#!/cvmfs/neugrid.egi.eu/software/x86_64/c-pack-d788610/linuxbrew/bin/python

import sys
from os import path

def check_inputs(*pathstrs):
    for pathstr in pathstrs:
        if not path.exists(pathstr):
            print "ERROR: input '%s' doesn't exist" % pathstr
            raise SystemExit(2)
        _,ext = path.splitext(pathstr)
        if ext != ".py":
            print "ERROR: input '%s' is not a python file (*.py)" % pathstr
            raise SystemExit(2)
    return

if len(sys.argv) != 2:
    print "Usage: %s /path/to/data_config.py" % path.basename(sys.argv[0])
    print "Will output three files needed by C-PAC into the current directory"
    raise SystemExit(1)

data_config_file = sys.argv[1]

check_inputs(data_config_file)

import CPAC
CPAC.utils.extract_data.run(data_config_file)