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
25
from bzrlib.lazy_import import lazy_import
27
from .lazy_import import lazy_import
26
28
lazy_import(globals(), """
27
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,
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 (
44
from tempfile import mkdtemp
52
from breezy.i18n import gettext
57
from bzrlib.symbol_versioning import (
62
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
64
if sys.version_info < (2, 5):
65
import md5 as _mod_md5
67
import sha as _mod_sha
77
from bzrlib import symbol_versioning
80
# Cross platform wall-clock time functionality with decent resolution.
81
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
82
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
83
# synchronized with ``time.time()``, this is only meant to be used to find
84
# delta times by subtracting from another call to this function.
85
timer_func = time.time
86
if sys.platform == 'win32':
87
timer_func = time.clock
89
73
# On win32, O_BINARY is used to indicate the file should
90
74
# be opened in binary mode, rather than text mode.
97
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
100
93
def get_unicode_argv():
102
97
user_encoding = get_user_encoding()
103
98
return [a.decode(user_encoding) for a in sys.argv[1:]]
104
99
except UnicodeDecodeError:
105
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
100
raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
101
"application locale.").format(a, user_encoding))
109
104
def make_readonly(filename):
110
105
"""Make a filename read-only."""
111
106
mod = os.lstat(filename).st_mode
112
107
if not stat.S_ISLNK(mod):
114
os.chmod(filename, mod)
109
chmod_if_possible(filename, mod)
117
112
def make_writable(filename):
118
113
mod = os.lstat(filename).st_mode
119
114
if not stat.S_ISLNK(mod):
121
os.chmod(filename, 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" % (
124
138
def minimum_path_selection(paths):
233
252
file_existed = False
235
254
rename_func(new, tmp_name)
236
except (errors.NoSuchFile,), e:
255
except (errors.NoSuchFile,):
239
258
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
240
259
# function raises an IOError with errno is None when a rename fails.
241
260
# This then gets caught here.
242
261
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
263
except Exception as e:
245
264
if (getattr(e, 'errno', None) is None
246
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
265
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
249
268
file_existed = True
255
# This may throw an exception, in which case success will
257
rename_func(old, new)
259
except (IOError, OSError), e:
260
# source and target may be aliases of each other (e.g. on a
261
# case-insensitive filesystem), so we may have accidentally renamed
262
# source by when we tried to rename target
263
failure_exc = sys.exc_info()
264
if (file_existed and e.errno in (None, errno.ENOENT)
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)
265
281
and old.lower() == new.lower()):
266
# source and target are the same file on a case-insensitive
267
# filesystem, so we don't generate an exception
282
# source and target are the same file on a case-insensitive
283
# filesystem, so we don't generate an exception
271
289
# If the file used to exist, rename it back into place
274
292
unlink_func(tmp_name)
276
294
rename_func(tmp_name, new)
277
if failure_exc is not None:
278
raise failure_exc[0], failure_exc[1], failure_exc[2]
281
297
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
282
298
# choke on a Unicode string containing a relative path if
283
299
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
285
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
286
301
def _posix_abspath(path):
287
302
# jam 20060426 rather than encoding to fsencoding
288
303
# copy posixpath.abspath, but use os.getcwdu instead
289
304
if not posixpath.isabs(path):
290
305
path = posixpath.join(getcwd(), path)
291
return posixpath.normpath(path)
306
return _posix_normpath(path)
294
309
def _posix_realpath(path):
295
310
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))
298
368
def _win32_fixdrive(path):
299
369
"""Force drive letters to be consistent.
304
374
running python.exe under cmd.exe return capital C:\\
305
375
running win32 python inside a cygwin shell returns lowercase c:\\
307
drive, path = _nt_splitdrive(path)
377
drive, path = ntpath.splitdrive(path)
308
378
return drive.upper() + path
311
381
def _win32_abspath(path):
312
# Real _nt_abspath doesn't have a problem with a unicode cwd
313
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
316
def _win98_abspath(path):
317
"""Return the absolute version of a path.
318
Windows 98 safe implementation (python reimplementation
319
of Win32 API function GetFullPathNameW)
324
# \\HOST\path => //HOST/path
325
# //HOST/path => //HOST/path
326
# path => C:/cwd/path
329
# check for absolute path
330
drive = _nt_splitdrive(path)[0]
331
if drive == '' and path[:2] not in('//','\\\\'):
333
# we cannot simply os.path.join cwd and path
334
# because os.path.join('C:','/path') produce '/path'
335
# and this is incorrect
336
if path[:1] in ('/','\\'):
337
cwd = _nt_splitdrive(cwd)[0]
339
path = cwd + '\\' + path
340
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
382
# Real ntpath.abspath doesn't have a problem with a unicode cwd
383
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
343
386
def _win32_realpath(path):
344
# Real _nt_realpath doesn't have a problem with a unicode cwd
345
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
387
# Real ntpath.realpath doesn't have a problem with a unicode cwd
388
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
348
391
def _win32_pathjoin(*args):
349
return _nt_join(*args).replace('\\', '/')
392
return ntpath.join(*args).replace('\\', '/')
352
395
def _win32_normpath(path):
353
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
396
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
356
399
def _win32_getcwd():
357
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
400
return _win32_fixdrive(_getcwd().replace('\\', '/'))
360
403
def _win32_mkdtemp(*args, **kwargs):
361
404
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
364
def _add_rename_error_details(e, old, new):
365
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
366
% (old, new, e.strerror))
368
new_e.to_filename = new
372
407
def _win32_rename(old, new):
373
408
"""We expect to be able to atomically replace 'new' with old.
390
def _wrapped_rename(old, new):
391
"""Rename a file or directory"""
394
except (IOError, OSError), e:
395
# this is eventually called by all rename-like functions, so should
397
raise _add_rename_error_details(e, old, new)
400
425
def _mac_getcwd():
401
return unicodedata.normalize('NFC', os.getcwdu())
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)
404
459
# Default is to just use the python builtins, but these can be rebound on
405
460
# particular platforms.
406
461
abspath = _posix_abspath
407
462
realpath = _posix_realpath
408
463
pathjoin = os.path.join
409
normpath = os.path.normpath
410
rename = _wrapped_rename # overridden below on win32
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
412
469
dirname = os.path.dirname
413
470
basename = os.path.basename
414
471
split = os.path.split
415
472
splitext = os.path.splitext
416
# These were already imported into local scope
473
# These were already lazily imported into local scope
417
474
# mkdtemp = tempfile.mkdtemp
418
475
# rmtree = shutil.rmtree
420
484
MIN_ABS_PATHLENGTH = 1
423
487
if sys.platform == 'win32':
424
if win32utils.winver == 'Windows 98':
425
abspath = _win98_abspath
427
abspath = _win32_abspath
488
abspath = _win32_abspath
428
489
realpath = _win32_realpath
429
490
pathjoin = _win32_pathjoin
430
491
normpath = _win32_normpath
431
492
getcwd = _win32_getcwd
432
493
mkdtemp = _win32_mkdtemp
433
rename = _win32_rename
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
435
504
MIN_ABS_PATHLENGTH = 3
472
544
On my standard US Windows XP, the preferred encoding is
473
545
cp1252, but the console is cp437
547
:param trace: If True trace the selected encoding via mutter().
475
from bzrlib.trace import mutter
549
from .trace import mutter
476
550
output_encoding = getattr(sys.stdout, 'encoding', None)
477
551
if not output_encoding:
478
552
input_encoding = getattr(sys.stdin, 'encoding', None)
479
553
if not input_encoding:
480
554
output_encoding = get_user_encoding()
481
mutter('encoding stdout as osutils.get_user_encoding() %r',
556
mutter('encoding stdout as osutils.get_user_encoding() %r',
484
559
output_encoding = input_encoding
485
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
561
mutter('encoding stdout as sys.stdin encoding %r',
487
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
565
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
488
566
if output_encoding == 'cp0':
489
567
# invalid encoding (cp0 means 'no codepage' on Windows)
490
568
output_encoding = get_user_encoding()
491
mutter('cp0 is invalid encoding.'
492
' encoding stdout as osutils.get_user_encoding() %r',
570
mutter('cp0 is invalid encoding.'
571
' encoding stdout as osutils.get_user_encoding() %r',
496
575
codecs.lookup(output_encoding)
497
576
except LookupError:
498
sys.stderr.write('bzr: warning:'
577
sys.stderr.write('brz: warning:'
499
578
' unknown terminal encoding %s.\n'
500
579
' Using encoding %s instead.\n'
501
580
% (output_encoding, get_user_encoding())
503
582
output_encoding = get_user_encoding()
505
584
return output_encoding
879
977
return '%d hours, %d minute%s %s' % (hours, minutes,
880
978
plural_minutes, direction)
883
982
"""Return size of given open file."""
884
return os.fstat(f.fileno())[ST_SIZE]
887
# Define rand_bytes based on platform.
889
# Python 2.4 and later have os.urandom,
890
# but it doesn't work on some arches
892
rand_bytes = os.urandom
893
except (NotImplementedError, AttributeError):
894
# If python doesn't have os.urandom, or it doesn't work,
895
# then try to first pull random data from /dev/urandom
983
return os.fstat(f.fileno())[stat.ST_SIZE]
986
# Alias os.urandom to support platforms (which?) without /dev/urandom and
987
# override if it doesn't work. Avoid checking on windows where there is
988
# significant initialisation cost that can be avoided for some bzr calls.
990
rand_bytes = os.urandom
992
if rand_bytes.__module__ != "nt":
897
rand_bytes = file('/dev/urandom', 'rb').read
898
# Otherwise, use this hack as a last resort
899
except (IOError, OSError):
995
except NotImplementedError:
900
996
# not well seeded, but better than nothing
901
997
def rand_bytes(n):
918
1016
for raw_byte in rand_bytes(num):
919
s += ALNUM[ord(raw_byte) % 36]
1018
s += ALNUM[ord(raw_byte) % 36]
1020
s += ALNUM[raw_byte % 36]
923
## TODO: We could later have path objects that remember their list
924
## decomposition (might be too tricksy though.)
1024
# TODO: We could later have path objects that remember their list
1025
# decomposition (might be too tricksy though.)
926
1027
def splitpath(p):
927
1028
"""Turn string into list of parts."""
928
# split on either delimiter because people might use either on
930
ps = re.split(r'[\\/]', p)
1029
use_bytes = isinstance(p, bytes)
1030
if os.path.sep == '\\':
1031
# split on either delimiter because people might use either on
1034
ps = re.split(b'[\\\\/]', p)
1036
ps = re.split(r'[\\/]', p)
1045
current_empty_dir = (b'.', b'')
1048
current_empty_dir = ('.', '')
935
raise errors.BzrError("sorry, %r not allowed in path" % f)
936
elif (f == '.') or (f == ''):
1053
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1054
elif f in current_empty_dir:
994
1111
def report_extension_load_failures():
995
1112
if not _extension_load_failures:
997
from bzrlib.config import GlobalConfig
998
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1114
if config.GlobalConfig().suppress_warning('missing_extensions'):
1000
1116
# the warnings framework should by default show this only once
1001
from bzrlib.trace import warning
1117
from .trace import warning
1003
"bzr: warning: some compiled extensions could not be loaded; "
1004
"see <https://answers.launchpad.net/bzr/+faq/703>")
1119
"brz: warning: some compiled extensions could not be loaded; "
1120
"see ``brz help missing-extensions``")
1005
1121
# we no longer show the specific missing extensions here, because it makes
1006
1122
# the message too long and scary - see
1007
1123
# https://bugs.launchpad.net/bzr/+bug/430529
1011
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1012
except ImportError, e:
1127
from ._chunks_to_lines_pyx import chunks_to_lines
1128
except ImportError as e:
1013
1129
failed_to_load_extension(e)
1014
from bzrlib._chunks_to_lines_py import chunks_to_lines
1130
from ._chunks_to_lines_py import chunks_to_lines
1017
1133
def split_lines(s):
1018
1134
"""Split s into lines, but without removing the newline characters."""
1019
1135
# Trivially convert a fulltext into a 'chunked' representation, and let
1020
1136
# chunks_to_lines do the heavy lifting.
1021
if isinstance(s, str):
1137
if isinstance(s, bytes):
1022
1138
# chunks_to_lines only supports 8-bit strings
1023
1139
return chunks_to_lines([s])
1285
1420
return unicode_or_utf8_string.encode('utf-8')
1288
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1289
' Revision id generators should be creating utf8'
1293
def safe_revision_id(unicode_or_utf8_string, warn=True):
1423
def safe_revision_id(unicode_or_utf8_string):
1294
1424
"""Revision ids should now be utf8, but at one point they were unicode.
1296
1426
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1298
:param warn: Functions that are sanitizing user data can set warn=False
1299
1428
:return: None or a utf8 revision id.
1301
1430
if (unicode_or_utf8_string is None
1302
or unicode_or_utf8_string.__class__ == str):
1431
or unicode_or_utf8_string.__class__ == bytes):
1303
1432
return unicode_or_utf8_string
1305
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1307
return cache_utf8.encode(unicode_or_utf8_string)
1310
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1311
' generators should be creating utf8 file ids.')
1314
def safe_file_id(unicode_or_utf8_string, warn=True):
1433
raise TypeError('Unicode revision ids are no longer supported. '
1434
'Revision id generators should be creating utf8 revision '
1438
def safe_file_id(unicode_or_utf8_string):
1315
1439
"""File ids should now be utf8, but at one point they were unicode.
1317
1441
This is the same as safe_utf8, except it uses the cached encode functions
1425
1557
None is returned if the width can't established precisely.
1428
- if BZR_COLUMNS is set, returns its value
1560
- if BRZ_COLUMNS is set, returns its value
1429
1561
- if there is no controlling terminal, returns None
1562
- query the OS, if the queried size has changed since the last query,
1430
1564
- if COLUMNS is set, returns its value,
1565
- if the OS has a value (even though it's never changed), return its value.
1432
1567
From there, we need to query the OS to get the size of the controlling
1570
On Unices we query the OS by:
1436
1571
- get termios.TIOCGWINSZ
1437
1572
- if an error occurs or a negative value is obtained, returns None
1574
On Windows we query the OS by:
1441
1575
- win32utils.get_console_size() decides,
1442
1576
- returns None on error (provided default value)
1578
# Note to implementors: if changing the rules for determining the width,
1579
# make sure you've considered the behaviour in these cases:
1580
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1581
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1583
# - (add more interesting cases here, if you find any)
1584
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1585
# but we don't want to register a signal handler because it is impossible
1586
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1587
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1588
# time so we can notice if the reported size has changed, which should have
1445
# If BZR_COLUMNS is set, take it, user is always right
1591
# If BRZ_COLUMNS is set, take it, user is always right
1592
# Except if they specified 0 in which case, impose no limit here
1447
return int(os.environ['BZR_COLUMNS'])
1594
width = int(os.environ['BRZ_COLUMNS'])
1448
1595
except (KeyError, ValueError):
1597
if width is not None:
1451
1603
isatty = getattr(sys.stdout, 'isatty', None)
1452
if isatty is None or not isatty():
1453
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1604
if isatty is None or not isatty():
1605
# Don't guess, setting BRZ_COLUMNS is the recommended way to override.
1456
# If COLUMNS is set, take it, the terminal knows better (even inside a
1457
# given terminal, the application can decide to set COLUMNS to a lower
1458
# value (splitted screen) or a bigger value (scroll bars))
1609
width, height = os_size = _terminal_size(None, None)
1610
global _first_terminal_size, _terminal_size_state
1611
if _terminal_size_state == 'no_data':
1612
_first_terminal_size = os_size
1613
_terminal_size_state = 'unchanged'
1614
elif (_terminal_size_state == 'unchanged' and
1615
_first_terminal_size != os_size):
1616
_terminal_size_state = 'changed'
1618
# If the OS claims to know how wide the terminal is, and this value has
1619
# ever changed, use that.
1620
if _terminal_size_state == 'changed':
1621
if width is not None and width > 0:
1624
# If COLUMNS is set, use it.
1460
1626
return int(os.environ['COLUMNS'])
1461
1627
except (KeyError, ValueError):
1464
width, height = _terminal_size(None, None)
1466
# Consider invalid values as meaning no width
1630
# Finally, use an unchanged size from the OS, if we have one.
1631
if _terminal_size_state == 'unchanged':
1632
if width is not None and width > 0:
1635
# The width could not be determined.
1472
1639
def _win32_terminal_size(width, height):
1473
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1640
width, height = win32utils.get_console_size(
1641
defaultx=width, defaulty=height)
1474
1642
return width, height
1477
1645
def _ioctl_terminal_size(width, height):
1479
import struct, fcntl, termios
1480
1650
s = struct.pack('HHHH', 0, 0, 0, 0)
1481
1651
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1482
1652
height, width = struct.unpack('HHHH', x)[0:2]
1499
1670
_terminal_size = _ioctl_terminal_size
1502
def _terminal_size_changed(signum, frame):
1503
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1504
width, height = _terminal_size(None, None)
1505
if width is not None:
1506
os.environ['COLUMNS'] = str(width)
1509
_registered_sigwinch = False
1510
def watch_sigwinch():
1511
"""Register for SIGWINCH, once and only once.
1513
Do nothing if the signal module is not available.
1515
global _registered_sigwinch
1516
if not _registered_sigwinch:
1519
if getattr(signal, "SIGWINCH", None) is not None:
1520
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1522
# python doesn't provide signal support, nothing we can do about it
1524
_registered_sigwinch = True
1527
def supports_executable():
1528
return sys.platform != "win32"
1673
def supports_executable(path):
1674
"""Return if filesystem at path supports executable bit.
1676
:param path: Path for which to check the file system
1677
:return: boolean indicating whether executable bit can be stored/relied upon
1679
if sys.platform == 'win32':
1682
fs_type = get_fs_type(path)
1683
except errors.DependencyNotPresent as e:
1684
trace.mutter('Unable to get fs type for %r: %s', path, e)
1686
if fs_type in ('vfat', 'ntfs'):
1687
# filesystems known to not support executable bit
1692
def supports_symlinks(path):
1693
"""Return if the filesystem at path supports the creation of symbolic links.
1696
if not has_symlinks():
1699
fs_type = get_fs_type(path)
1700
except errors.DependencyNotPresent as e:
1701
trace.mutter('Unable to get fs type for %r: %s', path, e)
1703
if fs_type in ('vfat', 'ntfs'):
1704
# filesystems known to not support symlinks
1531
1709
def supports_posix_readonly():
1875
2055
This can be used to sort paths in the same way that walkdirs does.
1877
return (dirname(path) , path)
2057
return (dirname(path), path)
1880
2060
def compare_paths_prefix_order(path_a, path_b):
1881
2061
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1882
2062
key_a = path_prefix_key(path_a)
1883
2063
key_b = path_prefix_key(path_b)
1884
return cmp(key_a, key_b)
2064
return (key_a > key_b) - (key_a < key_b)
1887
2067
_cached_user_encoding = None
1890
def get_user_encoding(use_cache=True):
2070
def get_user_encoding():
1891
2071
"""Find out what the preferred user encoding is.
1893
2073
This is generally the encoding that is used for command line parameters
1894
2074
and file contents. This may be different from the terminal encoding
1895
2075
or the filesystem encoding.
1897
:param use_cache: Enable cache for detected encoding.
1898
(This parameter is turned on by default,
1899
and required only for selftesting)
1901
2077
:return: A string defining the preferred user encoding
1903
2079
global _cached_user_encoding
1904
if _cached_user_encoding is not None and use_cache:
2080
if _cached_user_encoding is not None:
1905
2081
return _cached_user_encoding
1907
if sys.platform == 'darwin':
1908
# python locale.getpreferredencoding() always return
1909
# 'mac-roman' on darwin. That's a lie.
1910
sys.platform = 'posix'
1912
if os.environ.get('LANG', None) is None:
1913
# If LANG is not set, we end up with 'ascii', which is bad
1914
# ('mac-roman' is more than ascii), so we set a default which
1915
# will give us UTF-8 (which appears to work in all cases on
1916
# OSX). Users are still free to override LANG of course, as
1917
# long as it give us something meaningful. This work-around
1918
# *may* not be needed with python 3k and/or OSX 10.5, but will
1919
# work with them too -- vila 20080908
1920
os.environ['LANG'] = 'en_US.UTF-8'
1923
sys.platform = 'darwin'
2083
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2084
# Use the existing locale settings and call nl_langinfo directly
2085
# rather than going through getpreferredencoding. This avoids
2086
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2087
# possibility of the setlocale call throwing an error.
2088
user_encoding = locale.nl_langinfo(locale.CODESET)
2090
# GZ 2011-12-19: On windows could call GetACP directly instead.
2091
user_encoding = locale.getpreferredencoding(False)
1928
user_encoding = locale.getpreferredencoding()
1929
except locale.Error, e:
1930
sys.stderr.write('bzr: warning: %s\n'
1931
' Could not determine what text encoding to use.\n'
1932
' This error usually means your Python interpreter\n'
1933
' doesn\'t support the locale set by $LANG (%s)\n'
1934
" Continuing with ascii encoding.\n"
1935
% (e, os.environ.get('LANG')))
1936
user_encoding = 'ascii'
1938
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1939
# treat that as ASCII, and not support printing unicode characters to the
1942
# For python scripts run under vim, we get '', so also treat that as ASCII
1943
if user_encoding in (None, 'cp0', ''):
1944
user_encoding = 'ascii'
1948
codecs.lookup(user_encoding)
1950
sys.stderr.write('bzr: warning:'
2094
user_encoding = codecs.lookup(user_encoding).name
2096
if user_encoding not in ("", "cp0"):
2097
sys.stderr.write('brz: warning:'
1951
2098
' unknown encoding %s.'
1952
2099
' Continuing with ascii encoding.\n'
1953
2100
% user_encoding
1955
user_encoding = 'ascii'
1958
_cached_user_encoding = user_encoding
2102
user_encoding = 'ascii'
2104
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2105
if user_encoding == 'ascii':
2106
if sys.platform == 'darwin':
2107
# OSX is special-cased in Python to have a UTF-8 filesystem
2108
# encoding and previously had LANG set here if not present.
2109
user_encoding = 'utf-8'
2110
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2111
# for some other posix platforms as well.
2113
_cached_user_encoding = user_encoding
1960
2114
return user_encoding
2117
def get_diff_header_encoding():
2118
return get_terminal_encoding()
1963
2121
def get_host_name():
1964
2122
"""Return the current unicode host name.
1980
2139
# data at once.
1981
2140
MAX_SOCKET_CHUNK = 64 * 1024
2142
_end_of_stream_errors = [errno.ECONNRESET, errno.EPIPE, errno.EINVAL]
2143
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2144
_eno = getattr(errno, _eno, None)
2145
if _eno is not None:
2146
_end_of_stream_errors.append(_eno)
1983
2150
def read_bytes_from_socket(sock, report_activity=None,
1984
max_read_size=MAX_SOCKET_CHUNK):
2151
max_read_size=MAX_SOCKET_CHUNK):
1985
2152
"""Read up to max_read_size of bytes from sock and notify of progress.
1987
2154
Translates "Connection reset by peer" into file-like EOF (return an
1988
2155
empty string rather than raise an error), and repeats the recv if
1989
2156
interrupted by a signal.
1993
bytes = sock.recv(max_read_size)
1994
except socket.error, e:
2160
data = sock.recv(max_read_size)
2161
except socket.error as e:
1995
2162
eno = e.args[0]
1996
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2163
if eno in _end_of_stream_errors:
1997
2164
# The connection was closed by the other side. Callers expect
1998
2165
# an empty string to signal end-of-stream.
2000
2167
elif eno == errno.EINTR:
2001
2168
# Retry the interrupted recv.
2005
2172
if report_activity is not None:
2006
report_activity(len(bytes), 'read')
2173
report_activity(len(data), 'read')
2010
2177
def recv_all(socket, count):
2018
2185
This isn't optimized and is intended mostly for use in testing.
2021
2188
while len(b) < count:
2022
2189
new = read_bytes_from_socket(socket, None, count - len(b))
2029
2196
def send_all(sock, bytes, report_activity=None):
2030
2197
"""Send all bytes on a socket.
2032
2199
Breaks large blocks in smaller chunks to avoid buffering limitations on
2033
2200
some platforms, and catches EINTR which may be thrown if the send is
2034
2201
interrupted by a signal.
2036
2203
This is preferred to socket.sendall(), because it avoids portability bugs
2037
2204
and provides activity reporting.
2039
2206
:param report_activity: Call this as bytes are read, see
2040
2207
Transport._report_activity
2043
2210
byte_count = len(bytes)
2211
view = memoryview(bytes)
2044
2212
while sent_total < byte_count:
2046
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2047
except socket.error, e:
2214
sent = sock.send(view[sent_total:sent_total + MAX_SOCKET_CHUNK])
2215
except (socket.error, IOError) as e:
2216
if e.args[0] in _end_of_stream_errors:
2217
raise errors.ConnectionReset(
2218
"Error trying to write to socket", e)
2048
2219
if e.args[0] != errno.EINTR:
2223
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2051
2225
sent_total += sent
2052
report_activity(sent, 'write')
2226
if report_activity is not None:
2227
report_activity(sent, 'write')
2230
def connect_socket(address):
2231
# Slight variation of the socket.create_connection() function (provided by
2232
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2233
# provide it for previous python versions. Also, we don't use the timeout
2234
# parameter (provided by the python implementation) so we don't implement
2236
err = socket.error('getaddrinfo returns an empty list')
2237
host, port = address
2238
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2239
af, socktype, proto, canonname, sa = res
2242
sock = socket.socket(af, socktype, proto)
2246
except socket.error as e:
2248
# 'err' is now the most recent error
2249
if sock is not None:
2055
2254
def dereference_path(path):
2083
2282
If and when pkg_resources becomes a standard library, this routine
2084
2283
can delegate to it.
2086
# Check package name is within bzrlib
2087
if package == "bzrlib":
2285
# Check package name is within breezy
2286
if package == "breezy":
2088
2287
resource_relpath = resource_name
2089
elif package.startswith("bzrlib."):
2090
package = package[len("bzrlib."):].replace('.', os.sep)
2288
elif package.startswith("breezy."):
2289
package = package[len("breezy."):].replace('.', os.sep)
2091
2290
resource_relpath = pathjoin(package, resource_name)
2093
raise errors.BzrError('resource package %s not in bzrlib' % package)
2292
raise errors.BzrError('resource package %s not in breezy' % package)
2095
2294
# Map the resource to a file and read its contents
2096
base = dirname(bzrlib.__file__)
2295
base = dirname(breezy.__file__)
2097
2296
if getattr(sys, 'frozen', None): # bzr.exe
2098
2297
base = abspath(pathjoin(base, '..', '..'))
2099
filename = pathjoin(base, resource_relpath)
2100
return open(filename, 'rU').read()
2298
with open(pathjoin(base, resource_relpath), "rt") as f:
2103
2302
def file_kind_from_stat_mode_thunk(mode):
2104
2303
global file_kind_from_stat_mode
2105
2304
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2107
from bzrlib._readdir_pyx import UTF8DirReader
2306
from ._readdir_pyx import UTF8DirReader
2108
2307
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2109
except ImportError, e:
2110
2309
# This is one time where we won't warn that an extension failed to
2111
2310
# load. The extension is never available on Windows anyway.
2112
from bzrlib._readdir_py import (
2311
from ._readdir_py import (
2113
2312
_kind_from_mode as file_kind_from_stat_mode
2115
2314
return file_kind_from_stat_mode(mode)
2116
2317
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2119
def file_kind(f, _lstat=os.lstat):
2320
def file_stat(f, _lstat=os.lstat):
2121
return file_kind_from_stat_mode(_lstat(f).st_mode)
2324
except OSError as e:
2123
2325
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2124
2326
raise errors.NoSuchFile(f)
2330
def file_kind(f, _lstat=os.lstat):
2331
stat_value = file_stat(f, _lstat)
2332
return file_kind_from_stat_mode(stat_value.st_mode)
2128
2335
def until_no_eintr(f, *a, **kw):
2129
2336
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2131
2338
WARNING: you must be certain that it is safe to retry the call repeatedly
2132
2339
if EINTR does occur. This is typically only true for low-level operations
2133
2340
like os.read. If in any doubt, don't use this.
2135
2342
Keep in mind that this is not a complete solution to EINTR. There is
2136
2343
probably code in the Python standard library and other dependencies that
2137
2344
may encounter EINTR if a signal arrives (and there is signal handler for
2138
that signal). So this function can reduce the impact for IO that bzrlib
2345
that signal). So this function can reduce the impact for IO that breezy
2139
2346
directly controls, but it is not a complete solution.
2141
2348
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2144
2351
return f(*a, **kw)
2145
except (IOError, OSError), e:
2352
except (IOError, OSError) as e:
2146
2353
if e.errno == errno.EINTR:
2151
def re_compile_checked(re_string, flags=0, where=""):
2152
"""Return a compiled re, or raise a sensible error.
2154
This should only be used when compiling user-supplied REs.
2156
:param re_string: Text form of regular expression.
2157
:param flags: eg re.IGNORECASE
2158
:param where: Message explaining to the user the context where
2159
it occurred, eg 'log search filter'.
2161
# from https://bugs.launchpad.net/bzr/+bug/251352
2163
re_obj = re.compile(re_string, flags)
2168
where = ' in ' + where
2169
# despite the name 'error' is a type
2170
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
2171
% (where, re_string, e))
2174
2358
if sys.platform == "win32":
2177
2361
return msvcrt.getch()
2182
2366
fd = sys.stdin.fileno()
2183
2367
settings = termios.tcgetattr(fd)
2188
2372
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2192
if sys.platform == 'linux2':
2375
if sys.platform.startswith('linux'):
2193
2376
def _local_concurrency():
2195
prefix = 'processor'
2196
for line in file('/proc/cpuinfo', 'rb'):
2197
if line.startswith(prefix):
2198
concurrency = int(line[line.find(':')+1:]) + 1
2378
return os.sysconf('SC_NPROCESSORS_ONLN')
2379
except (ValueError, OSError, AttributeError):
2200
2381
elif sys.platform == 'darwin':
2201
2382
def _local_concurrency():
2202
2383
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2203
2384
stdout=subprocess.PIPE).communicate()[0]
2204
elif sys.platform[0:7] == 'freebsd':
2385
elif "bsd" in sys.platform:
2205
2386
def _local_concurrency():
2206
2387
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2207
2388
stdout=subprocess.PIPE).communicate()[0]
2208
2389
elif sys.platform == 'sunos5':
2209
2390
def _local_concurrency():
2210
return subprocess.Popen(['psrinfo', '-p',],
2391
return subprocess.Popen(['psrinfo', '-p', ],
2211
2392
stdout=subprocess.PIPE).communicate()[0]
2212
2393
elif sys.platform == "win32":
2213
2394
def _local_concurrency():
2305
2493
open_file = open
2308
def getuser_unicode():
2309
"""Return the username as unicode.
2312
user_encoding = get_user_encoding()
2313
username = getpass.getuser().decode(user_encoding)
2314
except UnicodeDecodeError:
2315
raise errors.BzrError("Can't decode username as %s." % \
2496
def available_backup_name(base, exists):
2497
"""Find a non-existing backup file name.
2499
This will *not* create anything, this only return a 'free' entry. This
2500
should be used for checking names in a directory below a locked
2501
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2502
Leap) and generally discouraged.
2504
:param base: The base name.
2506
:param exists: A callable returning True if the path parameter exists.
2509
name = "%s.~%d~" % (base, counter)
2512
name = "%s.~%d~" % (base, counter)
2516
def set_fd_cloexec(fd):
2517
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2518
support for this is not available.
2522
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2523
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2524
except (ImportError, AttributeError):
2525
# Either the fcntl module or specific constants are not present
2529
def find_executable_on_path(name):
2530
"""Finds an executable on the PATH.
2532
On Windows, this will try to append each extension in the PATHEXT
2533
environment variable to the name, if it cannot be found with the name
2536
:param name: The base name of the executable.
2537
:return: The path to the executable found or None.
2539
if sys.platform == 'win32':
2540
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2541
exts = [ext.lower() for ext in exts]
2542
base, ext = os.path.splitext(name)
2544
if ext.lower() not in exts:
2550
path = os.environ.get('PATH')
2551
if path is not None:
2552
path = path.split(os.pathsep)
2555
f = os.path.join(d, name) + ext
2556
if os.access(f, os.X_OK):
2558
if sys.platform == 'win32':
2559
app_path = win32utils.get_app_path(name)
2560
if app_path != name:
2565
def _posix_is_local_pid_dead(pid):
2566
"""True if pid doesn't correspond to live process on this machine"""
2568
# Special meaning of unix kill: just check if it's there.
2570
except OSError as e:
2571
if e.errno == errno.ESRCH:
2572
# On this machine, and really not found: as sure as we can be
2575
elif e.errno == errno.EPERM:
2576
# exists, though not ours
2579
trace.mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2580
# Don't really know.
2583
# Exists and our process: not dead.
2587
if sys.platform == "win32":
2588
is_local_pid_dead = win32utils.is_local_pid_dead
2590
is_local_pid_dead = _posix_is_local_pid_dead
2592
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2593
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2594
if getattr(errno, name, None) is not None]
2597
def fdatasync(fileno):
2598
"""Flush file contents to disk if possible.
2600
:param fileno: Integer OS file handle.
2601
:raises TransportNotPossible: If flushing to disk is not possible.
2603
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2607
except IOError as e:
2608
# See bug #1075108, on some platforms fdatasync exists, but can
2609
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2610
# and reduce the chance of corruption-on-powerloss situations. It
2611
# is not a mandatory call, so it is ok to suppress failures.
2612
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2613
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2617
def ensure_empty_directory_exists(path, exception_class):
2618
"""Make sure a local directory exists and is empty.
2620
If it does not exist, it is created. If it exists and is not empty, an
2621
instance of exception_class is raised.
2625
except OSError as e:
2626
if e.errno != errno.EEXIST:
2628
if os.listdir(path) != []:
2629
raise exception_class(path)
2632
def is_environment_error(evalue):
2633
"""True if exception instance is due to a process environment issue
2635
This includes OSError and IOError, but also other errors that come from
2636
the operating system or core libraries but are not subclasses of those.
2638
if isinstance(evalue, (EnvironmentError, select.error)):
2640
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
2645
def read_mtab(path):
2646
"""Read an fstab-style file and extract mountpoint+filesystem information.
2648
:param path: Path to read from
2649
:yield: Tuples with mountpoints (as bytestrings) and filesystem names
2651
with open(path, 'rb') as f:
2653
if line.startswith(b'#'):
2658
yield cols[1], cols[2].decode('ascii', 'replace')
2661
MTAB_PATH = '/etc/mtab'
2663
class FilesystemFinder(object):
2664
"""Find the filesystem for a particular path."""
2666
def __init__(self, mountpoints):
2669
self._mountpoints = sorted(mountpoints, key=key, reverse=True)
2673
"""Create a FilesystemFinder from an mtab-style file.
2675
Note that this will silenty ignore mtab if it doesn't exist or can not
2678
# TODO(jelmer): Use inotify to be notified when /etc/mtab changes and
2679
# we need to re-read it.
2681
return cls(read_mtab(MTAB_PATH))
2682
except EnvironmentError as e:
2683
trace.mutter('Unable to read mtab: %s', e)
2686
def find(self, path):
2687
"""Find the filesystem used by a particular path.
2689
:param path: Path to find (bytestring or text type)
2690
:return: Filesystem name (as text type) or None, if the filesystem is
2693
for mountpoint, filesystem in self._mountpoints:
2694
if is_inside(mountpoint, path):
2699
_FILESYSTEM_FINDER = None
2702
def get_fs_type(path):
2703
"""Return the filesystem type for the partition a path is in.
2705
:param path: Path to search filesystem type for
2706
:return: A FS type, as string. E.g. "ext2"
2708
global _FILESYSTEM_FINDER
2709
if _FILESYSTEM_FINDER is None:
2710
_FILESYSTEM_FINDER = FilesystemFinder.from_mtab()
2712
if not isinstance(path, bytes):
2713
path = path.encode(_fs_enc)
2715
return _FILESYSTEM_FINDER.find(path)
2719
perf_counter = time.perf_counter
2721
perf_counter = time.clock