#!/usr/bin/env python3
"""
Convert a GFA file to the other specification version
"""

import sys
import os
import gfapy
import argparse

op = argparse.ArgumentParser(description=__doc__)
op.add_argument("filename")
op.add_argument('--version', action='version', version='%(prog)s 1.0')
opts = op.parse_args()

gfa = gfapy.Gfa.from_file(opts.filename)
try:
  for line in gfa.lines:
    if gfa.version == "gfa1":
      print(line.to_gfa2_s())
    else:
      converted_line = line.to_gfa1_s()
      if (converted_line):
        print(converted_line)
except gfapy.Error as err:
  sys.stderr.write(str(err))
  sys.exit(1)