first commit

build/node_modules/onetime/index.js

@@ -0,0 +1,31 @@
+'use strict';
+module.exports = function (fn, errMsg) {
+	if (typeof fn !== 'function') {
+		throw new TypeError('Expected a function');
+	}
+
+	var ret;
+	var called = false;
+	var fnName = fn.displayName || fn.name || (/function ([^\(]+)/.exec(fn.toString()) || [])[1];
+
+	var onetime = function () {
+		if (called) {
+			if (errMsg === true) {
+				fnName = fnName ? fnName + '()' : 'Function';
+				throw new Error(fnName + ' can only be called once.');
+			}
+
+			return ret;
+		}
+
+		called = true;
+		ret = fn.apply(this, arguments);
+		fn = null;
+
+		return ret;
+	};
+
+	onetime.displayName = fnName;
+
+	return onetime;
+};