This seems to work for guile-2.2 and guile-3.
Would be nice if it checked that module names look like lists.
One step closer to g-golf working on guile-3!
(define-syntax re-export-public-interface
(syntax-rules ()
"Re-export the public interface of a module or modules. Invoked as
@code{(re-export-public-interface (mod1) (mod2) ...)}."
((_ mod mods ...)
(let ((iface (module-public-interface (current-module))))
(define (r-e-p-i module)
(cond-expand
(guile-3
(module-for-each
(lambda (sym val)
(hashq-set! (module-replacements iface) sym #t)
(module-add! iface sym val))
(resolve-interface module)))
(else
(module-use! iface (resolve-interface module)))))
(r-e-p-i 'mod)
(r-e-p-i 'mods)
...))))
