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
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
25
25
from bzrlib.lazy_import import lazy_import
26
26
lazy_import(globals(), """
28
27
from datetime import datetime
30
from ntpath import (abspath as _nt_abspath,
32
normpath as _nt_normpath,
33
realpath as _nt_realpath,
34
splitdrive as _nt_splitdrive,
31
# We need to import both shutil and rmtree as we export the later on posix
32
# and need the former on windows
34
from shutil import rmtree
37
# We need to import both tempfile and mkdtemp as we export the later on posix
38
# and need the former on windows
42
from tempfile import (
40
from tempfile import mkdtemp
47
43
from bzrlib import (
51
from bzrlib.symbol_versioning import (
54
56
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
56
58
if sys.version_info < (2, 5):
69
71
from bzrlib import symbol_versioning
74
# Cross platform wall-clock time functionality with decent resolution.
75
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
76
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
77
# synchronized with ``time.time()``, this is only meant to be used to find
78
# delta times by subtracting from another call to this function.
79
timer_func = time.time
80
if sys.platform == 'win32':
81
timer_func = time.clock
72
83
# On win32, O_BINARY is used to indicate the file should
73
84
# be opened in binary mode, rather than text mode.
74
85
# On other platforms, O_BINARY doesn't exist, because
75
86
# they always open in binary mode, so it is okay to
76
# OR with 0 on those platforms
87
# OR with 0 on those platforms.
88
# O_NOINHERIT and O_TEXT exists only on win32 too.
77
89
O_BINARY = getattr(os, 'O_BINARY', 0)
90
O_TEXT = getattr(os, 'O_TEXT', 0)
91
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
94
def get_unicode_argv():
96
user_encoding = get_user_encoding()
97
return [a.decode(user_encoding) for a in sys.argv[1:]]
98
except UnicodeDecodeError:
99
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
80
103
def make_readonly(filename):
279
321
# /path => C:/path
280
322
path = unicode(path)
281
323
# check for absolute path
282
drive = _nt_splitdrive(path)[0]
324
drive = ntpath.splitdrive(path)[0]
283
325
if drive == '' and path[:2] not in('//','\\\\'):
284
326
cwd = os.getcwdu()
285
327
# we cannot simply os.path.join cwd and path
286
328
# because os.path.join('C:','/path') produce '/path'
287
329
# and this is incorrect
288
330
if path[:1] in ('/','\\'):
289
cwd = _nt_splitdrive(cwd)[0]
331
cwd = ntpath.splitdrive(cwd)[0]
291
333
path = cwd + '\\' + path
292
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
334
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
295
337
def _win32_realpath(path):
296
# Real _nt_realpath doesn't have a problem with a unicode cwd
297
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
338
# Real ntpath.realpath doesn't have a problem with a unicode cwd
339
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
300
342
def _win32_pathjoin(*args):
301
return _nt_join(*args).replace('\\', '/')
343
return ntpath.join(*args).replace('\\', '/')
304
346
def _win32_normpath(path):
305
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
347
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
308
350
def _win32_getcwd():
847
930
return pathjoin(*p)
933
def parent_directories(filename):
934
"""Return the list of parent directories, deepest first.
936
For example, parent_directories("a/b/c") -> ["a/b", "a"].
939
parts = splitpath(dirname(filename))
941
parents.append(joinpath(parts))
946
_extension_load_failures = []
949
def failed_to_load_extension(exception):
950
"""Handle failing to load a binary extension.
952
This should be called from the ImportError block guarding the attempt to
953
import the native extension. If this function returns, the pure-Python
954
implementation should be loaded instead::
957
>>> import bzrlib._fictional_extension_pyx
958
>>> except ImportError, e:
959
>>> bzrlib.osutils.failed_to_load_extension(e)
960
>>> import bzrlib._fictional_extension_py
962
# NB: This docstring is just an example, not a doctest, because doctest
963
# currently can't cope with the use of lazy imports in this namespace --
966
# This currently doesn't report the failure at the time it occurs, because
967
# they tend to happen very early in startup when we can't check config
968
# files etc, and also we want to report all failures but not spam the user
970
from bzrlib import trace
971
exception_str = str(exception)
972
if exception_str not in _extension_load_failures:
973
trace.mutter("failed to load compiled extension: %s" % exception_str)
974
_extension_load_failures.append(exception_str)
977
def report_extension_load_failures():
978
if not _extension_load_failures:
980
from bzrlib.config import GlobalConfig
981
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
983
# the warnings framework should by default show this only once
984
from bzrlib.trace import warning
986
"bzr: warning: some compiled extensions could not be loaded; "
987
"see <https://answers.launchpad.net/bzr/+faq/703>")
988
# we no longer show the specific missing extensions here, because it makes
989
# the message too long and scary - see
990
# https://bugs.launchpad.net/bzr/+bug/430529
851
994
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
995
except ImportError, e:
996
failed_to_load_extension(e)
853
997
from bzrlib._chunks_to_lines_py import chunks_to_lines
893
1037
shutil.copyfile(src, dest)
896
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
897
# Forgiveness than Permission (EAFP) because:
898
# - root can damage a solaris file system by using unlink,
899
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
900
# EACCES, OSX: EPERM) when invoked on a directory.
901
1040
def delete_any(path):
902
"""Delete a file or directory."""
1041
"""Delete a file, symlink or directory.
1043
Will delete even if readonly.
1046
_delete_file_or_dir(path)
1047
except (OSError, IOError), e:
1048
if e.errno in (errno.EPERM, errno.EACCES):
1049
# make writable and try again
1052
except (OSError, IOError):
1054
_delete_file_or_dir(path)
1059
def _delete_file_or_dir(path):
1060
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
1061
# Forgiveness than Permission (EAFP) because:
1062
# - root can damage a solaris file system by using unlink,
1063
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
1064
# EACCES, OSX: EPERM) when invoked on a directory.
903
1065
if isdir(path): # Takes care of symlinks
1047
1234
# but for now, we haven't optimized...
1048
1235
return [canonical_relpath(base, p) for p in paths]
1238
def decode_filename(filename):
1239
"""Decode the filename using the filesystem encoding
1241
If it is unicode, it is returned.
1242
Otherwise it is decoded from the the filesystem's encoding. If decoding
1243
fails, a errors.BadFilenameEncoding exception is raised.
1245
if type(filename) is unicode:
1248
return filename.decode(_fs_enc)
1249
except UnicodeDecodeError:
1250
raise errors.BadFilenameEncoding(filename, _fs_enc)
1050
1253
def safe_unicode(unicode_or_utf8_string):
1051
1254
"""Coerce unicode_or_utf8_string into unicode.
1053
1256
If it is unicode, it is returned.
1054
Otherwise it is decoded from utf-8. If a decoding error
1055
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
1056
as a BzrBadParameter exception.
1257
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1258
wrapped in a BzrBadParameterNotUnicode exception.
1058
1260
if isinstance(unicode_or_utf8_string, unicode):
1059
1261
return unicode_or_utf8_string
1172
1374
normalized_filename = _inaccessible_normalized_filename
1377
def set_signal_handler(signum, handler, restart_syscall=True):
1378
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1379
on platforms that support that.
1381
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1382
automatically restart (by calling `signal.siginterrupt(signum,
1383
False)`). May be ignored if the feature is not available on this
1384
platform or Python version.
1388
siginterrupt = signal.siginterrupt
1390
# This python implementation doesn't provide signal support, hence no
1393
except AttributeError:
1394
# siginterrupt doesn't exist on this platform, or for this version
1396
siginterrupt = lambda signum, flag: None
1398
def sig_handler(*args):
1399
# Python resets the siginterrupt flag when a signal is
1400
# received. <http://bugs.python.org/issue8354>
1401
# As a workaround for some cases, set it back the way we want it.
1402
siginterrupt(signum, False)
1403
# Now run the handler function passed to set_signal_handler.
1406
sig_handler = handler
1407
old_handler = signal.signal(signum, sig_handler)
1409
siginterrupt(signum, False)
1413
default_terminal_width = 80
1414
"""The default terminal width for ttys.
1416
This is defined so that higher levels can share a common fallback value when
1417
terminal_width() returns None.
1420
# Keep some state so that terminal_width can detect if _terminal_size has
1421
# returned a different size since the process started. See docstring and
1422
# comments of terminal_width for details.
1423
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1424
_terminal_size_state = 'no_data'
1425
_first_terminal_size = None
1175
1427
def terminal_width():
1176
"""Return estimated terminal width."""
1177
if sys.platform == 'win32':
1178
return win32utils.get_console_size()[0]
1428
"""Return terminal width.
1430
None is returned if the width can't established precisely.
1433
- if BZR_COLUMNS is set, returns its value
1434
- if there is no controlling terminal, returns None
1435
- query the OS, if the queried size has changed since the last query,
1437
- if COLUMNS is set, returns its value,
1438
- if the OS has a value (even though it's never changed), return its value.
1440
From there, we need to query the OS to get the size of the controlling
1443
On Unices we query the OS by:
1444
- get termios.TIOCGWINSZ
1445
- if an error occurs or a negative value is obtained, returns None
1447
On Windows we query the OS by:
1448
- win32utils.get_console_size() decides,
1449
- returns None on error (provided default value)
1451
# Note to implementors: if changing the rules for determining the width,
1452
# make sure you've considered the behaviour in these cases:
1453
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1454
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1456
# - (add more interesting cases here, if you find any)
1457
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1458
# but we don't want to register a signal handler because it is impossible
1459
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1460
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1461
# time so we can notice if the reported size has changed, which should have
1464
# If BZR_COLUMNS is set, take it, user is always right
1466
return int(os.environ['BZR_COLUMNS'])
1467
except (KeyError, ValueError):
1470
isatty = getattr(sys.stdout, 'isatty', None)
1471
if isatty is None or not isatty():
1472
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1476
width, height = os_size = _terminal_size(None, None)
1477
global _first_terminal_size, _terminal_size_state
1478
if _terminal_size_state == 'no_data':
1479
_first_terminal_size = os_size
1480
_terminal_size_state = 'unchanged'
1481
elif (_terminal_size_state == 'unchanged' and
1482
_first_terminal_size != os_size):
1483
_terminal_size_state = 'changed'
1485
# If the OS claims to know how wide the terminal is, and this value has
1486
# ever changed, use that.
1487
if _terminal_size_state == 'changed':
1488
if width is not None and width > 0:
1491
# If COLUMNS is set, use it.
1493
return int(os.environ['COLUMNS'])
1494
except (KeyError, ValueError):
1497
# Finally, use an unchanged size from the OS, if we have one.
1498
if _terminal_size_state == 'unchanged':
1499
if width is not None and width > 0:
1502
# The width could not be determined.
1506
def _win32_terminal_size(width, height):
1507
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1508
return width, height
1511
def _ioctl_terminal_size(width, height):
1181
1513
import struct, fcntl, termios
1182
1514
s = struct.pack('HHHH', 0, 0, 0, 0)
1183
1515
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1184
width = struct.unpack('HHHH', x)[1]
1516
height, width = struct.unpack('HHHH', x)[0:2]
1517
except (IOError, AttributeError):
1189
width = int(os.environ['COLUMNS'])
1519
return width, height
1521
_terminal_size = None
1522
"""Returns the terminal size as (width, height).
1524
:param width: Default value for width.
1525
:param height: Default value for height.
1527
This is defined specifically for each OS and query the size of the controlling
1528
terminal. If any error occurs, the provided default values should be returned.
1530
if sys.platform == 'win32':
1531
_terminal_size = _win32_terminal_size
1533
_terminal_size = _ioctl_terminal_size
1198
1536
def supports_executable():
1622
1987
return socket.gethostname().decode(get_user_encoding())
1625
def recv_all(socket, bytes):
1990
# We must not read/write any more than 64k at a time from/to a socket so we
1991
# don't risk "no buffer space available" errors on some platforms. Windows in
1992
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1994
MAX_SOCKET_CHUNK = 64 * 1024
1996
def read_bytes_from_socket(sock, report_activity=None,
1997
max_read_size=MAX_SOCKET_CHUNK):
1998
"""Read up to max_read_size of bytes from sock and notify of progress.
2000
Translates "Connection reset by peer" into file-like EOF (return an
2001
empty string rather than raise an error), and repeats the recv if
2002
interrupted by a signal.
2006
bytes = sock.recv(max_read_size)
2007
except socket.error, e:
2009
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2010
# The connection was closed by the other side. Callers expect
2011
# an empty string to signal end-of-stream.
2013
elif eno == errno.EINTR:
2014
# Retry the interrupted recv.
2018
if report_activity is not None:
2019
report_activity(len(bytes), 'read')
2023
def recv_all(socket, count):
1626
2024
"""Receive an exact number of bytes.
1628
2026
Regular Socket.recv() may return less than the requested number of bytes,
1629
dependning on what's in the OS buffer. MSG_WAITALL is not available
2027
depending on what's in the OS buffer. MSG_WAITALL is not available
1630
2028
on all platforms, but this should work everywhere. This will return
1631
2029
less than the requested amount if the remote end closes.
1633
2031
This isn't optimized and is intended mostly for use in testing.
1636
while len(b) < bytes:
1637
new = until_no_eintr(socket.recv, bytes - len(b))
2034
while len(b) < count:
2035
new = read_bytes_from_socket(socket, None, count - len(b))
1644
def send_all(socket, bytes, report_activity=None):
2042
def send_all(sock, bytes, report_activity=None):
1645
2043
"""Send all bytes on a socket.
1647
Regular socket.sendall() can give socket error 10053 on Windows. This
1648
implementation sends no more than 64k at a time, which avoids this problem.
2045
Breaks large blocks in smaller chunks to avoid buffering limitations on
2046
some platforms, and catches EINTR which may be thrown if the send is
2047
interrupted by a signal.
2049
This is preferred to socket.sendall(), because it avoids portability bugs
2050
and provides activity reporting.
1650
2052
:param report_activity: Call this as bytes are read, see
1651
2053
Transport._report_activity
1654
for pos in xrange(0, len(bytes), chunk_size):
1655
block = bytes[pos:pos+chunk_size]
1656
if report_activity is not None:
1657
report_activity(len(block), 'write')
1658
until_no_eintr(socket.sendall, block)
2056
byte_count = len(bytes)
2057
while sent_total < byte_count:
2059
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2060
except socket.error, e:
2061
if e.args[0] != errno.EINTR:
2065
report_activity(sent, 'write')
2068
def connect_socket(address):
2069
# Slight variation of the socket.create_connection() function (provided by
2070
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2071
# provide it for previous python versions. Also, we don't use the timeout
2072
# parameter (provided by the python implementation) so we don't implement
2074
err = socket.error('getaddrinfo returns an empty list')
2075
host, port = address
2076
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2077
af, socktype, proto, canonname, sa = res
2080
sock = socket.socket(af, socktype, proto)
2084
except socket.error, err:
2085
# 'err' is now the most recent error
2086
if sock is not None:
1661
2091
def dereference_path(path):
1780
2227
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2231
if sys.platform == 'linux2':
2232
def _local_concurrency():
2234
prefix = 'processor'
2235
for line in file('/proc/cpuinfo', 'rb'):
2236
if line.startswith(prefix):
2237
concurrency = int(line[line.find(':')+1:]) + 1
2239
elif sys.platform == 'darwin':
2240
def _local_concurrency():
2241
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2242
stdout=subprocess.PIPE).communicate()[0]
2243
elif sys.platform[0:7] == 'freebsd':
2244
def _local_concurrency():
2245
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2246
stdout=subprocess.PIPE).communicate()[0]
2247
elif sys.platform == 'sunos5':
2248
def _local_concurrency():
2249
return subprocess.Popen(['psrinfo', '-p',],
2250
stdout=subprocess.PIPE).communicate()[0]
2251
elif sys.platform == "win32":
2252
def _local_concurrency():
2253
# This appears to return the number of cores.
2254
return os.environ.get('NUMBER_OF_PROCESSORS')
2256
def _local_concurrency():
2261
_cached_local_concurrency = None
2263
def local_concurrency(use_cache=True):
2264
"""Return how many processes can be run concurrently.
2266
Rely on platform specific implementations and default to 1 (one) if
2267
anything goes wrong.
2269
global _cached_local_concurrency
2271
if _cached_local_concurrency is not None and use_cache:
2272
return _cached_local_concurrency
2274
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2275
if concurrency is None:
2277
concurrency = _local_concurrency()
2278
except (OSError, IOError):
2281
concurrency = int(concurrency)
2282
except (TypeError, ValueError):
2285
_cached_concurrency = concurrency
2289
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2290
"""A stream writer that doesn't decode str arguments."""
2292
def __init__(self, encode, stream, errors='strict'):
2293
codecs.StreamWriter.__init__(self, stream, errors)
2294
self.encode = encode
2296
def write(self, object):
2297
if type(object) is str:
2298
self.stream.write(object)
2300
data, _ = self.encode(object, self.errors)
2301
self.stream.write(data)
2303
if sys.platform == 'win32':
2304
def open_file(filename, mode='r', bufsize=-1):
2305
"""This function is used to override the ``open`` builtin.
2307
But it uses O_NOINHERIT flag so the file handle is not inherited by
2308
child processes. Deleting or renaming a closed file opened with this
2309
function is not blocking child processes.
2311
writing = 'w' in mode
2312
appending = 'a' in mode
2313
updating = '+' in mode
2314
binary = 'b' in mode
2317
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2318
# for flags for each modes.
2328
flags |= os.O_WRONLY
2329
flags |= os.O_CREAT | os.O_TRUNC
2334
flags |= os.O_WRONLY
2335
flags |= os.O_CREAT | os.O_APPEND
2340
flags |= os.O_RDONLY
2342
return os.fdopen(os.open(filename, flags), mode, bufsize)
2347
def getuser_unicode():
2348
"""Return the username as unicode.
2351
user_encoding = get_user_encoding()
2352
username = getpass.getuser().decode(user_encoding)
2353
except UnicodeDecodeError:
2354
raise errors.BzrError("Can't decode username as %s." % \
added
removed
bzrlib/osutils.py
