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):
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
685
742
date_str = time.strftime(date_fmt, tt)
686
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
688
771
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
689
772
show_offset=True):
690
773
"""Return an unicode date string formatted according to the current locale.
847
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
851
995
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
996
except ImportError, e:
997
failed_to_load_extension(e)
853
998
from bzrlib._chunks_to_lines_py import chunks_to_lines
893
1038
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
1041
def delete_any(path):
902
"""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.
903
1066
if isdir(path): # Takes care of symlinks
1027
1211
# the target of a move, for example).
1028
1212
current = pathjoin(current, bit, *list(bit_iter))
1030
return current[len(abs_base)+1:]
1214
return current[len(abs_base):].lstrip('/')
1032
1216
# XXX - TODO - we need better detection/integration of case-insensitive
1033
# file-systems; Linux often sees FAT32 devices, for example, so could
1034
# probably benefit from the same basic support there. For now though, only
1035
# Windows gets that support, and it gets it for *all* file-systems!
1036
if sys.platform == "win32":
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'):
1037
1222
canonical_relpath = _cicp_canonical_relpath
1039
1224
canonical_relpath = relpath
1172
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.
1369
siginterrupt = signal.siginterrupt
1370
except AttributeError:
1371
# siginterrupt doesn't exist on this platform, or for this version
1373
siginterrupt = lambda signum, flag: None
1375
def sig_handler(*args):
1376
# Python resets the siginterrupt flag when a signal is
1377
# received. <http://bugs.python.org/issue8354>
1378
# As a workaround for some cases, set it back the way we want it.
1379
siginterrupt(signum, False)
1380
# Now run the handler function passed to set_signal_handler.
1383
sig_handler = handler
1384
old_handler = signal.signal(signum, sig_handler)
1386
siginterrupt(signum, False)
1390
default_terminal_width = 80
1391
"""The default terminal width for ttys.
1393
This is defined so that higher levels can share a common fallback value when
1394
terminal_width() returns None.
1175
1398
def terminal_width():
1176
"""Return estimated terminal width."""
1177
if sys.platform == 'win32':
1178
return win32utils.get_console_size()[0]
1399
"""Return terminal width.
1401
None is returned if the width can't established precisely.
1404
- if BZR_COLUMNS is set, returns its value
1405
- if there is no controlling terminal, returns None
1406
- if COLUMNS is set, returns its value,
1408
From there, we need to query the OS to get the size of the controlling
1412
- get termios.TIOCGWINSZ
1413
- if an error occurs or a negative value is obtained, returns None
1417
- win32utils.get_console_size() decides,
1418
- returns None on error (provided default value)
1421
# If BZR_COLUMNS is set, take it, user is always right
1423
return int(os.environ['BZR_COLUMNS'])
1424
except (KeyError, ValueError):
1427
isatty = getattr(sys.stdout, 'isatty', None)
1428
if isatty is None or not isatty():
1429
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1432
# If COLUMNS is set, take it, the terminal knows better (even inside a
1433
# given terminal, the application can decide to set COLUMNS to a lower
1434
# value (splitted screen) or a bigger value (scroll bars))
1436
return int(os.environ['COLUMNS'])
1437
except (KeyError, ValueError):
1440
width, height = _terminal_size(None, None)
1442
# Consider invalid values as meaning no width
1448
def _win32_terminal_size(width, height):
1449
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1450
return width, height
1453
def _ioctl_terminal_size(width, height):
1181
1455
import struct, fcntl, termios
1182
1456
s = struct.pack('HHHH', 0, 0, 0, 0)
1183
1457
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1184
width = struct.unpack('HHHH', x)[1]
1458
height, width = struct.unpack('HHHH', x)[0:2]
1459
except (IOError, AttributeError):
1189
width = int(os.environ['COLUMNS'])
1461
return width, height
1463
_terminal_size = None
1464
"""Returns the terminal size as (width, height).
1466
:param width: Default value for width.
1467
:param height: Default value for height.
1469
This is defined specifically for each OS and query the size of the controlling
1470
terminal. If any error occurs, the provided default values should be returned.
1472
if sys.platform == 'win32':
1473
_terminal_size = _win32_terminal_size
1475
_terminal_size = _ioctl_terminal_size
1478
def _terminal_size_changed(signum, frame):
1479
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1480
width, height = _terminal_size(None, None)
1481
if width is not None:
1482
os.environ['COLUMNS'] = str(width)
1485
_registered_sigwinch = False
1487
def watch_sigwinch():
1488
"""Register for SIGWINCH, once and only once."""
1489
global _registered_sigwinch
1490
if not _registered_sigwinch:
1491
if sys.platform == 'win32':
1492
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1493
# ReadConsoleInput but I've no idea how to plug that in
1494
# the current design -- vila 20091216
1497
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1498
_registered_sigwinch = True
1198
1501
def supports_executable():
1392
1695
# for win98 anyway.
1394
1697
from bzrlib._walkdirs_win32 import Win32ReadDir
1396
_selected_dir_reader = UnicodeDirReader()
1398
1698
_selected_dir_reader = Win32ReadDir()
1399
elif fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1701
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1400
1702
# ANSI_X3.4-1968 is a form of ASCII
1401
_selected_dir_reader = UnicodeDirReader()
1404
1704
from bzrlib._readdir_pyx import UTF8DirReader
1406
# No optimised code path
1407
_selected_dir_reader = UnicodeDirReader()
1409
1705
_selected_dir_reader = UTF8DirReader()
1706
except ImportError, e:
1707
failed_to_load_extension(e)
1710
if _selected_dir_reader is None:
1711
# Fallback to the python version
1712
_selected_dir_reader = UnicodeDirReader()
1410
1714
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1411
1715
# But we don't actually uses 1-3 in pending, so set them to None
1412
1716
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1517
1821
real_handlers[kind](abspath, relpath)
1824
def copy_ownership(dst, src=None):
1825
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1827
If src is None, the containing directory is used as source. If chown
1828
fails, the error is ignored and a warning is printed.
1830
chown = getattr(os, 'chown', None)
1835
src = os.path.dirname(dst)
1841
chown(dst, s.st_uid, s.st_gid)
1843
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1846
def mkdir_with_ownership(path, ownership_src=None):
1847
"""Create the directory 'path' with specified ownership.
1849
If ownership_src is given, copies (chown) usr/grp ownership
1850
from 'ownership_src' to 'path'. If ownership_src is None, use the
1851
containing dir ownership.
1854
copy_ownership(path, ownership_src)
1857
def open_with_ownership(filename, mode='r', bufsize=-1, ownership_src=None):
1858
"""Open the file 'filename' with the specified ownership.
1860
If ownership_src is specified, copy usr/grp ownership from ownership_src
1861
to filename. If ownership_src is None, copy ownership from containing
1863
Returns the opened file object.
1865
f = open(filename, mode, bufsize)
1866
copy_ownership(filename, ownership_src)
1520
1870
def path_prefix_key(path):
1521
1871
"""Generate a prefix-order path key for path.
1622
1972
return socket.gethostname().decode(get_user_encoding())
1625
def recv_all(socket, bytes):
1975
# We must not read/write any more than 64k at a time from/to a socket so we
1976
# don't risk "no buffer space available" errors on some platforms. Windows in
1977
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1979
MAX_SOCKET_CHUNK = 64 * 1024
1981
def read_bytes_from_socket(sock, report_activity=None,
1982
max_read_size=MAX_SOCKET_CHUNK):
1983
"""Read up to max_read_size of bytes from sock and notify of progress.
1985
Translates "Connection reset by peer" into file-like EOF (return an
1986
empty string rather than raise an error), and repeats the recv if
1987
interrupted by a signal.
1991
bytes = sock.recv(max_read_size)
1992
except socket.error, e:
1994
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1995
# The connection was closed by the other side. Callers expect
1996
# an empty string to signal end-of-stream.
1998
elif eno == errno.EINTR:
1999
# Retry the interrupted recv.
2003
if report_activity is not None:
2004
report_activity(len(bytes), 'read')
2008
def recv_all(socket, count):
1626
2009
"""Receive an exact number of bytes.
1628
2011
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
2012
depending on what's in the OS buffer. MSG_WAITALL is not available
1630
2013
on all platforms, but this should work everywhere. This will return
1631
2014
less than the requested amount if the remote end closes.
1633
2016
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))
2019
while len(b) < count:
2020
new = read_bytes_from_socket(socket, None, count - len(b))
1644
def send_all(socket, bytes, report_activity=None):
2027
def send_all(sock, bytes, report_activity=None):
1645
2028
"""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.
2030
Breaks large blocks in smaller chunks to avoid buffering limitations on
2031
some platforms, and catches EINTR which may be thrown if the send is
2032
interrupted by a signal.
2034
This is preferred to socket.sendall(), because it avoids portability bugs
2035
and provides activity reporting.
1650
2037
:param report_activity: Call this as bytes are read, see
1651
2038
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)
2041
byte_count = len(bytes)
2042
while sent_total < byte_count:
2044
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2045
except socket.error, e:
2046
if e.args[0] != errno.EINTR:
2050
report_activity(sent, 'write')
1661
2053
def dereference_path(path):
1780
2186
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2190
if sys.platform == 'linux2':
2191
def _local_concurrency():
2193
prefix = 'processor'
2194
for line in file('/proc/cpuinfo', 'rb'):
2195
if line.startswith(prefix):
2196
concurrency = int(line[line.find(':')+1:]) + 1
2198
elif sys.platform == 'darwin':
2199
def _local_concurrency():
2200
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2201
stdout=subprocess.PIPE).communicate()[0]
2202
elif sys.platform[0:7] == 'freebsd':
2203
def _local_concurrency():
2204
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2205
stdout=subprocess.PIPE).communicate()[0]
2206
elif sys.platform == 'sunos5':
2207
def _local_concurrency():
2208
return subprocess.Popen(['psrinfo', '-p',],
2209
stdout=subprocess.PIPE).communicate()[0]
2210
elif sys.platform == "win32":
2211
def _local_concurrency():
2212
# This appears to return the number of cores.
2213
return os.environ.get('NUMBER_OF_PROCESSORS')
2215
def _local_concurrency():
2220
_cached_local_concurrency = None
2222
def local_concurrency(use_cache=True):
2223
"""Return how many processes can be run concurrently.
2225
Rely on platform specific implementations and default to 1 (one) if
2226
anything goes wrong.
2228
global _cached_local_concurrency
2230
if _cached_local_concurrency is not None and use_cache:
2231
return _cached_local_concurrency
2233
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2234
if concurrency is None:
2236
concurrency = _local_concurrency()
2237
except (OSError, IOError):
2240
concurrency = int(concurrency)
2241
except (TypeError, ValueError):
2244
_cached_concurrency = concurrency
2248
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2249
"""A stream writer that doesn't decode str arguments."""
2251
def __init__(self, encode, stream, errors='strict'):
2252
codecs.StreamWriter.__init__(self, stream, errors)
2253
self.encode = encode
2255
def write(self, object):
2256
if type(object) is str:
2257
self.stream.write(object)
2259
data, _ = self.encode(object, self.errors)
2260
self.stream.write(data)
2262
if sys.platform == 'win32':
2263
def open_file(filename, mode='r', bufsize=-1):
2264
"""This function is used to override the ``open`` builtin.
2266
But it uses O_NOINHERIT flag so the file handle is not inherited by
2267
child processes. Deleting or renaming a closed file opened with this
2268
function is not blocking child processes.
2270
writing = 'w' in mode
2271
appending = 'a' in mode
2272
updating = '+' in mode
2273
binary = 'b' in mode
2276
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2277
# for flags for each modes.
2287
flags |= os.O_WRONLY
2288
flags |= os.O_CREAT | os.O_TRUNC
2293
flags |= os.O_WRONLY
2294
flags |= os.O_CREAT | os.O_APPEND
2299
flags |= os.O_RDONLY
2301
return os.fdopen(os.open(filename, flags), mode, bufsize)