more conservative update of Haskell stack (amending 04e54f57a869): 13.0 still lacks notable packages like "Agda" or "darcs";
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala within the Isabelle environment
isabelle_admin_build jars || exit $?
eval "declare -a JAVA_ARGS=($ISABELLE_JAVA_SYSTEM_OPTIONS)"
declare -a SCALA_ARGS=()
for ARG in "${JAVA_ARGS[@]}"
do
SCALA_ARGS["${#SCALA_ARGS[@]}"]="-J$ARG"
done
isabelle_scala scala "${SCALA_ARGS[@]}" \
-classpath "$(platform_path "$ISABELLE_CLASSPATH")" "$@"