more robust check of ISABELLE_PLATFORM_FAMILY within settings environment, to support its reunification with Isabelle/Scala (see also a33a6e541cbb, f3a356c64193);
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala within the Isabelle environment
isabelle scala_build || exit $?
classpath "$ISABELLE_SETUP_CLASSPATH"; unset ISABELLE_SETUP_CLASSPATH
classpath "$CLASSPATH"; export CLASSPATH=""
export jvm_cp_args="$(platform_path "$ISABELLE_CLASSPATH")"
export JAVA_OPTS="$ISABELLE_JAVA_SYSTEM_OPTIONS -J-Dscala.usejavacp=true"
case "$ISABELLE_PLATFORM_FAMILY" in
windows*)
export TERM=dumb
;;
fi
isabelle_scala scala $ISABELLE_SCALAC_OPTIONS "$@"