path: root/src/extract/cut

#!/usr/bin/env python
# -*- mode: python, encoding: utf-8 -*-
# See LICENSE file for copyright and license details.

# 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()