fix: remove left over code, use proper names

src/promisify.js

@@ -17,54 +17,33 @@ module.exports = function (theModule, ignoreKeys) {
 		return fn && fn.constructor && fn.constructor.name === 'AsyncFunction';
 	}
 
-	var parts = [];
-	function promisifyRecursive(module, key) {
+
+	function promisifyRecursive(module) {
 		if (!module) {
 			return;
 		}
-		if (key) {
-			parts.push(key);
-		}
+
 		var keys = Object.keys(module);
 		keys.forEach(function (key) {
 			if (ignoreKeys.includes(key)) {
 				return;
 			}
 			if (isAsyncFunction(module[key])) {
-				module[key] = wrapIt(module[key], util.callbackify(module[key]));
+				module[key] = wrapCallback(module[key], util.callbackify(module[key]));
 			} else if (isCallbackedFunction(module[key])) {
-				module[key] = wrapTwo(module[key], util.promisify(module[key]));
+				module[key] = wrapPromise(module[key], util.promisify(module[key]));
 			} else if (typeof module[key] === 'object') {
-				promisifyRecursive(module[key], key);
+				promisifyRecursive(module[key]);
 			}
 		});
-		parts.pop();
 	}
 
-	function wrapTwo(origFn, promiseFn) {
-		return function wrapper2(...args) {
-			if (arguments.length && typeof arguments[arguments.length - 1] === 'function') {
-				return origFn.apply(null, args);
-			}
-
-			return promiseFn.apply(null, arguments);
-		};
-	}
-
-	function wrapIt(origFn, callbackFn) {
-		return async function wrapper(...args) {
+	function wrapCallback(origFn, callbackFn) {
+		return async function wrapperCallback(...args) {
 			if (arguments.length && typeof arguments[arguments.length - 1] === 'function') {
 				const cb = args.pop();
 				args.push(function (err, res) {
-					if (err) {
-						return cb(err);
-					}
-
-					// fixes callbackified functions used in async.waterfall
-					if (res !== undefined) {
-						return cb(err, res);
-					}
-					return cb(err);
+					return res !== undefined ? cb(err, res) : cb(err);
 				});
 				return callbackFn.apply(null, args);
 			}
@@ -72,6 +51,17 @@ module.exports = function (theModule, ignoreKeys) {
 		};
 	}
 
+	function wrapPromise(origFn, promiseFn) {
+		return function wrapperPromise(...args) {
+			if (arguments.length && typeof arguments[arguments.length - 1] === 'function') {
+				return origFn.apply(null, args);
+			}
+
+			return promiseFn.apply(null, arguments);
+		};
+	}
+
+	var parts = [];
 	function deprecateRecursive(module, key) {
 		if (!module) {
 			return;