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
17
from __future__ import absolute_import
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
25
27
from bzrlib.lazy_import import lazy_import
26
28
lazy_import(globals(), """
28
29
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,
34
# We need to import both shutil and rmtree as we export the later on posix
35
# and need the former on windows
37
from shutil import rmtree
40
# We need to import both tempfile and mkdtemp as we export the later on posix
41
# and need the former on windows
43
from tempfile import (
43
from tempfile import mkdtemp
48
46
from bzrlib import (
53
from bzrlib.i18n import gettext
55
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
57
if sys.version_info < (2, 5):
58
import md5 as _mod_md5
60
import sha as _mod_sha
56
from bzrlib.symbol_versioning import (
70
from bzrlib import symbol_versioning
68
from bzrlib import symbol_versioning, _fs_enc
71
# Cross platform wall-clock time functionality with decent resolution.
72
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
73
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
74
# synchronized with ``time.time()``, this is only meant to be used to find
75
# delta times by subtracting from another call to this function.
76
timer_func = time.time
77
if sys.platform == 'win32':
78
timer_func = time.clock
73
80
# On win32, O_BINARY is used to indicate the file should
74
81
# be opened in binary mode, rather than text mode.
75
82
# On other platforms, O_BINARY doesn't exist, because
76
83
# they always open in binary mode, so it is okay to
77
# OR with 0 on those platforms
84
# OR with 0 on those platforms.
85
# O_NOINHERIT and O_TEXT exists only on win32 too.
78
86
O_BINARY = getattr(os, 'O_BINARY', 0)
87
O_TEXT = getattr(os, 'O_TEXT', 0)
88
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
81
91
def get_unicode_argv():
92
102
mod = os.lstat(filename).st_mode
93
103
if not stat.S_ISLNK(mod):
94
104
mod = mod & 0777555
95
os.chmod(filename, mod)
105
chmod_if_possible(filename, mod)
98
108
def make_writable(filename):
99
109
mod = os.lstat(filename).st_mode
100
110
if not stat.S_ISLNK(mod):
102
os.chmod(filename, mod)
112
chmod_if_possible(filename, mod)
115
def chmod_if_possible(filename, mode):
116
# Set file mode if that can be safely done.
117
# Sometimes even on unix the filesystem won't allow it - see
118
# https://bugs.launchpad.net/bzr/+bug/606537
120
# It is probably faster to just do the chmod, rather than
121
# doing a stat, and then trying to compare
122
os.chmod(filename, mode)
123
except (IOError, OSError),e:
124
# Permission/access denied seems to commonly happen on smbfs; there's
125
# probably no point warning about it.
126
# <https://bugs.launchpad.net/bzr/+bug/606537>
127
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
128
trace.mutter("ignore error on chmod of %r: %r" % (
105
134
def minimum_path_selection(paths):
244
284
unlink_func(tmp_name)
246
286
rename_func(tmp_name, new)
287
if failure_exc is not None:
289
raise failure_exc[0], failure_exc[1], failure_exc[2]
249
294
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
250
295
# choke on a Unicode string containing a relative path if
251
296
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
253
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
254
298
def _posix_abspath(path):
255
299
# jam 20060426 rather than encoding to fsencoding
256
300
# copy posixpath.abspath, but use os.getcwdu instead
257
301
if not posixpath.isabs(path):
258
302
path = posixpath.join(getcwd(), path)
259
return posixpath.normpath(path)
303
return _posix_normpath(path)
262
306
def _posix_realpath(path):
263
307
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
310
def _posix_normpath(path):
311
path = posixpath.normpath(path)
312
# Bug 861008: posixpath.normpath() returns a path normalized according to
313
# the POSIX standard, which stipulates (for compatibility reasons) that two
314
# leading slashes must not be simplified to one, and only if there are 3 or
315
# more should they be simplified as one. So we treat the leading 2 slashes
316
# as a special case here by simply removing the first slash, as we consider
317
# that breaking POSIX compatibility for this obscure feature is acceptable.
318
# This is not a paranoid precaution, as we notably get paths like this when
319
# the repo is hosted at the root of the filesystem, i.e. in "/".
320
if path.startswith('//'):
325
def _posix_path_from_environ(key):
326
"""Get unicode path from `key` in environment or None if not present
328
Note that posix systems use arbitrary byte strings for filesystem objects,
329
so a path that raises BadFilenameEncoding here may still be accessible.
331
val = os.environ.get(key, None)
335
return val.decode(_fs_enc)
336
except UnicodeDecodeError:
337
# GZ 2011-12-12:Ideally want to include `key` in the exception message
338
raise errors.BadFilenameEncoding(val, _fs_enc)
341
def _posix_getuser_unicode():
342
"""Get username from environment or password database as unicode"""
343
name = getpass.getuser()
344
user_encoding = get_user_encoding()
346
return name.decode(user_encoding)
347
except UnicodeDecodeError:
348
raise errors.BzrError("Encoding of username %r is unsupported by %s "
349
"application locale." % (name, user_encoding))
266
352
def _win32_fixdrive(path):
267
353
"""Force drive letters to be consistent.
295
381
# /path => C:/path
296
382
path = unicode(path)
297
383
# check for absolute path
298
drive = _nt_splitdrive(path)[0]
384
drive = ntpath.splitdrive(path)[0]
299
385
if drive == '' and path[:2] not in('//','\\\\'):
300
386
cwd = os.getcwdu()
301
387
# we cannot simply os.path.join cwd and path
302
388
# because os.path.join('C:','/path') produce '/path'
303
389
# and this is incorrect
304
390
if path[:1] in ('/','\\'):
305
cwd = _nt_splitdrive(cwd)[0]
391
cwd = ntpath.splitdrive(cwd)[0]
307
393
path = cwd + '\\' + path
308
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
394
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
311
397
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('\\', '/'))
398
# Real ntpath.realpath doesn't have a problem with a unicode cwd
399
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
316
402
def _win32_pathjoin(*args):
317
return _nt_join(*args).replace('\\', '/')
403
return ntpath.join(*args).replace('\\', '/')
320
406
def _win32_normpath(path):
321
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
407
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
324
410
def _win32_getcwd():
1024
_extension_load_failures = []
1027
def failed_to_load_extension(exception):
1028
"""Handle failing to load a binary extension.
1030
This should be called from the ImportError block guarding the attempt to
1031
import the native extension. If this function returns, the pure-Python
1032
implementation should be loaded instead::
1035
>>> import bzrlib._fictional_extension_pyx
1036
>>> except ImportError, e:
1037
>>> bzrlib.osutils.failed_to_load_extension(e)
1038
>>> import bzrlib._fictional_extension_py
1040
# NB: This docstring is just an example, not a doctest, because doctest
1041
# currently can't cope with the use of lazy imports in this namespace --
1044
# This currently doesn't report the failure at the time it occurs, because
1045
# they tend to happen very early in startup when we can't check config
1046
# files etc, and also we want to report all failures but not spam the user
1048
exception_str = str(exception)
1049
if exception_str not in _extension_load_failures:
1050
trace.mutter("failed to load compiled extension: %s" % exception_str)
1051
_extension_load_failures.append(exception_str)
1054
def report_extension_load_failures():
1055
if not _extension_load_failures:
1057
if config.GlobalStack().get('ignore_missing_extensions'):
1059
# the warnings framework should by default show this only once
1060
from bzrlib.trace import warning
1062
"bzr: warning: some compiled extensions could not be loaded; "
1063
"see <https://answers.launchpad.net/bzr/+faq/703>")
1064
# we no longer show the specific missing extensions here, because it makes
1065
# the message too long and scary - see
1066
# https://bugs.launchpad.net/bzr/+bug/430529
885
1070
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1071
except ImportError, e:
1072
failed_to_load_extension(e)
887
1073
from bzrlib._chunks_to_lines_py import chunks_to_lines
927
1113
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
1116
def delete_any(path):
936
"""Delete a file or directory."""
1117
"""Delete a file, symlink or directory.
1119
Will delete even if readonly.
1122
_delete_file_or_dir(path)
1123
except (OSError, IOError), e:
1124
if e.errno in (errno.EPERM, errno.EACCES):
1125
# make writable and try again
1128
except (OSError, IOError):
1130
_delete_file_or_dir(path)
1135
def _delete_file_or_dir(path):
1136
# Look Before You Leap (LBYL) is appropriate here instead of Easier to Ask for
1137
# Forgiveness than Permission (EAFP) because:
1138
# - root can damage a solaris file system by using unlink,
1139
# - unlink raises different exceptions on different OSes (linux: EISDIR, win32:
1140
# EACCES, OSX: EPERM) when invoked on a directory.
937
1141
if isdir(path): # Takes care of symlinks
1220
1450
normalized_filename = _inaccessible_normalized_filename
1453
def set_signal_handler(signum, handler, restart_syscall=True):
1454
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1455
on platforms that support that.
1457
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1458
automatically restart (by calling `signal.siginterrupt(signum,
1459
False)`). May be ignored if the feature is not available on this
1460
platform or Python version.
1464
siginterrupt = signal.siginterrupt
1466
# This python implementation doesn't provide signal support, hence no
1469
except AttributeError:
1470
# siginterrupt doesn't exist on this platform, or for this version
1472
siginterrupt = lambda signum, flag: None
1474
def sig_handler(*args):
1475
# Python resets the siginterrupt flag when a signal is
1476
# received. <http://bugs.python.org/issue8354>
1477
# As a workaround for some cases, set it back the way we want it.
1478
siginterrupt(signum, False)
1479
# Now run the handler function passed to set_signal_handler.
1482
sig_handler = handler
1483
old_handler = signal.signal(signum, sig_handler)
1485
siginterrupt(signum, False)
1489
default_terminal_width = 80
1490
"""The default terminal width for ttys.
1492
This is defined so that higher levels can share a common fallback value when
1493
terminal_width() returns None.
1496
# Keep some state so that terminal_width can detect if _terminal_size has
1497
# returned a different size since the process started. See docstring and
1498
# comments of terminal_width for details.
1499
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1500
_terminal_size_state = 'no_data'
1501
_first_terminal_size = None
1223
1503
def terminal_width():
1224
"""Return estimated terminal width."""
1225
if sys.platform == 'win32':
1226
return win32utils.get_console_size()[0]
1504
"""Return terminal width.
1506
None is returned if the width can't established precisely.
1509
- if BZR_COLUMNS is set, returns its value
1510
- if there is no controlling terminal, returns None
1511
- query the OS, if the queried size has changed since the last query,
1513
- if COLUMNS is set, returns its value,
1514
- if the OS has a value (even though it's never changed), return its value.
1516
From there, we need to query the OS to get the size of the controlling
1519
On Unices we query the OS by:
1520
- get termios.TIOCGWINSZ
1521
- if an error occurs or a negative value is obtained, returns None
1523
On Windows we query the OS by:
1524
- win32utils.get_console_size() decides,
1525
- returns None on error (provided default value)
1527
# Note to implementors: if changing the rules for determining the width,
1528
# make sure you've considered the behaviour in these cases:
1529
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1530
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1532
# - (add more interesting cases here, if you find any)
1533
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1534
# but we don't want to register a signal handler because it is impossible
1535
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1536
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1537
# time so we can notice if the reported size has changed, which should have
1540
# If BZR_COLUMNS is set, take it, user is always right
1541
# Except if they specified 0 in which case, impose no limit here
1543
width = int(os.environ['BZR_COLUMNS'])
1544
except (KeyError, ValueError):
1546
if width is not None:
1552
isatty = getattr(sys.stdout, 'isatty', None)
1553
if isatty is None or not isatty():
1554
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1558
width, height = os_size = _terminal_size(None, None)
1559
global _first_terminal_size, _terminal_size_state
1560
if _terminal_size_state == 'no_data':
1561
_first_terminal_size = os_size
1562
_terminal_size_state = 'unchanged'
1563
elif (_terminal_size_state == 'unchanged' and
1564
_first_terminal_size != os_size):
1565
_terminal_size_state = 'changed'
1567
# If the OS claims to know how wide the terminal is, and this value has
1568
# ever changed, use that.
1569
if _terminal_size_state == 'changed':
1570
if width is not None and width > 0:
1573
# If COLUMNS is set, use it.
1575
return int(os.environ['COLUMNS'])
1576
except (KeyError, ValueError):
1579
# Finally, use an unchanged size from the OS, if we have one.
1580
if _terminal_size_state == 'unchanged':
1581
if width is not None and width > 0:
1584
# The width could not be determined.
1588
def _win32_terminal_size(width, height):
1589
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1590
return width, height
1593
def _ioctl_terminal_size(width, height):
1229
1595
import struct, fcntl, termios
1230
1596
s = struct.pack('HHHH', 0, 0, 0, 0)
1231
1597
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1232
width = struct.unpack('HHHH', x)[1]
1598
height, width = struct.unpack('HHHH', x)[0:2]
1599
except (IOError, AttributeError):
1237
width = int(os.environ['COLUMNS'])
1601
return width, height
1603
_terminal_size = None
1604
"""Returns the terminal size as (width, height).
1606
:param width: Default value for width.
1607
:param height: Default value for height.
1609
This is defined specifically for each OS and query the size of the controlling
1610
terminal. If any error occurs, the provided default values should be returned.
1612
if sys.platform == 'win32':
1613
_terminal_size = _win32_terminal_size
1615
_terminal_size = _ioctl_terminal_size
1246
1618
def supports_executable():
1670
2092
return socket.gethostname().decode(get_user_encoding())
1673
def recv_all(socket, bytes):
2095
# We must not read/write any more than 64k at a time from/to a socket so we
2096
# don't risk "no buffer space available" errors on some platforms. Windows in
2097
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2099
MAX_SOCKET_CHUNK = 64 * 1024
2101
_end_of_stream_errors = [errno.ECONNRESET]
2102
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2103
_eno = getattr(errno, _eno, None)
2104
if _eno is not None:
2105
_end_of_stream_errors.append(_eno)
2109
def read_bytes_from_socket(sock, report_activity=None,
2110
max_read_size=MAX_SOCKET_CHUNK):
2111
"""Read up to max_read_size of bytes from sock and notify of progress.
2113
Translates "Connection reset by peer" into file-like EOF (return an
2114
empty string rather than raise an error), and repeats the recv if
2115
interrupted by a signal.
2119
bytes = sock.recv(max_read_size)
2120
except socket.error, e:
2122
if eno in _end_of_stream_errors:
2123
# The connection was closed by the other side. Callers expect
2124
# an empty string to signal end-of-stream.
2126
elif eno == errno.EINTR:
2127
# Retry the interrupted recv.
2131
if report_activity is not None:
2132
report_activity(len(bytes), 'read')
2136
def recv_all(socket, count):
1674
2137
"""Receive an exact number of bytes.
1676
2139
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
2140
depending on what's in the OS buffer. MSG_WAITALL is not available
1678
2141
on all platforms, but this should work everywhere. This will return
1679
2142
less than the requested amount if the remote end closes.
1681
2144
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))
2147
while len(b) < count:
2148
new = read_bytes_from_socket(socket, None, count - len(b))
1692
def send_all(socket, bytes, report_activity=None):
2155
def send_all(sock, bytes, report_activity=None):
1693
2156
"""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.
2158
Breaks large blocks in smaller chunks to avoid buffering limitations on
2159
some platforms, and catches EINTR which may be thrown if the send is
2160
interrupted by a signal.
2162
This is preferred to socket.sendall(), because it avoids portability bugs
2163
and provides activity reporting.
1698
2165
:param report_activity: Call this as bytes are read, see
1699
2166
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)
2169
byte_count = len(bytes)
2170
while sent_total < byte_count:
2172
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2173
except socket.error, e:
2174
if e.args[0] != errno.EINTR:
2178
report_activity(sent, 'write')
2181
def connect_socket(address):
2182
# Slight variation of the socket.create_connection() function (provided by
2183
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2184
# provide it for previous python versions. Also, we don't use the timeout
2185
# parameter (provided by the python implementation) so we don't implement
2187
err = socket.error('getaddrinfo returns an empty list')
2188
host, port = address
2189
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2190
af, socktype, proto, canonname, sa = res
2193
sock = socket.socket(af, socktype, proto)
2197
except socket.error, err:
2198
# 'err' is now the most recent error
2199
if sock is not None:
1709
2204
def dereference_path(path):
1761
2258
from bzrlib._readdir_pyx import UTF8DirReader
1762
2259
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2260
except ImportError, e:
2261
# This is one time where we won't warn that an extension failed to
2262
# load. The extension is never available on Windows anyway.
1764
2263
from bzrlib._readdir_py import (
1765
2264
_kind_from_mode as file_kind_from_stat_mode
1767
2266
return file_kind_from_stat_mode(mode)
1768
2267
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1771
def file_kind(f, _lstat=os.lstat):
2269
def file_stat(f, _lstat=os.lstat):
1773
return file_kind_from_stat_mode(_lstat(f).st_mode)
1774
2273
except OSError, e:
1775
2274
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1776
2275
raise errors.NoSuchFile(f)
2278
def file_kind(f, _lstat=os.lstat):
2279
stat_value = file_stat(f, _lstat)
2280
return file_kind_from_stat_mode(stat_value.st_mode)
1780
2282
def until_no_eintr(f, *a, **kw):
1781
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2283
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2285
WARNING: you must be certain that it is safe to retry the call repeatedly
2286
if EINTR does occur. This is typically only true for low-level operations
2287
like os.read. If in any doubt, don't use this.
2289
Keep in mind that this is not a complete solution to EINTR. There is
2290
probably code in the Python standard library and other dependencies that
2291
may encounter EINTR if a signal arrives (and there is signal handler for
2292
that signal). So this function can reduce the impact for IO that bzrlib
2293
directly controls, but it is not a complete solution.
1782
2295
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
1883
2405
_cached_concurrency = concurrency
1884
2406
return concurrency
2409
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2410
"""A stream writer that doesn't decode str arguments."""
2412
def __init__(self, encode, stream, errors='strict'):
2413
codecs.StreamWriter.__init__(self, stream, errors)
2414
self.encode = encode
2416
def write(self, object):
2417
if type(object) is str:
2418
self.stream.write(object)
2420
data, _ = self.encode(object, self.errors)
2421
self.stream.write(data)
2423
if sys.platform == 'win32':
2424
def open_file(filename, mode='r', bufsize=-1):
2425
"""This function is used to override the ``open`` builtin.
2427
But it uses O_NOINHERIT flag so the file handle is not inherited by
2428
child processes. Deleting or renaming a closed file opened with this
2429
function is not blocking child processes.
2431
writing = 'w' in mode
2432
appending = 'a' in mode
2433
updating = '+' in mode
2434
binary = 'b' in mode
2437
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2438
# for flags for each modes.
2448
flags |= os.O_WRONLY
2449
flags |= os.O_CREAT | os.O_TRUNC
2454
flags |= os.O_WRONLY
2455
flags |= os.O_CREAT | os.O_APPEND
2460
flags |= os.O_RDONLY
2462
return os.fdopen(os.open(filename, flags), mode, bufsize)
2467
def available_backup_name(base, exists):
2468
"""Find a non-existing backup file name.
2470
This will *not* create anything, this only return a 'free' entry. This
2471
should be used for checking names in a directory below a locked
2472
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2473
Leap) and generally discouraged.
2475
:param base: The base name.
2477
:param exists: A callable returning True if the path parameter exists.
2480
name = "%s.~%d~" % (base, counter)
2483
name = "%s.~%d~" % (base, counter)
2487
def set_fd_cloexec(fd):
2488
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2489
support for this is not available.
2493
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2494
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2495
except (ImportError, AttributeError):
2496
# Either the fcntl module or specific constants are not present
2500
def find_executable_on_path(name):
2501
"""Finds an executable on the PATH.
2503
On Windows, this will try to append each extension in the PATHEXT
2504
environment variable to the name, if it cannot be found with the name
2507
:param name: The base name of the executable.
2508
:return: The path to the executable found or None.
2510
path = os.environ.get('PATH')
2513
path = path.split(os.pathsep)
2514
if sys.platform == 'win32':
2515
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2516
exts = [ext.lower() for ext in exts]
2517
base, ext = os.path.splitext(name)
2519
if ext.lower() not in exts:
2527
f = os.path.join(d, name) + ext
2528
if os.access(f, os.X_OK):
2533
def _posix_is_local_pid_dead(pid):
2534
"""True if pid doesn't correspond to live process on this machine"""
2536
# Special meaning of unix kill: just check if it's there.
2539
if e.errno == errno.ESRCH:
2540
# On this machine, and really not found: as sure as we can be
2543
elif e.errno == errno.EPERM:
2544
# exists, though not ours
2547
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2548
# Don't really know.
2551
# Exists and our process: not dead.
2554
if sys.platform == "win32":
2555
is_local_pid_dead = win32utils.is_local_pid_dead
2557
is_local_pid_dead = _posix_is_local_pid_dead
2560
def fdatasync(fileno):
2561
"""Flush file contents to disk if possible.
2563
:param fileno: Integer OS file handle.
2564
:raises TransportNotPossible: If flushing to disk is not possible.
2566
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2571
def ensure_empty_directory_exists(path, exception_class):
2572
"""Make sure a local directory exists and is empty.
2574
If it does not exist, it is created. If it exists and is not empty, an
2575
instance of exception_class is raised.
2580
if e.errno != errno.EEXIST:
2582
if os.listdir(path) != []:
2583
raise exception_class(path)
2586
def is_environment_error(evalue):
2587
"""True if exception instance is due to a process environment issue
2589
This includes OSError and IOError, but also other errors that come from
2590
the operating system or core libraries but are not subclasses of those.
2592
if isinstance(evalue, (EnvironmentError, select.error)):
2594
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
