#!/bin/sh

"true" '''\'
for pyimpl in python3 python python2; do
  which $pyimpl > /dev/null 2>&1
  if [ $? -eq 0 ]; then
    exec $pyimpl "$0" "$@"
  fi
done
echo "Error! Could not locate Python! Please install and have python3, python, or python2 in PATH."
echo "Or use: /path/to/valid/python configure $@"
exit 127
'''

import sys, os

banner_length = 93
banner_sep    = '*'
banner_line   = banner_sep*banner_length

if sys.version_info < (3,0):
  print(banner_line)
  print(banner_sep+'python2 support in configure is deprecated'.center(banner_length-2)+banner_sep)
  print(banner_sep+'PETSc version 3.18+ will require at least python3.4'.center(banner_length-2)+banner_sep)
  print(banner_line)

if sys.version_info < (2,7) or ((3,0) <= sys.version_info < (3,4)):
  print(banner_line)
  print(banner_sep+'Python version 2.7 or 3.4+ is required to run ./configure'.center(banner_length-2)+banner_sep)
  print(banner_sep+'Try: "python3 ./configure" or "python2.7 ./configure"'.center(banner_length-2)+banner_sep)
  print(banner_line)
  sys.exit(4)

sys.path.insert(0, os.path.abspath('config'))
import configure
configure.petsc_configure([])