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  • Committer: Alexander Belchenko
  • Date: 2006-07-30 16:43:12 UTC
  • mto: (1711.2.111 jam-integration)
  • mto: This revision was merged to the branch mainline in revision 1906.
  • Revision ID: bialix@ukr.net-20060730164312-b025fd3ff0cee59e
rename  gpl.txt => COPYING.txt

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bzrlib/filters/eol.py
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# Copyright (C) 2009, 2010 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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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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"""End of Line Conversion filters.
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See bzr help eol for details.
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"""
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import re, sys
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from bzrlib.errors import BzrError
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# Real Unix newline - \n without \r before it
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_UNIX_NL_RE = re.compile(r'(?<!\r)\n')
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def _to_lf_converter(chunks, context=None):
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    """A content file that converts crlf to lf."""
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    content = ''.join(chunks)
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    if '\x00' in content:
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        return [content]
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    else:
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        return [content.replace('\r\n', '\n')]
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def _to_crlf_converter(chunks, context=None):
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    """A content file that converts lf to crlf."""
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    content = ''.join(chunks)
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    if '\x00' in content:
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        return [content]
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    else:
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        return [_UNIX_NL_RE.sub('\r\n', content)]
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# Register the eol content filter.
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def register_eol_content_filter():
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    from bzrlib.filters import ContentFilter, register_filter_stack_map
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    if sys.platform == 'win32':
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        _native_output = _to_crlf_converter
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    else:
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        _native_output = _to_lf_converter
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    _eol_filter_stack_map = {
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        'exact': [],
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        'native': [ContentFilter(_to_lf_converter, _native_output)],
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        'lf':     [ContentFilter(_to_lf_converter, _to_lf_converter)],
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        'crlf':   [ContentFilter(_to_lf_converter, _to_crlf_converter)],
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        'native-with-crlf-in-repo':
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            [ContentFilter(_to_crlf_converter, _native_output)],
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        'lf-with-crlf-in-repo':
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            [ContentFilter(_to_crlf_converter, _to_lf_converter)],
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        'crlf-with-crlf-in-repo':
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            [ContentFilter(_to_crlf_converter, _to_crlf_converter)],
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        }
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    def eol_lookup(key):
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        filter = _eol_filter_stack_map.get(key)
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        if filter is None:
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            raise BzrError("Unknown eol value '%s'" % key)
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        return filter
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    register_filter_stack_map('eol', eol_lookup)