* guix/script/import/opam.scm: Add recursive option. * guix/import/opam.scm (opam->guix-package): return two values. (opam-recursive-import): New variable.
* guix/scripts/import.scm (importers): Add opam. * guix/scripts/import/opam.scm: New file. * guix/import/opam.scm: New file. * tests/opam.scm: New file. * Makefile.am: Add them. * doc/guix.texi (Invoking guix import): Document it.