grunt: only compile ACP less if that was changed, and vice versa with theme/plugin less

Gruntfile.js

@@ -17,17 +17,20 @@ module.exports = function(grunt) {
 			args.push('--log-level=info');
 		}
 		
-		if (target === 'lessUpdated') {
-			fromFile = ['js','tpl'];
-			compiling = 'less';
+		if (target === 'lessUpdated_Client') {
+			fromFile = ['js', 'tpl', 'acpLess'];
+			compiling = 'clientLess';
+		} else if (target === 'lessUpdated_Admin') {
+			fromFile = ['js', 'tpl', 'clientLess'];
+			compiling = 'acpLess';
 		} else if (target === 'clientUpdated') {
-			fromFile = ['less','tpl'];
+			fromFile = ['clientLess', 'acpLess', 'tpl'];
 			compiling = 'js';
 		} else if (target === 'templatesUpdated') {
-			fromFile = ['js','less'];
+			fromFile = ['js', 'clientLess', 'acpLess'];
 			compiling = 'tpl';
 		} else if (target === 'serverUpdated') {
-			fromFile = ['less','js','tpl'];
+			fromFile = ['clientLess', 'acpLess', 'js', 'tpl'];
 		}
 
 		fromFile = fromFile.filter(function(ext) {
@@ -53,8 +56,11 @@ module.exports = function(grunt) {
 
 	grunt.initConfig({
 		watch: {
-			lessUpdated: {
-				files: ['public/**/*.less', 'node_modules/nodebb-*/*.less', 'node_modules/nodebb-*/*/*.less', 'node_modules/nodebb-*/*/*/*.less', 'node_modules/nodebb-*/*/*/*/*.less']
+			lessUpdated_Client: {
+				files: ['public/*.less', 'node_modules/nodebb-*/*.less', 'node_modules/nodebb-*/*/*.less', 'node_modules/nodebb-*/*/*/*.less', 'node_modules/nodebb-*/*/*/*/*.less']
+			},
+			lessUpdated_Admin: {
+				files: ['public/**/*.less']
 			},
 			clientUpdated: {
 				files: ['public/src/**/*.js', 'node_modules/nodebb-*/*.js', 'node_modules/nodebb-*/*/*.js', 'node_modules/nodebb-*/*/*/*.js', 'node_modules/nodebb-*/*/*/*/*.js', 'node_modules/templates.js/lib/templates.js']

src/meta/css.js

@@ -80,11 +80,22 @@ module.exports = function(Meta) {
 
 				source = '@import "./theme";\n' + source;
 
+				var fromFile = nconf.get('from-file') || '';
 				async.parallel([
 					function(next) {
+						if (fromFile.match('clientLess')) {
+							winston.info('[minifier] Compiling front-end LESS files skipped');
+							return Meta.css.getFromFile(path.join(__dirname, '../../public/stylesheet.css'), Meta.css.cache, next);
+						}
+
 						minify(source, paths, 'cache', next);
 					},
 					function(next) {
+						if (fromFile.match('acpLess')) {
+							winston.info('[minifier] Compiling ACP LESS files skipped');
+							return Meta.css.getFromFile(path.join(__dirname, '../../public/admin.css'), Meta.css.acpCache, next);
+						}
+						
 						minify(acpSource, paths, 'acpCache', next);
 					}
 				], function(err, minified) {
@@ -151,29 +162,13 @@ module.exports = function(Meta) {
 		});
 	};
 
-	Meta.css.getFromFile = function(callback) {
-		var cachePath = path.join(__dirname, '../../public/stylesheet.css'),
-			acpCachePath = path.join(__dirname, '../../public/admin.css');
-		file.exists(cachePath, function(exists) {
-			if (!exists) {
-				winston.warn('[meta/css] No stylesheets found on disk, re-minifying');
-				Meta.css.minify(callback);
-				return;
-			}
-
-			if (nconf.get('isPrimary') !== 'true') {
-				return callback();
-			}
+	Meta.css.getFromFile = function(filePath, cache, callback) {
+		winston.verbose('[meta/css] Reading stylesheet ' + filePath.split('/').pop() + ' from file');
 
-			winston.verbose('[meta/css] Reading stylesheets from file');
-			async.map([cachePath, acpCachePath], fs.readFile, function(err, files) {
-				Meta.css.cache = files[0];
-				Meta.css.acpCache = files[1];
-
-				emitter.emit('meta:css.compiled');
+		fs.readFile(filePath, function(err, file) {
+			cache = file;
 			callback();
 		});
-		});
 	};
 
 	function minify(source, paths, destination, callback) {

src/webserver.js

@@ -78,11 +78,6 @@ function initializeNodeBB(callback) {
 		skipJS = true;
 	}
 
-	if (fromFile.match('less')) {
-		winston.info('[minifier] Compiling LESS files skipped');
-		skipLess = true;
-	}
-
 	async.waterfall([
 		async.apply(cacheStaticFiles),
 		async.apply(meta.themes.setupPaths),
@@ -94,7 +89,7 @@ function initializeNodeBB(callback) {
 				async.apply(meta.templates.compile),
 				async.apply(!skipJS ? meta.js.minify : meta.js.getFromFile, 'nodebb.min.js'),
 				async.apply(!skipJS ? meta.js.minify : meta.js.getFromFile, 'acp.min.js'),
-				async.apply(!skipLess ? meta.css.minify : meta.css.getFromFile),
+				async.apply(meta.css.minify),
 				async.apply(meta.sounds.init),
 				async.apply(meta.blacklist.load)
 			], next);