#!/bin/bash

function die () {
  echo >&2 "${1}"
  exit 1
}

if [[ -z "${JAVA_HOME}" ]] ; then
  die "No JAVA_HOME env var defined"
fi

OUTPUT_JRE=${1:?no output JRE dir provided}
if [[ -e ${OUTPUT_JRE} ]] ; then
  die "Output JRE dir already exists: ${OUTPUT_JRE}"
fi
MODS=${2:-java.base}

${JAVA_HOME}/bin/jlink --module-path ${JAVA_HOME}/jmods --add-modules ${MODS} --output ${OUTPUT_JRE}