INTERFACE PkgRoot;

IMPORT Dir, Node;

TYPE
  T <: Tx; Tx = Dir.T OBJECT
    path      : TEXT    := NIL;
    buildable : BOOLEAN := FALSE;
    kind      : Node.Class;
  END;

PROCEDURE Add (name, path: TEXT;  buildable: BOOLEAN);

PROCEDURE First (): T;

PROCEDURE Init ();

Register any existing roots

PROCEDURE Reset ();

Remove and unregister any existing roots

END PkgRoot.