angie-conv-image/j2cfg/j2cfg-single.py

#!/usr/bin/env python3

import os.path
import sys


def main():
    if len(sys.argv) < 2:
        raise ValueError('not enough arguments (min: 1)')
    if len(sys.argv) > 3:
        raise ValueError('too many arguments (max: 2)')

    if not sys.argv[1]:
        raise ValueError('specify input file')

    if (len(sys.argv) == 3) and (not sys.argv[2]):
        raise ValueError('specify output file')

    sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
    import j2cfg

    r = j2cfg.J2cfg()
    r.render_file(*sys.argv[1:])
    sys.exit(0)


if __name__ == "__main__":
    main()