path: root/src/extract/cut

#!/usr/bin/env python
# -*- mode: python, encoding: utf-8 -*-

# libgamma -- Display server abstraction layer for gamma ramp adjustments
# Copyright (C) 2014  Mattias Andrée (maandree@member.fsf.org)
# 
# This library 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 3 of the License, or
# (at your option) any later version.
# 
# This library 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 library.  If not, see <http://www.gnu.org/licenses/>.

# Very limited GNU cut.


import sys


delimiter = '\t'
fields = []
complement = False


i, n = 1, len(sys.argv)
while i < n:
    arg = sys.argv[i]
    if arg == '-d':
        i += 1
        delimiter = sys.argv[i]
    elif arg == '-f':
        i += 1
        fields += [int(f) - 1 for f in sys.argv[i].split(',')]
    elif arg == '--complement':
        complement = True
    i += 1


fields = set(fields)


def modify(line):
    line = line.split(delimiter)
    if complement:
        line = [line[i] for i in range(len(line)) if i not in fields]
    else:
        line = [line[i] for i in range(len(line)) if i in fields]
    return delimiter.join(line)


data = sys.stdin.read()
data = '\n'.join(modify(line) for line in data.split('\n'))
sys.stdout.write(data)
sys.stdout.flush()