more robust: make double-sure that get_text does not crash (see on non-existent file);
#!/usr/bin/env bash
#
# DESCRIPTION: build full Isabelle distribution from repository
unset CDPATH
THIS="$(cd "$(dirname "$0")"; pwd)"
"$THIS/../bin/isabelle" scala_build -q || exit $?
"$THIS/../bin/isabelle_java" isabelle.Build_Release "$@"