#!/usr/bin/env python3
# encoding: utf-8

import os
import sys
import argparse
import json
import re
import subprocess

### Require python3
if sys.version_info[0] != 3:
    print("This script requires Python 3")
    exit()

def main():
  myargs = []
  with open('substitution.conf','r') as f:
    while(True):
      a = f.readline().strip()
      if(a == ''):
        break
      myargs.append(a)

  if(len(myargs) == 0):
    print('Nothing to do.')
    exit(2)

  parser1 = argparse.ArgumentParser()
  parser1.add_argument('filename')
  args = parser1.parse_args()

  parser2 = argparse.ArgumentParser()
  parser2.add_argument('command')
  parser2.add_argument('--dry-run', action='store_true', default=False, help='dry run')
  parser2.add_argument('args', nargs='+')
  args2 = parser2.parse_args(myargs)

  cmd= [args2.command,args.filename]+ args2.args
  if(args2.dry_run):
    print('$ {}'.format(cmd))
  else:
    subprocess.call(cmd)

if __name__ == "__main__":
    main()