One less Grunt dependency (minifying css)

Gruntfile.js

 module.exports = function(grunt) {
     grunt.initConfig({
-        cssmin: {
-            options: {
-                banner: "/*"+
-                        " * Converse.js (Web-based XMPP instant messaging client) \n"+
-                        " * http://conversejs.org \n"+
-                        " * Copyright (c) 2012, Jan-Carel Brand <jc@opkode.com> \n"+
-                        " * Dual licensed under the MIT and GPL Licenses \n"+
-                        " */"
-            },
-            minify: {
-                dest: 'css/converse.min.css',
-                src: ['css/converse.css']
-            }
-        },
         json: {
             main: {
                 options: {
@@ -28,6 +14,5 @@ module.exports = function(grunt) {
             }
         }
     });
-    grunt.loadNpmTasks('grunt-contrib-cssmin');
     grunt.loadNpmTasks('grunt-json');
 };

Makefile

@@ -10,6 +10,7 @@ PHANTOMJS       ?= ./node_modules/.bin/phantomjs
 RJS				?= ./node_modules/.bin/r.js
 PO2JSON         ?= ./node_modules/.bin/po2json
 SASS            ?= ./.bundle/bin/sass
+CLEANCSS        ?= ./node_modules/.bin/cleancss
 SPHINXBUILD     ?= ./bin/sphinx-build
 SPHINXOPTS      =
 
@@ -38,7 +39,6 @@ help:
 	@echo " changes       Make an overview of all changed/added/deprecated items added to the documentation."
 	@echo " clean         Remove downloaded the stamp-* guard files as well as all NPM, bower and Ruby packages."
 	@echo " css           Generate CSS from the Sass files."
-	@echo " cssmin        Minify the CSS files."
 	@echo " dev           Set up the development environment. To force a fresh start, run 'make clean' first."
 	@echo " epub          Export the documentation to epub."
 	@echo " html          Make standalone HTML files of the documentation."
@@ -127,11 +127,14 @@ dev: stamp-bower stamp-bundler build
 ## Builds
 
 .PHONY: css
-css: css/converse.css
+css: sass/*.scss css/converse.css css/converse.min.css
 
 css/converse.css:: stamp-bundler stamp-bower sass
 	$(SASS) -I ./components/bourbon/app/assets/stylesheets/ sass/converse.scss css/converse.css
 
+css/converse.min.css:: stamp-npm
+	$(CLEANCSS) css/converse.css > css/converse.min.css
+
 .PHONY: watch
 watch: stamp-bundler
 	$(SASS) --watch -I ./components/bourbon/app/assets/stylesheets/ sass/converse.scss:css/converse.css
@@ -165,16 +168,11 @@ dist/converse-mobile.js: stamp-bower src locale components *.js
 .PHONY: jsmin
 jsmin: $(BUILDS)
 
-.PHONY: cssmin 
-cssmin: stamp-npm
-	$(GRUNT) cssmin
-
 .PHONY: dist
 dist:: build
 
 .PHONY: build
-build:: stamp-npm
-	$(GRUNT) cssmin
+build:: stamp-npm css
 	$(GRUNT) json
 	make jsmin
 

css/converse.css

@@ -2,7 +2,7 @@
  * Converse.js (Web-based XMPP instant messaging client)
  * http://conversejs.org
  *
- * Copyright (c) 2012-2014, JC Brand <jc@opkode.com>
+ * Copyright (c) 2012-2016, JC Brand <jc@opkode.com>
  * Licensed under the Mozilla Public License
  */
 /* 

package.json

@@ -33,10 +33,10 @@
   },
   "devDependencies": {
     "bower": "latest",
+    "clean-css": "^3.4.19",
     "greenkeeper": "^4.0.0",
     "grunt": "^1.0.1",
     "grunt-cli": "^1.1.0",
-    "grunt-contrib-cssmin": "~1.0.1",
     "grunt-json": "^0.2.0",
     "http-server": "^0.9.0",
     "jquery-easing": "0.0.1",

sass/converse.scss

@@ -2,7 +2,7 @@
  * Converse.js (Web-based XMPP instant messaging client)
  * http://conversejs.org
  *
- * Copyright (c) 2012-2014, JC Brand <jc@opkode.com>
+ * Copyright (c) 2012-2016, JC Brand <jc@opkode.com>
  * Licensed under the Mozilla Public License
  */