From 7c1efb18d161a912e3d0b64d40eeb46823b97194 Mon Sep 17 00:00:00 2001
From: Pavel Djundik <xPaw@users.noreply.github.com>
Date: Mon, 4 Mar 2019 20:35:21 +0200
Subject: [PATCH] Print a warning on invalid keys in config

---
 src/command-line/index.js | 3 +--
 src/helper.js             | 6 +++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/command-line/index.js b/src/command-line/index.js
index 107a1450..b45c7ced 100644
--- a/src/command-line/index.js
+++ b/src/command-line/index.js
@@ -1,6 +1,5 @@
 "use strict";
 
-const _ = require("lodash");
 const log = require("../log");
 const fs = require("fs");
 const path = require("path");
@@ -34,7 +33,7 @@ if (process.getuid) {
 Utils.checkOldHome();
 
 // Merge config key-values passed as CLI options into the main config
-_.merge(Helper.config, program.config);
+Helper.mergeConfig(Helper.config, program.config);
 
 require("./start");
 
diff --git a/src/helper.js b/src/helper.js
index 5874db7a..d2f96f51 100644
--- a/src/helper.js
+++ b/src/helper.js
@@ -230,7 +230,11 @@ function getDefaultNick() {
 }
 
 function mergeConfig(oldConfig, newConfig) {
-	return _.mergeWith(oldConfig, newConfig, (objValue, srcValue, key) => {
+	return _.mergeWith(oldConfig, newConfig, (objValue, srcValue, key, object) => {
+		if (!object.hasOwnProperty(key)) {
+			log.warn(`Unknown key "${colors.bold(key)}", please verify your config.`);
+		}
+
 		// Do not override config variables if the type is incorrect (e.g. object changed into a string)
 		if (typeof objValue !== "undefined" && objValue !== null && typeof objValue !== typeof srcValue) {
 			log.warn(`Incorrect type for "${colors.bold(key)}", please verify your config.`);