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
from bzrlib.lazy_import import lazy_import
26
lazy_import(globals(), """
27
from .lazy_import import lazy_import
28
lazy_import(globals(), """
29
28
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,
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
43
from tempfile import (
52
from breezy.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
70
from bzrlib import symbol_versioning
73
73
# On win32, O_BINARY is used to indicate the file should
74
74
# be opened in binary mode, rather than text mode.
75
75
# On other platforms, O_BINARY doesn't exist, because
76
76
# they always open in binary mode, so it is okay to
77
# OR with 0 on those platforms.
78
# O_NOINHERIT and O_TEXT exists only on win32 too.
77
# OR with 0 on those platforms
79
78
O_BINARY = getattr(os, 'O_BINARY', 0)
80
O_TEXT = getattr(os, 'O_TEXT', 0)
81
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
84
class UnsupportedTimezoneFormat(errors.BzrError):
86
_fmt = ('Unsupported timezone format "%(timezone)s", '
87
'options are "utc", "original", "local".')
89
def __init__(self, timezone):
90
self.timezone = timezone
93
81
def get_unicode_argv():
97
83
user_encoding = get_user_encoding()
98
84
return [a.decode(user_encoding) for a in sys.argv[1:]]
99
85
except UnicodeDecodeError:
100
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
101
"application locale.").format(a, user_encoding))
86
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
104
90
def make_readonly(filename):
105
91
"""Make a filename read-only."""
106
92
mod = os.lstat(filename).st_mode
107
93
if not stat.S_ISLNK(mod):
109
chmod_if_possible(filename, mod)
95
os.chmod(filename, mod)
112
98
def make_writable(filename):
113
99
mod = os.lstat(filename).st_mode
114
100
if not stat.S_ISLNK(mod):
116
chmod_if_possible(filename, mod)
119
def chmod_if_possible(filename, mode):
120
# Set file mode if that can be safely done.
121
# Sometimes even on unix the filesystem won't allow it - see
122
# https://bugs.launchpad.net/bzr/+bug/606537
124
# It is probably faster to just do the chmod, rather than
125
# doing a stat, and then trying to compare
126
os.chmod(filename, mode)
127
except (IOError, OSError) as e:
128
# Permission/access denied seems to commonly happen on smbfs; there's
129
# probably no point warning about it.
130
# <https://bugs.launchpad.net/bzr/+bug/606537>
131
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
132
trace.mutter("ignore error on chmod of %r: %r" % (
102
os.chmod(filename, mod)
138
105
def minimum_path_selection(paths):
252
208
file_existed = False
254
210
rename_func(new, tmp_name)
255
except (errors.NoSuchFile,):
211
except (errors.NoSuchFile,), e:
258
214
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
259
215
# function raises an IOError with errno is None when a rename fails.
260
216
# This then gets caught here.
261
217
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
263
except Exception as e:
264
220
if (getattr(e, 'errno', None) is None
265
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
221
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
268
224
file_existed = True
272
# This may throw an exception, in which case success will
274
rename_func(old, new)
276
except (IOError, OSError) as e:
277
# source and target may be aliases of each other (e.g. on a
278
# case-insensitive filesystem), so we may have accidentally renamed
279
# source by when we tried to rename target
280
if (file_existed and e.errno in (None, errno.ENOENT)
281
and old.lower() == new.lower()):
282
# source and target are the same file on a case-insensitive
283
# filesystem, so we don't generate an exception
229
# This may throw an exception, in which case success will
231
rename_func(old, new)
233
except (IOError, OSError), e:
234
# source and target may be aliases of each other (e.g. on a
235
# case-insensitive filesystem), so we may have accidentally renamed
236
# source by when we tried to rename target
237
if not (file_existed and e.errno in (None, errno.ENOENT)):
289
241
# If the file used to exist, rename it back into place
298
250
# choke on a Unicode string containing a relative path if
299
251
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
253
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
301
254
def _posix_abspath(path):
302
255
# jam 20060426 rather than encoding to fsencoding
303
256
# copy posixpath.abspath, but use os.getcwdu instead
304
257
if not posixpath.isabs(path):
305
258
path = posixpath.join(getcwd(), path)
306
return _posix_normpath(path)
259
return posixpath.normpath(path)
309
262
def _posix_realpath(path):
310
263
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
313
def _posix_normpath(path):
314
path = posixpath.normpath(path)
315
# Bug 861008: posixpath.normpath() returns a path normalized according to
316
# the POSIX standard, which stipulates (for compatibility reasons) that two
317
# leading slashes must not be simplified to one, and only if there are 3 or
318
# more should they be simplified as one. So we treat the leading 2 slashes
319
# as a special case here by simply removing the first slash, as we consider
320
# that breaking POSIX compatibility for this obscure feature is acceptable.
321
# This is not a paranoid precaution, as we notably get paths like this when
322
# the repo is hosted at the root of the filesystem, i.e. in "/".
323
if path.startswith('//'):
328
def _posix_path_from_environ(key):
329
"""Get unicode path from `key` in environment or None if not present
331
Note that posix systems use arbitrary byte strings for filesystem objects,
332
so a path that raises BadFilenameEncoding here may still be accessible.
334
val = os.environ.get(key, None)
335
if PY3 or val is None:
338
return val.decode(_fs_enc)
339
except UnicodeDecodeError:
340
# GZ 2011-12-12:Ideally want to include `key` in the exception message
341
raise errors.BadFilenameEncoding(val, _fs_enc)
344
def _posix_get_home_dir():
345
"""Get the home directory of the current user as a unicode path"""
346
path = posixpath.expanduser("~")
348
return path.decode(_fs_enc)
349
except AttributeError:
351
except UnicodeDecodeError:
352
raise errors.BadFilenameEncoding(path, _fs_enc)
355
def _posix_getuser_unicode():
356
"""Get username from environment or password database as unicode"""
357
name = getpass.getuser()
360
user_encoding = get_user_encoding()
362
return name.decode(user_encoding)
363
except UnicodeDecodeError:
364
raise errors.BzrError("Encoding of username %r is unsupported by %s "
365
"application locale." % (name, user_encoding))
368
266
def _win32_fixdrive(path):
369
267
"""Force drive letters to be consistent.
374
272
running python.exe under cmd.exe return capital C:\\
375
273
running win32 python inside a cygwin shell returns lowercase c:\\
377
drive, path = ntpath.splitdrive(path)
275
drive, path = _nt_splitdrive(path)
378
276
return drive.upper() + path
381
279
def _win32_abspath(path):
382
# Real ntpath.abspath doesn't have a problem with a unicode cwd
383
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
280
# Real _nt_abspath doesn't have a problem with a unicode cwd
281
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
284
def _win98_abspath(path):
285
"""Return the absolute version of a path.
286
Windows 98 safe implementation (python reimplementation
287
of Win32 API function GetFullPathNameW)
292
# \\HOST\path => //HOST/path
293
# //HOST/path => //HOST/path
294
# path => C:/cwd/path
297
# check for absolute path
298
drive = _nt_splitdrive(path)[0]
299
if drive == '' and path[:2] not in('//','\\\\'):
301
# we cannot simply os.path.join cwd and path
302
# because os.path.join('C:','/path') produce '/path'
303
# and this is incorrect
304
if path[:1] in ('/','\\'):
305
cwd = _nt_splitdrive(cwd)[0]
307
path = cwd + '\\' + path
308
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
386
311
def _win32_realpath(path):
387
# Real ntpath.realpath doesn't have a problem with a unicode cwd
388
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
312
# Real _nt_realpath doesn't have a problem with a unicode cwd
313
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
391
316
def _win32_pathjoin(*args):
392
return ntpath.join(*args).replace('\\', '/')
317
return _nt_join(*args).replace('\\', '/')
395
320
def _win32_normpath(path):
396
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
321
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
399
324
def _win32_getcwd():
400
return _win32_fixdrive(_getcwd().replace('\\', '/'))
325
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
403
328
def _win32_mkdtemp(*args, **kwargs):
425
350
def _mac_getcwd():
426
return unicodedata.normalize('NFC', _getcwd())
429
def _rename_wrap_exception(rename_func):
430
"""Adds extra information to any exceptions that come from rename().
432
The exception has an updated message and 'old_filename' and 'new_filename'
436
def _rename_wrapper(old, new):
438
rename_func(old, new)
440
detailed_error = OSError(e.errno, e.strerror +
441
" [occurred when renaming '%s' to '%s']" %
443
detailed_error.old_filename = old
444
detailed_error.new_filename = new
447
return _rename_wrapper
450
if sys.version_info > (3,):
456
# Default rename wraps os.rename()
457
rename = _rename_wrap_exception(os.rename)
351
return unicodedata.normalize('NFC', os.getcwdu())
459
354
# Default is to just use the python builtins, but these can be rebound on
460
355
# particular platforms.
461
356
abspath = _posix_abspath
462
357
realpath = _posix_realpath
463
358
pathjoin = os.path.join
464
normpath = _posix_normpath
465
path_from_environ = _posix_path_from_environ
466
_get_home_dir = _posix_get_home_dir
467
getuser_unicode = _posix_getuser_unicode
359
normpath = os.path.normpath
469
362
dirname = os.path.dirname
470
363
basename = os.path.basename
471
364
split = os.path.split
472
365
splitext = os.path.splitext
473
# These were already lazily imported into local scope
366
# These were already imported into local scope
474
367
# mkdtemp = tempfile.mkdtemp
475
368
# rmtree = shutil.rmtree
484
370
MIN_ABS_PATHLENGTH = 1
487
373
if sys.platform == 'win32':
488
abspath = _win32_abspath
374
if win32utils.winver == 'Windows 98':
375
abspath = _win98_abspath
377
abspath = _win32_abspath
489
378
realpath = _win32_realpath
490
379
pathjoin = _win32_pathjoin
491
380
normpath = _win32_normpath
492
381
getcwd = _win32_getcwd
493
382
mkdtemp = _win32_mkdtemp
494
rename = _rename_wrap_exception(_win32_rename)
496
from . import _walkdirs_win32
500
lstat = _walkdirs_win32.lstat
501
fstat = _walkdirs_win32.fstat
502
wrap_stat = _walkdirs_win32.wrap_stat
383
rename = _win32_rename
504
385
MIN_ABS_PATHLENGTH = 3
542
422
On my standard US Windows XP, the preferred encoding is
543
423
cp1252, but the console is cp437
545
:param trace: If True trace the selected encoding via mutter().
547
from .trace import mutter
425
from bzrlib.trace import mutter
548
426
output_encoding = getattr(sys.stdout, 'encoding', None)
549
427
if not output_encoding:
550
428
input_encoding = getattr(sys.stdin, 'encoding', None)
551
429
if not input_encoding:
552
430
output_encoding = get_user_encoding()
554
mutter('encoding stdout as osutils.get_user_encoding() %r',
431
mutter('encoding stdout as osutils.get_user_encoding() %r',
557
434
output_encoding = input_encoding
559
mutter('encoding stdout as sys.stdin encoding %r',
435
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
563
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
437
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
564
438
if output_encoding == 'cp0':
565
439
# invalid encoding (cp0 means 'no codepage' on Windows)
566
440
output_encoding = get_user_encoding()
568
mutter('cp0 is invalid encoding.'
569
' encoding stdout as osutils.get_user_encoding() %r',
441
mutter('cp0 is invalid encoding.'
442
' encoding stdout as osutils.get_user_encoding() %r',
573
446
codecs.lookup(output_encoding)
574
447
except LookupError:
575
sys.stderr.write('brz: warning:'
448
sys.stderr.write('bzr: warning:'
576
449
' unknown terminal encoding %s.\n'
577
450
' Using encoding %s instead.\n'
578
451
% (output_encoding, get_user_encoding())
580
453
output_encoding = get_user_encoding()
582
455
return output_encoding
849
701
:param show_offset: Whether to append the timezone.
851
703
(date_fmt, tt, offset_str) = \
852
_format_date(t, offset, timezone, date_fmt, show_offset)
704
_format_date(t, offset, timezone, date_fmt, show_offset)
853
705
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
854
706
date_str = time.strftime(date_fmt, tt)
855
707
return date_str + offset_str
858
# Cache of formatted offset strings
862
def format_date_with_offset_in_original_timezone(t, offset=0,
863
_cache=_offset_cache):
864
"""Return a formatted date string in the original timezone.
866
This routine may be faster then format_date.
868
:param t: Seconds since the epoch.
869
:param offset: Timezone offset in seconds east of utc.
873
tt = time.gmtime(t + offset)
874
date_fmt = _default_format_by_weekday_num[tt[6]]
875
date_str = time.strftime(date_fmt, tt)
876
offset_str = _cache.get(offset, None)
877
if offset_str is None:
878
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
879
_cache[offset] = offset_str
880
return date_str + offset_str
883
709
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
884
710
show_offset=True):
885
711
"""Return an unicode date string formatted according to the current locale.
1079
_extension_load_failures = []
1082
def failed_to_load_extension(exception):
1083
"""Handle failing to load a binary extension.
1085
This should be called from the ImportError block guarding the attempt to
1086
import the native extension. If this function returns, the pure-Python
1087
implementation should be loaded instead::
1090
>>> import breezy._fictional_extension_pyx
1091
>>> except ImportError, e:
1092
>>> breezy.osutils.failed_to_load_extension(e)
1093
>>> import breezy._fictional_extension_py
1095
# NB: This docstring is just an example, not a doctest, because doctest
1096
# currently can't cope with the use of lazy imports in this namespace --
1099
# This currently doesn't report the failure at the time it occurs, because
1100
# they tend to happen very early in startup when we can't check config
1101
# files etc, and also we want to report all failures but not spam the user
1103
exception_str = str(exception)
1104
if exception_str not in _extension_load_failures:
1105
trace.mutter("failed to load compiled extension: %s" % exception_str)
1106
_extension_load_failures.append(exception_str)
1109
def report_extension_load_failures():
1110
if not _extension_load_failures:
1112
if config.GlobalConfig().suppress_warning('missing_extensions'):
1114
# the warnings framework should by default show this only once
1115
from .trace import warning
1117
"brz: warning: some compiled extensions could not be loaded; "
1118
"see ``brz help missing-extensions``")
1119
# we no longer show the specific missing extensions here, because it makes
1120
# the message too long and scary - see
1121
# https://bugs.launchpad.net/bzr/+bug/430529
1125
from ._chunks_to_lines_pyx import chunks_to_lines
1126
except ImportError as e:
1127
failed_to_load_extension(e)
1128
from ._chunks_to_lines_py import chunks_to_lines
885
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
887
from bzrlib._chunks_to_lines_py import chunks_to_lines
1131
890
def split_lines(s):
1132
891
"""Split s into lines, but without removing the newline characters."""
1133
892
# Trivially convert a fulltext into a 'chunked' representation, and let
1134
893
# chunks_to_lines do the heavy lifting.
1135
if isinstance(s, bytes):
894
if isinstance(s, str):
1136
895
# chunks_to_lines only supports 8-bit strings
1137
896
return chunks_to_lines([s])
1498
1238
normalized_filename = _inaccessible_normalized_filename
1501
def set_signal_handler(signum, handler, restart_syscall=True):
1502
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1503
on platforms that support that.
1505
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1506
automatically restart (by calling `signal.siginterrupt(signum,
1507
False)`). May be ignored if the feature is not available on this
1508
platform or Python version.
1512
siginterrupt = signal.siginterrupt
1514
# This python implementation doesn't provide signal support, hence no
1517
except AttributeError:
1518
# siginterrupt doesn't exist on this platform, or for this version
1520
def siginterrupt(signum, flag): return None
1522
def sig_handler(*args):
1523
# Python resets the siginterrupt flag when a signal is
1524
# received. <http://bugs.python.org/issue8354>
1525
# As a workaround for some cases, set it back the way we want it.
1526
siginterrupt(signum, False)
1527
# Now run the handler function passed to set_signal_handler.
1530
sig_handler = handler
1531
old_handler = signal.signal(signum, sig_handler)
1533
siginterrupt(signum, False)
1537
default_terminal_width = 80
1538
"""The default terminal width for ttys.
1540
This is defined so that higher levels can share a common fallback value when
1541
terminal_width() returns None.
1544
# Keep some state so that terminal_width can detect if _terminal_size has
1545
# returned a different size since the process started. See docstring and
1546
# comments of terminal_width for details.
1547
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1548
_terminal_size_state = 'no_data'
1549
_first_terminal_size = None
1552
1241
def terminal_width():
1553
"""Return terminal width.
1555
None is returned if the width can't established precisely.
1558
- if BRZ_COLUMNS is set, returns its value
1559
- if there is no controlling terminal, returns None
1560
- query the OS, if the queried size has changed since the last query,
1562
- if COLUMNS is set, returns its value,
1563
- if the OS has a value (even though it's never changed), return its value.
1565
From there, we need to query the OS to get the size of the controlling
1568
On Unices we query the OS by:
1569
- get termios.TIOCGWINSZ
1570
- if an error occurs or a negative value is obtained, returns None
1572
On Windows we query the OS by:
1573
- win32utils.get_console_size() decides,
1574
- returns None on error (provided default value)
1576
# Note to implementors: if changing the rules for determining the width,
1577
# make sure you've considered the behaviour in these cases:
1578
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1579
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1581
# - (add more interesting cases here, if you find any)
1582
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1583
# but we don't want to register a signal handler because it is impossible
1584
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1585
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1586
# time so we can notice if the reported size has changed, which should have
1589
# If BRZ_COLUMNS is set, take it, user is always right
1590
# Except if they specified 0 in which case, impose no limit here
1592
width = int(os.environ['BRZ_COLUMNS'])
1593
except (KeyError, ValueError):
1595
if width is not None:
1601
isatty = getattr(sys.stdout, 'isatty', None)
1602
if isatty is None or not isatty():
1603
# Don't guess, setting BRZ_COLUMNS is the recommended way to override.
1607
width, height = os_size = _terminal_size(None, None)
1608
global _first_terminal_size, _terminal_size_state
1609
if _terminal_size_state == 'no_data':
1610
_first_terminal_size = os_size
1611
_terminal_size_state = 'unchanged'
1612
elif (_terminal_size_state == 'unchanged' and
1613
_first_terminal_size != os_size):
1614
_terminal_size_state = 'changed'
1616
# If the OS claims to know how wide the terminal is, and this value has
1617
# ever changed, use that.
1618
if _terminal_size_state == 'changed':
1619
if width is not None and width > 0:
1622
# If COLUMNS is set, use it.
1624
return int(os.environ['COLUMNS'])
1625
except (KeyError, ValueError):
1628
# Finally, use an unchanged size from the OS, if we have one.
1629
if _terminal_size_state == 'unchanged':
1630
if width is not None and width > 0:
1633
# The width could not be determined.
1637
def _win32_terminal_size(width, height):
1638
width, height = win32utils.get_console_size(
1639
defaultx=width, defaulty=height)
1640
return width, height
1643
def _ioctl_terminal_size(width, height):
1242
"""Return estimated terminal width."""
1243
if sys.platform == 'win32':
1244
return win32utils.get_console_size()[0]
1247
import struct, fcntl, termios
1648
1248
s = struct.pack('HHHH', 0, 0, 0, 0)
1649
1249
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1650
height, width = struct.unpack('HHHH', x)[0:2]
1651
except (IOError, AttributeError):
1250
width = struct.unpack('HHHH', x)[1]
1653
return width, height
1656
_terminal_size = None
1657
"""Returns the terminal size as (width, height).
1659
:param width: Default value for width.
1660
:param height: Default value for height.
1662
This is defined specifically for each OS and query the size of the controlling
1663
terminal. If any error occurs, the provided default values should be returned.
1665
if sys.platform == 'win32':
1666
_terminal_size = _win32_terminal_size
1668
_terminal_size = _ioctl_terminal_size
1671
def supports_executable(path):
1672
"""Return if filesystem at path supports executable bit.
1674
:param path: Path for which to check the file system
1675
:return: boolean indicating whether executable bit can be stored/relied upon
1677
if sys.platform == 'win32':
1680
fs_type = get_fs_type(path)
1681
except errors.DependencyNotPresent as e:
1682
trace.mutter('Unable to get fs type for %r: %s', path, e)
1684
if fs_type in ('vfat', 'ntfs'):
1685
# filesystems known to not support executable bit
1690
def supports_symlinks(path):
1691
"""Return if the filesystem at path supports the creation of symbolic links.
1694
if not has_symlinks():
1697
fs_type = get_fs_type(path)
1698
except errors.DependencyNotPresent as e:
1699
trace.mutter('Unable to get fs type for %r: %s', path, e)
1701
if fs_type in ('vfat', 'ntfs'):
1702
# filesystems known to not support symlinks
1255
width = int(os.environ['COLUMNS'])
1264
def supports_executable():
1265
return sys.platform != "win32"
1707
1268
def supports_posix_readonly():
2022
1583
real_handlers[kind](abspath, relpath)
2025
def copy_ownership_from_path(dst, src=None):
2026
"""Copy usr/grp ownership from src file/dir to dst file/dir.
2028
If src is None, the containing directory is used as source. If chown
2029
fails, the error is ignored and a warning is printed.
2031
chown = getattr(os, 'chown', None)
2036
src = os.path.dirname(dst)
2042
chown(dst, s.st_uid, s.st_gid)
2045
'Unable to copy ownership from "%s" to "%s". '
2046
'You may want to set it manually.', src, dst)
2047
trace.log_exception_quietly()
2050
1586
def path_prefix_key(path):
2051
1587
"""Generate a prefix-order path key for path.
2053
1589
This can be used to sort paths in the same way that walkdirs does.
2055
return (dirname(path), path)
1591
return (dirname(path) , path)
2058
1594
def compare_paths_prefix_order(path_a, path_b):
2059
1595
"""Compare path_a and path_b to generate the same order walkdirs uses."""
2060
1596
key_a = path_prefix_key(path_a)
2061
1597
key_b = path_prefix_key(path_b)
2062
return (key_a > key_b) - (key_a < key_b)
1598
return cmp(key_a, key_b)
2065
1601
_cached_user_encoding = None
2068
def get_user_encoding():
1604
def get_user_encoding(use_cache=True):
2069
1605
"""Find out what the preferred user encoding is.
2071
1607
This is generally the encoding that is used for command line parameters
2072
1608
and file contents. This may be different from the terminal encoding
2073
1609
or the filesystem encoding.
1611
:param use_cache: Enable cache for detected encoding.
1612
(This parameter is turned on by default,
1613
and required only for selftesting)
2075
1615
:return: A string defining the preferred user encoding
2077
1617
global _cached_user_encoding
2078
if _cached_user_encoding is not None:
1618
if _cached_user_encoding is not None and use_cache:
2079
1619
return _cached_user_encoding
2081
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2082
# Use the existing locale settings and call nl_langinfo directly
2083
# rather than going through getpreferredencoding. This avoids
2084
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2085
# possibility of the setlocale call throwing an error.
2086
user_encoding = locale.nl_langinfo(locale.CODESET)
1621
if sys.platform == 'darwin':
1622
# python locale.getpreferredencoding() always return
1623
# 'mac-roman' on darwin. That's a lie.
1624
sys.platform = 'posix'
1626
if os.environ.get('LANG', None) is None:
1627
# If LANG is not set, we end up with 'ascii', which is bad
1628
# ('mac-roman' is more than ascii), so we set a default which
1629
# will give us UTF-8 (which appears to work in all cases on
1630
# OSX). Users are still free to override LANG of course, as
1631
# long as it give us something meaningful. This work-around
1632
# *may* not be needed with python 3k and/or OSX 10.5, but will
1633
# work with them too -- vila 20080908
1634
os.environ['LANG'] = 'en_US.UTF-8'
1637
sys.platform = 'darwin'
2088
# GZ 2011-12-19: On windows could call GetACP directly instead.
2089
user_encoding = locale.getpreferredencoding(False)
2092
user_encoding = codecs.lookup(user_encoding).name
2094
if user_encoding not in ("", "cp0"):
2095
sys.stderr.write('brz: warning:'
1642
user_encoding = locale.getpreferredencoding()
1643
except locale.Error, e:
1644
sys.stderr.write('bzr: warning: %s\n'
1645
' Could not determine what text encoding to use.\n'
1646
' This error usually means your Python interpreter\n'
1647
' doesn\'t support the locale set by $LANG (%s)\n'
1648
" Continuing with ascii encoding.\n"
1649
% (e, os.environ.get('LANG')))
1650
user_encoding = 'ascii'
1652
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1653
# treat that as ASCII, and not support printing unicode characters to the
1656
# For python scripts run under vim, we get '', so also treat that as ASCII
1657
if user_encoding in (None, 'cp0', ''):
1658
user_encoding = 'ascii'
1662
codecs.lookup(user_encoding)
1664
sys.stderr.write('bzr: warning:'
2096
1665
' unknown encoding %s.'
2097
1666
' Continuing with ascii encoding.\n'
2098
1667
% user_encoding
2100
user_encoding = 'ascii'
2102
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2103
if user_encoding == 'ascii':
2104
if sys.platform == 'darwin':
2105
# OSX is special-cased in Python to have a UTF-8 filesystem
2106
# encoding and previously had LANG set here if not present.
2107
user_encoding = 'utf-8'
2108
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2109
# for some other posix platforms as well.
2111
_cached_user_encoding = user_encoding
1669
user_encoding = 'ascii'
1672
_cached_user_encoding = user_encoding
2112
1674
return user_encoding
2115
def get_diff_header_encoding():
2116
return get_terminal_encoding()
2119
1677
def get_host_name():
2120
1678
"""Return the current unicode host name.
2123
1681
behaves inconsistently on different platforms.
2125
1683
if sys.platform == "win32":
2126
1685
return win32utils.get_host_name()
2130
return socket.gethostname()
2131
1688
return socket.gethostname().decode(get_user_encoding())
2134
# We must not read/write any more than 64k at a time from/to a socket so we
2135
# don't risk "no buffer space available" errors on some platforms. Windows in
2136
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2138
MAX_SOCKET_CHUNK = 64 * 1024
2140
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2141
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2142
_eno = getattr(errno, _eno, None)
2143
if _eno is not None:
2144
_end_of_stream_errors.append(_eno)
2148
def read_bytes_from_socket(sock, report_activity=None,
2149
max_read_size=MAX_SOCKET_CHUNK):
2150
"""Read up to max_read_size of bytes from sock and notify of progress.
2152
Translates "Connection reset by peer" into file-like EOF (return an
2153
empty string rather than raise an error), and repeats the recv if
2154
interrupted by a signal.
2158
data = sock.recv(max_read_size)
2159
except socket.error as e:
2161
if eno in _end_of_stream_errors:
2162
# The connection was closed by the other side. Callers expect
2163
# an empty string to signal end-of-stream.
2165
elif eno == errno.EINTR:
2166
# Retry the interrupted recv.
2170
if report_activity is not None:
2171
report_activity(len(data), 'read')
2175
def recv_all(socket, count):
1691
def recv_all(socket, bytes):
2176
1692
"""Receive an exact number of bytes.
2178
1694
Regular Socket.recv() may return less than the requested number of bytes,
2179
depending on what's in the OS buffer. MSG_WAITALL is not available
1695
dependning on what's in the OS buffer. MSG_WAITALL is not available
2180
1696
on all platforms, but this should work everywhere. This will return
2181
1697
less than the requested amount if the remote end closes.
2183
1699
This isn't optimized and is intended mostly for use in testing.
2186
while len(b) < count:
2187
new = read_bytes_from_socket(socket, None, count - len(b))
1702
while len(b) < bytes:
1703
new = until_no_eintr(socket.recv, bytes - len(b))
2194
def send_all(sock, bytes, report_activity=None):
1710
def send_all(socket, bytes, report_activity=None):
2195
1711
"""Send all bytes on a socket.
2197
Breaks large blocks in smaller chunks to avoid buffering limitations on
2198
some platforms, and catches EINTR which may be thrown if the send is
2199
interrupted by a signal.
2201
This is preferred to socket.sendall(), because it avoids portability bugs
2202
and provides activity reporting.
1713
Regular socket.sendall() can give socket error 10053 on Windows. This
1714
implementation sends no more than 64k at a time, which avoids this problem.
2204
1716
:param report_activity: Call this as bytes are read, see
2205
1717
Transport._report_activity
2208
byte_count = len(bytes)
2209
view = memoryview(bytes)
2210
while sent_total < byte_count:
2212
sent = sock.send(view[sent_total:sent_total + MAX_SOCKET_CHUNK])
2213
except (socket.error, IOError) as e:
2214
if e.args[0] in _end_of_stream_errors:
2215
raise errors.ConnectionReset(
2216
"Error trying to write to socket", e)
2217
if e.args[0] != errno.EINTR:
2221
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2224
if report_activity is not None:
2225
report_activity(sent, 'write')
2228
def connect_socket(address):
2229
# Slight variation of the socket.create_connection() function (provided by
2230
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2231
# provide it for previous python versions. Also, we don't use the timeout
2232
# parameter (provided by the python implementation) so we don't implement
2234
err = socket.error('getaddrinfo returns an empty list')
2235
host, port = address
2236
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2237
af, socktype, proto, canonname, sa = res
2240
sock = socket.socket(af, socktype, proto)
2244
except socket.error as e:
2246
# 'err' is now the most recent error
2247
if sock is not None:
1720
for pos in xrange(0, len(bytes), chunk_size):
1721
block = bytes[pos:pos+chunk_size]
1722
if report_activity is not None:
1723
report_activity(len(block), 'write')
1724
until_no_eintr(socket.sendall, block)
2252
1727
def dereference_path(path):
2280
1755
If and when pkg_resources becomes a standard library, this routine
2281
1756
can delegate to it.
2283
# Check package name is within breezy
2284
if package == "breezy":
1758
# Check package name is within bzrlib
1759
if package == "bzrlib":
2285
1760
resource_relpath = resource_name
2286
elif package.startswith("breezy."):
2287
package = package[len("breezy."):].replace('.', os.sep)
1761
elif package.startswith("bzrlib."):
1762
package = package[len("bzrlib."):].replace('.', os.sep)
2288
1763
resource_relpath = pathjoin(package, resource_name)
2290
raise errors.BzrError('resource package %s not in breezy' % package)
1765
raise errors.BzrError('resource package %s not in bzrlib' % package)
2292
1767
# Map the resource to a file and read its contents
2293
base = dirname(breezy.__file__)
1768
base = dirname(bzrlib.__file__)
2294
1769
if getattr(sys, 'frozen', None): # bzr.exe
2295
1770
base = abspath(pathjoin(base, '..', '..'))
2296
with open(pathjoin(base, resource_relpath), "rt") as f:
1771
filename = pathjoin(base, resource_relpath)
1772
return open(filename, 'rU').read()
2300
1775
def file_kind_from_stat_mode_thunk(mode):
2301
1776
global file_kind_from_stat_mode
2302
1777
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2304
from ._readdir_pyx import UTF8DirReader
1779
from bzrlib._readdir_pyx import UTF8DirReader
2305
1780
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2306
1781
except ImportError:
2307
# This is one time where we won't warn that an extension failed to
2308
# load. The extension is never available on Windows anyway.
2309
from ._readdir_py import (
1782
from bzrlib._readdir_py import (
2310
1783
_kind_from_mode as file_kind_from_stat_mode
2312
1785
return file_kind_from_stat_mode(mode)
2315
1786
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2318
def file_stat(f, _lstat=os.lstat):
1789
def file_kind(f, _lstat=os.lstat):
2322
except OSError as e:
1791
return file_kind_from_stat_mode(_lstat(f).st_mode)
2323
1793
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2324
1794
raise errors.NoSuchFile(f)
2328
def file_kind(f, _lstat=os.lstat):
2329
stat_value = file_stat(f, _lstat)
2330
return file_kind_from_stat_mode(stat_value.st_mode)
2333
1798
def until_no_eintr(f, *a, **kw):
2334
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2336
WARNING: you must be certain that it is safe to retry the call repeatedly
2337
if EINTR does occur. This is typically only true for low-level operations
2338
like os.read. If in any doubt, don't use this.
2340
Keep in mind that this is not a complete solution to EINTR. There is
2341
probably code in the Python standard library and other dependencies that
2342
may encounter EINTR if a signal arrives (and there is signal handler for
2343
that signal). So this function can reduce the impact for IO that breezy
2344
directly controls, but it is not a complete solution.
1799
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2346
1800
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2349
1803
return f(*a, **kw)
2350
except (IOError, OSError) as e:
1804
except (IOError, OSError), e:
2351
1805
if e.errno == errno.EINTR:
1809
def re_compile_checked(re_string, flags=0, where=""):
1810
"""Return a compiled re, or raise a sensible error.
1812
This should only be used when compiling user-supplied REs.
1814
:param re_string: Text form of regular expression.
1815
:param flags: eg re.IGNORECASE
1816
:param where: Message explaining to the user the context where
1817
it occurred, eg 'log search filter'.
1819
# from https://bugs.launchpad.net/bzr/+bug/251352
1821
re_obj = re.compile(re_string, flags)
1826
where = ' in ' + where
1827
# despite the name 'error' is a type
1828
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
1829
% (where, re_string, e))
2356
1832
if sys.platform == "win32":
2359
1835
return msvcrt.getch()
2364
1840
fd = sys.stdin.fileno()
2365
1841
settings = termios.tcgetattr(fd)
2370
1846
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2373
if sys.platform.startswith('linux'):
1850
if sys.platform == 'linux2':
2374
1851
def _local_concurrency():
2376
return os.sysconf('SC_NPROCESSORS_ONLN')
2377
except (ValueError, OSError, AttributeError):
1853
prefix = 'processor'
1854
for line in file('/proc/cpuinfo', 'rb'):
1855
if line.startswith(prefix):
1856
concurrency = int(line[line.find(':')+1:]) + 1
2379
1858
elif sys.platform == 'darwin':
2380
1859
def _local_concurrency():
2381
1860
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2382
1861
stdout=subprocess.PIPE).communicate()[0]
2383
elif "bsd" in sys.platform:
1862
elif sys.platform[0:7] == 'freebsd':
2384
1863
def _local_concurrency():
2385
1864
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2386
1865
stdout=subprocess.PIPE).communicate()[0]
2387
1866
elif sys.platform == 'sunos5':
2388
1867
def _local_concurrency():
2389
return subprocess.Popen(['psrinfo', '-p', ],
1868
return subprocess.Popen(['psrinfo', '-p',],
2390
1869
stdout=subprocess.PIPE).communicate()[0]
2391
1870
elif sys.platform == "win32":
2392
1871
def _local_concurrency():
2408
1886
anything goes wrong.
2410
1888
global _cached_local_concurrency
2412
1889
if _cached_local_concurrency is not None and use_cache:
2413
1890
return _cached_local_concurrency
2415
concurrency = os.environ.get('BRZ_CONCURRENCY', None)
2416
if concurrency is None:
2417
import multiprocessing
2419
concurrency = multiprocessing.cpu_count()
2420
except NotImplementedError:
2421
# multiprocessing.cpu_count() isn't implemented on all platforms
2423
concurrency = _local_concurrency()
2424
except (OSError, IOError):
1893
concurrency = _local_concurrency()
1894
except (OSError, IOError):
2427
1897
concurrency = int(concurrency)
2428
1898
except (TypeError, ValueError):
2429
1899
concurrency = 1
2431
_cached_local_concurrency = concurrency
1901
_cached_concurrency = concurrency
2432
1902
return concurrency
2435
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2436
"""A stream writer that doesn't decode str arguments."""
2438
def __init__(self, encode, stream, errors='strict'):
2439
codecs.StreamWriter.__init__(self, stream, errors)
2440
self.encode = encode
2442
def write(self, object):
2443
if isinstance(object, str):
2444
self.stream.write(object)
2446
data, _ = self.encode(object, self.errors)
2447
self.stream.write(data)
2450
if sys.platform == 'win32':
2451
def open_file(filename, mode='r', bufsize=-1):
2452
"""This function is used to override the ``open`` builtin.
2454
But it uses O_NOINHERIT flag so the file handle is not inherited by
2455
child processes. Deleting or renaming a closed file opened with this
2456
function is not blocking child processes.
2458
writing = 'w' in mode
2459
appending = 'a' in mode
2460
updating = '+' in mode
2461
binary = 'b' in mode
2464
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2465
# for flags for each modes.
2475
flags |= os.O_WRONLY
2476
flags |= os.O_CREAT | os.O_TRUNC
2481
flags |= os.O_WRONLY
2482
flags |= os.O_CREAT | os.O_APPEND
2487
flags |= os.O_RDONLY
2489
return os.fdopen(os.open(filename, flags), mode, bufsize)
2494
def available_backup_name(base, exists):
2495
"""Find a non-existing backup file name.
2497
This will *not* create anything, this only return a 'free' entry. This
2498
should be used for checking names in a directory below a locked
2499
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2500
Leap) and generally discouraged.
2502
:param base: The base name.
2504
:param exists: A callable returning True if the path parameter exists.
2507
name = "%s.~%d~" % (base, counter)
2510
name = "%s.~%d~" % (base, counter)
2514
def set_fd_cloexec(fd):
2515
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2516
support for this is not available.
2520
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2521
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2522
except (ImportError, AttributeError):
2523
# Either the fcntl module or specific constants are not present
2527
def find_executable_on_path(name):
2528
"""Finds an executable on the PATH.
2530
On Windows, this will try to append each extension in the PATHEXT
2531
environment variable to the name, if it cannot be found with the name
2534
:param name: The base name of the executable.
2535
:return: The path to the executable found or None.
2537
if sys.platform == 'win32':
2538
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2539
exts = [ext.lower() for ext in exts]
2540
base, ext = os.path.splitext(name)
2542
if ext.lower() not in exts:
2548
path = os.environ.get('PATH')
2549
if path is not None:
2550
path = path.split(os.pathsep)
2553
f = os.path.join(d, name) + ext
2554
if os.access(f, os.X_OK):
2556
if sys.platform == 'win32':
2557
app_path = win32utils.get_app_path(name)
2558
if app_path != name:
2563
def _posix_is_local_pid_dead(pid):
2564
"""True if pid doesn't correspond to live process on this machine"""
2566
# Special meaning of unix kill: just check if it's there.
2568
except OSError as e:
2569
if e.errno == errno.ESRCH:
2570
# On this machine, and really not found: as sure as we can be
2573
elif e.errno == errno.EPERM:
2574
# exists, though not ours
2577
trace.mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2578
# Don't really know.
2581
# Exists and our process: not dead.
2585
if sys.platform == "win32":
2586
is_local_pid_dead = win32utils.is_local_pid_dead
2588
is_local_pid_dead = _posix_is_local_pid_dead
2590
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2591
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2592
if getattr(errno, name, None) is not None]
2595
def fdatasync(fileno):
2596
"""Flush file contents to disk if possible.
2598
:param fileno: Integer OS file handle.
2599
:raises TransportNotPossible: If flushing to disk is not possible.
2601
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2605
except IOError as e:
2606
# See bug #1075108, on some platforms fdatasync exists, but can
2607
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2608
# and reduce the chance of corruption-on-powerloss situations. It
2609
# is not a mandatory call, so it is ok to suppress failures.
2610
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2611
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2615
def ensure_empty_directory_exists(path, exception_class):
2616
"""Make sure a local directory exists and is empty.
2618
If it does not exist, it is created. If it exists and is not empty, an
2619
instance of exception_class is raised.
2623
except OSError as e:
2624
if e.errno != errno.EEXIST:
2626
if os.listdir(path) != []:
2627
raise exception_class(path)
2630
def is_environment_error(evalue):
2631
"""True if exception instance is due to a process environment issue
2633
This includes OSError and IOError, but also other errors that come from
2634
the operating system or core libraries but are not subclasses of those.
2636
if isinstance(evalue, (EnvironmentError, select.error)):
2638
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
2643
def read_mtab(path):
2644
"""Read an fstab-style file and extract mountpoint+filesystem information.
2646
:param path: Path to read from
2647
:yield: Tuples with mountpoints (as bytestrings) and filesystem names
2649
with open(path, 'rb') as f:
2651
if line.startswith(b'#'):
2656
yield cols[1], cols[2].decode('ascii', 'replace')
2659
MTAB_PATH = '/etc/mtab'
2661
class FilesystemFinder(object):
2662
"""Find the filesystem for a particular path."""
2664
def __init__(self, mountpoints):
2667
self._mountpoints = sorted(mountpoints, key=key, reverse=True)
2671
"""Create a FilesystemFinder from an mtab-style file.
2673
Note that this will silenty ignore mtab if it doesn't exist or can not
2676
# TODO(jelmer): Use inotify to be notified when /etc/mtab changes and
2677
# we need to re-read it.
2679
return cls(read_mtab(MTAB_PATH))
2680
except EnvironmentError as e:
2681
trace.mutter('Unable to read mtab: %s', e)
2684
def find(self, path):
2685
"""Find the filesystem used by a particular path.
2687
:param path: Path to find (bytestring or text type)
2688
:return: Filesystem name (as text type) or None, if the filesystem is
2691
for mountpoint, filesystem in self._mountpoints:
2692
if is_inside(mountpoint, path):
2697
_FILESYSTEM_FINDER = None
2700
def get_fs_type(path):
2701
"""Return the filesystem type for the partition a path is in.
2703
:param path: Path to search filesystem type for
2704
:return: A FS type, as string. E.g. "ext2"
2706
global _FILESYSTEM_FINDER
2707
if _FILESYSTEM_FINDER is None:
2708
_FILESYSTEM_FINDER = FilesystemFinder.from_mtab()
2710
if not isinstance(path, bytes):
2711
path = path.encode(_fs_enc)
2713
return _FILESYSTEM_FINDER.find(path)
2717
perf_counter = time.perf_counter
2719
perf_counter = time.clock