gistfile1.txt

    @CoreMethod(names = "home_directory", onSingleton = true)
    public abstract static class HomeDirectoryNode extends CoreMethodNode {

        public HomeDirectoryNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public HomeDirectoryNode(HomeDirectoryNode prev) {
            super(prev);
        }

        @CompilerDirectives.TruffleBoundary
        @Specialization
        public RubyString homeDirectory() {
            return getContext().makeString(getContext().getRuntime().getJRubyHome());
        }

    }