lib/Tools/scalac

improved interleaving of start_execution vs. cancel_execution of the next update;

#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke Scala compiler within the Isabelle environment

[ -e "$ISABELLE_HOME/Admin/build" ] && { "$ISABELLE_HOME/Admin/build" jars || exit $?; }

export JAVA_HOME="$ISABELLE_JDK_HOME"

CLASSPATH="$(jvmpath "$CLASSPATH")"
isabelle_scala scalac -Dfile.encoding=UTF-8 \
  "-Djava.ext.dirs=$("$ISABELLE_HOME/src/Tools/JVM/java_ext_dirs")" "$@"