14
14
# along with this program; if not, write to the Free Software
15
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from __future__ import absolute_import
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from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
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from bzrlib.lazy_import import lazy_import
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from .lazy_import import lazy_import
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lazy_import(globals(), """
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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# We need to import both shutil and rmtree as we export the later on posix
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# and need the former on windows
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from shutil import rmtree
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# We need to import both tempfile and mkdtemp as we export the later on posix
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# and need the former on windows
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from tempfile import (
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from tempfile import mkdtemp
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from breezy.i18n import gettext
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from bzrlib.symbol_versioning import (
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# sha and md5 modules are deprecated in python2.6 but hashlib is available as
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if sys.version_info < (2, 5):
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import md5 as _mod_md5
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import sha as _mod_sha
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from bzrlib import symbol_versioning
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# Cross platform wall-clock time functionality with decent resolution.
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# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
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# only has a resolution of ~15ms. Note that ``time.clock()`` is not
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# synchronized with ``time.time()``, this is only meant to be used to find
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# delta times by subtracting from another call to this function.
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timer_func = time.time
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if sys.platform == 'win32':
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timer_func = time.clock
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# On win32, O_BINARY is used to indicate the file should
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74
# be opened in binary mode, rather than text mode.
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O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
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class UnsupportedTimezoneFormat(errors.BzrError):
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_fmt = ('Unsupported timezone format "%(timezone)s", '
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'options are "utc", "original", "local".')
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def __init__(self, timezone):
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self.timezone = timezone
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93
def get_unicode_argv():
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user_encoding = get_user_encoding()
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return [a.decode(user_encoding) for a in sys.argv[1:]]
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except UnicodeDecodeError:
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raise errors.BzrError(("Parameter '%r' is unsupported by the current "
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raise errors.BzrError(gettext("Parameter {0!r} encoding is unsupported by {1} "
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"application locale.").format(a, user_encoding))
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def make_readonly(filename):
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"""Make a filename read-only."""
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
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chmod_if_possible(filename, mod)
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def make_writable(filename):
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mod = os.lstat(filename).st_mode
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if not stat.S_ISLNK(mod):
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os.chmod(filename, mod)
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chmod_if_possible(filename, mod)
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def chmod_if_possible(filename, mode):
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# Set file mode if that can be safely done.
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# Sometimes even on unix the filesystem won't allow it - see
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# https://bugs.launchpad.net/bzr/+bug/606537
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# It is probably faster to just do the chmod, rather than
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# doing a stat, and then trying to compare
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os.chmod(filename, mode)
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except (IOError, OSError) as e:
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# Permission/access denied seems to commonly happen on smbfs; there's
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# probably no point warning about it.
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# <https://bugs.launchpad.net/bzr/+bug/606537>
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if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
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trace.mutter("ignore error on chmod of %r: %r" % (
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def minimum_path_selection(paths):
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file_existed = False
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rename_func(new, tmp_name)
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except (errors.NoSuchFile,), e:
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except (errors.NoSuchFile,):
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# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
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# function raises an IOError with errno is None when a rename fails.
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# This then gets caught here.
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if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
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except Exception as e:
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if (getattr(e, 'errno', None) is None
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or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
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or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
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file_existed = True
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# This may throw an exception, in which case success will
257
rename_func(old, new)
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except (IOError, OSError), e:
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# source and target may be aliases of each other (e.g. on a
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# case-insensitive filesystem), so we may have accidentally renamed
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# source by when we tried to rename target
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failure_exc = sys.exc_info()
264
if (file_existed and e.errno in (None, errno.ENOENT)
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# 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
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# 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
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
285
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
286
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def _posix_abspath(path):
287
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# jam 20060426 rather than encoding to fsencoding
288
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# copy posixpath.abspath, but use os.getcwdu instead
289
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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
542
On my standard US Windows XP, the preferred encoding is
473
543
cp1252, but the console is cp437
545
:param trace: If True trace the selected encoding via mutter().
475
from bzrlib.trace import mutter
547
from .trace import mutter
476
548
output_encoding = getattr(sys.stdout, 'encoding', None)
477
549
if not output_encoding:
478
550
input_encoding = getattr(sys.stdin, 'encoding', None)
479
551
if not input_encoding:
480
552
output_encoding = get_user_encoding()
481
mutter('encoding stdout as osutils.get_user_encoding() %r',
554
mutter('encoding stdout as osutils.get_user_encoding() %r',
484
557
output_encoding = input_encoding
485
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
559
mutter('encoding stdout as sys.stdin encoding %r',
487
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
563
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
488
564
if output_encoding == 'cp0':
489
565
# invalid encoding (cp0 means 'no codepage' on Windows)
490
566
output_encoding = get_user_encoding()
491
mutter('cp0 is invalid encoding.'
492
' encoding stdout as osutils.get_user_encoding() %r',
568
mutter('cp0 is invalid encoding.'
569
' encoding stdout as osutils.get_user_encoding() %r',
496
573
codecs.lookup(output_encoding)
497
574
except LookupError:
498
sys.stderr.write('bzr: warning:'
575
sys.stderr.write('brz: warning:'
499
576
' unknown terminal encoding %s.\n'
500
577
' Using encoding %s instead.\n'
501
578
% (output_encoding, get_user_encoding())
503
580
output_encoding = get_user_encoding()
505
582
return output_encoding
879
975
return '%d hours, %d minute%s %s' % (hours, minutes,
880
976
plural_minutes, direction)
883
980
"""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
981
return os.fstat(f.fileno())[stat.ST_SIZE]
984
# Alias os.urandom to support platforms (which?) without /dev/urandom and
985
# override if it doesn't work. Avoid checking on windows where there is
986
# significant initialisation cost that can be avoided for some bzr calls.
988
rand_bytes = os.urandom
990
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):
993
except NotImplementedError:
900
994
# not well seeded, but better than nothing
901
995
def rand_bytes(n):
918
1014
for raw_byte in rand_bytes(num):
919
s += ALNUM[ord(raw_byte) % 36]
1016
s += ALNUM[ord(raw_byte) % 36]
1018
s += ALNUM[raw_byte % 36]
923
## TODO: We could later have path objects that remember their list
924
## decomposition (might be too tricksy though.)
1022
# TODO: We could later have path objects that remember their list
1023
# decomposition (might be too tricksy though.)
926
1025
def splitpath(p):
927
1026
"""Turn string into list of parts."""
928
# split on either delimiter because people might use either on
930
ps = re.split(r'[\\/]', p)
1027
use_bytes = isinstance(p, bytes)
1028
if os.path.sep == '\\':
1029
# split on either delimiter because people might use either on
1032
ps = re.split(b'[\\\\/]', p)
1034
ps = re.split(r'[\\/]', p)
1043
current_empty_dir = (b'.', b'')
1046
current_empty_dir = ('.', '')
935
raise errors.BzrError("sorry, %r not allowed in path" % f)
936
elif (f == '.') or (f == ''):
1051
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
1052
elif f in current_empty_dir:
994
1109
def report_extension_load_failures():
995
1110
if not _extension_load_failures:
997
from bzrlib.config import GlobalConfig
998
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1112
if config.GlobalConfig().suppress_warning('missing_extensions'):
1000
1114
# the warnings framework should by default show this only once
1001
from bzrlib.trace import warning
1115
from .trace import warning
1003
"bzr: warning: some compiled extensions could not be loaded; "
1004
"see <https://answers.launchpad.net/bzr/+faq/703>")
1117
"brz: warning: some compiled extensions could not be loaded; "
1118
"see ``brz help missing-extensions``")
1005
1119
# we no longer show the specific missing extensions here, because it makes
1006
1120
# the message too long and scary - see
1007
1121
# https://bugs.launchpad.net/bzr/+bug/430529
1011
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1012
except ImportError, e:
1125
from ._chunks_to_lines_pyx import chunks_to_lines
1126
except ImportError as e:
1013
1127
failed_to_load_extension(e)
1014
from bzrlib._chunks_to_lines_py import chunks_to_lines
1128
from ._chunks_to_lines_py import chunks_to_lines
1017
1131
def split_lines(s):
1018
1132
"""Split s into lines, but without removing the newline characters."""
1019
1133
# Trivially convert a fulltext into a 'chunked' representation, and let
1020
1134
# chunks_to_lines do the heavy lifting.
1021
if isinstance(s, str):
1135
if isinstance(s, bytes):
1022
1136
# chunks_to_lines only supports 8-bit strings
1023
1137
return chunks_to_lines([s])
1285
1418
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):
1421
def safe_revision_id(unicode_or_utf8_string):
1294
1422
"""Revision ids should now be utf8, but at one point they were unicode.
1296
1424
: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
1426
:return: None or a utf8 revision id.
1301
1428
if (unicode_or_utf8_string is None
1302
or unicode_or_utf8_string.__class__ == str):
1429
or unicode_or_utf8_string.__class__ == bytes):
1303
1430
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):
1431
raise TypeError('Unicode revision ids are no longer supported. '
1432
'Revision id generators should be creating utf8 revision '
1436
def safe_file_id(unicode_or_utf8_string):
1315
1437
"""File ids should now be utf8, but at one point they were unicode.
1317
1439
This is the same as safe_utf8, except it uses the cached encode functions
1425
1555
None is returned if the width can't established precisely.
1428
- if BZR_COLUMNS is set, returns its value
1558
- if BRZ_COLUMNS is set, returns its value
1429
1559
- if there is no controlling terminal, returns None
1560
- query the OS, if the queried size has changed since the last query,
1430
1562
- if COLUMNS is set, returns its value,
1563
- if the OS has a value (even though it's never changed), return its value.
1432
1565
From there, we need to query the OS to get the size of the controlling
1568
On Unices we query the OS by:
1436
1569
- get termios.TIOCGWINSZ
1437
1570
- if an error occurs or a negative value is obtained, returns None
1572
On Windows we query the OS by:
1441
1573
- win32utils.get_console_size() decides,
1442
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
1445
# If BZR_COLUMNS is set, take it, user is always right
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
1447
return int(os.environ['BZR_COLUMNS'])
1592
width = int(os.environ['BRZ_COLUMNS'])
1448
1593
except (KeyError, ValueError):
1595
if width is not None:
1451
1601
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.
1602
if isatty is None or not isatty():
1603
# 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))
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.
1460
1624
return int(os.environ['COLUMNS'])
1461
1625
except (KeyError, ValueError):
1464
width, height = _terminal_size(None, None)
1466
# Consider invalid values as meaning no width
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.
1472
1637
def _win32_terminal_size(width, height):
1473
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1638
width, height = win32utils.get_console_size(
1639
defaultx=width, defaulty=height)
1474
1640
return width, height
1477
1643
def _ioctl_terminal_size(width, height):
1479
import struct, fcntl, termios
1480
1648
s = struct.pack('HHHH', 0, 0, 0, 0)
1481
1649
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1482
1650
height, width = struct.unpack('HHHH', x)[0:2]
1499
1668
_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"
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
1531
1707
def supports_posix_readonly():
1875
2053
This can be used to sort paths in the same way that walkdirs does.
1877
return (dirname(path) , path)
2055
return (dirname(path), path)
1880
2058
def compare_paths_prefix_order(path_a, path_b):
1881
2059
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1882
2060
key_a = path_prefix_key(path_a)
1883
2061
key_b = path_prefix_key(path_b)
1884
return cmp(key_a, key_b)
2062
return (key_a > key_b) - (key_a < key_b)
1887
2065
_cached_user_encoding = None
1890
def get_user_encoding(use_cache=True):
2068
def get_user_encoding():
1891
2069
"""Find out what the preferred user encoding is.
1893
2071
This is generally the encoding that is used for command line parameters
1894
2072
and file contents. This may be different from the terminal encoding
1895
2073
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
2075
:return: A string defining the preferred user encoding
1903
2077
global _cached_user_encoding
1904
if _cached_user_encoding is not None and use_cache:
2078
if _cached_user_encoding is not None:
1905
2079
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'
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)
2088
# GZ 2011-12-19: On windows could call GetACP directly instead.
2089
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:'
2092
user_encoding = codecs.lookup(user_encoding).name
2094
if user_encoding not in ("", "cp0"):
2095
sys.stderr.write('brz: warning:'
1951
2096
' unknown encoding %s.'
1952
2097
' Continuing with ascii encoding.\n'
1953
2098
% user_encoding
1955
user_encoding = 'ascii'
1958
_cached_user_encoding = 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
1960
2112
return user_encoding
2115
def get_diff_header_encoding():
2116
return get_terminal_encoding()
1963
2119
def get_host_name():
1964
2120
"""Return the current unicode host name.
1980
2137
# data at once.
1981
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)
1983
2148
def read_bytes_from_socket(sock, report_activity=None,
1984
max_read_size=MAX_SOCKET_CHUNK):
2149
max_read_size=MAX_SOCKET_CHUNK):
1985
2150
"""Read up to max_read_size of bytes from sock and notify of progress.
1987
2152
Translates "Connection reset by peer" into file-like EOF (return an
1988
2153
empty string rather than raise an error), and repeats the recv if
1989
2154
interrupted by a signal.
1993
bytes = sock.recv(max_read_size)
1994
except socket.error, e:
2158
data = sock.recv(max_read_size)
2159
except socket.error as e:
1995
2160
eno = e.args[0]
1996
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2161
if eno in _end_of_stream_errors:
1997
2162
# The connection was closed by the other side. Callers expect
1998
2163
# an empty string to signal end-of-stream.
2000
2165
elif eno == errno.EINTR:
2001
2166
# Retry the interrupted recv.
2005
2170
if report_activity is not None:
2006
report_activity(len(bytes), 'read')
2171
report_activity(len(data), 'read')
2010
2175
def recv_all(socket, count):
2018
2183
This isn't optimized and is intended mostly for use in testing.
2021
2186
while len(b) < count:
2022
2187
new = read_bytes_from_socket(socket, None, count - len(b))
2029
2194
def send_all(sock, bytes, report_activity=None):
2030
2195
"""Send all bytes on a socket.
2032
2197
Breaks large blocks in smaller chunks to avoid buffering limitations on
2033
2198
some platforms, and catches EINTR which may be thrown if the send is
2034
2199
interrupted by a signal.
2036
2201
This is preferred to socket.sendall(), because it avoids portability bugs
2037
2202
and provides activity reporting.
2039
2204
:param report_activity: Call this as bytes are read, see
2040
2205
Transport._report_activity
2043
2208
byte_count = len(bytes)
2209
view = memoryview(bytes)
2044
2210
while sent_total < byte_count:
2046
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2047
except socket.error, e:
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)
2048
2217
if e.args[0] != errno.EINTR:
2221
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2051
2223
sent_total += sent
2052
report_activity(sent, 'write')
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:
2055
2252
def dereference_path(path):
2083
2280
If and when pkg_resources becomes a standard library, this routine
2084
2281
can delegate to it.
2086
# Check package name is within bzrlib
2087
if package == "bzrlib":
2283
# Check package name is within breezy
2284
if package == "breezy":
2088
2285
resource_relpath = resource_name
2089
elif package.startswith("bzrlib."):
2090
package = package[len("bzrlib."):].replace('.', os.sep)
2286
elif package.startswith("breezy."):
2287
package = package[len("breezy."):].replace('.', os.sep)
2091
2288
resource_relpath = pathjoin(package, resource_name)
2093
raise errors.BzrError('resource package %s not in bzrlib' % package)
2290
raise errors.BzrError('resource package %s not in breezy' % package)
2095
2292
# Map the resource to a file and read its contents
2096
base = dirname(bzrlib.__file__)
2293
base = dirname(breezy.__file__)
2097
2294
if getattr(sys, 'frozen', None): # bzr.exe
2098
2295
base = abspath(pathjoin(base, '..', '..'))
2099
filename = pathjoin(base, resource_relpath)
2100
return open(filename, 'rU').read()
2296
with open(pathjoin(base, resource_relpath), "rt") as f:
2103
2300
def file_kind_from_stat_mode_thunk(mode):
2104
2301
global file_kind_from_stat_mode
2105
2302
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2107
from bzrlib._readdir_pyx import UTF8DirReader
2304
from ._readdir_pyx import UTF8DirReader
2108
2305
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2109
except ImportError, e:
2110
2307
# This is one time where we won't warn that an extension failed to
2111
2308
# load. The extension is never available on Windows anyway.
2112
from bzrlib._readdir_py import (
2309
from ._readdir_py import (
2113
2310
_kind_from_mode as file_kind_from_stat_mode
2115
2312
return file_kind_from_stat_mode(mode)
2116
2315
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2119
def file_kind(f, _lstat=os.lstat):
2318
def file_stat(f, _lstat=os.lstat):
2121
return file_kind_from_stat_mode(_lstat(f).st_mode)
2322
except OSError as e:
2123
2323
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2124
2324
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)
2128
2333
def until_no_eintr(f, *a, **kw):
2129
2334
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2131
2336
WARNING: you must be certain that it is safe to retry the call repeatedly
2132
2337
if EINTR does occur. This is typically only true for low-level operations
2133
2338
like os.read. If in any doubt, don't use this.
2135
2340
Keep in mind that this is not a complete solution to EINTR. There is
2136
2341
probably code in the Python standard library and other dependencies that
2137
2342
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
2343
that signal). So this function can reduce the impact for IO that breezy
2139
2344
directly controls, but it is not a complete solution.
2141
2346
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2144
2349
return f(*a, **kw)
2145
except (IOError, OSError), e:
2350
except (IOError, OSError) as e:
2146
2351
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
2356
if sys.platform == "win32":
2177
2359
return msvcrt.getch()
2182
2364
fd = sys.stdin.fileno()
2183
2365
settings = termios.tcgetattr(fd)
2188
2370
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2192
if sys.platform == 'linux2':
2373
if sys.platform.startswith('linux'):
2193
2374
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
2376
return os.sysconf('SC_NPROCESSORS_ONLN')
2377
except (ValueError, OSError, AttributeError):
2200
2379
elif sys.platform == 'darwin':
2201
2380
def _local_concurrency():
2202
2381
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2203
2382
stdout=subprocess.PIPE).communicate()[0]
2204
elif sys.platform[0:7] == 'freebsd':
2383
elif "bsd" in sys.platform:
2205
2384
def _local_concurrency():
2206
2385
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2207
2386
stdout=subprocess.PIPE).communicate()[0]
2208
2387
elif sys.platform == 'sunos5':
2209
2388
def _local_concurrency():
2210
return subprocess.Popen(['psrinfo', '-p',],
2389
return subprocess.Popen(['psrinfo', '-p', ],
2211
2390
stdout=subprocess.PIPE).communicate()[0]
2212
2391
elif sys.platform == "win32":
2213
2392
def _local_concurrency():
2305
2491
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." % \
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
added
removed
breezy/osutils.py
