add checksum support for downloaded tar archives. upgrade to v2.4.3

# used to automate the steps described in the README file in this dir

from __future__ import print_function

import sys,os,re,subprocess

import sys,os,re,subprocess,hashlib

# help message

help = """

Syntax from src dir: make lib-plumed args="-b"

                 or: make lib-plumed args="-b -v 2.4.2"

Syntax from lib dir: python Install.py -b -v 2.4.2

                 or: make lib-plumed args="-b -v 2.4.3"

                 or: make lib-plumed args="-p /usr/local/plumed2-2.4.3"

Syntax from lib dir: python Install.py -b -v 2.4.3

                 or: python Install.py -b

                 or: python Install.py -p /usr/local/plumed-2.4.2

                 or: python Install.py -p /usr/local/plumed2-2.4.3

specify one or more options, order does not matter

  -b = download and build the plumed2 library

  -p = specify folder of existing plumed2 installation

  -v = set version of plumed2 to download and build (default: 2.4.2)

  -v = set version of plumed2 to download and build (default: 2.4.3)

Example:

make lib-plumed args="-b"   # download/build in lib/plumed/plumed2

make lib-plumed args="-p $HOME/plumed-2.4.2" # use existing Plumed2 installation in $HOME/plumed-2.4.2

make lib-plumed args="-p $HOME/plumed-2.4.3" # use existing Plumed2 installation in $HOME/plumed-2.4.3

"""

# settings

version = "2.4.2"

version = "2.4.3"

# Add known checksums for different PLUMED versions and use them to validate the download

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

checksums = { \

        '2.4.2' : '0f66f24b4c763ae8b2f39574113e9935', \

        '2.4.3' : 'dc38de0ffd59d13950d8f1ef1ce05574', \

        }

# print error message or help

def error(str=None):

    error("Failed to download source code with 'curl' or 'wget'")

  return

# Here add function to check fsum

def checkmd5sum(md5sum,fname):

    with open(fname,'rb') as fh:

        m = hashlib.md5()

        while True:

            data = fh.read(81920)

            if not data:

                break

            m.update(data)

    fh.close()

    return m.hexdigest() == md5sum

# parse args

  print("Downloading plumed  ...")

  geturl(url,filename)

  print("Unpacking plumed tarball ...")

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

  if version in checksums:

    if not checkmd5sum(checksums[version],filename):

      error("Checksum for plumed2 library does not match")

  print("Unpacking plumed2 tarball ...")

  if os.path.exists("%s/plumed2-%s" % (homepath,version)):

    cmd = 'rm -rf "%s/plumed2-%s"' % (homepath,version)

    subprocess.check_output(cmd,stderr=subprocess.STDOUT,shell=True)