clarified context for (remote) bash scripts: export variables are optional, support cwd;
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: invoke the dotnet CLI driver within the Isabelle environment
if [ -z "$ISABELLE_DOTNET" ]; then
echo "Missing Dotnet installation: need to run \"isabelle dotnet_setup\" first" >&2
exit 2
else
exec "$ISABELLE_DOTNET" "$@"
fi