add md5sum check for ScaFaCoS download via Install.py

from __future__ import print_function

import sys,os,re,subprocess,shutil

sys.path.append('..')

from install_helpers import fullpath,geturl,get_cpus

from install_helpers import fullpath,geturl,get_cpus,checkmd5sum

from argparse import ArgumentParser

parser = ArgumentParser(prog='Install.py',

version = "1.0.1"

url = "https://github.com/scafacos/scafacos/releases/download/v%s/scafacos-%s.tar.gz" % (version, version)

# known checksums for different ScaFaCoS versions. used to validate the download.

checksums = { \

        '1.0.1' : 'bd46d74e3296bd8a444d731bb10c1738' \

        }

# extra help message

help = """

  print("Downloading ScaFaCoS ...")

  geturl(url,"%s/scafacos-%s.tar.gz" % (homepath,version))

  # verify downloaded archive integrity via md5 checksum, if known.

  if version in checksums:

    if not checkmd5sum(checksums[version],'%s/scafacos-%s.tar.gz' % (homepath,version)):

      sys.exit("Checksum for ScaFaCoS library does not match")

  print("Unpacking ScaFaCoS tarball ...")

  if os.path.exists(scafacospath):

    shutil.rmtree(scafacospath)