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# Copyright (C) 2009, 2010 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""End of Line Conversion filters.
See bzr help eol for details.
"""
from __future__ import absolute_import
import re, sys
from bzrlib.errors import BzrError
from bzrlib.filters import ContentFilter
# Real Unix newline - \n without \r before it
_UNIX_NL_RE = re.compile(r'(?<!\r)\n')
def _to_lf_converter(chunks, context=None):
"""A content file that converts crlf to lf."""
content = ''.join(chunks)
if '\x00' in content:
return [content]
else:
return [content.replace('\r\n', '\n')]
def _to_crlf_converter(chunks, context=None):
"""A content file that converts lf to crlf."""
content = ''.join(chunks)
if '\x00' in content:
return [content]
else:
return [_UNIX_NL_RE.sub('\r\n', content)]
if sys.platform == 'win32':
_native_output = _to_crlf_converter
else:
_native_output = _to_lf_converter
_eol_filter_stack_map = {
'exact': [],
'native': [ContentFilter(_to_lf_converter, _native_output)],
'lf': [ContentFilter(_to_lf_converter, _to_lf_converter)],
'crlf': [ContentFilter(_to_lf_converter, _to_crlf_converter)],
'native-with-crlf-in-repo':
[ContentFilter(_to_crlf_converter, _native_output)],
'lf-with-crlf-in-repo':
[ContentFilter(_to_crlf_converter, _to_lf_converter)],
'crlf-with-crlf-in-repo':
[ContentFilter(_to_crlf_converter, _to_crlf_converter)],
}
def eol_lookup(key):
filter = _eol_filter_stack_map.get(key)
if filter is None:
raise BzrError("Unknown eol value '%s'" % key)
return filter
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