npm and error messages

node_modules/node-sass/lib/binding.js

@@ -0,0 +1,20 @@
+/*!
+ * node-sass: lib/binding.js
+ */
+
+var errors = require('./errors');
+
+/**
+ * Require binding
+ */
+module.exports = function(ext) {
+  if (!ext.hasBinary(ext.getBinaryPath())) {
+    if (!ext.isSupportedEnvironment()) {
+      throw new Error(errors.unsupportedEnvironment());
+    } else {
+      throw new Error(errors.missingBinary());
+    }
+  }
+
+  return require(ext.getBinaryPath());
+};