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
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from datetime import datetime
29
from ntpath import (abspath as _nt_abspath,
31
normpath as _nt_normpath,
32
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
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
43
from tempfile import (
44
from tempfile import mkdtemp
52
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
63
if sys.version_info < (2, 5):
64
import md5 as _mod_md5
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import sha as _mod_sha
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from bzrlib import symbol_versioning
79
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# Cross platform wall-clock time functionality with decent resolution.
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O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
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class UnsupportedTimezoneFormat(errors.BzrError):
95
_fmt = ('Unsupported timezone format "%(timezone)s", '
96
'options are "utc", "original", "local".')
98
def __init__(self, timezone):
99
self.timezone = timezone
99
102
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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108
except UnicodeDecodeError:
104
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} "
110
"application locale.").format(a, user_encoding))
108
113
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
118
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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
133
# 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
138
# probably no point warning about it.
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# <https://bugs.launchpad.net/bzr/+bug/606537>
140
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
234
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rename_func(new, tmp_name)
235
except (errors.NoSuchFile,), e:
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except (errors.NoSuchFile,) as e:
238
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# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
239
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# function raises an IOError with errno is None when a rename fails.
240
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# This then gets caught here.
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if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
270
except Exception as e:
244
271
if (getattr(e, 'errno', None) is None
245
272
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
248
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file_existed = True
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# This may throw an exception, in which case success will
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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()
263
if (file_existed and e.errno in (None, errno.ENOENT)
264
and old.lower() == new.lower()):
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# source and target are the same file on a case-insensitive
266
# filesystem, so we don't generate an exception
279
# This may throw an exception, in which case success will
281
rename_func(old, new)
283
except (IOError, OSError) as e:
284
# source and target may be aliases of each other (e.g. on a
285
# case-insensitive filesystem), so we may have accidentally renamed
286
# source by when we tried to rename target
287
if (file_existed and e.errno in (None, errno.ENOENT)
288
and old.lower() == new.lower()):
289
# source and target are the same file on a case-insensitive
290
# filesystem, so we don't generate an exception
270
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# If the file used to exist, rename it back into place
273
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unlink_func(tmp_name)
275
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rename_func(tmp_name, new)
276
if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
280
304
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
281
305
# choke on a Unicode string containing a relative path if
282
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
285
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def _posix_abspath(path):
286
309
# jam 20060426 rather than encoding to fsencoding
287
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# copy posixpath.abspath, but use os.getcwdu instead
288
311
if not posixpath.isabs(path):
289
312
path = posixpath.join(getcwd(), path)
290
return posixpath.normpath(path)
313
return _posix_normpath(path)
293
316
def _posix_realpath(path):
294
317
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
320
def _posix_normpath(path):
321
path = posixpath.normpath(path)
322
# Bug 861008: posixpath.normpath() returns a path normalized according to
323
# the POSIX standard, which stipulates (for compatibility reasons) that two
324
# leading slashes must not be simplified to one, and only if there are 3 or
325
# more should they be simplified as one. So we treat the leading 2 slashes
326
# as a special case here by simply removing the first slash, as we consider
327
# that breaking POSIX compatibility for this obscure feature is acceptable.
328
# This is not a paranoid precaution, as we notably get paths like this when
329
# the repo is hosted at the root of the filesystem, i.e. in "/".
330
if path.startswith('//'):
335
def _posix_path_from_environ(key):
336
"""Get unicode path from `key` in environment or None if not present
338
Note that posix systems use arbitrary byte strings for filesystem objects,
339
so a path that raises BadFilenameEncoding here may still be accessible.
341
val = os.environ.get(key, None)
342
if PY3 or val is None:
345
return val.decode(_fs_enc)
346
except UnicodeDecodeError:
347
# GZ 2011-12-12:Ideally want to include `key` in the exception message
348
raise errors.BadFilenameEncoding(val, _fs_enc)
351
def _posix_get_home_dir():
352
"""Get the home directory of the current user as a unicode path"""
353
path = posixpath.expanduser("~")
355
return path.decode(_fs_enc)
356
except AttributeError:
358
except UnicodeDecodeError:
359
raise errors.BadFilenameEncoding(path, _fs_enc)
362
def _posix_getuser_unicode():
363
"""Get username from environment or password database as unicode"""
364
name = getpass.getuser()
367
user_encoding = get_user_encoding()
369
return name.decode(user_encoding)
370
except UnicodeDecodeError:
371
raise errors.BzrError("Encoding of username %r is unsupported by %s "
372
"application locale." % (name, user_encoding))
297
375
def _win32_fixdrive(path):
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376
"""Force drive letters to be consistent.
303
381
running python.exe under cmd.exe return capital C:\\
304
382
running win32 python inside a cygwin shell returns lowercase c:\\
306
drive, path = _nt_splitdrive(path)
384
drive, path = ntpath.splitdrive(path)
307
385
return drive.upper() + path
310
388
def _win32_abspath(path):
311
# Real _nt_abspath doesn't have a problem with a unicode cwd
312
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
315
def _win98_abspath(path):
316
"""Return the absolute version of a path.
317
Windows 98 safe implementation (python reimplementation
318
of Win32 API function GetFullPathNameW)
323
# \\HOST\path => //HOST/path
324
# //HOST/path => //HOST/path
325
# path => C:/cwd/path
328
# check for absolute path
329
drive = _nt_splitdrive(path)[0]
330
if drive == '' and path[:2] not in('//','\\\\'):
332
# we cannot simply os.path.join cwd and path
333
# because os.path.join('C:','/path') produce '/path'
334
# and this is incorrect
335
if path[:1] in ('/','\\'):
336
cwd = _nt_splitdrive(cwd)[0]
338
path = cwd + '\\' + path
339
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
389
# Real ntpath.abspath doesn't have a problem with a unicode cwd
390
return _win32_fixdrive(ntpath.abspath(path).replace('\\', '/'))
342
393
def _win32_realpath(path):
343
# Real _nt_realpath doesn't have a problem with a unicode cwd
344
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
394
# Real ntpath.realpath doesn't have a problem with a unicode cwd
395
return _win32_fixdrive(ntpath.realpath(path).replace('\\', '/'))
347
398
def _win32_pathjoin(*args):
348
return _nt_join(*args).replace('\\', '/')
399
return ntpath.join(*args).replace('\\', '/')
351
402
def _win32_normpath(path):
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
403
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
355
406
def _win32_getcwd():
356
return _win32_fixdrive(os.getcwdu().replace('\\', '/'))
407
return _win32_fixdrive(_getcwd().replace('\\', '/'))
359
410
def _win32_mkdtemp(*args, **kwargs):
360
411
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
363
def _add_rename_error_details(e, old, new):
364
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
365
% (old, new, e.strerror))
367
new_e.to_filename = new
371
414
def _win32_rename(old, new):
372
415
"""We expect to be able to atomically replace 'new' with old.
389
def _wrapped_rename(old, new):
390
"""Rename a file or directory"""
393
except (IOError, OSError), e:
394
# this is eventually called by all rename-like functions, so should
396
raise _add_rename_error_details(e, old, new)
399
432
def _mac_getcwd():
400
return unicodedata.normalize('NFC', os.getcwdu())
433
return unicodedata.normalize('NFC', _getcwd())
436
def _rename_wrap_exception(rename_func):
437
"""Adds extra information to any exceptions that come from rename().
439
The exception has an updated message and 'old_filename' and 'new_filename'
443
def _rename_wrapper(old, new):
445
rename_func(old, new)
447
detailed_error = OSError(e.errno, e.strerror +
448
" [occurred when renaming '%s' to '%s']" %
450
detailed_error.old_filename = old
451
detailed_error.new_filename = new
454
return _rename_wrapper
457
if sys.version_info > (3,):
463
# Default rename wraps os.rename()
464
rename = _rename_wrap_exception(os.rename)
403
466
# Default is to just use the python builtins, but these can be rebound on
404
467
# particular platforms.
405
468
abspath = _posix_abspath
406
469
realpath = _posix_realpath
407
470
pathjoin = os.path.join
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
471
normpath = _posix_normpath
472
path_from_environ = _posix_path_from_environ
473
_get_home_dir = _posix_get_home_dir
474
getuser_unicode = _posix_getuser_unicode
411
476
dirname = os.path.dirname
412
477
basename = os.path.basename
413
478
split = os.path.split
414
479
splitext = os.path.splitext
415
# These were already imported into local scope
480
# These were already lazily imported into local scope
416
481
# mkdtemp = tempfile.mkdtemp
417
482
# rmtree = shutil.rmtree
419
490
MIN_ABS_PATHLENGTH = 1
422
493
if sys.platform == 'win32':
423
if win32utils.winver == 'Windows 98':
424
abspath = _win98_abspath
426
abspath = _win32_abspath
494
abspath = _win32_abspath
427
495
realpath = _win32_realpath
428
496
pathjoin = _win32_pathjoin
429
497
normpath = _win32_normpath
430
498
getcwd = _win32_getcwd
431
499
mkdtemp = _win32_mkdtemp
432
rename = _win32_rename
500
rename = _rename_wrap_exception(_win32_rename)
502
from . import _walkdirs_win32
506
lstat = _walkdirs_win32.lstat
507
fstat = _walkdirs_win32.fstat
508
wrap_stat = _walkdirs_win32.wrap_stat
434
510
MIN_ABS_PATHLENGTH = 3
471
550
On my standard US Windows XP, the preferred encoding is
472
551
cp1252, but the console is cp437
553
:param trace: If True trace the selected encoding via mutter().
474
from bzrlib.trace import mutter
555
from .trace import mutter
475
556
output_encoding = getattr(sys.stdout, 'encoding', None)
476
557
if not output_encoding:
477
558
input_encoding = getattr(sys.stdin, 'encoding', None)
478
559
if not input_encoding:
479
560
output_encoding = get_user_encoding()
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
562
mutter('encoding stdout as osutils.get_user_encoding() %r',
483
565
output_encoding = input_encoding
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
567
mutter('encoding stdout as sys.stdin encoding %r',
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
571
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
487
572
if output_encoding == 'cp0':
488
573
# invalid encoding (cp0 means 'no codepage' on Windows)
489
574
output_encoding = get_user_encoding()
490
mutter('cp0 is invalid encoding.'
576
mutter('cp0 is invalid encoding.'
491
577
' encoding stdout as osutils.get_user_encoding() %r',
495
581
codecs.lookup(output_encoding)
496
582
except LookupError:
497
sys.stderr.write('bzr: warning:'
583
sys.stderr.write('brz: warning:'
498
584
' unknown terminal encoding %s.\n'
499
585
' Using encoding %s instead.\n'
500
586
% (output_encoding, get_user_encoding())
882
984
"""Return size of given open file."""
883
return os.fstat(f.fileno())[ST_SIZE]
886
# Define rand_bytes based on platform.
888
# Python 2.4 and later have os.urandom,
889
# but it doesn't work on some arches
891
rand_bytes = os.urandom
892
except (NotImplementedError, AttributeError):
893
# If python doesn't have os.urandom, or it doesn't work,
894
# then try to first pull random data from /dev/urandom
985
return os.fstat(f.fileno())[stat.ST_SIZE]
988
# Alias os.urandom to support platforms (which?) without /dev/urandom and
989
# override if it doesn't work. Avoid checking on windows where there is
990
# significant initialisation cost that can be avoided for some bzr calls.
992
rand_bytes = os.urandom
994
if rand_bytes.__module__ != "nt":
896
rand_bytes = file('/dev/urandom', 'rb').read
897
# Otherwise, use this hack as a last resort
898
except (IOError, OSError):
997
except NotImplementedError:
899
998
# not well seeded, but better than nothing
900
999
def rand_bytes(n):
970
1072
implementation should be loaded instead::
973
>>> import bzrlib._fictional_extension_pyx
1075
>>> import breezy._fictional_extension_pyx
974
1076
>>> except ImportError, e:
975
>>> bzrlib.osutils.failed_to_load_extension(e)
976
>>> import bzrlib._fictional_extension_py
1077
>>> breezy.osutils.failed_to_load_extension(e)
1078
>>> import breezy._fictional_extension_py
978
1080
# NB: This docstring is just an example, not a doctest, because doctest
979
1081
# currently can't cope with the use of lazy imports in this namespace --
982
1084
# This currently doesn't report the failure at the time it occurs, because
983
1085
# they tend to happen very early in startup when we can't check config
984
1086
# files etc, and also we want to report all failures but not spam the user
985
1087
# with 10 warnings.
986
from bzrlib import trace
987
1088
exception_str = str(exception)
988
1089
if exception_str not in _extension_load_failures:
989
1090
trace.mutter("failed to load compiled extension: %s" % exception_str)
993
1094
def report_extension_load_failures():
994
1095
if not _extension_load_failures:
996
from bzrlib.config import GlobalConfig
997
if GlobalConfig().get_user_option_as_bool('ignore_missing_extensions'):
1097
if config.GlobalConfig().suppress_warning('missing_extensions'):
999
1099
# the warnings framework should by default show this only once
1000
from bzrlib.trace import warning
1100
from .trace import warning
1002
"bzr: warning: some compiled extensions could not be loaded; "
1003
"see <https://answers.launchpad.net/bzr/+faq/703>")
1102
"brz: warning: some compiled extensions could not be loaded; "
1103
"see ``brz help missing-extensions``")
1004
1104
# we no longer show the specific missing extensions here, because it makes
1005
1105
# the message too long and scary - see
1006
1106
# https://bugs.launchpad.net/bzr/+bug/430529
1010
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1011
except ImportError, e:
1110
from ._chunks_to_lines_pyx import chunks_to_lines
1111
except ImportError as e:
1012
1112
failed_to_load_extension(e)
1013
from bzrlib._chunks_to_lines_py import chunks_to_lines
1113
from ._chunks_to_lines_py import chunks_to_lines
1016
1116
def split_lines(s):
1017
1117
"""Split s into lines, but without removing the newline characters."""
1018
1118
# Trivially convert a fulltext into a 'chunked' representation, and let
1019
1119
# chunks_to_lines do the heavy lifting.
1020
if isinstance(s, str):
1120
if isinstance(s, bytes):
1021
1121
# chunks_to_lines only supports 8-bit strings
1022
1122
return chunks_to_lines([s])
1049
1150
os.link(src, dest)
1050
except (OSError, IOError), e:
1151
except (OSError, IOError) as e:
1051
1152
if e.errno != errno.EXDEV:
1053
1154
shutil.copyfile(src, dest)
1056
1157
def delete_any(path):
1057
"""Delete a file, symlink or directory.
1158
"""Delete a file, symlink or directory.
1059
1160
Will delete even if readonly.
1062
1163
_delete_file_or_dir(path)
1063
except (OSError, IOError), e:
1164
except (OSError, IOError) as e:
1064
1165
if e.errno in (errno.EPERM, errno.EACCES):
1065
1166
# make writable and try again
1250
1351
# but for now, we haven't optimized...
1251
1352
return [canonical_relpath(base, p) for p in paths]
1355
def decode_filename(filename):
1356
"""Decode the filename using the filesystem encoding
1358
If it is unicode, it is returned.
1359
Otherwise it is decoded from the the filesystem's encoding. If decoding
1360
fails, a errors.BadFilenameEncoding exception is raised.
1362
if isinstance(filename, text_type):
1365
return filename.decode(_fs_enc)
1366
except UnicodeDecodeError:
1367
raise errors.BadFilenameEncoding(filename, _fs_enc)
1253
1370
def safe_unicode(unicode_or_utf8_string):
1254
1371
"""Coerce unicode_or_utf8_string into unicode.
1284
1401
return unicode_or_utf8_string.encode('utf-8')
1287
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1288
' Revision id generators should be creating utf8'
1292
def safe_revision_id(unicode_or_utf8_string, warn=True):
1404
def safe_revision_id(unicode_or_utf8_string):
1293
1405
"""Revision ids should now be utf8, but at one point they were unicode.
1295
1407
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1297
:param warn: Functions that are sanitizing user data can set warn=False
1298
1409
:return: None or a utf8 revision id.
1300
1411
if (unicode_or_utf8_string is None
1301
or unicode_or_utf8_string.__class__ == str):
1412
or unicode_or_utf8_string.__class__ == bytes):
1302
1413
return unicode_or_utf8_string
1304
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1306
return cache_utf8.encode(unicode_or_utf8_string)
1309
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1310
' generators should be creating utf8 file ids.')
1313
def safe_file_id(unicode_or_utf8_string, warn=True):
1414
raise TypeError('Unicode revision ids are no longer supported. '
1415
'Revision id generators should be creating utf8 revision '
1419
def safe_file_id(unicode_or_utf8_string):
1314
1420
"""File ids should now be utf8, but at one point they were unicode.
1316
1422
This is the same as safe_utf8, except it uses the cached encode functions
1358
1461
can be accessed by that path.
1361
return unicodedata.normalize('NFC', unicode(path)), True
1464
if isinstance(path, bytes):
1465
path = path.decode(sys.getfilesystemencoding())
1466
return unicodedata.normalize('NFC', path), True
1364
1469
def _inaccessible_normalized_filename(path):
1365
1470
__doc__ = _accessible_normalized_filename.__doc__
1367
normalized = unicodedata.normalize('NFC', unicode(path))
1472
if isinstance(path, bytes):
1473
path = path.decode(sys.getfilesystemencoding())
1474
normalized = unicodedata.normalize('NFC', path)
1368
1475
return normalized, normalized == path
1424
1537
None is returned if the width can't established precisely.
1427
- if BZR_COLUMNS is set, returns its value
1540
- if BRZ_COLUMNS is set, returns its value
1428
1541
- if there is no controlling terminal, returns None
1542
- query the OS, if the queried size has changed since the last query,
1429
1544
- if COLUMNS is set, returns its value,
1545
- if the OS has a value (even though it's never changed), return its value.
1431
1547
From there, we need to query the OS to get the size of the controlling
1550
On Unices we query the OS by:
1435
1551
- get termios.TIOCGWINSZ
1436
1552
- if an error occurs or a negative value is obtained, returns None
1554
On Windows we query the OS by:
1440
1555
- win32utils.get_console_size() decides,
1441
1556
- returns None on error (provided default value)
1558
# Note to implementors: if changing the rules for determining the width,
1559
# make sure you've considered the behaviour in these cases:
1560
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1561
# - brz log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1563
# - (add more interesting cases here, if you find any)
1564
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1565
# but we don't want to register a signal handler because it is impossible
1566
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1567
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1568
# time so we can notice if the reported size has changed, which should have
1444
# If BZR_COLUMNS is set, take it, user is always right
1571
# If BRZ_COLUMNS is set, take it, user is always right
1572
# Except if they specified 0 in which case, impose no limit here
1446
return int(os.environ['BZR_COLUMNS'])
1574
width = int(os.environ['BRZ_COLUMNS'])
1447
1575
except (KeyError, ValueError):
1577
if width is not None:
1450
1583
isatty = getattr(sys.stdout, 'isatty', None)
1451
if isatty is None or not isatty():
1452
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1584
if isatty is None or not isatty():
1585
# Don't guess, setting BRZ_COLUMNS is the recommended way to override.
1455
# If COLUMNS is set, take it, the terminal knows better (even inside a
1456
# given terminal, the application can decide to set COLUMNS to a lower
1457
# value (splitted screen) or a bigger value (scroll bars))
1589
width, height = os_size = _terminal_size(None, None)
1590
global _first_terminal_size, _terminal_size_state
1591
if _terminal_size_state == 'no_data':
1592
_first_terminal_size = os_size
1593
_terminal_size_state = 'unchanged'
1594
elif (_terminal_size_state == 'unchanged' and
1595
_first_terminal_size != os_size):
1596
_terminal_size_state = 'changed'
1598
# If the OS claims to know how wide the terminal is, and this value has
1599
# ever changed, use that.
1600
if _terminal_size_state == 'changed':
1601
if width is not None and width > 0:
1604
# If COLUMNS is set, use it.
1459
1606
return int(os.environ['COLUMNS'])
1460
1607
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1610
# Finally, use an unchanged size from the OS, if we have one.
1611
if _terminal_size_state == 'unchanged':
1612
if width is not None and width > 0:
1615
# The width could not be determined.
1471
1619
def _win32_terminal_size(width, height):
1498
1646
_terminal_size = _ioctl_terminal_size
1501
def _terminal_size_changed(signum, frame):
1502
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1503
width, height = _terminal_size(None, None)
1504
if width is not None:
1505
os.environ['COLUMNS'] = str(width)
1508
_registered_sigwinch = False
1509
def watch_sigwinch():
1510
"""Register for SIGWINCH, once and only once.
1512
Do nothing if the signal module is not available.
1514
global _registered_sigwinch
1515
if not _registered_sigwinch:
1518
if getattr(signal, "SIGWINCH", None) is not None:
1519
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1521
# python doesn't provide signal support, nothing we can do about it
1523
_registered_sigwinch = True
1526
1649
def supports_executable():
1527
1650
return sys.platform != "win32"
1712
1835
global _selected_dir_reader
1713
1836
if _selected_dir_reader is None:
1714
fs_encoding = _fs_enc.upper()
1715
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1716
# Win98 doesn't have unicode apis like FindFirstFileW
1717
# TODO: We possibly could support Win98 by falling back to the
1718
# original FindFirstFile, and using TCHAR instead of WCHAR,
1719
# but that gets a bit tricky, and requires custom compiling
1837
if sys.platform == "win32":
1722
from bzrlib._walkdirs_win32 import Win32ReadDir
1839
from ._walkdirs_win32 import Win32ReadDir
1723
1840
_selected_dir_reader = Win32ReadDir()
1724
1841
except ImportError:
1726
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1727
# ANSI_X3.4-1968 is a form of ASCII
1843
elif _fs_enc in ('utf-8', 'ascii'):
1729
from bzrlib._readdir_pyx import UTF8DirReader
1845
from ._readdir_pyx import UTF8DirReader
1730
1846
_selected_dir_reader = UTF8DirReader()
1731
except ImportError, e:
1847
except ImportError as e:
1732
1848
failed_to_load_extension(e)
1874
1993
This can be used to sort paths in the same way that walkdirs does.
1876
return (dirname(path) , path)
1995
return (dirname(path), path)
1879
1998
def compare_paths_prefix_order(path_a, path_b):
1880
1999
"""Compare path_a and path_b to generate the same order walkdirs uses."""
1881
2000
key_a = path_prefix_key(path_a)
1882
2001
key_b = path_prefix_key(path_b)
1883
return cmp(key_a, key_b)
2002
return (key_a > key_b) - (key_a < key_b)
1886
2005
_cached_user_encoding = None
1889
def get_user_encoding(use_cache=True):
2008
def get_user_encoding():
1890
2009
"""Find out what the preferred user encoding is.
1892
2011
This is generally the encoding that is used for command line parameters
1893
2012
and file contents. This may be different from the terminal encoding
1894
2013
or the filesystem encoding.
1896
:param use_cache: Enable cache for detected encoding.
1897
(This parameter is turned on by default,
1898
and required only for selftesting)
1900
2015
:return: A string defining the preferred user encoding
1902
2017
global _cached_user_encoding
1903
if _cached_user_encoding is not None and use_cache:
2018
if _cached_user_encoding is not None:
1904
2019
return _cached_user_encoding
1906
if sys.platform == 'darwin':
1907
# python locale.getpreferredencoding() always return
1908
# 'mac-roman' on darwin. That's a lie.
1909
sys.platform = 'posix'
1911
if os.environ.get('LANG', None) is None:
1912
# If LANG is not set, we end up with 'ascii', which is bad
1913
# ('mac-roman' is more than ascii), so we set a default which
1914
# will give us UTF-8 (which appears to work in all cases on
1915
# OSX). Users are still free to override LANG of course, as
1916
# long as it give us something meaningful. This work-around
1917
# *may* not be needed with python 3k and/or OSX 10.5, but will
1918
# work with them too -- vila 20080908
1919
os.environ['LANG'] = 'en_US.UTF-8'
1922
sys.platform = 'darwin'
2021
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2022
# Use the existing locale settings and call nl_langinfo directly
2023
# rather than going through getpreferredencoding. This avoids
2024
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2025
# possibility of the setlocale call throwing an error.
2026
user_encoding = locale.nl_langinfo(locale.CODESET)
2028
# GZ 2011-12-19: On windows could call GetACP directly instead.
2029
user_encoding = locale.getpreferredencoding(False)
1927
user_encoding = locale.getpreferredencoding()
1928
except locale.Error, e:
1929
sys.stderr.write('bzr: warning: %s\n'
1930
' Could not determine what text encoding to use.\n'
1931
' This error usually means your Python interpreter\n'
1932
' doesn\'t support the locale set by $LANG (%s)\n'
1933
" Continuing with ascii encoding.\n"
1934
% (e, os.environ.get('LANG')))
1935
user_encoding = 'ascii'
1937
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1938
# treat that as ASCII, and not support printing unicode characters to the
1941
# For python scripts run under vim, we get '', so also treat that as ASCII
1942
if user_encoding in (None, 'cp0', ''):
1943
user_encoding = 'ascii'
1947
codecs.lookup(user_encoding)
1949
sys.stderr.write('bzr: warning:'
2032
user_encoding = codecs.lookup(user_encoding).name
2034
if user_encoding not in ("", "cp0"):
2035
sys.stderr.write('brz: warning:'
1950
2036
' unknown encoding %s.'
1951
2037
' Continuing with ascii encoding.\n'
1952
2038
% user_encoding
1954
user_encoding = 'ascii'
1957
_cached_user_encoding = user_encoding
2040
user_encoding = 'ascii'
2042
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2043
if user_encoding == 'ascii':
2044
if sys.platform == 'darwin':
2045
# OSX is special-cased in Python to have a UTF-8 filesystem
2046
# encoding and previously had LANG set here if not present.
2047
user_encoding = 'utf-8'
2048
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2049
# for some other posix platforms as well.
2051
_cached_user_encoding = user_encoding
1959
2052
return user_encoding
2055
def get_diff_header_encoding():
2056
return get_terminal_encoding()
1962
2059
def get_host_name():
1963
2060
"""Return the current unicode host name.
1987
2093
empty string rather than raise an error), and repeats the recv if
1988
2094
interrupted by a signal.
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
2098
data = sock.recv(max_read_size)
2099
except socket.error as e:
1994
2100
eno = e.args[0]
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2101
if eno in _end_of_stream_errors:
1996
2102
# The connection was closed by the other side. Callers expect
1997
2103
# an empty string to signal end-of-stream.
1999
2105
elif eno == errno.EINTR:
2000
2106
# Retry the interrupted recv.
2004
2110
if report_activity is not None:
2005
report_activity(len(bytes), 'read')
2111
report_activity(len(data), 'read')
2009
2115
def recv_all(socket, count):
2028
2134
def send_all(sock, bytes, report_activity=None):
2029
2135
"""Send all bytes on a socket.
2031
2137
Breaks large blocks in smaller chunks to avoid buffering limitations on
2032
2138
some platforms, and catches EINTR which may be thrown if the send is
2033
2139
interrupted by a signal.
2035
2141
This is preferred to socket.sendall(), because it avoids portability bugs
2036
2142
and provides activity reporting.
2038
2144
:param report_activity: Call this as bytes are read, see
2039
2145
Transport._report_activity
2042
2148
byte_count = len(bytes)
2149
view = memoryview(bytes)
2043
2150
while sent_total < byte_count:
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2152
sent = sock.send(view[sent_total:sent_total+MAX_SOCKET_CHUNK])
2153
except (socket.error, IOError) as e:
2154
if e.args[0] in _end_of_stream_errors:
2155
raise errors.ConnectionReset(
2156
"Error trying to write to socket", e)
2047
2157
if e.args[0] != errno.EINTR:
2161
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2050
2163
sent_total += sent
2051
report_activity(sent, 'write')
2164
if report_activity is not None:
2165
report_activity(sent, 'write')
2168
def connect_socket(address):
2169
# Slight variation of the socket.create_connection() function (provided by
2170
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2171
# provide it for previous python versions. Also, we don't use the timeout
2172
# parameter (provided by the python implementation) so we don't implement
2174
err = socket.error('getaddrinfo returns an empty list')
2175
host, port = address
2176
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2177
af, socktype, proto, canonname, sa = res
2180
sock = socket.socket(af, socktype, proto)
2184
except socket.error as e:
2186
# 'err' is now the most recent error
2187
if sock is not None:
2054
2192
def dereference_path(path):
2082
2220
If and when pkg_resources becomes a standard library, this routine
2083
2221
can delegate to it.
2085
# Check package name is within bzrlib
2086
if package == "bzrlib":
2223
# Check package name is within breezy
2224
if package == "breezy":
2087
2225
resource_relpath = resource_name
2088
elif package.startswith("bzrlib."):
2089
package = package[len("bzrlib."):].replace('.', os.sep)
2226
elif package.startswith("breezy."):
2227
package = package[len("breezy."):].replace('.', os.sep)
2090
2228
resource_relpath = pathjoin(package, resource_name)
2092
raise errors.BzrError('resource package %s not in bzrlib' % package)
2230
raise errors.BzrError('resource package %s not in breezy' % package)
2094
2232
# Map the resource to a file and read its contents
2095
base = dirname(bzrlib.__file__)
2233
base = dirname(breezy.__file__)
2096
2234
if getattr(sys, 'frozen', None): # bzr.exe
2097
2235
base = abspath(pathjoin(base, '..', '..'))
2098
filename = pathjoin(base, resource_relpath)
2099
return open(filename, 'rU').read()
2236
with open(pathjoin(base, resource_relpath), "rt") as f:
2102
2239
def file_kind_from_stat_mode_thunk(mode):
2103
2240
global file_kind_from_stat_mode
2104
2241
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2106
from bzrlib._readdir_pyx import UTF8DirReader
2243
from ._readdir_pyx import UTF8DirReader
2107
2244
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2108
except ImportError, e:
2245
except ImportError as e:
2109
2246
# This is one time where we won't warn that an extension failed to
2110
2247
# load. The extension is never available on Windows anyway.
2111
from bzrlib._readdir_py import (
2248
from ._readdir_py import (
2112
2249
_kind_from_mode as file_kind_from_stat_mode
2114
2251
return file_kind_from_stat_mode(mode)
2115
2252
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2254
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2258
except OSError as e:
2122
2259
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2260
raise errors.NoSuchFile(f)
2263
def file_kind(f, _lstat=os.lstat):
2264
stat_value = file_stat(f, _lstat)
2265
return file_kind_from_stat_mode(stat_value.st_mode)
2127
2267
def until_no_eintr(f, *a, **kw):
2128
2268
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2270
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2271
if EINTR does occur. This is typically only true for low-level operations
2132
2272
like os.read. If in any doubt, don't use this.
2134
2274
Keep in mind that this is not a complete solution to EINTR. There is
2135
2275
probably code in the Python standard library and other dependencies that
2136
2276
may encounter EINTR if a signal arrives (and there is signal handler for
2137
that signal). So this function can reduce the impact for IO that bzrlib
2277
that signal). So this function can reduce the impact for IO that breezy
2138
2278
directly controls, but it is not a complete solution.
2140
2280
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2143
2283
return f(*a, **kw)
2144
except (IOError, OSError), e:
2284
except (IOError, OSError) as e:
2145
2285
if e.errno == errno.EINTR:
2150
def re_compile_checked(re_string, flags=0, where=""):
2151
"""Return a compiled re, or raise a sensible error.
2153
This should only be used when compiling user-supplied REs.
2155
:param re_string: Text form of regular expression.
2156
:param flags: eg re.IGNORECASE
2157
:param where: Message explaining to the user the context where
2158
it occurred, eg 'log search filter'.
2160
# from https://bugs.launchpad.net/bzr/+bug/251352
2162
re_obj = re.compile(re_string, flags)
2167
where = ' in ' + where
2168
# despite the name 'error' is a type
2169
raise errors.BzrCommandError('Invalid regular expression%s: %r: %s'
2170
% (where, re_string, e))
2173
2290
if sys.platform == "win32":
2176
2293
return msvcrt.getch()
2181
2298
fd = sys.stdin.fileno()
2182
2299
settings = termios.tcgetattr(fd)
2187
2304
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2307
if sys.platform.startswith('linux'):
2192
2308
def _local_concurrency():
2194
prefix = 'processor'
2195
for line in file('/proc/cpuinfo', 'rb'):
2196
if line.startswith(prefix):
2197
concurrency = int(line[line.find(':')+1:]) + 1
2310
return os.sysconf('SC_NPROCESSORS_ONLN')
2311
except (ValueError, OSError, AttributeError):
2199
2313
elif sys.platform == 'darwin':
2200
2314
def _local_concurrency():
2201
2315
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2316
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2317
elif "bsd" in sys.platform:
2204
2318
def _local_concurrency():
2205
2319
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2320
stdout=subprocess.PIPE).communicate()[0]
2302
2421
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2423
open_file = open
2426
def available_backup_name(base, exists):
2427
"""Find a non-existing backup file name.
2429
This will *not* create anything, this only return a 'free' entry. This
2430
should be used for checking names in a directory below a locked
2431
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2432
Leap) and generally discouraged.
2434
:param base: The base name.
2436
:param exists: A callable returning True if the path parameter exists.
2439
name = "%s.~%d~" % (base, counter)
2442
name = "%s.~%d~" % (base, counter)
2446
def set_fd_cloexec(fd):
2447
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2448
support for this is not available.
2452
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2453
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2454
except (ImportError, AttributeError):
2455
# Either the fcntl module or specific constants are not present
2459
def find_executable_on_path(name):
2460
"""Finds an executable on the PATH.
2462
On Windows, this will try to append each extension in the PATHEXT
2463
environment variable to the name, if it cannot be found with the name
2466
:param name: The base name of the executable.
2467
:return: The path to the executable found or None.
2469
if sys.platform == 'win32':
2470
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2471
exts = [ext.lower() for ext in exts]
2472
base, ext = os.path.splitext(name)
2474
if ext.lower() not in exts:
2480
path = os.environ.get('PATH')
2481
if path is not None:
2482
path = path.split(os.pathsep)
2485
f = os.path.join(d, name) + ext
2486
if os.access(f, os.X_OK):
2488
if sys.platform == 'win32':
2489
app_path = win32utils.get_app_path(name)
2490
if app_path != name:
2495
def _posix_is_local_pid_dead(pid):
2496
"""True if pid doesn't correspond to live process on this machine"""
2498
# Special meaning of unix kill: just check if it's there.
2500
except OSError as e:
2501
if e.errno == errno.ESRCH:
2502
# On this machine, and really not found: as sure as we can be
2505
elif e.errno == errno.EPERM:
2506
# exists, though not ours
2509
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2510
# Don't really know.
2513
# Exists and our process: not dead.
2516
if sys.platform == "win32":
2517
is_local_pid_dead = win32utils.is_local_pid_dead
2519
is_local_pid_dead = _posix_is_local_pid_dead
2521
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2522
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2523
if getattr(errno, name, None) is not None]
2526
def fdatasync(fileno):
2527
"""Flush file contents to disk if possible.
2529
:param fileno: Integer OS file handle.
2530
:raises TransportNotPossible: If flushing to disk is not possible.
2532
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2536
except IOError as e:
2537
# See bug #1075108, on some platforms fdatasync exists, but can
2538
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2539
# and reduce the chance of corruption-on-powerloss situations. It
2540
# is not a mandatory call, so it is ok to suppress failures.
2541
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2542
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2546
def ensure_empty_directory_exists(path, exception_class):
2547
"""Make sure a local directory exists and is empty.
2549
If it does not exist, it is created. If it exists and is not empty, an
2550
instance of exception_class is raised.
2554
except OSError as e:
2555
if e.errno != errno.EEXIST:
2557
if os.listdir(path) != []:
2558
raise exception_class(path)
2561
def is_environment_error(evalue):
2562
"""True if exception instance is due to a process environment issue
2564
This includes OSError and IOError, but also other errors that come from
2565
the operating system or core libraries but are not subclasses of those.
2567
if isinstance(evalue, (EnvironmentError, select.error)):
2569
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
breezy/osutils.py
