#!/bin/sh
# $Id: python-version.in 5550 2009-02-19 18:14:43Z cher $
# Copyright (c) 2005-2008 Alexander Chernov <cher@ejudge.ru>

LANG_CONFIG_DIR="/home/judges/compile/conf/lang.d"

common_config() {
  echo 'long_name="Python"'
  echo 'src_sfx=".py"'
  echo 'arch="linux-shared"'
}

failure() {
  rm -f conftest*
  echo 'version='
  echo 'arg="'"${arg}"'"'
  common_config
  echo 'PYTHONPATH=/bin/false'
  [ "${verbose}" = 1 ] && echo "no" >&2
  exit 1
}

unset LANG
unset LC_ALL
unset LC_MESSAGES
unset LANGUAGE

if [ x"$1" = x-v ]
then
  verbose=1
  shift
fi

# recheck the language
if [ x"$1" = x-r ]
then
  arg="$2"
  [ x"$2" != x ] && python="$2"
  [ "${python}" = "" ] && python="python"

  [ "${verbose}" = 1 ] && echo -n "checking whether Python is available..." >&2
  "${python}" -V >/dev/null 2>&1 || failure
  version=`"${python}" -V 2>&1 | gawk '{ print $2; }'` || failure
  [ "${version}" != "" ] || failure
  PYTHONPATH=`which "${python}"` || failure
  [ "${PYTHONPATH}" != "" ] || failure
  echo "#! ${PYTHONPATH}" > conftest.py
  echo 'print "OK"' >> conftest.py
  chmod +x ./conftest.py || failure
  ./conftest.py >/dev/null 2>&1 || failure

  rm -f ./conftest*
  echo 'version="'"${version}"'"'
  echo 'arg="'"${arg}"'"'
  common_config
  echo 'PYTHONPATH="'"${PYTHONPATH}"'"'
  [ "${verbose}" = 1 ] && echo "yes, ${PYTHONPATH}, ${version}" >&2
  exit 0
fi

if [ x"$1" = x-l ]
then
  echo "Python interpreter [http://www.python.org]"
  exit 0
fi

[ "${EJUDGE_LANG_CONFIG}" = "" ] && EJUDGE_LANG_CONFIG="${LANG_CONFIG_DIR}/python.cfg"

if [ -f "${EJUDGE_LANG_CONFIG}" ]
then
  . "${EJUDGE_LANG_CONFIG}"
else
  PYTHONPATH="/usr/bin/python"
fi

if [ x"${PYTHONPATH}" = x -o x"${PYTHONPATH}" = x/bin/false ]
then
  echo "This language is not supported." >&2
  exit 1
fi

if [ x"$1" = x-p ]
then
    echo "${PYTHONPATH}"
    exit 0
fi

"${PYTHONPATH}" -V 2>/dev/null >/dev/null || exit 1
    
[ x"$1" = x-f ] && echo -n "Python "

"${PYTHONPATH}" -V 2>&1 | gawk '{ print $2; }'