#!/usr/bin/python3

# Script to mark private symbols
# Copyright: 2015 Dmitry Shachnev <mitya57@debian.org>

# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


'''Mark private symbols based on Qt version tags (symbols that are tagged
with Qt_5_PRIVATE_API will be marked as private).'''


from argparse import ArgumentParser
from difflib import unified_diff
from glob import glob
from sys import stdout, stderr


def process_symbols_file(symbols_file_path, write_results=False):
    old_lines = []
    new_lines = []
    has_alternative = False
    with open(symbols_file_path) as symbols_file:
        for line in symbols_file:
            old_lines.append(line)
            line = line.rstrip()
            if line.endswith(' 1'):
                line = line[:-2]
            if '@Qt_5_PRIVATE_API' in line:
                line += ' 1'
            if line.startswith('| '):
                has_alternative = True
            new_lines.append(line + '\n')
    if not has_alternative:
        print('Skipping file %s, no alternative dependency specified.' %
              symbols_file_path)
    elif write_results:
        with open(symbols_file_path, 'w') as symbols_file:
            for line in new_lines:
                symbols_file.write(line)
    else:
        for line in unified_diff(old_lines, new_lines,
                                 fromfile=symbols_file_path,
                                 tofile=symbols_file_path):
            stdout.write(line)


if __name__ == '__main__':
    parser = ArgumentParser(description=__doc__)
    group = parser.add_mutually_exclusive_group()
    group.add_argument('--write-results',
                       help='write results back into symbols files (default)',
                       action='store_false')
    group.add_argument('--print-diff',
                       help='print diffs into stdout instead of applying them',
                       action='store_true')
    args = parser.parse_args()

    symbols_files = glob('debian/*.symbols')
    if not symbols_files:
        print('No symbols files found!', file=stderr)
    for symbols_file_path in symbols_files:
        process_symbols_file(symbols_file_path, not args.print_diff)