#!/usr/bin/env python

'''A program to create tar files from a file or directory.'''

import sys
import os
from anuga.utilities.system_tools import untar_file


# assumed program name - refreshed from command line args
Prog_Name = 'untar_file.py'

# print usage info. and exit
def usage():
    print 'usage: %s <tarfile> [<output_directory>]' % Prog_Name
    print 'where <tarfile>          is the path to the file to untar,'
    print '  and <output_directory> is the directory to write the results into.'
    sys.exit(10)

# get program name
# does this work on  Windows?
Prog_Name = os.path.basename(sys.argv[0])

# check args
if len(sys.argv) != 2 and len(sys.argv) != 3:
    usage()

# create the tarred/compressed file
if len(sys.argv) == 2:
    untar_file(sys.argv[1])
else:
    untar_file(sys.argv[1], sys.argv[2])