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)
26
from bzrlib.lazy_import import lazy_import
27
lazy_import(globals(), """
27
from .lazy_import import lazy_import
28
lazy_import(globals(), """
29
29
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,
35
# We need to import both shutil and rmtree as we export the later on posix
36
# and need the former on windows
38
from shutil import rmtree
41
# We need to import both tempfile and mkdtemp as we export the later on posix
42
# and need the former on windows
44
from tempfile import mkdtemp
44
from tempfile import (
52
from breezy.i18n import gettext
73
# Cross platform wall-clock time functionality with decent resolution.
74
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
75
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
76
# synchronized with ``time.time()``, this is only meant to be used to find
77
# delta times by subtracting from another call to this function.
78
timer_func = time.time
79
if sys.platform == 'win32':
80
timer_func = time.clock
56
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
58
if sys.version_info < (2, 5):
59
import md5 as _mod_md5
61
import sha as _mod_sha
71
from bzrlib import symbol_versioning
82
74
# On win32, O_BINARY is used to indicate the file should
83
75
# be opened in binary mode, rather than text mode.
84
76
# On other platforms, O_BINARY doesn't exist, because
85
77
# they always open in binary mode, so it is okay to
86
# OR with 0 on those platforms.
87
# O_NOINHERIT and O_TEXT exists only on win32 too.
78
# OR with 0 on those platforms
88
79
O_BINARY = getattr(os, 'O_BINARY', 0)
89
O_TEXT = getattr(os, 'O_TEXT', 0)
90
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
93
class UnsupportedTimezoneFormat(errors.BzrError):
95
_fmt = ('Unsupported timezone format "%(timezone)s", '
96
'options are "utc", "original", "local".')
98
def __init__(self, timezone):
99
self.timezone = timezone
102
82
def get_unicode_argv():
106
84
user_encoding = get_user_encoding()
107
85
return [a.decode(user_encoding) for a in sys.argv[1:]]
108
86
except UnicodeDecodeError:
109
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
110
"application locale.").format(a, user_encoding))
87
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
113
91
def make_readonly(filename):
114
92
"""Make a filename read-only."""
115
93
mod = os.lstat(filename).st_mode
116
94
if not stat.S_ISLNK(mod):
118
chmod_if_possible(filename, mod)
96
os.chmod(filename, mod)
121
99
def make_writable(filename):
122
100
mod = os.lstat(filename).st_mode
123
101
if not stat.S_ISLNK(mod):
125
chmod_if_possible(filename, mod)
128
def chmod_if_possible(filename, mode):
129
# Set file mode if that can be safely done.
130
# Sometimes even on unix the filesystem won't allow it - see
131
# https://bugs.launchpad.net/bzr/+bug/606537
133
# It is probably faster to just do the chmod, rather than
134
# doing a stat, and then trying to compare
135
os.chmod(filename, mode)
136
except (IOError, OSError) as e:
137
# Permission/access denied seems to commonly happen on smbfs; there's
138
# probably no point warning about it.
139
# <https://bugs.launchpad.net/bzr/+bug/606537>
140
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
141
trace.mutter("ignore error on chmod of %r: %r" % (
103
os.chmod(filename, mod)
147
106
def minimum_path_selection(paths):
302
251
# choke on a Unicode string containing a relative path if
303
252
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
254
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
305
255
def _posix_abspath(path):
306
256
# jam 20060426 rather than encoding to fsencoding
307
257
# copy posixpath.abspath, but use os.getcwdu instead
308
258
if not posixpath.isabs(path):
309
259
path = posixpath.join(getcwd(), path)
310
return _posix_normpath(path)
260
return posixpath.normpath(path)
313
263
def _posix_realpath(path):
314
264
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
317
def _posix_normpath(path):
318
path = posixpath.normpath(path)
319
# Bug 861008: posixpath.normpath() returns a path normalized according to
320
# the POSIX standard, which stipulates (for compatibility reasons) that two
321
# leading slashes must not be simplified to one, and only if there are 3 or
322
# more should they be simplified as one. So we treat the leading 2 slashes
323
# as a special case here by simply removing the first slash, as we consider
324
# that breaking POSIX compatibility for this obscure feature is acceptable.
325
# This is not a paranoid precaution, as we notably get paths like this when
326
# the repo is hosted at the root of the filesystem, i.e. in "/".
327
if path.startswith('//'):
332
def _posix_path_from_environ(key):
333
"""Get unicode path from `key` in environment or None if not present
335
Note that posix systems use arbitrary byte strings for filesystem objects,
336
so a path that raises BadFilenameEncoding here may still be accessible.
338
val = os.environ.get(key, None)
339
if PY3 or val is None:
342
return val.decode(_fs_enc)
343
except UnicodeDecodeError:
344
# GZ 2011-12-12:Ideally want to include `key` in the exception message
345
raise errors.BadFilenameEncoding(val, _fs_enc)
348
def _posix_get_home_dir():
349
"""Get the home directory of the current user as a unicode path"""
350
path = posixpath.expanduser("~")
352
return path.decode(_fs_enc)
353
except AttributeError:
355
except UnicodeDecodeError:
356
raise errors.BadFilenameEncoding(path, _fs_enc)
359
def _posix_getuser_unicode():
360
"""Get username from environment or password database as unicode"""
361
name = getpass.getuser()
364
user_encoding = get_user_encoding()
366
return name.decode(user_encoding)
367
except UnicodeDecodeError:
368
raise errors.BzrError("Encoding of username %r is unsupported by %s "
369
"application locale." % (name, user_encoding))
372
267
def _win32_fixdrive(path):
373
268
"""Force drive letters to be consistent.
378
273
running python.exe under cmd.exe return capital C:\\
379
274
running win32 python inside a cygwin shell returns lowercase c:\\
381
drive, path = ntpath.splitdrive(path)
276
drive, path = _nt_splitdrive(path)
382
277
return drive.upper() + path
385
280
def _win32_abspath(path):
386
# Real ntpath.abspath doesn't have a problem with a unicode cwd
387
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
281
# Real _nt_abspath doesn't have a problem with a unicode cwd
282
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
285
def _win98_abspath(path):
286
"""Return the absolute version of a path.
287
Windows 98 safe implementation (python reimplementation
288
of Win32 API function GetFullPathNameW)
293
# \\HOST\path => //HOST/path
294
# //HOST/path => //HOST/path
295
# path => C:/cwd/path
298
# check for absolute path
299
drive = _nt_splitdrive(path)[0]
300
if drive == '' and path[:2] not in('//','\\\\'):
302
# we cannot simply os.path.join cwd and path
303
# because os.path.join('C:','/path') produce '/path'
304
# and this is incorrect
305
if path[:1] in ('/','\\'):
306
cwd = _nt_splitdrive(cwd)[0]
308
path = cwd + '\\' + path
309
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
390
312
def _win32_realpath(path):
391
# Real ntpath.realpath doesn't have a problem with a unicode cwd
392
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
313
# Real _nt_realpath doesn't have a problem with a unicode cwd
314
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
395
317
def _win32_pathjoin(*args):
396
return ntpath.join(*args).replace('\\', '/')
318
return _nt_join(*args).replace('\\', '/')
399
321
def _win32_normpath(path):
400
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
322
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
403
325
def _win32_getcwd():
404
return _win32_fixdrive(_getcwd().replace('\\', '/'))
326
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
407
329
def _win32_mkdtemp(*args, **kwargs):
429
351
def _mac_getcwd():
430
return unicodedata.normalize('NFC', _getcwd())
433
def _rename_wrap_exception(rename_func):
434
"""Adds extra information to any exceptions that come from rename().
436
The exception has an updated message and 'old_filename' and 'new_filename'
440
def _rename_wrapper(old, new):
442
rename_func(old, new)
444
detailed_error = OSError(e.errno, e.strerror +
445
" [occurred when renaming '%s' to '%s']" %
447
detailed_error.old_filename = old
448
detailed_error.new_filename = new
451
return _rename_wrapper
454
if sys.version_info > (3,):
460
# Default rename wraps os.rename()
461
rename = _rename_wrap_exception(os.rename)
352
return unicodedata.normalize('NFC', os.getcwdu())
463
355
# Default is to just use the python builtins, but these can be rebound on
464
356
# particular platforms.
465
357
abspath = _posix_abspath
466
358
realpath = _posix_realpath
467
359
pathjoin = os.path.join
468
normpath = _posix_normpath
469
path_from_environ = _posix_path_from_environ
470
_get_home_dir = _posix_get_home_dir
471
getuser_unicode = _posix_getuser_unicode
360
normpath = os.path.normpath
473
363
dirname = os.path.dirname
474
364
basename = os.path.basename
475
365
split = os.path.split
476
366
splitext = os.path.splitext
477
# These were already lazily imported into local scope
367
# These were already imported into local scope
478
368
# mkdtemp = tempfile.mkdtemp
479
369
# rmtree = shutil.rmtree
487
371
MIN_ABS_PATHLENGTH = 1
490
374
if sys.platform == 'win32':
491
abspath = _win32_abspath
375
if win32utils.winver == 'Windows 98':
376
abspath = _win98_abspath
378
abspath = _win32_abspath
492
379
realpath = _win32_realpath
493
380
pathjoin = _win32_pathjoin
494
381
normpath = _win32_normpath
495
382
getcwd = _win32_getcwd
496
383
mkdtemp = _win32_mkdtemp
497
rename = _rename_wrap_exception(_win32_rename)
499
from . import _walkdirs_win32
503
lstat = _walkdirs_win32.lstat
504
fstat = _walkdirs_win32.fstat
505
wrap_stat = _walkdirs_win32.wrap_stat
384
rename = _win32_rename
507
386
MIN_ABS_PATHLENGTH = 3
547
423
On my standard US Windows XP, the preferred encoding is
548
424
cp1252, but the console is cp437
550
:param trace: If True trace the selected encoding via mutter().
552
from .trace import mutter
426
from bzrlib.trace import mutter
553
427
output_encoding = getattr(sys.stdout, 'encoding', None)
554
428
if not output_encoding:
555
429
input_encoding = getattr(sys.stdin, 'encoding', None)
556
430
if not input_encoding:
557
431
output_encoding = get_user_encoding()
559
mutter('encoding stdout as osutils.get_user_encoding() %r',
432
mutter('encoding stdout as osutils.get_user_encoding() %r',
562
435
output_encoding = input_encoding
564
mutter('encoding stdout as sys.stdin encoding %r',
436
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
568
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
438
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
569
439
if output_encoding == 'cp0':
570
440
# invalid encoding (cp0 means 'no codepage' on Windows)
571
441
output_encoding = get_user_encoding()
573
mutter('cp0 is invalid encoding.'
442
mutter('cp0 is invalid encoding.'
574
443
' encoding stdout as osutils.get_user_encoding() %r',
578
447
codecs.lookup(output_encoding)
579
448
except LookupError:
580
sys.stderr.write('brz: warning:'
449
sys.stderr.write('bzr: warning:'
581
450
' unknown terminal encoding %s.\n'
582
451
' Using encoding %s instead.\n'
583
452
% (output_encoding, get_user_encoding())
1394
1204
return unicode_or_utf8_string.encode('utf-8')
1397
def safe_revision_id(unicode_or_utf8_string):
1207
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1208
' Revision id generators should be creating utf8'
1212
def safe_revision_id(unicode_or_utf8_string, warn=True):
1398
1213
"""Revision ids should now be utf8, but at one point they were unicode.
1400
1215
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1217
:param warn: Functions that are sanitizing user data can set warn=False
1402
1218
:return: None or a utf8 revision id.
1404
1220
if (unicode_or_utf8_string is None
1405
or unicode_or_utf8_string.__class__ == bytes):
1221
or unicode_or_utf8_string.__class__ == str):
1406
1222
return unicode_or_utf8_string
1407
raise TypeError('Unicode revision ids are no longer supported. '
1408
'Revision id generators should be creating utf8 revision '
1412
def safe_file_id(unicode_or_utf8_string):
1224
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1226
return cache_utf8.encode(unicode_or_utf8_string)
1229
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1230
' generators should be creating utf8 file ids.')
1233
def safe_file_id(unicode_or_utf8_string, warn=True):
1413
1234
"""File ids should now be utf8, but at one point they were unicode.
1415
1236
This is the same as safe_utf8, except it uses the cached encode functions
1474
1294
normalized_filename = _inaccessible_normalized_filename
1477
def set_signal_handler(signum, handler, restart_syscall=True):
1478
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1479
on platforms that support that.
1481
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1482
automatically restart (by calling `signal.siginterrupt(signum,
1483
False)`). May be ignored if the feature is not available on this
1484
platform or Python version.
1488
siginterrupt = signal.siginterrupt
1490
# This python implementation doesn't provide signal support, hence no
1493
except AttributeError:
1494
# siginterrupt doesn't exist on this platform, or for this version
1496
siginterrupt = lambda signum, flag: None
1498
def sig_handler(*args):
1499
# Python resets the siginterrupt flag when a signal is
1500
# received. <http://bugs.python.org/issue8354>
1501
# As a workaround for some cases, set it back the way we want it.
1502
siginterrupt(signum, False)
1503
# Now run the handler function passed to set_signal_handler.
1506
sig_handler = handler
1507
old_handler = signal.signal(signum, sig_handler)
1509
siginterrupt(signum, False)
1513
default_terminal_width = 80
1514
"""The default terminal width for ttys.
1516
This is defined so that higher levels can share a common fallback value when
1517
terminal_width() returns None.
1520
# Keep some state so that terminal_width can detect if _terminal_size has
1521
# returned a different size since the process started. See docstring and
1522
# comments of terminal_width for details.
1523
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1524
_terminal_size_state = 'no_data'
1525
_first_terminal_size = None
1527
1297
def terminal_width():
1528
"""Return terminal width.
1530
None is returned if the width can't established precisely.
1533
- if BRZ_COLUMNS is set, returns its value
1534
- if there is no controlling terminal, returns None
1535
- query the OS, if the queried size has changed since the last query,
1537
- if COLUMNS is set, returns its value,
1538
- if the OS has a value (even though it's never changed), return its value.
1540
From there, we need to query the OS to get the size of the controlling
1543
On Unices we query the OS by:
1544
- get termios.TIOCGWINSZ
1545
- if an error occurs or a negative value is obtained, returns None
1547
On Windows we query the OS by:
1548
- win32utils.get_console_size() decides,
1549
- returns None on error (provided default value)
1551
# Note to implementors: if changing the rules for determining the width,
1552
# make sure you've considered the behaviour in these cases:
1553
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1554
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1556
# - (add more interesting cases here, if you find any)
1557
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1558
# but we don't want to register a signal handler because it is impossible
1559
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1560
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1561
# time so we can notice if the reported size has changed, which should have
1564
# If BRZ_COLUMNS is set, take it, user is always right
1565
# Except if they specified 0 in which case, impose no limit here
1567
width = int(os.environ['BRZ_COLUMNS'])
1568
except (KeyError, ValueError):
1570
if width is not None:
1576
isatty = getattr(sys.stdout, 'isatty', None)
1577
if isatty is None or not isatty():
1578
# Don't guess, setting BRZ_COLUMNS is the recommended way to override.
1582
width, height = os_size = _terminal_size(None, None)
1583
global _first_terminal_size, _terminal_size_state
1584
if _terminal_size_state == 'no_data':
1585
_first_terminal_size = os_size
1586
_terminal_size_state = 'unchanged'
1587
elif (_terminal_size_state == 'unchanged' and
1588
_first_terminal_size != os_size):
1589
_terminal_size_state = 'changed'
1591
# If the OS claims to know how wide the terminal is, and this value has
1592
# ever changed, use that.
1593
if _terminal_size_state == 'changed':
1594
if width is not None and width > 0:
1597
# If COLUMNS is set, use it.
1599
return int(os.environ['COLUMNS'])
1600
except (KeyError, ValueError):
1603
# Finally, use an unchanged size from the OS, if we have one.
1604
if _terminal_size_state == 'unchanged':
1605
if width is not None and width > 0:
1608
# The width could not be determined.
1612
def _win32_terminal_size(width, height):
1613
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1614
return width, height
1617
def _ioctl_terminal_size(width, height):
1298
"""Return estimated terminal width."""
1299
if sys.platform == 'win32':
1300
return win32utils.get_console_size()[0]
1619
1303
import struct, fcntl, termios
1620
1304
s = struct.pack('HHHH', 0, 0, 0, 0)
1621
1305
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1622
height, width = struct.unpack('HHHH', x)[0:2]
1623
except (IOError, AttributeError):
1306
width = struct.unpack('HHHH', x)[1]
1625
return width, height
1627
_terminal_size = None
1628
"""Returns the terminal size as (width, height).
1630
:param width: Default value for width.
1631
:param height: Default value for height.
1633
This is defined specifically for each OS and query the size of the controlling
1634
terminal. If any error occurs, the provided default values should be returned.
1636
if sys.platform == 'win32':
1637
_terminal_size = _win32_terminal_size
1639
_terminal_size = _ioctl_terminal_size
1311
width = int(os.environ['COLUMNS'])
1642
1320
def supports_executable():
1998
1658
_cached_user_encoding = None
2001
def get_user_encoding():
1661
def get_user_encoding(use_cache=True):
2002
1662
"""Find out what the preferred user encoding is.
2004
1664
This is generally the encoding that is used for command line parameters
2005
1665
and file contents. This may be different from the terminal encoding
2006
1666
or the filesystem encoding.
1668
:param use_cache: Enable cache for detected encoding.
1669
(This parameter is turned on by default,
1670
and required only for selftesting)
2008
1672
:return: A string defining the preferred user encoding
2010
1674
global _cached_user_encoding
2011
if _cached_user_encoding is not None:
1675
if _cached_user_encoding is not None and use_cache:
2012
1676
return _cached_user_encoding
2014
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2015
# Use the existing locale settings and call nl_langinfo directly
2016
# rather than going through getpreferredencoding. This avoids
2017
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2018
# possibility of the setlocale call throwing an error.
2019
user_encoding = locale.nl_langinfo(locale.CODESET)
1678
if sys.platform == 'darwin':
1679
# python locale.getpreferredencoding() always return
1680
# 'mac-roman' on darwin. That's a lie.
1681
sys.platform = 'posix'
1683
if os.environ.get('LANG', None) is None:
1684
# If LANG is not set, we end up with 'ascii', which is bad
1685
# ('mac-roman' is more than ascii), so we set a default which
1686
# will give us UTF-8 (which appears to work in all cases on
1687
# OSX). Users are still free to override LANG of course, as
1688
# long as it give us something meaningful. This work-around
1689
# *may* not be needed with python 3k and/or OSX 10.5, but will
1690
# work with them too -- vila 20080908
1691
os.environ['LANG'] = 'en_US.UTF-8'
1694
sys.platform = 'darwin'
2021
# GZ 2011-12-19: On windows could call GetACP directly instead.
2022
user_encoding = locale.getpreferredencoding(False)
2025
user_encoding = codecs.lookup(user_encoding).name
2027
if user_encoding not in ("", "cp0"):
2028
sys.stderr.write('brz: warning:'
1699
user_encoding = locale.getpreferredencoding()
1700
except locale.Error, e:
1701
sys.stderr.write('bzr: warning: %s\n'
1702
' Could not determine what text encoding to use.\n'
1703
' This error usually means your Python interpreter\n'
1704
' doesn\'t support the locale set by $LANG (%s)\n'
1705
" Continuing with ascii encoding.\n"
1706
% (e, os.environ.get('LANG')))
1707
user_encoding = 'ascii'
1709
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1710
# treat that as ASCII, and not support printing unicode characters to the
1713
# For python scripts run under vim, we get '', so also treat that as ASCII
1714
if user_encoding in (None, 'cp0', ''):
1715
user_encoding = 'ascii'
1719
codecs.lookup(user_encoding)
1721
sys.stderr.write('bzr: warning:'
2029
1722
' unknown encoding %s.'
2030
1723
' Continuing with ascii encoding.\n'
2031
1724
% user_encoding
2033
user_encoding = 'ascii'
2035
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2036
if user_encoding == 'ascii':
2037
if sys.platform == 'darwin':
2038
# OSX is special-cased in Python to have a UTF-8 filesystem
2039
# encoding and previously had LANG set here if not present.
2040
user_encoding = 'utf-8'
2041
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2042
# for some other posix platforms as well.
2044
_cached_user_encoding = user_encoding
1726
user_encoding = 'ascii'
1729
_cached_user_encoding = user_encoding
2045
1731
return user_encoding
2048
def get_diff_header_encoding():
2049
return get_terminal_encoding()
2052
1734
def get_host_name():
2053
1735
"""Return the current unicode host name.
2056
1738
behaves inconsistently on different platforms.
2058
1740
if sys.platform == "win32":
2059
1742
return win32utils.get_host_name()
2063
return socket.gethostname()
2064
1745
return socket.gethostname().decode(get_user_encoding())
2067
# We must not read/write any more than 64k at a time from/to a socket so we
2068
# don't risk "no buffer space available" errors on some platforms. Windows in
2069
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2071
MAX_SOCKET_CHUNK = 64 * 1024
2073
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2074
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2075
_eno = getattr(errno, _eno, None)
2076
if _eno is not None:
2077
_end_of_stream_errors.append(_eno)
2081
def read_bytes_from_socket(sock, report_activity=None,
2082
max_read_size=MAX_SOCKET_CHUNK):
2083
"""Read up to max_read_size of bytes from sock and notify of progress.
2085
Translates "Connection reset by peer" into file-like EOF (return an
2086
empty string rather than raise an error), and repeats the recv if
2087
interrupted by a signal.
2091
data = sock.recv(max_read_size)
2092
except socket.error as e:
2094
if eno in _end_of_stream_errors:
2095
# The connection was closed by the other side. Callers expect
2096
# an empty string to signal end-of-stream.
2098
elif eno == errno.EINTR:
2099
# Retry the interrupted recv.
2103
if report_activity is not None:
2104
report_activity(len(data), 'read')
2108
def recv_all(socket, count):
1748
def recv_all(socket, bytes):
2109
1749
"""Receive an exact number of bytes.
2111
1751
Regular Socket.recv() may return less than the requested number of bytes,
2112
depending on what's in the OS buffer. MSG_WAITALL is not available
1752
dependning on what's in the OS buffer. MSG_WAITALL is not available
2113
1753
on all platforms, but this should work everywhere. This will return
2114
1754
less than the requested amount if the remote end closes.
2116
1756
This isn't optimized and is intended mostly for use in testing.
2119
while len(b) < count:
2120
new = read_bytes_from_socket(socket, None, count - len(b))
1759
while len(b) < bytes:
1760
new = until_no_eintr(socket.recv, bytes - len(b))
2127
def send_all(sock, bytes, report_activity=None):
1767
def send_all(socket, bytes, report_activity=None):
2128
1768
"""Send all bytes on a socket.
2130
Breaks large blocks in smaller chunks to avoid buffering limitations on
2131
some platforms, and catches EINTR which may be thrown if the send is
2132
interrupted by a signal.
2134
This is preferred to socket.sendall(), because it avoids portability bugs
2135
and provides activity reporting.
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.
2137
1773
:param report_activity: Call this as bytes are read, see
2138
1774
Transport._report_activity
2141
byte_count = len(bytes)
2142
view = memoryview(bytes)
2143
while sent_total < byte_count:
2145
sent = sock.send(view[sent_total:sent_total+MAX_SOCKET_CHUNK])
2146
except (socket.error, IOError) as e:
2147
if e.args[0] in _end_of_stream_errors:
2148
raise errors.ConnectionReset(
2149
"Error trying to write to socket", e)
2150
if e.args[0] != errno.EINTR:
2154
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2157
if report_activity is not None:
2158
report_activity(sent, 'write')
2161
def connect_socket(address):
2162
# Slight variation of the socket.create_connection() function (provided by
2163
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2164
# provide it for previous python versions. Also, we don't use the timeout
2165
# parameter (provided by the python implementation) so we don't implement
2167
err = socket.error('getaddrinfo returns an empty list')
2168
host, port = address
2169
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2170
af, socktype, proto, canonname, sa = res
2173
sock = socket.socket(af, socktype, proto)
2177
except socket.error as e:
2179
# 'err' is now the most recent error
2180
if sock is not None:
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)
2185
1784
def dereference_path(path):
2213
1812
If and when pkg_resources becomes a standard library, this routine
2214
1813
can delegate to it.
2216
# Check package name is within breezy
2217
if package == "breezy":
1815
# Check package name is within bzrlib
1816
if package == "bzrlib":
2218
1817
resource_relpath = resource_name
2219
elif package.startswith("breezy."):
2220
package = package[len("breezy."):].replace('.', os.sep)
1818
elif package.startswith("bzrlib."):
1819
package = package[len("bzrlib."):].replace('.', os.sep)
2221
1820
resource_relpath = pathjoin(package, resource_name)
2223
raise errors.BzrError('resource package %s not in breezy' % package)
1822
raise errors.BzrError('resource package %s not in bzrlib' % package)
2225
1824
# Map the resource to a file and read its contents
2226
base = dirname(breezy.__file__)
1825
base = dirname(bzrlib.__file__)
2227
1826
if getattr(sys, 'frozen', None): # bzr.exe
2228
1827
base = abspath(pathjoin(base, '..', '..'))
2229
with open(pathjoin(base, resource_relpath), "rU") as f:
1828
filename = pathjoin(base, resource_relpath)
1829
return open(filename, 'rU').read()
2232
1832
def file_kind_from_stat_mode_thunk(mode):
2233
1833
global file_kind_from_stat_mode
2234
1834
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2236
from ._readdir_pyx import UTF8DirReader
1836
from bzrlib._readdir_pyx import UTF8DirReader
2237
1837
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2238
except ImportError as e:
1838
except ImportError, e:
2239
1839
# This is one time where we won't warn that an extension failed to
2240
1840
# load. The extension is never available on Windows anyway.
2241
from ._readdir_py import (
1841
from bzrlib._readdir_py import (
2242
1842
_kind_from_mode as file_kind_from_stat_mode
2244
1844
return file_kind_from_stat_mode(mode)
2245
1845
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2247
def file_stat(f, _lstat=os.lstat):
1848
def file_kind(f, _lstat=os.lstat):
2251
except OSError as e:
1850
return file_kind_from_stat_mode(_lstat(f).st_mode)
2252
1852
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2253
1853
raise errors.NoSuchFile(f)
2256
def file_kind(f, _lstat=os.lstat):
2257
stat_value = file_stat(f, _lstat)
2258
return file_kind_from_stat_mode(stat_value.st_mode)
2260
1857
def until_no_eintr(f, *a, **kw):
2261
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2263
WARNING: you must be certain that it is safe to retry the call repeatedly
2264
if EINTR does occur. This is typically only true for low-level operations
2265
like os.read. If in any doubt, don't use this.
2267
Keep in mind that this is not a complete solution to EINTR. There is
2268
probably code in the Python standard library and other dependencies that
2269
may encounter EINTR if a signal arrives (and there is signal handler for
2270
that signal). So this function can reduce the impact for IO that breezy
2271
directly controls, but it is not a complete solution.
1858
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2273
1859
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2276
1862
return f(*a, **kw)
2277
except (IOError, OSError) as e:
1863
except (IOError, OSError), e:
2278
1864
if e.errno == errno.EINTR:
1868
def re_compile_checked(re_string, flags=0, where=""):
1869
"""Return a compiled re, or raise a sensible error.
1871
This should only be used when compiling user-supplied REs.
1873
:param re_string: Text form of regular expression.
1874
:param flags: eg re.IGNORECASE
1875
:param where: Message explaining to the user the context where
1876
it occurred, eg 'log search filter'.
1878
# from https://bugs.launchpad.net/bzr/+bug/251352
1880
re_obj = re.compile(re_string, flags)
1885
where = ' in ' + where
1886
# despite the name 'error' is a type
1887
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
1888
% (where, re_string, e))
2283
1891
if sys.platform == "win32":
2286
1894
return msvcrt.getch()
2291
1899
fd = sys.stdin.fileno()
2292
1900
settings = termios.tcgetattr(fd)
2357
1960
_cached_concurrency = concurrency
2358
1961
return concurrency
2361
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2362
"""A stream writer that doesn't decode str arguments."""
2364
def __init__(self, encode, stream, errors='strict'):
2365
codecs.StreamWriter.__init__(self, stream, errors)
2366
self.encode = encode
2368
def write(self, object):
2369
if isinstance(object, str):
2370
self.stream.write(object)
2372
data, _ = self.encode(object, self.errors)
2373
self.stream.write(data)
2375
if sys.platform == 'win32':
2376
def open_file(filename, mode='r', bufsize=-1):
2377
"""This function is used to override the ``open`` builtin.
2379
But it uses O_NOINHERIT flag so the file handle is not inherited by
2380
child processes. Deleting or renaming a closed file opened with this
2381
function is not blocking child processes.
2383
writing = 'w' in mode
2384
appending = 'a' in mode
2385
updating = '+' in mode
2386
binary = 'b' in mode
2389
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2390
# for flags for each modes.
2400
flags |= os.O_WRONLY
2401
flags |= os.O_CREAT | os.O_TRUNC
2406
flags |= os.O_WRONLY
2407
flags |= os.O_CREAT | os.O_APPEND
2412
flags |= os.O_RDONLY
2414
return os.fdopen(os.open(filename, flags), mode, bufsize)
2419
def available_backup_name(base, exists):
2420
"""Find a non-existing backup file name.
2422
This will *not* create anything, this only return a 'free' entry. This
2423
should be used for checking names in a directory below a locked
2424
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2425
Leap) and generally discouraged.
2427
:param base: The base name.
2429
:param exists: A callable returning True if the path parameter exists.
2432
name = "%s.~%d~" % (base, counter)
2435
name = "%s.~%d~" % (base, counter)
2439
def set_fd_cloexec(fd):
2440
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2441
support for this is not available.
2445
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2446
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2447
except (ImportError, AttributeError):
2448
# Either the fcntl module or specific constants are not present
2452
def find_executable_on_path(name):
2453
"""Finds an executable on the PATH.
2455
On Windows, this will try to append each extension in the PATHEXT
2456
environment variable to the name, if it cannot be found with the name
2459
:param name: The base name of the executable.
2460
:return: The path to the executable found or None.
2462
if sys.platform == 'win32':
2463
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2464
exts = [ext.lower() for ext in exts]
2465
base, ext = os.path.splitext(name)
2467
if ext.lower() not in exts:
2473
path = os.environ.get('PATH')
2474
if path is not None:
2475
path = path.split(os.pathsep)
2478
f = os.path.join(d, name) + ext
2479
if os.access(f, os.X_OK):
2481
if sys.platform == 'win32':
2482
app_path = win32utils.get_app_path(name)
2483
if app_path != name:
2488
def _posix_is_local_pid_dead(pid):
2489
"""True if pid doesn't correspond to live process on this machine"""
2491
# Special meaning of unix kill: just check if it's there.
2493
except OSError as e:
2494
if e.errno == errno.ESRCH:
2495
# On this machine, and really not found: as sure as we can be
2498
elif e.errno == errno.EPERM:
2499
# exists, though not ours
2502
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2503
# Don't really know.
2506
# Exists and our process: not dead.
2509
if sys.platform == "win32":
2510
is_local_pid_dead = win32utils.is_local_pid_dead
2512
is_local_pid_dead = _posix_is_local_pid_dead
2514
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2515
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2516
if getattr(errno, name, None) is not None]
2519
def fdatasync(fileno):
2520
"""Flush file contents to disk if possible.
2522
:param fileno: Integer OS file handle.
2523
:raises TransportNotPossible: If flushing to disk is not possible.
2525
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2529
except IOError as e:
2530
# See bug #1075108, on some platforms fdatasync exists, but can
2531
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2532
# and reduce the chance of corruption-on-powerloss situations. It
2533
# is not a mandatory call, so it is ok to suppress failures.
2534
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2535
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2539
def ensure_empty_directory_exists(path, exception_class):
2540
"""Make sure a local directory exists and is empty.
2542
If it does not exist, it is created. If it exists and is not empty, an
2543
instance of exception_class is raised.
2547
except OSError as e:
2548
if e.errno != errno.EEXIST:
2550
if os.listdir(path) != []:
2551
raise exception_class(path)
2554
def is_environment_error(evalue):
2555
"""True if exception instance is due to a process environment issue
2557
This includes OSError and IOError, but also other errors that come from
2558
the operating system or core libraries but are not subclasses of those.
2560
if isinstance(evalue, (EnvironmentError, select.error)):
2562
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):