public RhinoCompiler(LessOptions options, ResourceLoader loader, URL less, URL env, URL engine, URL cssmin, URL sourceMap) throws IOException {
Context cx = Context.enter();
logger.debug("Using implementation version: "
+ cx.getImplementationVersion());
cx.setOptimizationLevel(-1);
Global global = new Global();
global.init(cx);
scope = cx.initStandardObjects(global);
cx.evaluateReader(scope, new InputStreamReader(sourceMap
.openConnection().getInputStream()), sourceMap.getFile(), 1,
null);
cx.evaluateReader(scope, new InputStreamReader(env.openConnection()