closes #2451

src/meta/configs.js

@@ -59,6 +59,10 @@ module.exports = function(Meta) {
 	};
 
 	Meta.configs.setMultiple = function(data, callback) {
+		processConfig(data, function(err) {
+			if (err) {
+				return callback(err);
+			}
 			db.setObject('config', data, function(err) {
 				if (err) {
 					return callback(err);
@@ -67,8 +71,31 @@ module.exports = function(Meta) {
 				updateConfig(data);
 				callback();
 			});
+		});
 	};
 
+	function processConfig(data, callback) {
+		if (data.customCSS) {
+			saveRenderedCss(data, callback);
+			return;
+		}
+		callback();
+	}
+
+	function saveRenderedCss(data, callback) {
+		var less = require('less');
+		less.render(data.customCSS, {
+			compress: true
+		}, function(err, lessObject) {
+			if (err) {
+				winston.error('[less] Could not convert custom LESS to CSS! Please check your syntax.');
+				return callback(null, '');
+			}
+			data.renderedCustomCSS = lessObject.css;
+			callback(null, lessObject.css);
+		});
+	}
+
 	function updateConfig(data) {
 		var msg = {action: 'config:update', data: data};
 		if (process.send) {

src/middleware/middleware.js

@@ -305,26 +305,10 @@ middleware.renderHeader = function(req, res, callback) {
 		async.parallel({
 			customCSS: function(next) {
 				templateValues.useCustomCSS = parseInt(meta.config.useCustomCSS, 10) === 1;
-				if (!templateValues.useCustomCSS) {
+				if (!templateValues.useCustomCSS || !meta.config.customCSS || !meta.config.renderedCustomCSS) {
 					return next(null, '');
 				}
-
-				if (!meta.config.customCSS) {
-					return next(null, '');
-				}
-
-				var less = require('less');
-
-				less.render(meta.config.customCSS, {
-					compress: true
-				}, function(err, lessObject) {
-					if (err) {
-						winston.error('[less] Could not convert custom LESS to CSS! Please check your syntax.');
-						return next(null, '');
-					}
-
-					next(null, lessObject.css);
-				});
+				next(null, meta.config.renderedCustomCSS);
 			},
 			customJS: function(next) {
 				templateValues.useCustomJS = parseInt(meta.config.useCustomJS, 10) === 1;