update generic Install.py script to use argparse

from __future__ import print_function

import sys,os,subprocess

sys.path.append('..')

from install_helpers import error,get_cpus

# parse args

args = sys.argv[1:]

nargs = len(args)

if nargs == 0: error()

machine = None

extraflag = 0

iarg = 0

while iarg < nargs:

  if args[iarg] == "-m":

    if iarg+2 > nargs: error()

    machine = args[iarg+1]

    iarg += 2

  elif args[iarg] == "-e":

    if iarg+2 > nargs: error()

    extraflag = 1

    suffix = args[iarg+1]

    iarg += 2

  else: error()

from install_helpers import get_cpus,fullpath

from argparse import ArgumentParser

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

                        description="LAMMPS library build wrapper script")

help = """

Syntax from src dir: make lib-libname args="-m machine -e suffix"

Syntax from lib dir: python Install.py -m machine -e suffix

libname = name of lib dir (e.g. atc, h5md, meam, poems, etc)

specify -m and optionally -e, order does not matter

Examples:

make lib-poems args="-m serial" # build POEMS lib with same settings as in the serial Makefile in src

make lib-colvars args="-m mpi"  # build USER-COLVARS lib with same settings as in the mpi Makefile in src

make lib-meam args="-m ifort"   # build MEAM lib with custom Makefile.ifort (using Intel Fortran)

"""

# parse and process arguments

parser.add_argument("-m", "--machine",

                    help="suffix of a <libname>/Makefile.* file used for compiling this library")

parser.add_argument("-e", "--extramake",

                    help="set EXTRAMAKE variable in <libname>/Makefile.<machine> to Makefile.lammps.<extramake>")

args = parser.parse_args()

# print help message and exit, if neither build nor path options are given

if not args.machine and not args.extramake:

  parser.print_help()

  sys.exit(help)

machine = args.machine

extraflag = args.extramake

# set lib from working dir

cwd = os.getcwd()

cwd = fullpath('.')

lib = os.path.basename(cwd)

# create Makefile.auto as copy of Makefile.machine

if os.path.exists("lib%s.a" % lib): print("Build was successful")

else: error("Build of lib/%s/lib%s.a was NOT successful" % (lib,lib))

if has_extramake and not os.path.exists("Makefile.lammps"):

  print("lib/%s/Makefile.lammps was NOT created" % lib)

  print("WARNING: lib/%s/Makefile.lammps was NOT created" % lib)

import hashlib,os,subprocess,sys

# default help message

defhelp = """

Syntax from src dir: make lib-libname args="-m machine -e suffix"

Syntax from lib dir: python Install.py -m machine -e suffix

libname = name of lib dir (e.g. atc, h5md, meam, poems, etc)

specify -m and optionally -e, order does not matter

  -m = peform a clean followed by "make -f Makefile.machine"

       machine = suffix of a lib/Makefile.* file

  -e = set EXTRAMAKE variable in Makefile.machine to Makefile.lammps.suffix

       does not alter existing Makefile.machine

Examples:

make lib-poems args="-m serial" # build POEMS lib with same settings as in the serial Makefile in src

make lib-colvars args="-m mpi"  # build USER-COLVARS lib with same settings as in the mpi Makefile in src

make lib-meam args="-m ifort"   # build MEAM lib with custom Makefile.ifort (using Intel Fortran)

"""

# print error message or help

def error(str=None,help=None):

  if not str:

    if not help:

        print(defhelp)

    else:

        print(help)

  else: print("ERROR",str)

  sys.exit()

# try to auto-detect the maximum number of available CPUs

def get_cpus():

  try:

from __future__ import print_function

import sys,os,re,subprocess,shutil

sys.path.append('..')

from install_helpers import error,get_cpus,fullpath,which,geturl

from install_helpers import get_cpus,fullpath,geturl

from argparse import ArgumentParser

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