back to external line editor, due to problems of JLine with multithreading of in vs. out;
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: run Isabelle process with raw ML console and line editor
isabelle_admin_build jars || exit $?
case "$ISABELLE_JAVA_PLATFORM" in
  x86-*)
    ISABELLE_BUILD_JAVA_OPTIONS="$ISABELLE_BUILD_JAVA_OPTIONS32"
    ;;
  x86_64-*)
    ISABELLE_BUILD_JAVA_OPTIONS="$ISABELLE_BUILD_JAVA_OPTIONS64"
    ;;
esac
declare -a JAVA_ARGS; eval "JAVA_ARGS=($ISABELLE_BUILD_JAVA_OPTIONS)"
mkdir -p "$ISABELLE_TMP_PREFIX" || exit $?
if type -p "$ISABELLE_LINE_EDITOR" > /dev/null
then
  exec "$ISABELLE_LINE_EDITOR" "$ISABELLE_TOOL" java "${JAVA_ARGS[@]}" isabelle.ML_Console "$@"
else
  echo "### No line editor: \"$ISABELLE_LINE_EDITOR\""
  exec "$ISABELLE_TOOL" java "${JAVA_ARGS[@]}" isabelle.ML_Console "$@"
fi