~bzr-pqm/bzr/bzr.dev

# Copyright (C) 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

"""Simple parser for bzr's NEWS file.

Simple as this is, it's a bit over-powered for news_merge's needs, which only

cares about 'bullet' and 'everything else'.

This module can be run as a standalone Python program; pass it a filename and

it will print the parsed form of a file (a series of 2-tuples, see

simple_parse's docstring).

"""

from __future__ import absolute_import

def simple_parse_lines(lines):

    """Same as simple_parse, but takes an iterable of strs rather than a single

    str.

    """

    return simple_parse(''.join(lines))

def simple_parse(content):

    """Returns blocks, where each block is a 2-tuple (kind, text).

    :kind: one of 'heading', 'release', 'section', 'empty' or 'text'.

    :text: a str, including newlines.

    """

    blocks = content.split('\n\n')

    for block in blocks:

        if block.startswith('###'):

            # First line is ###...: Top heading

            yield 'heading', block

            continue

        last_line = block.rsplit('\n', 1)[-1]

        if last_line.startswith('###'):

            # last line is ###...: 2nd-level heading

            yield 'release', block

        elif last_line.startswith('***'):

            # last line is ***...: 3rd-level heading

            yield 'section', block

        elif block.startswith('* '):

            # bullet

            yield 'bullet', block

        elif block.strip() == '':

            # empty

            yield 'empty', block

        else:

            # plain text

            yield 'text', block

if __name__ == '__main__':

    import sys

    content = open(sys.argv[1], 'rb').read()

    for result in simple_parse(content):

        print result