`` builtin.
2256
But it uses O_NOINHERIT flag so the file handle is not inherited by
2257
child processes. Deleting or renaming a closed file opened with this
2258
function is not blocking child processes.
2260
writing = 'w' in mode
2261
appending = 'a' in mode
2262
updating = '+' in mode
2263
binary = 'b' in mode
2266
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2267
# for flags for each modes.
2277
flags |= os.O_WRONLY
2278
flags |= os.O_CREAT | os.O_TRUNC
2283
flags |= os.O_WRONLY
2284
flags |= os.O_CREAT | os.O_APPEND
2289
flags |= os.O_RDONLY
2291
return os.fdopen(os.open(filename, flags), mode, bufsize)
added
removed
bzrlib/osutils.py
