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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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# 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
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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
83
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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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os.chmod(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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os.chmod(filename, mod)
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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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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)
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f = win32utils.get_unicode_argv # special function or None
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elif sys.platform == 'darwin':
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getcwd = _mac_getcwd
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def get_terminal_encoding(trace=False):
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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
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osutils.get_user_encoding().
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bzrlib.user_encoding.
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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
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On my standard US Windows XP, the preferred encoding is
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cp1252, but the console is cp437
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:param trace: If True trace the selected encoding via mutter().
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from bzrlib.trace import mutter
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output_encoding = getattr(sys.stdout, 'encoding', None)
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if not output_encoding:
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input_encoding = getattr(sys.stdin, 'encoding', None)
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if not input_encoding:
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output_encoding = get_user_encoding()
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mutter('encoding stdout as osutils.get_user_encoding() %r',
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output_encoding = bzrlib.user_encoding
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mutter('encoding stdout as bzrlib.user_encoding %r', output_encoding)
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output_encoding = input_encoding
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mutter('encoding stdout as sys.stdin encoding %r',
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mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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if output_encoding == 'cp0':
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# invalid encoding (cp0 means 'no codepage' on Windows)
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output_encoding = get_user_encoding()
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mutter('cp0 is invalid encoding.'
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' encoding stdout as osutils.get_user_encoding() %r',
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output_encoding = bzrlib.user_encoding
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mutter('cp0 is invalid encoding.'
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' encoding stdout as bzrlib.user_encoding %r', output_encoding)
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codecs.lookup(output_encoding)
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for dirname in dir_list:
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if is_inside(dirname, fname) or is_inside(fname, dirname):
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def pumpfile(from_file, to_file, read_length=-1, buff_size=32768,
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report_activity=None, direction='read'):
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"""Copy contents of one file to another.
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The read_length can either be -1 to read to end-of-file (EOF) or
581
it can specify the maximum number of bytes to read.
583
The buff_size represents the maximum size for each read operation
584
performed on from_file.
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:param report_activity: Call this as bytes are read, see
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Transport._report_activity
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:param direction: Will be passed to report_activity
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:return: The number of bytes copied.
594
# read specified number of bytes
596
while read_length > 0:
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num_bytes_to_read = min(read_length, buff_size)
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block = from_file.read(num_bytes_to_read)
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if report_activity is not None:
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report_activity(len(block), direction)
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actual_bytes_read = len(block)
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read_length -= actual_bytes_read
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length += actual_bytes_read
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block = from_file.read(buff_size)
617
if report_activity is not None:
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report_activity(len(block), direction)
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def pump_string_file(bytes, file_handle, segment_size=None):
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"""Write bytes to file_handle in many smaller writes.
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:param bytes: The string to write.
628
:param file_handle: The file to write to.
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# Write data in chunks rather than all at once, because very large
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# writes fail on some platforms (e.g. Windows with SMB mounted
634
segment_size = 5242880 # 5MB
635
segments = range(len(bytes) / segment_size + 1)
636
write = file_handle.write
637
for segment_index in segments:
638
segment = buffer(bytes, segment_index * segment_size, segment_size)
534
def pumpfile(fromfile, tofile):
535
"""Copy contents of one file to another."""
538
b = fromfile.read(BUFSIZE)
642
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def file_iterator(input_file, readsize=32768):
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offset = datetime.fromtimestamp(t) - datetime.utcfromtimestamp(t)
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return offset.days * 86400 + offset.seconds
733
weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
734
_default_format_by_weekday_num = [wd + " %Y-%m-%d %H:%M:%S" for wd in weekdays]
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def format_date(t, offset=0, timezone='original', date_fmt=None,
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def format_date(t, offset=0, timezone='original', date_fmt=None,
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show_offset=True):
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"""Return a formatted date string.
741
:param t: Seconds since the epoch.
742
:param offset: Timezone offset in seconds east of utc.
743
:param timezone: How to display the time: 'utc', 'original' for the
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timezone specified by offset, or 'local' for the process's current
746
:param date_fmt: strftime format.
747
:param show_offset: Whether to append the timezone.
749
(date_fmt, tt, offset_str) = \
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_format_date(t, offset, timezone, date_fmt, show_offset)
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date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
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date_str = time.strftime(date_fmt, tt)
753
return date_str + offset_str
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# Cache of formatted offset strings
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def format_date_with_offset_in_original_timezone(t, offset=0,
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_cache=_offset_cache):
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"""Return a formatted date string in the original timezone.
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This routine may be faster then format_date.
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:param t: Seconds since the epoch.
767
:param offset: Timezone offset in seconds east of utc.
771
tt = time.gmtime(t + offset)
772
date_fmt = _default_format_by_weekday_num[tt[6]]
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date_str = time.strftime(date_fmt, tt)
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offset_str = _cache.get(offset, None)
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if offset_str is None:
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offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
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_cache[offset] = offset_str
778
return date_str + offset_str
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def format_local_date(t, offset=0, timezone='original', date_fmt=None,
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"""Return an unicode date string formatted according to the current locale.
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:param t: Seconds since the epoch.
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:param offset: Timezone offset in seconds east of utc.
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:param timezone: How to display the time: 'utc', 'original' for the
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timezone specified by offset, or 'local' for the process's current
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:param date_fmt: strftime format.
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:param show_offset: Whether to append the timezone.
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(date_fmt, tt, offset_str) = \
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_format_date(t, offset, timezone, date_fmt, show_offset)
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date_str = time.strftime(date_fmt, tt)
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if not isinstance(date_str, unicode):
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date_str = date_str.decode(get_user_encoding(), 'replace')
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return date_str + offset_str
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def _format_date(t, offset, timezone, date_fmt, show_offset):
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## TODO: Perhaps a global option to use either universal or local time?
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## Or perhaps just let people set $TZ?
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assert isinstance(t, float)
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if timezone == 'utc':
803
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tt = time.gmtime(t)
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raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
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raise errors.BzrError("sorry, %r not allowed in path" % f)
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elif (f == '.') or (f == ''):
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assert isinstance(p, (list, tuple))
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if (f == '..') or (f is None) or (f == ''):
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raise errors.BzrError(gettext("sorry, %r not allowed in path") % f)
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raise errors.BzrError("sorry, %r not allowed in path" % f)
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return pathjoin(*p)
944
def parent_directories(filename):
945
"""Return the list of parent directories, deepest first.
947
For example, parent_directories("a/b/c") -> ["a/b", "a"].
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parts = splitpath(dirname(filename))
952
parents.append(joinpath(parts))
957
_extension_load_failures = []
960
def failed_to_load_extension(exception):
961
"""Handle failing to load a binary extension.
963
This should be called from the ImportError block guarding the attempt to
964
import the native extension. If this function returns, the pure-Python
965
implementation should be loaded instead::
968
>>> import bzrlib._fictional_extension_pyx
969
>>> except ImportError, e:
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>>> bzrlib.osutils.failed_to_load_extension(e)
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>>> import bzrlib._fictional_extension_py
973
# NB: This docstring is just an example, not a doctest, because doctest
974
# currently can't cope with the use of lazy imports in this namespace --
977
# This currently doesn't report the failure at the time it occurs, because
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# they tend to happen very early in startup when we can't check config
979
# files etc, and also we want to report all failures but not spam the user
981
exception_str = str(exception)
982
if exception_str not in _extension_load_failures:
983
trace.mutter("failed to load compiled extension: %s" % exception_str)
984
_extension_load_failures.append(exception_str)
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def report_extension_load_failures():
988
if not _extension_load_failures:
990
if config.GlobalStack().get('ignore_missing_extensions'):
992
# the warnings framework should by default show this only once
993
from bzrlib.trace import warning
995
"bzr: warning: some compiled extensions could not be loaded; "
996
"see <https://answers.launchpad.net/bzr/+faq/703>")
997
# we no longer show the specific missing extensions here, because it makes
998
# the message too long and scary - see
999
# https://bugs.launchpad.net/bzr/+bug/430529
1003
from bzrlib._chunks_to_lines_pyx import chunks_to_lines
1004
except ImportError, e:
1005
failed_to_load_extension(e)
1006
from bzrlib._chunks_to_lines_py import chunks_to_lines
759
@deprecated_function(zero_nine)
760
def appendpath(p1, p2):
764
return pathjoin(p1, p2)
1009
767
def split_lines(s):
1010
768
"""Split s into lines, but without removing the newline characters."""
1011
# Trivially convert a fulltext into a 'chunked' representation, and let
1012
# chunks_to_lines do the heavy lifting.
1013
if isinstance(s, str):
1014
# chunks_to_lines only supports 8-bit strings
1015
return chunks_to_lines([s])
1017
return _split_lines(s)
1020
def _split_lines(s):
1021
"""Split s into lines, but without removing the newline characters.
1023
This supports Unicode or plain string objects.
1025
769
lines = s.split('\n')
1026
770
result = [line + '\n' for line in lines[:-1]]
1148
845
os.path.commonprefix (python2.4) has a bad bug that it works just
1149
846
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
1150
847
avoids that problem.
1152
NOTE: `base` should not have a trailing slash otherwise you'll get
1153
PathNotChild exceptions regardless of `path`.
1156
if len(base) < MIN_ABS_PATHLENGTH:
1157
# must have space for e.g. a drive letter
1158
raise ValueError(gettext('%r is too short to calculate a relative path')
850
assert len(base) >= MIN_ABS_PATHLENGTH, ('Length of base must be equal or'
851
' exceed the platform minimum length (which is %d)' %
1161
854
rp = abspath(path)
1166
if len(head) <= len(base) and head != base:
1167
raise errors.PathNotChild(rp, base)
858
while len(head) >= len(base):
1168
859
if head == base:
1170
head, tail = split(head)
861
head, tail = os.path.split(head)
865
raise errors.PathNotChild(rp, base)
1175
return pathjoin(*reversed(s))
1180
def _cicp_canonical_relpath(base, path):
1181
"""Return the canonical path relative to base.
1183
Like relpath, but on case-insensitive-case-preserving file-systems, this
1184
will return the relpath as stored on the file-system rather than in the
1185
case specified in the input string, for all existing portions of the path.
1187
This will cause O(N) behaviour if called for every path in a tree; if you
1188
have a number of paths to convert, you should use canonical_relpaths().
1190
# TODO: it should be possible to optimize this for Windows by using the
1191
# win32 API FindFiles function to look for the specified name - but using
1192
# os.listdir() still gives us the correct, platform agnostic semantics in
1195
rel = relpath(base, path)
1196
# '.' will have been turned into ''
1200
abs_base = abspath(base)
1202
_listdir = os.listdir
1204
# use an explicit iterator so we can easily consume the rest on early exit.
1205
bit_iter = iter(rel.split('/'))
1206
for bit in bit_iter:
1209
next_entries = _listdir(current)
1210
except OSError: # enoent, eperm, etc
1211
# We can't find this in the filesystem, so just append the
1213
current = pathjoin(current, bit, *list(bit_iter))
1215
for look in next_entries:
1216
if lbit == look.lower():
1217
current = pathjoin(current, look)
1220
# got to the end, nothing matched, so we just return the
1221
# non-existing bits as they were specified (the filename may be
1222
# the target of a move, for example).
1223
current = pathjoin(current, bit, *list(bit_iter))
1225
return current[len(abs_base):].lstrip('/')
1227
# XXX - TODO - we need better detection/integration of case-insensitive
1228
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1229
# filesystems), for example, so could probably benefit from the same basic
1230
# support there. For now though, only Windows and OSX get that support, and
1231
# they get it for *all* file-systems!
1232
if sys.platform in ('win32', 'darwin'):
1233
canonical_relpath = _cicp_canonical_relpath
1235
canonical_relpath = relpath
1237
def canonical_relpaths(base, paths):
1238
"""Create an iterable to canonicalize a sequence of relative paths.
1240
The intent is for this implementation to use a cache, vastly speeding
1241
up multiple transformations in the same directory.
1243
# but for now, we haven't optimized...
1244
return [canonical_relpath(base, p) for p in paths]
1247
def decode_filename(filename):
1248
"""Decode the filename using the filesystem encoding
1250
If it is unicode, it is returned.
1251
Otherwise it is decoded from the the filesystem's encoding. If decoding
1252
fails, a errors.BadFilenameEncoding exception is raised.
1254
if type(filename) is unicode:
1257
return filename.decode(_fs_enc)
1258
except UnicodeDecodeError:
1259
raise errors.BadFilenameEncoding(filename, _fs_enc)
1262
873
def safe_unicode(unicode_or_utf8_string):
1263
874
"""Coerce unicode_or_utf8_string into unicode.
1265
876
If it is unicode, it is returned.
1266
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1267
wrapped in a BzrBadParameterNotUnicode exception.
877
Otherwise it is decoded from utf-8. If a decoding error
878
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
879
as a BzrBadParameter exception.
1269
881
if isinstance(unicode_or_utf8_string, unicode):
1270
882
return unicode_or_utf8_string
1383
995
normalized_filename = _inaccessible_normalized_filename
1386
def set_signal_handler(signum, handler, restart_syscall=True):
1387
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1388
on platforms that support that.
1390
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1391
automatically restart (by calling `signal.siginterrupt(signum,
1392
False)`). May be ignored if the feature is not available on this
1393
platform or Python version.
1397
siginterrupt = signal.siginterrupt
1399
# This python implementation doesn't provide signal support, hence no
1402
except AttributeError:
1403
# siginterrupt doesn't exist on this platform, or for this version
1405
siginterrupt = lambda signum, flag: None
1407
def sig_handler(*args):
1408
# Python resets the siginterrupt flag when a signal is
1409
# received. <http://bugs.python.org/issue8354>
1410
# As a workaround for some cases, set it back the way we want it.
1411
siginterrupt(signum, False)
1412
# Now run the handler function passed to set_signal_handler.
1415
sig_handler = handler
1416
old_handler = signal.signal(signum, sig_handler)
1418
siginterrupt(signum, False)
1422
default_terminal_width = 80
1423
"""The default terminal width for ttys.
1425
This is defined so that higher levels can share a common fallback value when
1426
terminal_width() returns None.
1429
# Keep some state so that terminal_width can detect if _terminal_size has
1430
# returned a different size since the process started. See docstring and
1431
# comments of terminal_width for details.
1432
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1433
_terminal_size_state = 'no_data'
1434
_first_terminal_size = None
1436
998
def terminal_width():
1437
"""Return terminal width.
1439
None is returned if the width can't established precisely.
1442
- if BZR_COLUMNS is set, returns its value
1443
- if there is no controlling terminal, returns None
1444
- query the OS, if the queried size has changed since the last query,
1446
- if COLUMNS is set, returns its value,
1447
- if the OS has a value (even though it's never changed), return its value.
1449
From there, we need to query the OS to get the size of the controlling
1452
On Unices we query the OS by:
1453
- get termios.TIOCGWINSZ
1454
- if an error occurs or a negative value is obtained, returns None
1456
On Windows we query the OS by:
1457
- win32utils.get_console_size() decides,
1458
- returns None on error (provided default value)
1460
# Note to implementors: if changing the rules for determining the width,
1461
# make sure you've considered the behaviour in these cases:
1462
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1463
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1465
# - (add more interesting cases here, if you find any)
1466
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1467
# but we don't want to register a signal handler because it is impossible
1468
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1469
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1470
# time so we can notice if the reported size has changed, which should have
1473
# If BZR_COLUMNS is set, take it, user is always right
1474
# Except if they specified 0 in which case, impose no limit here
1476
width = int(os.environ['BZR_COLUMNS'])
1477
except (KeyError, ValueError):
1479
if width is not None:
1485
isatty = getattr(sys.stdout, 'isatty', None)
1486
if isatty is None or not isatty():
1487
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1491
width, height = os_size = _terminal_size(None, None)
1492
global _first_terminal_size, _terminal_size_state
1493
if _terminal_size_state == 'no_data':
1494
_first_terminal_size = os_size
1495
_terminal_size_state = 'unchanged'
1496
elif (_terminal_size_state == 'unchanged' and
1497
_first_terminal_size != os_size):
1498
_terminal_size_state = 'changed'
1500
# If the OS claims to know how wide the terminal is, and this value has
1501
# ever changed, use that.
1502
if _terminal_size_state == 'changed':
1503
if width is not None and width > 0:
1506
# If COLUMNS is set, use it.
1508
return int(os.environ['COLUMNS'])
1509
except (KeyError, ValueError):
1512
# Finally, use an unchanged size from the OS, if we have one.
1513
if _terminal_size_state == 'unchanged':
1514
if width is not None and width > 0:
1517
# The width could not be determined.
1521
def _win32_terminal_size(width, height):
1522
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1523
return width, height
1526
def _ioctl_terminal_size(width, height):
999
"""Return estimated terminal width."""
1000
if sys.platform == 'win32':
1001
return win32utils.get_console_size()[0]
1528
1004
import struct, fcntl, termios
1529
1005
s = struct.pack('HHHH', 0, 0, 0, 0)
1530
1006
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
1531
height, width = struct.unpack('HHHH', x)[0:2]
1532
except (IOError, AttributeError):
1007
width = struct.unpack('HHHH', x)[1]
1534
return width, height
1536
_terminal_size = None
1537
"""Returns the terminal size as (width, height).
1539
:param width: Default value for width.
1540
:param height: Default value for height.
1542
This is defined specifically for each OS and query the size of the controlling
1543
terminal. If any error occurs, the provided default values should be returned.
1545
if sys.platform == 'win32':
1546
_terminal_size = _win32_terminal_size
1548
_terminal_size = _ioctl_terminal_size
1012
width = int(os.environ['COLUMNS'])
1551
1021
def supports_executable():
1598
1068
raise errors.IllegalPath(path)
1601
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1603
def _is_error_enotdir(e):
1604
"""Check if this exception represents ENOTDIR.
1606
Unfortunately, python is very inconsistent about the exception
1607
here. The cases are:
1608
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1609
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1610
which is the windows error code.
1611
3) Windows, Python2.5 uses errno == EINVAL and
1612
winerror == ERROR_DIRECTORY
1614
:param e: An Exception object (expected to be OSError with an errno
1615
attribute, but we should be able to cope with anything)
1616
:return: True if this represents an ENOTDIR error. False otherwise.
1618
en = getattr(e, 'errno', None)
1619
if (en == errno.ENOTDIR
1620
or (sys.platform == 'win32'
1621
and (en == _WIN32_ERROR_DIRECTORY
1622
or (en == errno.EINVAL
1623
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
1629
1071
def walkdirs(top, prefix=""):
1630
1072
"""Yield data about all the directories in a tree.
1632
1074
This yields all the data about the contents of a directory at a time.
1633
1075
After each directory has been yielded, if the caller has mutated the list
1634
1076
to exclude some directories, they are then not descended into.
1636
1078
The data yielded is of the form:
1637
1079
((directory-relpath, directory-path-from-top),
1638
[(relpath, basename, kind, lstat, path-from-top), ...]),
1080
[(directory-relpath, basename, kind, lstat, path-from-top), ...]),
1639
1081
- directory-relpath is the relative path of the directory being returned
1640
1082
with respect to top. prefix is prepended to this.
1641
- directory-path-from-root is the path including top for this directory.
1083
- directory-path-from-root is the path including top for this directory.
1642
1084
It is suitable for use with os functions.
1643
1085
- relpath is the relative path within the subtree being walked.
1644
1086
- basename is the basename of the path
1734
1142
path-from-top might be unicode or utf8, but it is the correct path to
1735
1143
pass to os functions to affect the file in question. (such as os.lstat)
1737
global _selected_dir_reader
1738
if _selected_dir_reader is None:
1739
fs_encoding = _fs_enc.upper()
1740
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1741
# Win98 doesn't have unicode apis like FindFirstFileW
1742
# TODO: We possibly could support Win98 by falling back to the
1743
# original FindFirstFile, and using TCHAR instead of WCHAR,
1744
# but that gets a bit tricky, and requires custom compiling
1747
from bzrlib._walkdirs_win32 import Win32ReadDir
1748
_selected_dir_reader = Win32ReadDir()
1751
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1752
# ANSI_X3.4-1968 is a form of ASCII
1754
from bzrlib._readdir_pyx import UTF8DirReader
1755
_selected_dir_reader = UTF8DirReader()
1756
except ImportError, e:
1757
failed_to_load_extension(e)
1760
if _selected_dir_reader is None:
1761
# Fallback to the python version
1762
_selected_dir_reader = UnicodeDirReader()
1145
fs_encoding = sys.getfilesystemencoding()
1146
if (sys.platform == 'win32' or
1147
fs_encoding not in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968')): # ascii
1148
return _walkdirs_unicode_to_utf8(top, prefix=prefix)
1150
return _walkdirs_fs_utf8(top, prefix=prefix)
1153
def _walkdirs_fs_utf8(top, prefix=""):
1154
"""See _walkdirs_utf8.
1156
This sub-function is called when we know the filesystem is already in utf8
1157
encoding. So we don't need to transcode filenames.
1160
_directory = _directory_kind
1161
_listdir = os.listdir
1162
_kind_from_mode = _formats.get
1764
1164
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1765
1165
# But we don't actually uses 1-3 in pending, so set them to None
1766
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1767
read_dir = _selected_dir_reader.read_dir
1768
_directory = _directory_kind
1166
pending = [(safe_utf8(prefix), None, None, None, safe_utf8(top))]
1770
relroot, _, _, _, top = pending[-1].pop()
1773
dirblock = sorted(read_dir(relroot, top))
1168
relroot, _, _, _, top = pending.pop()
1170
relprefix = relroot + '/'
1173
top_slash = top + '/'
1176
append = dirblock.append
1177
for name in sorted(_listdir(top)):
1178
abspath = top_slash + name
1179
statvalue = _lstat(abspath)
1180
kind = _kind_from_mode(statvalue.st_mode & 0170000, 'unknown')
1181
append((relprefix + name, name, kind, statvalue, abspath))
1774
1182
yield (relroot, top), dirblock
1775
1184
# push the user specified dirs from dirblock
1776
next = [d for d in reversed(dirblock) if d[2] == _directory]
1778
pending.append(next)
1781
class UnicodeDirReader(DirReader):
1782
"""A dir reader for non-utf8 file systems, which transcodes."""
1784
__slots__ = ['_utf8_encode']
1787
self._utf8_encode = codecs.getencoder('utf8')
1789
def top_prefix_to_starting_dir(self, top, prefix=""):
1790
"""See DirReader.top_prefix_to_starting_dir."""
1791
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1793
def read_dir(self, prefix, top):
1794
"""Read a single directory from a non-utf8 file system.
1796
top, and the abspath element in the output are unicode, all other paths
1797
are utf8. Local disk IO is done via unicode calls to listdir etc.
1799
This is currently the fallback code path when the filesystem encoding is
1800
not UTF-8. It may be better to implement an alternative so that we can
1801
safely handle paths that are not properly decodable in the current
1804
See DirReader.read_dir for details.
1806
_utf8_encode = self._utf8_encode
1808
_listdir = os.listdir
1809
_kind_from_mode = file_kind_from_stat_mode
1812
relprefix = prefix + '/'
1185
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1188
def _walkdirs_unicode_to_utf8(top, prefix=""):
1189
"""See _walkdirs_utf8
1191
Because Win32 has a Unicode api, all of the 'path-from-top' entries will be
1193
This is currently the fallback code path when the filesystem encoding is
1194
not UTF-8. It may be better to implement an alternative so that we can
1195
safely handle paths that are not properly decodable in the current
1198
_utf8_encode = codecs.getencoder('utf8')
1200
_directory = _directory_kind
1201
_listdir = os.listdir
1202
_kind_from_mode = _formats.get
1204
pending = [(safe_utf8(prefix), None, None, None, safe_unicode(top))]
1206
relroot, _, _, _, top = pending.pop()
1208
relprefix = relroot + '/'
1815
1211
top_slash = top + u'/'
1987
1345
return user_encoding
1990
def get_diff_header_encoding():
1991
return get_terminal_encoding()
1994
def get_host_name():
1995
"""Return the current unicode host name.
1997
This is meant to be used in place of socket.gethostname() because that
1998
behaves inconsistently on different platforms.
2000
if sys.platform == "win32":
2002
return win32utils.get_host_name()
2005
return socket.gethostname().decode(get_user_encoding())
2008
# We must not read/write any more than 64k at a time from/to a socket so we
2009
# don't risk "no buffer space available" errors on some platforms. Windows in
2010
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2012
MAX_SOCKET_CHUNK = 64 * 1024
2014
_end_of_stream_errors = [errno.ECONNRESET]
2015
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2016
_eno = getattr(errno, _eno, None)
2017
if _eno is not None:
2018
_end_of_stream_errors.append(_eno)
2022
def read_bytes_from_socket(sock, report_activity=None,
2023
max_read_size=MAX_SOCKET_CHUNK):
2024
"""Read up to max_read_size of bytes from sock and notify of progress.
2026
Translates "Connection reset by peer" into file-like EOF (return an
2027
empty string rather than raise an error), and repeats the recv if
2028
interrupted by a signal.
2032
bytes = sock.recv(max_read_size)
2033
except socket.error, e:
2035
if eno in _end_of_stream_errors:
2036
# The connection was closed by the other side. Callers expect
2037
# an empty string to signal end-of-stream.
2039
elif eno == errno.EINTR:
2040
# Retry the interrupted recv.
2044
if report_activity is not None:
2045
report_activity(len(bytes), 'read')
2049
def recv_all(socket, count):
1348
def recv_all(socket, bytes):
2050
1349
"""Receive an exact number of bytes.
2052
1351
Regular Socket.recv() may return less than the requested number of bytes,
2053
depending on what's in the OS buffer. MSG_WAITALL is not available
1352
dependning on what's in the OS buffer. MSG_WAITALL is not available
2054
1353
on all platforms, but this should work everywhere. This will return
2055
1354
less than the requested amount if the remote end closes.
2057
1356
This isn't optimized and is intended mostly for use in testing.
2060
while len(b) < count:
2061
new = read_bytes_from_socket(socket, None, count - len(b))
1359
while len(b) < bytes:
1360
new = socket.recv(bytes - len(b))
2068
def send_all(sock, bytes, report_activity=None):
2069
"""Send all bytes on a socket.
2071
Breaks large blocks in smaller chunks to avoid buffering limitations on
2072
some platforms, and catches EINTR which may be thrown if the send is
2073
interrupted by a signal.
2075
This is preferred to socket.sendall(), because it avoids portability bugs
2076
and provides activity reporting.
2078
:param report_activity: Call this as bytes are read, see
2079
Transport._report_activity
2082
byte_count = len(bytes)
2083
while sent_total < byte_count:
2085
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2086
except socket.error, e:
2087
if e.args[0] != errno.EINTR:
2091
report_activity(sent, 'write')
2094
def connect_socket(address):
2095
# Slight variation of the socket.create_connection() function (provided by
2096
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2097
# provide it for previous python versions. Also, we don't use the timeout
2098
# parameter (provided by the python implementation) so we don't implement
2100
err = socket.error('getaddrinfo returns an empty list')
2101
host, port = address
2102
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2103
af, socktype, proto, canonname, sa = res
2106
sock = socket.socket(af, socktype, proto)
2110
except socket.error, err:
2111
# 'err' is now the most recent error
2112
if sock is not None:
2117
1366
def dereference_path(path):
2118
1367
"""Determine the real path to a file.
2126
1375
# The pathjoin for '.' is a workaround for Python bug #1213894.
2127
1376
# (initial path components aren't dereferenced)
2128
1377
return pathjoin(realpath(pathjoin('.', parent)), base)
2131
def supports_mapi():
2132
"""Return True if we can use MAPI to launch a mail client."""
2133
return sys.platform == "win32"
2136
def resource_string(package, resource_name):
2137
"""Load a resource from a package and return it as a string.
2139
Note: Only packages that start with bzrlib are currently supported.
2141
This is designed to be a lightweight implementation of resource
2142
loading in a way which is API compatible with the same API from
2144
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2145
If and when pkg_resources becomes a standard library, this routine
2148
# Check package name is within bzrlib
2149
if package == "bzrlib":
2150
resource_relpath = resource_name
2151
elif package.startswith("bzrlib."):
2152
package = package[len("bzrlib."):].replace('.', os.sep)
2153
resource_relpath = pathjoin(package, resource_name)
2155
raise errors.BzrError('resource package %s not in bzrlib' % package)
2157
# Map the resource to a file and read its contents
2158
base = dirname(bzrlib.__file__)
2159
if getattr(sys, 'frozen', None): # bzr.exe
2160
base = abspath(pathjoin(base, '..', '..'))
2161
f = file(pathjoin(base, resource_relpath), "rU")
2167
def file_kind_from_stat_mode_thunk(mode):
2168
global file_kind_from_stat_mode
2169
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2171
from bzrlib._readdir_pyx import UTF8DirReader
2172
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2173
except ImportError, e:
2174
# This is one time where we won't warn that an extension failed to
2175
# load. The extension is never available on Windows anyway.
2176
from bzrlib._readdir_py import (
2177
_kind_from_mode as file_kind_from_stat_mode
2179
return file_kind_from_stat_mode(mode)
2180
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2182
def file_stat(f, _lstat=os.lstat):
2187
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2188
raise errors.NoSuchFile(f)
2191
def file_kind(f, _lstat=os.lstat):
2192
stat_value = file_stat(f, _lstat)
2193
return file_kind_from_stat_mode(stat_value.st_mode)
2195
def until_no_eintr(f, *a, **kw):
2196
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2198
WARNING: you must be certain that it is safe to retry the call repeatedly
2199
if EINTR does occur. This is typically only true for low-level operations
2200
like os.read. If in any doubt, don't use this.
2202
Keep in mind that this is not a complete solution to EINTR. There is
2203
probably code in the Python standard library and other dependencies that
2204
may encounter EINTR if a signal arrives (and there is signal handler for
2205
that signal). So this function can reduce the impact for IO that bzrlib
2206
directly controls, but it is not a complete solution.
2208
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2212
except (IOError, OSError), e:
2213
if e.errno == errno.EINTR:
2218
@deprecated_function(deprecated_in((2, 2, 0)))
2219
def re_compile_checked(re_string, flags=0, where=""):
2220
"""Return a compiled re, or raise a sensible error.
2222
This should only be used when compiling user-supplied REs.
2224
:param re_string: Text form of regular expression.
2225
:param flags: eg re.IGNORECASE
2226
:param where: Message explaining to the user the context where
2227
it occurred, eg 'log search filter'.
2229
# from https://bugs.launchpad.net/bzr/+bug/251352
2231
re_obj = re.compile(re_string, flags)
2234
except errors.InvalidPattern, e:
2236
where = ' in ' + where
2237
# despite the name 'error' is a type
2238
raise errors.BzrCommandError('Invalid regular expression%s: %s'
2242
if sys.platform == "win32":
2245
return msvcrt.getch()
2250
fd = sys.stdin.fileno()
2251
settings = termios.tcgetattr(fd)
2254
ch = sys.stdin.read(1)
2256
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2259
if sys.platform.startswith('linux'):
2260
def _local_concurrency():
2262
return os.sysconf('SC_NPROCESSORS_ONLN')
2263
except (ValueError, OSError, AttributeError):
2265
elif sys.platform == 'darwin':
2266
def _local_concurrency():
2267
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2268
stdout=subprocess.PIPE).communicate()[0]
2269
elif "bsd" in sys.platform:
2270
def _local_concurrency():
2271
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2272
stdout=subprocess.PIPE).communicate()[0]
2273
elif sys.platform == 'sunos5':
2274
def _local_concurrency():
2275
return subprocess.Popen(['psrinfo', '-p',],
2276
stdout=subprocess.PIPE).communicate()[0]
2277
elif sys.platform == "win32":
2278
def _local_concurrency():
2279
# This appears to return the number of cores.
2280
return os.environ.get('NUMBER_OF_PROCESSORS')
2282
def _local_concurrency():
2287
_cached_local_concurrency = None
2289
def local_concurrency(use_cache=True):
2290
"""Return how many processes can be run concurrently.
2292
Rely on platform specific implementations and default to 1 (one) if
2293
anything goes wrong.
2295
global _cached_local_concurrency
2297
if _cached_local_concurrency is not None and use_cache:
2298
return _cached_local_concurrency
2300
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2301
if concurrency is None:
2303
import multiprocessing
2305
# multiprocessing is only available on Python >= 2.6
2307
concurrency = _local_concurrency()
2308
except (OSError, IOError):
2311
concurrency = multiprocessing.cpu_count()
2313
concurrency = int(concurrency)
2314
except (TypeError, ValueError):
2317
_cached_concurrency = concurrency
2321
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2322
"""A stream writer that doesn't decode str arguments."""
2324
def __init__(self, encode, stream, errors='strict'):
2325
codecs.StreamWriter.__init__(self, stream, errors)
2326
self.encode = encode
2328
def write(self, object):
2329
if type(object) is str:
2330
self.stream.write(object)
2332
data, _ = self.encode(object, self.errors)
2333
self.stream.write(data)
2335
if sys.platform == 'win32':
2336
def open_file(filename, mode='r', bufsize=-1):
2337
"""This function is used to override the ``open`` builtin.
2339
But it uses O_NOINHERIT flag so the file handle is not inherited by
2340
child processes. Deleting or renaming a closed file opened with this
2341
function is not blocking child processes.
2343
writing = 'w' in mode
2344
appending = 'a' in mode
2345
updating = '+' in mode
2346
binary = 'b' in mode
2349
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2350
# for flags for each modes.
2360
flags |= os.O_WRONLY
2361
flags |= os.O_CREAT | os.O_TRUNC
2366
flags |= os.O_WRONLY
2367
flags |= os.O_CREAT | os.O_APPEND
2372
flags |= os.O_RDONLY
2374
return os.fdopen(os.open(filename, flags), mode, bufsize)
2379
def getuser_unicode():
2380
"""Return the username as unicode.
2383
user_encoding = get_user_encoding()
2384
username = getpass.getuser().decode(user_encoding)
2385
except UnicodeDecodeError:
2386
raise errors.BzrError("Can't decode username as %s." % \
2388
except ImportError, e:
2389
if sys.platform != 'win32':
2391
if str(e) != 'No module named pwd':
2393
# https://bugs.launchpad.net/bzr/+bug/660174
2394
# getpass.getuser() is unable to return username on Windows
2395
# if there is no USERNAME environment variable set.
2396
# That could be true if bzr is running as a service,
2397
# e.g. running `bzr serve` as a service on Windows.
2398
# We should not fail with traceback in this case.
2399
username = u'UNKNOWN'
2403
def available_backup_name(base, exists):
2404
"""Find a non-existing backup file name.
2406
This will *not* create anything, this only return a 'free' entry. This
2407
should be used for checking names in a directory below a locked
2408
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2409
Leap) and generally discouraged.
2411
:param base: The base name.
2413
:param exists: A callable returning True if the path parameter exists.
2416
name = "%s.~%d~" % (base, counter)
2419
name = "%s.~%d~" % (base, counter)
2423
def set_fd_cloexec(fd):
2424
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2425
support for this is not available.
2429
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2430
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2431
except (ImportError, AttributeError):
2432
# Either the fcntl module or specific constants are not present
2436
def find_executable_on_path(name):
2437
"""Finds an executable on the PATH.
2439
On Windows, this will try to append each extension in the PATHEXT
2440
environment variable to the name, if it cannot be found with the name
2443
:param name: The base name of the executable.
2444
:return: The path to the executable found or None.
2446
path = os.environ.get('PATH')
2449
path = path.split(os.pathsep)
2450
if sys.platform == 'win32':
2451
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2452
exts = [ext.lower() for ext in exts]
2453
base, ext = os.path.splitext(name)
2455
if ext.lower() not in exts:
2463
f = os.path.join(d, name) + ext
2464
if os.access(f, os.X_OK):
2469
def _posix_is_local_pid_dead(pid):
2470
"""True if pid doesn't correspond to live process on this machine"""
2472
# Special meaning of unix kill: just check if it's there.
2475
if e.errno == errno.ESRCH:
2476
# On this machine, and really not found: as sure as we can be
2479
elif e.errno == errno.EPERM:
2480
# exists, though not ours
2483
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2484
# Don't really know.
2487
# Exists and our process: not dead.
2490
if sys.platform == "win32":
2491
is_local_pid_dead = win32utils.is_local_pid_dead
2493
is_local_pid_dead = _posix_is_local_pid_dead
2496
def fdatasync(fileno):
2497
"""Flush file contents to disk if possible.
2499
:param fileno: Integer OS file handle.
2500
:raises TransportNotPossible: If flushing to disk is not possible.
2502
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
added
removed
bzrlib/osutils.py
