Search a PL/SQL package for calls to other PL/SQL packages

In eshell:

cat gys_hh_pass2_pkg.bdy | grep --ignore-case "pkg\." | sed "s/\\([A-Z0-9_]\\+_PKG\\)/@\\1@/i" | sed "s/.*@\\(.*\\)@.*/\\1/" | sort | uniq