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)
26
25
from bzrlib.lazy_import import lazy_import
27
26
lazy_import(globals(), """
29
27
from datetime import datetime
31
from ntpath import (abspath as _nt_abspath,
33
normpath as _nt_normpath,
34
realpath as _nt_realpath,
35
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
44
from tempfile import (
40
from tempfile import mkdtemp
49
43
from bzrlib import (
51
from bzrlib.symbol_versioning import (
56
56
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
58
58
if sys.version_info < (2, 5):
71
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
74
83
# On win32, O_BINARY is used to indicate the file should
75
84
# be opened in binary mode, rather than text mode.
76
85
# On other platforms, O_BINARY doesn't exist, because
77
86
# they always open in binary mode, so it is okay to
78
# OR with 0 on those platforms
87
# OR with 0 on those platforms.
88
# O_NOINHERIT and O_TEXT exists only on win32 too.
79
89
O_BINARY = getattr(os, 'O_BINARY', 0)
90
O_TEXT = getattr(os, 'O_TEXT', 0)
91
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
82
94
def get_unicode_argv():
296
321
# /path => C:/path
297
322
path = unicode(path)
298
323
# check for absolute path
299
drive = _nt_splitdrive(path)[0]
324
drive = ntpath.splitdrive(path)[0]
300
325
if drive == '' and path[:2] not in('//','\\\\'):
301
326
cwd = os.getcwdu()
302
327
# we cannot simply os.path.join cwd and path
303
328
# because os.path.join('C:','/path') produce '/path'
304
329
# and this is incorrect
305
330
if path[:1] in ('/','\\'):
306
cwd = _nt_splitdrive(cwd)[0]
331
cwd = ntpath.splitdrive(cwd)[0]
308
333
path = cwd + '\\' + path
309
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
334
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
312
337
def _win32_realpath(path):
313
# Real _nt_realpath doesn't have a problem with a unicode cwd
314
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('\\', '/'))
317
342
def _win32_pathjoin(*args):
318
return _nt_join(*args).replace('\\', '/')
343
return ntpath.join(*args).replace('\\', '/')
321
346
def _win32_normpath(path):
322
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
347
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
325
350
def _win32_getcwd():
1294
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
1297
1427
def terminal_width():
1298
"""Return estimated terminal width."""
1299
if sys.platform == 'win32':
1300
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):
1303
1513
import struct, fcntl, termios
1304
1514
s = struct.pack('HHHH', 0, 0, 0, 0)
1305
1515
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1306
width = struct.unpack('HHHH', x)[1]
1516
height, width = struct.unpack('HHHH', x)[0:2]
1517
except (IOError, AttributeError):
1311
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
1320
1536
def supports_executable():
1745
1987
return socket.gethostname().decode(get_user_encoding())
1748
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):
1749
2024
"""Receive an exact number of bytes.
1751
2026
Regular Socket.recv() may return less than the requested number of bytes,
1752
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
1753
2028
on all platforms, but this should work everywhere. This will return
1754
2029
less than the requested amount if the remote end closes.
1756
2031
This isn't optimized and is intended mostly for use in testing.
1759
while len(b) < bytes:
1760
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))
1767
def send_all(socket, bytes, report_activity=None):
2042
def send_all(sock, bytes, report_activity=None):
1768
2043
"""Send all bytes on a socket.
1770
Regular socket.sendall() can give socket error 10053 on Windows. This
1771
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.
1773
2052
:param report_activity: Call this as bytes are read, see
1774
2053
Transport._report_activity
1777
for pos in xrange(0, len(bytes), chunk_size):
1778
block = bytes[pos:pos+chunk_size]
1779
if report_activity is not None:
1780
report_activity(len(block), 'write')
1781
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:
1784
2091
def dereference_path(path):
1960
2285
_cached_concurrency = concurrency
1961
2286
return 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
