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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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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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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from cStringIO import StringIO
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from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
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S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.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 mkdtemp
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from tempfile import (
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from bzrlib import (
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from bzrlib.i18n import gettext
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from bzrlib import symbol_versioning
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from bzrlib.symbol_versioning import (
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deprecated_function,
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from bzrlib import symbol_versioning, _fs_enc
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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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from bzrlib.trace import mutter
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# On win32, O_BINARY is used to indicate the file should
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# be opened in binary mode, rather than text mode.
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# On other platforms, O_BINARY doesn't exist, because
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# they always open in binary mode, so it is okay to
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# OR with 0 on those platforms.
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# O_NOINHERIT and O_TEXT exists only on win32 too.
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# OR with 0 on those platforms
86
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O_BINARY = getattr(os, 'O_BINARY', 0)
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O_TEXT = getattr(os, 'O_TEXT', 0)
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O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
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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(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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chmod_if_possible(filename, mod)
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mod = os.stat(filename).st_mode
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os.chmod(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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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
120
# It is probably faster to just do the chmod, rather than
121
# doing a stat, and then trying to compare
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os.chmod(filename, mode)
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except (IOError, OSError),e:
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# Permission/access denied seems to commonly happen on smbfs; there's
125
# probably no point warning about it.
126
# <https://bugs.launchpad.net/bzr/+bug/606537>
127
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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"""Return the smallset subset of paths which are outside paths.
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:param paths: A container (and hence not None) of paths.
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:return: A set of paths sufficient to include everything in paths via
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is_inside, drawn from the paths parameter.
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return path.split('/')
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sorted_paths = sorted(list(paths), key=sort_key)
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search_paths = [sorted_paths[0]]
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for path in sorted_paths[1:]:
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if not is_inside(search_paths[-1], path):
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# This path is unique, add it
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search_paths.append(path)
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return set(search_paths)
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mod = os.stat(filename).st_mode
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os.chmod(filename, mod)
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unlink_func(tmp_name)
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rename_func(tmp_name, new)
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if failure_exc is not None:
289
raise failure_exc[0], failure_exc[1], failure_exc[2]
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
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# choke on a Unicode string containing a relative path if
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
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_fs_enc = sys.getfilesystemencoding() or 'utf-8'
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def _posix_abspath(path):
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# jam 20060426 rather than encoding to fsencoding
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# copy posixpath.abspath, but use os.getcwdu instead
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if not posixpath.isabs(path):
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path = posixpath.join(getcwd(), path)
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return _posix_normpath(path)
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return posixpath.normpath(path)
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def _posix_realpath(path):
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return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
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def _posix_normpath(path):
311
path = posixpath.normpath(path)
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# Bug 861008: posixpath.normpath() returns a path normalized according to
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# the POSIX standard, which stipulates (for compatibility reasons) that two
314
# leading slashes must not be simplified to one, and only if there are 3 or
315
# more should they be simplified as one. So we treat the leading 2 slashes
316
# as a special case here by simply removing the first slash, as we consider
317
# that breaking POSIX compatibility for this obscure feature is acceptable.
318
# This is not a paranoid precaution, as we notably get paths like this when
319
# the repo is hosted at the root of the filesystem, i.e. in "/".
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if path.startswith('//'):
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def _posix_path_from_environ(key):
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"""Get unicode path from `key` in environment or None if not present
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Note that posix systems use arbitrary byte strings for filesystem objects,
329
so a path that raises BadFilenameEncoding here may still be accessible.
331
val = os.environ.get(key, None)
335
return val.decode(_fs_enc)
336
except UnicodeDecodeError:
337
# GZ 2011-12-12:Ideally want to include `key` in the exception message
338
raise errors.BadFilenameEncoding(val, _fs_enc)
341
def _posix_getuser_unicode():
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"""Get username from environment or password database as unicode"""
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name = getpass.getuser()
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user_encoding = get_user_encoding()
346
return name.decode(user_encoding)
347
except UnicodeDecodeError:
348
raise errors.BzrError("Encoding of username %r is unsupported by %s "
349
"application locale." % (name, user_encoding))
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def _win32_fixdrive(path):
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"""Force drive letters to be consistent.
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def rmtree(path, ignore_errors=False, onerror=_win32_delete_readonly):
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"""Replacer for shutil.rmtree: could remove readonly dirs/files"""
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return shutil.rmtree(path, ignore_errors, onerror)
506
f = win32utils.get_unicode_argv # special function or None
509
path_from_environ = win32utils.get_environ_unicode
510
getuser_unicode = win32utils.get_user_name
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386
elif sys.platform == 'darwin':
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getcwd = _mac_getcwd
516
def get_terminal_encoding(trace=False):
390
def get_terminal_encoding():
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"""Find the best encoding for printing to the screen.
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This attempts to check both sys.stdout and sys.stdin to see
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what encoding they are in, and if that fails it falls back to
521
osutils.get_user_encoding().
395
bzrlib.user_encoding.
522
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The problem is that on Windows, locale.getpreferredencoding()
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is not the same encoding as that used by the console:
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http://mail.python.org/pipermail/python-list/2003-May/162357.html
526
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On my standard US Windows XP, the preferred encoding is
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cp1252, but the console is cp437
529
:param trace: If True trace the selected encoding via mutter().
531
from bzrlib.trace import mutter
532
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output_encoding = getattr(sys.stdout, 'encoding', None)
533
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if not output_encoding:
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405
input_encoding = getattr(sys.stdin, 'encoding', None)
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406
if not input_encoding:
536
output_encoding = get_user_encoding()
538
mutter('encoding stdout as osutils.get_user_encoding() %r',
407
output_encoding = bzrlib.user_encoding
408
mutter('encoding stdout as bzrlib.user_encoding %r', output_encoding)
541
410
output_encoding = input_encoding
543
mutter('encoding stdout as sys.stdin encoding %r',
411
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
547
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
413
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
548
414
if output_encoding == 'cp0':
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# invalid encoding (cp0 means 'no codepage' on Windows)
550
output_encoding = get_user_encoding()
552
mutter('cp0 is invalid encoding.'
553
' encoding stdout as osutils.get_user_encoding() %r',
416
output_encoding = bzrlib.user_encoding
417
mutter('cp0 is invalid encoding.'
418
' encoding stdout as bzrlib.user_encoding %r', output_encoding)
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421
codecs.lookup(output_encoding)
643
def pumpfile(from_file, to_file, read_length=-1, buff_size=32768,
644
report_activity=None, direction='read'):
645
"""Copy contents of one file to another.
647
The read_length can either be -1 to read to end-of-file (EOF) or
648
it can specify the maximum number of bytes to read.
650
The buff_size represents the maximum size for each read operation
651
performed on from_file.
653
:param report_activity: Call this as bytes are read, see
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Transport._report_activity
655
:param direction: Will be passed to report_activity
657
:return: The number of bytes copied.
661
# read specified number of bytes
663
while read_length > 0:
664
num_bytes_to_read = min(read_length, buff_size)
666
block = from_file.read(num_bytes_to_read)
670
if report_activity is not None:
671
report_activity(len(block), direction)
674
actual_bytes_read = len(block)
675
read_length -= actual_bytes_read
676
length += actual_bytes_read
680
block = from_file.read(buff_size)
684
if report_activity is not None:
685
report_activity(len(block), direction)
691
def pump_string_file(bytes, file_handle, segment_size=None):
692
"""Write bytes to file_handle in many smaller writes.
694
:param bytes: The string to write.
695
:param file_handle: The file to write to.
697
# Write data in chunks rather than all at once, because very large
698
# writes fail on some platforms (e.g. Windows with SMB mounted
701
segment_size = 5242880 # 5MB
702
segments = range(len(bytes) / segment_size + 1)
703
write = file_handle.write
704
for segment_index in segments:
705
segment = buffer(bytes, segment_index * segment_size, segment_size)
535
def pumpfile(fromfile, tofile):
536
"""Copy contents of one file to another."""
539
b = fromfile.read(BUFSIZE)
709
545
def file_iterator(input_file, readsize=32768):
810
615
:param timezone: How to display the time: 'utc', 'original' for the
811
616
timezone specified by offset, or 'local' for the process's current
813
:param date_fmt: strftime format.
814
:param show_offset: Whether to append the timezone.
816
(date_fmt, tt, offset_str) = \
817
_format_date(t, offset, timezone, date_fmt, show_offset)
818
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
819
date_str = time.strftime(date_fmt, tt)
820
return date_str + offset_str
823
# Cache of formatted offset strings
827
def format_date_with_offset_in_original_timezone(t, offset=0,
828
_cache=_offset_cache):
829
"""Return a formatted date string in the original timezone.
831
This routine may be faster then format_date.
833
:param t: Seconds since the epoch.
834
:param offset: Timezone offset in seconds east of utc.
838
tt = time.gmtime(t + offset)
839
date_fmt = _default_format_by_weekday_num[tt[6]]
840
date_str = time.strftime(date_fmt, tt)
841
offset_str = _cache.get(offset, None)
842
if offset_str is None:
843
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
844
_cache[offset] = offset_str
845
return date_str + offset_str
848
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
850
"""Return an unicode date string formatted according to the current locale.
852
:param t: Seconds since the epoch.
853
:param offset: Timezone offset in seconds east of utc.
854
:param timezone: How to display the time: 'utc', 'original' for the
855
timezone specified by offset, or 'local' for the process's current
857
:param date_fmt: strftime format.
858
:param show_offset: Whether to append the timezone.
860
(date_fmt, tt, offset_str) = \
861
_format_date(t, offset, timezone, date_fmt, show_offset)
862
date_str = time.strftime(date_fmt, tt)
863
if not isinstance(date_str, unicode):
864
date_str = date_str.decode(get_user_encoding(), 'replace')
865
return date_str + offset_str
868
def _format_date(t, offset, timezone, date_fmt, show_offset):
618
:param show_offset: Whether to append the timezone.
619
:param date_fmt: strftime format.
869
621
if timezone == 'utc':
870
622
tt = time.gmtime(t)
996
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
751
raise errors.BzrError("sorry, %r not allowed in path" % f)
997
752
elif (f == '.') or (f == ''):
1004
758
def joinpath(p):
759
assert isinstance(p, (list, tuple))
1006
761
if (f == '..') or (f is None) or (f == ''):
1007
raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
762
raise errors.BzrError("sorry, %r not allowed in path" % f)
1008
763
return pathjoin(*p)
1011
def parent_directories(filename):
1012
"""Return the list of parent directories, deepest first.
1014
For example, parent_directories("a/b/c") -> ["a/b", "a"].
1017
parts = splitpath(dirname(filename))
1019
parents.append(joinpath(parts))
1024
_extension_load_failures = []
1027
def failed_to_load_extension(exception):
1028
"""Handle failing to load a binary extension.
1030
This should be called from the ImportError block guarding the attempt to
1031
import the native extension. If this function returns, the pure-Python
1032
implementation should be loaded instead::
1035
>>> import bzrlib._fictional_extension_pyx
1036
>>> except ImportError, e:
1037
>>> bzrlib.osutils.failed_to_load_extension(e)
1038
>>> import bzrlib._fictional_extension_py
1040
# NB: This docstring is just an example, not a doctest, because doctest
1041
# currently can't cope with the use of lazy imports in this namespace --
1044
# This currently doesn't report the failure at the time it occurs, because
1045
# they tend to happen very early in startup when we can't check config
1046
# files etc, and also we want to report all failures but not spam the user
1048
exception_str = str(exception)
1049
if exception_str not in _extension_load_failures:
1050
trace.mutter("failed to load compiled extension: %s" % exception_str)
1051
_extension_load_failures.append(exception_str)
1054
def report_extension_load_failures():
1055
if not _extension_load_failures:
1057
if config.GlobalStack().get('ignore_missing_extensions'):
1059
# the warnings framework should by default show this only once
1060
from bzrlib.trace import warning
1062
"bzr: warning: some compiled extensions could not be loaded; "
1063
"see <https://answers.launchpad.net/bzr/+faq/703>")
1064
# we no longer show the specific missing extensions here, because it makes
1065
# the message too long and scary - see
1066
# https://bugs.launchpad.net/bzr/+bug/430529
1070
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1071
except ImportError, e:
1072
failed_to_load_extension(e)
1073
from bzrlib._chunks_to_lines_py import chunks_to_lines
766
@deprecated_function(zero_nine)
767
def appendpath(p1, p2):
771
return pathjoin(p1, p2)
1076
774
def split_lines(s):
1077
775
"""Split s into lines, but without removing the newline characters."""
1078
# Trivially convert a fulltext into a 'chunked' representation, and let
1079
# chunks_to_lines do the heavy lifting.
1080
if isinstance(s, str):
1081
# chunks_to_lines only supports 8-bit strings
1082
return chunks_to_lines([s])
1084
return _split_lines(s)
1087
def _split_lines(s):
1088
"""Split s into lines, but without removing the newline characters.
1090
This supports Unicode or plain string objects.
1092
776
lines = s.split('\n')
1093
777
result = [line + '\n' for line in lines[:-1]]
1215
852
os.path.commonprefix (python2.4) has a bad bug that it works just
1216
853
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
1217
854
avoids that problem.
1219
NOTE: `base` should not have a trailing slash otherwise you'll get
1220
PathNotChild exceptions regardless of `path`.
1223
if len(base) < MIN_ABS_PATHLENGTH:
1224
# must have space for e.g. a drive letter
1225
raise ValueError(gettext('%r is too short to calculate a relative path')
857
assert len(base) >= MIN_ABS_PATHLENGTH, ('Length of base must be equal or'
858
' exceed the platform minimum length (which is %d)' %
1228
861
rp = abspath(path)
1233
if len(head) <= len(base) and head != base:
1234
raise errors.PathNotChild(rp, base)
865
while len(head) >= len(base):
1235
866
if head == base:
1237
head, tail = split(head)
868
head, tail = os.path.split(head)
872
raise errors.PathNotChild(rp, base)
1242
return pathjoin(*reversed(s))
1247
def _cicp_canonical_relpath(base, path):
1248
"""Return the canonical path relative to base.
1250
Like relpath, but on case-insensitive-case-preserving file-systems, this
1251
will return the relpath as stored on the file-system rather than in the
1252
case specified in the input string, for all existing portions of the path.
1254
This will cause O(N) behaviour if called for every path in a tree; if you
1255
have a number of paths to convert, you should use canonical_relpaths().
1257
# TODO: it should be possible to optimize this for Windows by using the
1258
# win32 API FindFiles function to look for the specified name - but using
1259
# os.listdir() still gives us the correct, platform agnostic semantics in
1262
rel = relpath(base, path)
1263
# '.' will have been turned into ''
1267
abs_base = abspath(base)
1269
_listdir = os.listdir
1271
# use an explicit iterator so we can easily consume the rest on early exit.
1272
bit_iter = iter(rel.split('/'))
1273
for bit in bit_iter:
1276
next_entries = _listdir(current)
1277
except OSError: # enoent, eperm, etc
1278
# We can't find this in the filesystem, so just append the
1280
current = pathjoin(current, bit, *list(bit_iter))
1282
for look in next_entries:
1283
if lbit == look.lower():
1284
current = pathjoin(current, look)
1287
# got to the end, nothing matched, so we just return the
1288
# non-existing bits as they were specified (the filename may be
1289
# the target of a move, for example).
1290
current = pathjoin(current, bit, *list(bit_iter))
1292
return current[len(abs_base):].lstrip('/')
1294
# XXX - TODO - we need better detection/integration of case-insensitive
1295
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1296
# filesystems), for example, so could probably benefit from the same basic
1297
# support there. For now though, only Windows and OSX get that support, and
1298
# they get it for *all* file-systems!
1299
if sys.platform in ('win32', 'darwin'):
1300
canonical_relpath = _cicp_canonical_relpath
1302
canonical_relpath = relpath
1304
def canonical_relpaths(base, paths):
1305
"""Create an iterable to canonicalize a sequence of relative paths.
1307
The intent is for this implementation to use a cache, vastly speeding
1308
up multiple transformations in the same directory.
1310
# but for now, we haven't optimized...
1311
return [canonical_relpath(base, p) for p in paths]
1314
def decode_filename(filename):
1315
"""Decode the filename using the filesystem encoding
1317
If it is unicode, it is returned.
1318
Otherwise it is decoded from the the filesystem's encoding. If decoding
1319
fails, a errors.BadFilenameEncoding exception is raised.
1321
if type(filename) is unicode:
1324
return filename.decode(_fs_enc)
1325
except UnicodeDecodeError:
1326
raise errors.BadFilenameEncoding(filename, _fs_enc)
1329
880
def safe_unicode(unicode_or_utf8_string):
1330
881
"""Coerce unicode_or_utf8_string into unicode.
1332
883
If it is unicode, it is returned.
1333
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1334
wrapped in a BzrBadParameterNotUnicode exception.
884
Otherwise it is decoded from utf-8. If a decoding error
885
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
886
as a BzrBadParameter exception.
1336
888
if isinstance(unicode_or_utf8_string, unicode):
1337
889
return unicode_or_utf8_string
1450
1002
normalized_filename = _inaccessible_normalized_filename
1453
def set_signal_handler(signum, handler, restart_syscall=True):
1454
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1455
on platforms that support that.
1457
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1458
automatically restart (by calling `signal.siginterrupt(signum,
1459
False)`). May be ignored if the feature is not available on this
1460
platform or Python version.
1464
siginterrupt = signal.siginterrupt
1466
# This python implementation doesn't provide signal support, hence no
1469
except AttributeError:
1470
# siginterrupt doesn't exist on this platform, or for this version
1472
siginterrupt = lambda signum, flag: None
1474
def sig_handler(*args):
1475
# Python resets the siginterrupt flag when a signal is
1476
# received. <http://bugs.python.org/issue8354>
1477
# As a workaround for some cases, set it back the way we want it.
1478
siginterrupt(signum, False)
1479
# Now run the handler function passed to set_signal_handler.
1482
sig_handler = handler
1483
old_handler = signal.signal(signum, sig_handler)
1485
siginterrupt(signum, False)
1489
default_terminal_width = 80
1490
"""The default terminal width for ttys.
1492
This is defined so that higher levels can share a common fallback value when
1493
terminal_width() returns None.
1496
# Keep some state so that terminal_width can detect if _terminal_size has
1497
# returned a different size since the process started. See docstring and
1498
# comments of terminal_width for details.
1499
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1500
_terminal_size_state = 'no_data'
1501
_first_terminal_size = None
1503
1005
def terminal_width():
1504
"""Return terminal width.
1506
None is returned if the width can't established precisely.
1509
- if BZR_COLUMNS is set, returns its value
1510
- if there is no controlling terminal, returns None
1511
- query the OS, if the queried size has changed since the last query,
1513
- if COLUMNS is set, returns its value,
1514
- if the OS has a value (even though it's never changed), return its value.
1516
From there, we need to query the OS to get the size of the controlling
1519
On Unices we query the OS by:
1520
- get termios.TIOCGWINSZ
1521
- if an error occurs or a negative value is obtained, returns None
1523
On Windows we query the OS by:
1524
- win32utils.get_console_size() decides,
1525
- returns None on error (provided default value)
1527
# Note to implementors: if changing the rules for determining the width,
1528
# make sure you've considered the behaviour in these cases:
1529
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1530
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1532
# - (add more interesting cases here, if you find any)
1533
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1534
# but we don't want to register a signal handler because it is impossible
1535
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1536
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1537
# time so we can notice if the reported size has changed, which should have
1540
# If BZR_COLUMNS is set, take it, user is always right
1541
# Except if they specified 0 in which case, impose no limit here
1543
width = int(os.environ['BZR_COLUMNS'])
1544
except (KeyError, ValueError):
1546
if width is not None:
1552
isatty = getattr(sys.stdout, 'isatty', None)
1553
if isatty is None or not isatty():
1554
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1558
width, height = os_size = _terminal_size(None, None)
1559
global _first_terminal_size, _terminal_size_state
1560
if _terminal_size_state == 'no_data':
1561
_first_terminal_size = os_size
1562
_terminal_size_state = 'unchanged'
1563
elif (_terminal_size_state == 'unchanged' and
1564
_first_terminal_size != os_size):
1565
_terminal_size_state = 'changed'
1567
# If the OS claims to know how wide the terminal is, and this value has
1568
# ever changed, use that.
1569
if _terminal_size_state == 'changed':
1570
if width is not None and width > 0:
1573
# If COLUMNS is set, use it.
1575
return int(os.environ['COLUMNS'])
1576
except (KeyError, ValueError):
1579
# Finally, use an unchanged size from the OS, if we have one.
1580
if _terminal_size_state == 'unchanged':
1581
if width is not None and width > 0:
1584
# The width could not be determined.
1588
def _win32_terminal_size(width, height):
1589
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1590
return width, height
1593
def _ioctl_terminal_size(width, height):
1006
"""Return estimated terminal width."""
1007
if sys.platform == 'win32':
1008
return win32utils.get_console_size()[0]
1595
1011
import struct, fcntl, termios
1596
1012
s = struct.pack('HHHH', 0, 0, 0, 0)
1597
1013
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1598
height, width = struct.unpack('HHHH', x)[0:2]
1599
except (IOError, AttributeError):
1014
width = struct.unpack('HHHH', x)[1]
1601
return width, height
1603
_terminal_size = None
1604
"""Returns the terminal size as (width, height).
1606
:param width: Default value for width.
1607
:param height: Default value for height.
1609
This is defined specifically for each OS and query the size of the controlling
1610
terminal. If any error occurs, the provided default values should be returned.
1612
if sys.platform == 'win32':
1613
_terminal_size = _win32_terminal_size
1615
_terminal_size = _ioctl_terminal_size
1019
width = int(os.environ['COLUMNS'])
1618
1028
def supports_executable():
1665
1075
raise errors.IllegalPath(path)
1668
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1670
def _is_error_enotdir(e):
1671
"""Check if this exception represents ENOTDIR.
1673
Unfortunately, python is very inconsistent about the exception
1674
here. The cases are:
1675
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1676
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1677
which is the windows error code.
1678
3) Windows, Python2.5 uses errno == EINVAL and
1679
winerror == ERROR_DIRECTORY
1681
:param e: An Exception object (expected to be OSError with an errno
1682
attribute, but we should be able to cope with anything)
1683
:return: True if this represents an ENOTDIR error. False otherwise.
1685
en = getattr(e, 'errno', None)
1686
if (en == errno.ENOTDIR
1687
or (sys.platform == 'win32'
1688
and (en == _WIN32_ERROR_DIRECTORY
1689
or (en == errno.EINVAL
1690
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1696
1078
def walkdirs(top, prefix=""):
1697
1079
"""Yield data about all the directories in a tree.
1699
1081
This yields all the data about the contents of a directory at a time.
1700
1082
After each directory has been yielded, if the caller has mutated the list
1701
1083
to exclude some directories, they are then not descended into.
1703
1085
The data yielded is of the form:
1704
1086
((directory-relpath, directory-path-from-top),
1705
[(relpath, basename, kind, lstat, path-from-top), ...]),
1087
[(directory-relpath, basename, kind, lstat, path-from-top), ...]),
1706
1088
- directory-relpath is the relative path of the directory being returned
1707
1089
with respect to top. prefix is prepended to this.
1708
- directory-path-from-root is the path including top for this directory.
1090
- directory-path-from-root is the path including top for this directory.
1709
1091
It is suitable for use with os functions.
1710
1092
- relpath is the relative path within the subtree being walked.
1711
1093
- basename is the basename of the path
1801
1149
path-from-top might be unicode or utf8, but it is the correct path to
1802
1150
pass to os functions to affect the file in question. (such as os.lstat)
1804
global _selected_dir_reader
1805
if _selected_dir_reader is None:
1806
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1807
# Win98 doesn't have unicode apis like FindFirstFileW
1808
# TODO: We possibly could support Win98 by falling back to the
1809
# original FindFirstFile, and using TCHAR instead of WCHAR,
1810
# but that gets a bit tricky, and requires custom compiling
1813
from bzrlib._walkdirs_win32 import Win32ReadDir
1814
_selected_dir_reader = Win32ReadDir()
1817
elif _fs_enc in ('utf-8', 'ascii'):
1819
from bzrlib._readdir_pyx import UTF8DirReader
1820
_selected_dir_reader = UTF8DirReader()
1821
except ImportError, e:
1822
failed_to_load_extension(e)
1825
if _selected_dir_reader is None:
1826
# Fallback to the python version
1827
_selected_dir_reader = UnicodeDirReader()
1152
fs_encoding = sys.getfilesystemencoding().upper()
1153
if (sys.platform == 'win32' or
1154
fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968')): # ascii
1155
return _walkdirs_unicode_to_utf8(top, prefix=prefix)
1157
return _walkdirs_fs_utf8(top, prefix=prefix)
1160
def _walkdirs_fs_utf8(top, prefix=""):
1161
"""See _walkdirs_utf8.
1163
This sub-function is called when we know the filesystem is already in utf8
1164
encoding. So we don't need to transcode filenames.
1167
_directory = _directory_kind
1168
_listdir = os.listdir
1169
_kind_from_mode = _formats.get
1829
1171
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1830
1172
# But we don't actually uses 1-3 in pending, so set them to None
1831
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1832
read_dir = _selected_dir_reader.read_dir
1833
_directory = _directory_kind
1173
pending = [(safe_utf8(prefix), None, None, None, safe_utf8(top))]
1835
relroot, _, _, _, top = pending[-1].pop()
1838
dirblock = sorted(read_dir(relroot, top))
1175
relroot, _, _, _, top = pending.pop()
1177
relprefix = relroot + '/'
1180
top_slash = top + '/'
1183
append = dirblock.append
1184
for name in sorted(_listdir(top)):
1185
abspath = top_slash + name
1186
statvalue = _lstat(abspath)
1187
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1188
append((relprefix + name, name, kind, statvalue, abspath))
1839
1189
yield (relroot, top), dirblock
1840
1191
# push the user specified dirs from dirblock
1841
next = [d for d in reversed(dirblock) if d[2] == _directory]
1843
pending.append(next)
1846
class UnicodeDirReader(DirReader):
1847
"""A dir reader for non-utf8 file systems, which transcodes."""
1849
__slots__ = ['_utf8_encode']
1852
self._utf8_encode = codecs.getencoder('utf8')
1854
def top_prefix_to_starting_dir(self, top, prefix=""):
1855
"""See DirReader.top_prefix_to_starting_dir."""
1856
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1858
def read_dir(self, prefix, top):
1859
"""Read a single directory from a non-utf8 file system.
1861
top, and the abspath element in the output are unicode, all other paths
1862
are utf8. Local disk IO is done via unicode calls to listdir etc.
1864
This is currently the fallback code path when the filesystem encoding is
1865
not UTF-8. It may be better to implement an alternative so that we can
1866
safely handle paths that are not properly decodable in the current
1869
See DirReader.read_dir for details.
1871
_utf8_encode = self._utf8_encode
1873
_listdir = os.listdir
1874
_kind_from_mode = file_kind_from_stat_mode
1877
relprefix = prefix + '/'
1192
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1195
def _walkdirs_unicode_to_utf8(top, prefix=""):
1196
"""See _walkdirs_utf8
1198
Because Win32 has a Unicode api, all of the 'path-from-top' entries will be
1200
This is currently the fallback code path when the filesystem encoding is
1201
not UTF-8. It may be better to implement an alternative so that we can
1202
safely handle paths that are not properly decodable in the current
1205
_utf8_encode = codecs.getencoder('utf8')
1207
_directory = _directory_kind
1208
_listdir = os.listdir
1209
_kind_from_mode = _formats.get
1211
pending = [(safe_utf8(prefix), None, None, None, safe_unicode(top))]
1213
relroot, _, _, _, top = pending.pop()
1215
relprefix = relroot + '/'
1880
1218
top_slash = top + u'/'
2052
1352
return user_encoding
2055
def get_diff_header_encoding():
2056
return get_terminal_encoding()
2059
_message_encoding = None
2062
def get_message_encoding():
2063
"""Return the encoding used for messages
2065
While the message encoding is a general setting it should usually only be
2066
needed for decoding system error strings such as from OSError instances.
2068
global _message_encoding
2069
if _message_encoding is None:
2070
if os.name == "posix":
2072
# This is a process-global setting that can change, but should in
2073
# general just get set once at process startup then be constant.
2074
_message_encoding = locale.getlocale(locale.LC_MESSAGES)[1]
2076
# On windows want the result of GetACP() which this boils down to.
2077
_message_encoding = get_user_encoding()
2078
return _message_encoding or "ascii"
2081
def get_host_name():
2082
"""Return the current unicode host name.
2084
This is meant to be used in place of socket.gethostname() because that
2085
behaves inconsistently on different platforms.
2087
if sys.platform == "win32":
2089
return win32utils.get_host_name()
2092
return socket.gethostname().decode(get_user_encoding())
2095
# We must not read/write any more than 64k at a time from/to a socket so we
2096
# don't risk "no buffer space available" errors on some platforms. Windows in
2097
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2099
MAX_SOCKET_CHUNK = 64 * 1024
2101
_end_of_stream_errors = [errno.ECONNRESET]
2102
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2103
_eno = getattr(errno, _eno, None)
2104
if _eno is not None:
2105
_end_of_stream_errors.append(_eno)
2109
def read_bytes_from_socket(sock, report_activity=None,
2110
max_read_size=MAX_SOCKET_CHUNK):
2111
"""Read up to max_read_size of bytes from sock and notify of progress.
2113
Translates "Connection reset by peer" into file-like EOF (return an
2114
empty string rather than raise an error), and repeats the recv if
2115
interrupted by a signal.
2119
bytes = sock.recv(max_read_size)
2120
except socket.error, e:
2122
if eno in _end_of_stream_errors:
2123
# The connection was closed by the other side. Callers expect
2124
# an empty string to signal end-of-stream.
2126
elif eno == errno.EINTR:
2127
# Retry the interrupted recv.
2131
if report_activity is not None:
2132
report_activity(len(bytes), 'read')
2136
def recv_all(socket, count):
1355
def recv_all(socket, bytes):
2137
1356
"""Receive an exact number of bytes.
2139
1358
Regular Socket.recv() may return less than the requested number of bytes,
2140
depending on what's in the OS buffer. MSG_WAITALL is not available
1359
dependning on what's in the OS buffer. MSG_WAITALL is not available
2141
1360
on all platforms, but this should work everywhere. This will return
2142
1361
less than the requested amount if the remote end closes.
2144
1363
This isn't optimized and is intended mostly for use in testing.
2147
while len(b) < count:
2148
new = read_bytes_from_socket(socket, None, count - len(b))
1366
while len(b) < bytes:
1367
new = socket.recv(bytes - len(b))
2155
def send_all(sock, bytes, report_activity=None):
2156
"""Send all bytes on a socket.
2158
Breaks large blocks in smaller chunks to avoid buffering limitations on
2159
some platforms, and catches EINTR which may be thrown if the send is
2160
interrupted by a signal.
2162
This is preferred to socket.sendall(), because it avoids portability bugs
2163
and provides activity reporting.
2165
:param report_activity: Call this as bytes are read, see
2166
Transport._report_activity
2169
byte_count = len(bytes)
2170
while sent_total < byte_count:
2172
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2173
except socket.error, e:
2174
if e.args[0] != errno.EINTR:
2178
report_activity(sent, 'write')
2181
def connect_socket(address):
2182
# Slight variation of the socket.create_connection() function (provided by
2183
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2184
# provide it for previous python versions. Also, we don't use the timeout
2185
# parameter (provided by the python implementation) so we don't implement
2187
err = socket.error('getaddrinfo returns an empty list')
2188
host, port = address
2189
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2190
af, socktype, proto, canonname, sa = res
2193
sock = socket.socket(af, socktype, proto)
2197
except socket.error, err:
2198
# 'err' is now the most recent error
2199
if sock is not None:
2204
1373
def dereference_path(path):
2205
1374
"""Determine the real path to a file.
2213
1382
# The pathjoin for '.' is a workaround for Python bug #1213894.
2214
1383
# (initial path components aren't dereferenced)
2215
1384
return pathjoin(realpath(pathjoin('.', parent)), base)
2218
def supports_mapi():
2219
"""Return True if we can use MAPI to launch a mail client."""
2220
return sys.platform == "win32"
2223
def resource_string(package, resource_name):
2224
"""Load a resource from a package and return it as a string.
2226
Note: Only packages that start with bzrlib are currently supported.
2228
This is designed to be a lightweight implementation of resource
2229
loading in a way which is API compatible with the same API from
2231
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2232
If and when pkg_resources becomes a standard library, this routine
2235
# Check package name is within bzrlib
2236
if package == "bzrlib":
2237
resource_relpath = resource_name
2238
elif package.startswith("bzrlib."):
2239
package = package[len("bzrlib."):].replace('.', os.sep)
2240
resource_relpath = pathjoin(package, resource_name)
2242
raise errors.BzrError('resource package %s not in bzrlib' % package)
2244
# Map the resource to a file and read its contents
2245
base = dirname(bzrlib.__file__)
2246
if getattr(sys, 'frozen', None): # bzr.exe
2247
base = abspath(pathjoin(base, '..', '..'))
2248
f = file(pathjoin(base, resource_relpath), "rU")
2254
def file_kind_from_stat_mode_thunk(mode):
2255
global file_kind_from_stat_mode
2256
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2258
from bzrlib._readdir_pyx import UTF8DirReader
2259
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2260
except ImportError, e:
2261
# This is one time where we won't warn that an extension failed to
2262
# load. The extension is never available on Windows anyway.
2263
from bzrlib._readdir_py import (
2264
_kind_from_mode as file_kind_from_stat_mode
2266
return file_kind_from_stat_mode(mode)
2267
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2269
def file_stat(f, _lstat=os.lstat):
2274
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2275
raise errors.NoSuchFile(f)
2278
def file_kind(f, _lstat=os.lstat):
2279
stat_value = file_stat(f, _lstat)
2280
return file_kind_from_stat_mode(stat_value.st_mode)
2282
def until_no_eintr(f, *a, **kw):
2283
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2285
WARNING: you must be certain that it is safe to retry the call repeatedly
2286
if EINTR does occur. This is typically only true for low-level operations
2287
like os.read. If in any doubt, don't use this.
2289
Keep in mind that this is not a complete solution to EINTR. There is
2290
probably code in the Python standard library and other dependencies that
2291
may encounter EINTR if a signal arrives (and there is signal handler for
2292
that signal). So this function can reduce the impact for IO that bzrlib
2293
directly controls, but it is not a complete solution.
2295
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2299
except (IOError, OSError), e:
2300
if e.errno == errno.EINTR:
2305
@deprecated_function(deprecated_in((2, 2, 0)))
2306
def re_compile_checked(re_string, flags=0, where=""):
2307
"""Return a compiled re, or raise a sensible error.
2309
This should only be used when compiling user-supplied REs.
2311
:param re_string: Text form of regular expression.
2312
:param flags: eg re.IGNORECASE
2313
:param where: Message explaining to the user the context where
2314
it occurred, eg 'log search filter'.
2316
# from https://bugs.launchpad.net/bzr/+bug/251352
2318
re_obj = re.compile(re_string, flags)
2321
except errors.InvalidPattern, e:
2323
where = ' in ' + where
2324
# despite the name 'error' is a type
2325
raise errors.BzrCommandError('Invalid regular expression%s: %s'
2329
if sys.platform == "win32":
2332
return msvcrt.getch()
2337
fd = sys.stdin.fileno()
2338
settings = termios.tcgetattr(fd)
2341
ch = sys.stdin.read(1)
2343
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2346
if sys.platform.startswith('linux'):
2347
def _local_concurrency():
2349
return os.sysconf('SC_NPROCESSORS_ONLN')
2350
except (ValueError, OSError, AttributeError):
2352
elif sys.platform == 'darwin':
2353
def _local_concurrency():
2354
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2355
stdout=subprocess.PIPE).communicate()[0]
2356
elif "bsd" in sys.platform:
2357
def _local_concurrency():
2358
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2359
stdout=subprocess.PIPE).communicate()[0]
2360
elif sys.platform == 'sunos5':
2361
def _local_concurrency():
2362
return subprocess.Popen(['psrinfo', '-p',],
2363
stdout=subprocess.PIPE).communicate()[0]
2364
elif sys.platform == "win32":
2365
def _local_concurrency():
2366
# This appears to return the number of cores.
2367
return os.environ.get('NUMBER_OF_PROCESSORS')
2369
def _local_concurrency():
2374
_cached_local_concurrency = None
2376
def local_concurrency(use_cache=True):
2377
"""Return how many processes can be run concurrently.
2379
Rely on platform specific implementations and default to 1 (one) if
2380
anything goes wrong.
2382
global _cached_local_concurrency
2384
if _cached_local_concurrency is not None and use_cache:
2385
return _cached_local_concurrency
2387
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2388
if concurrency is None:
2390
import multiprocessing
2391
concurrency = multiprocessing.cpu_count()
2392
except (ImportError, NotImplementedError):
2393
# multiprocessing is only available on Python >= 2.6
2394
# and multiprocessing.cpu_count() isn't implemented on all
2397
concurrency = _local_concurrency()
2398
except (OSError, IOError):
2401
concurrency = int(concurrency)
2402
except (TypeError, ValueError):
2405
_cached_concurrency = concurrency
2409
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2410
"""A stream writer that doesn't decode str arguments."""
2412
def __init__(self, encode, stream, errors='strict'):
2413
codecs.StreamWriter.__init__(self, stream, errors)
2414
self.encode = encode
2416
def write(self, object):
2417
if type(object) is str:
2418
self.stream.write(object)
2420
data, _ = self.encode(object, self.errors)
2421
self.stream.write(data)
2423
if sys.platform == 'win32':
2424
def open_file(filename, mode='r', bufsize=-1):
2425
"""This function is used to override the ``open`` builtin.
2427
But it uses O_NOINHERIT flag so the file handle is not inherited by
2428
child processes. Deleting or renaming a closed file opened with this
2429
function is not blocking child processes.
2431
writing = 'w' in mode
2432
appending = 'a' in mode
2433
updating = '+' in mode
2434
binary = 'b' in mode
2437
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2438
# for flags for each modes.
2448
flags |= os.O_WRONLY
2449
flags |= os.O_CREAT | os.O_TRUNC
2454
flags |= os.O_WRONLY
2455
flags |= os.O_CREAT | os.O_APPEND
2460
flags |= os.O_RDONLY
2462
return os.fdopen(os.open(filename, flags), mode, bufsize)
2467
def available_backup_name(base, exists):
2468
"""Find a non-existing backup file name.
2470
This will *not* create anything, this only return a 'free' entry. This
2471
should be used for checking names in a directory below a locked
2472
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2473
Leap) and generally discouraged.
2475
:param base: The base name.
2477
:param exists: A callable returning True if the path parameter exists.
2480
name = "%s.~%d~" % (base, counter)
2483
name = "%s.~%d~" % (base, counter)
2487
def set_fd_cloexec(fd):
2488
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2489
support for this is not available.
2493
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2494
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2495
except (ImportError, AttributeError):
2496
# Either the fcntl module or specific constants are not present
2500
def find_executable_on_path(name):
2501
"""Finds an executable on the PATH.
2503
On Windows, this will try to append each extension in the PATHEXT
2504
environment variable to the name, if it cannot be found with the name
2507
:param name: The base name of the executable.
2508
:return: The path to the executable found or None.
2510
path = os.environ.get('PATH')
2513
path = path.split(os.pathsep)
2514
if sys.platform == 'win32':
2515
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2516
exts = [ext.lower() for ext in exts]
2517
base, ext = os.path.splitext(name)
2519
if ext.lower() not in exts:
2527
f = os.path.join(d, name) + ext
2528
if os.access(f, os.X_OK):
2533
def _posix_is_local_pid_dead(pid):
2534
"""True if pid doesn't correspond to live process on this machine"""
2536
# Special meaning of unix kill: just check if it's there.
2539
if e.errno == errno.ESRCH:
2540
# On this machine, and really not found: as sure as we can be
2543
elif e.errno == errno.EPERM:
2544
# exists, though not ours
2547
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2548
# Don't really know.
2551
# Exists and our process: not dead.
2554
if sys.platform == "win32":
2555
is_local_pid_dead = win32utils.is_local_pid_dead
2557
is_local_pid_dead = _posix_is_local_pid_dead
2560
def fdatasync(fileno):
2561
"""Flush file contents to disk if possible.
2563
:param fileno: Integer OS file handle.
2564
:raises TransportNotPossible: If flushing to disk is not possible.
2566
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2571
def ensure_empty_directory_exists(path, exception_class):
2572
"""Make sure a local directory exists and is empty.
2574
If it does not exist, it is created. If it exists and is not empty, an
2575
instance of exception_class is raised.
2580
if e.errno != errno.EEXIST:
2582
if os.listdir(path) != []:
2583
raise exception_class(path)
2586
def is_environment_error(evalue):
2587
"""True if exception instance is due to a process environment issue
2589
This includes OSError and IOError, but also other errors that come from
2590
the operating system or core libraries but are not subclasses of those.
2592
if isinstance(evalue, (EnvironmentError, select.error)):
2594
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
