Purify doesnt seem to work as expected??

package.json

@@ -36,6 +36,7 @@
     "gulp-notify": "*",
     "gulp-plumber": "*",
     "gulp-print": "*",
+    "gulp-purifycss": "*",
     "gulp-rename": "*",
     "gulp-replace": "*",
     "gulp-rtlcss": "*",
@@ -68,6 +69,7 @@
     "gulp-plumber": "^1.0.1",
     "gulp-print": "^1.1.0",
     "gulp-prompt": "^0.1.2",
+    "gulp-purifycss": "^0.2.0",
     "gulp-rename": "^1.2.2",
     "gulp-replace": "^0.5.3",
     "gulp-rtlcss": "^0.1.4",

semantic.json.example

@@ -2,6 +2,7 @@
   "base": "",
 
   "paths": {
+    "purify": false,
     "source": {
       "config"      : "src/theme.config",
       "definitions" : "src/definitions/",

tasks/build/css.js

@@ -19,6 +19,7 @@ var
   minifyCSS    = require('gulp-minify-css'),
   plumber      = require('gulp-plumber'),
   print        = require('gulp-print'),
+  purifyCSS    = require('gulp-purifycss'),
   rename       = require('gulp-rename'),
   replace      = require('gulp-replace'),
 
@@ -57,10 +58,13 @@ module.exports = function(callback) {
     return;
   }
 
+  console.log(config.purify);
+
   // unified css stream
   stream = gulp.src(source.definitions + '/**/' + globs.components + '.less')
     .pipe(plumber(settings.plumber.less))
     .pipe(less(settings.less))
+    .pipe(gulpif(config.purify, purifyCSS(config.purify)))
     .pipe(autoprefixer(settings.prefix))
     .pipe(replace(comments.variables.in, comments.variables.out))
     .pipe(replace(comments.license.in, comments.license.out))

tasks/config/defaults.js

@@ -23,6 +23,9 @@ module.exports = {
     theme    : 'src/theme.config'
   },
 
+  // Array of paths to run purify-css against
+  purify: false,
+
   // folder paths
   paths: {
     source: {

tasks/watch.js

@@ -19,6 +19,7 @@ var
   plumber      = require('gulp-plumber'),
   print        = require('gulp-print'),
   rename       = require('gulp-rename'),
+  purifyCSS    = require('gulp-purifycss'),
   replace      = require('gulp-replace'),
   uglify       = require('gulp-uglify'),
   util         = require('gulp-util'),
@@ -138,6 +139,8 @@ module.exports = function(callback) {
 
       if( fs.existsSync(lessPath) ) {
 
+        console.log(config.purify);
+
         // unified css stream
         stream = gulp.src(lessPath)
           .pipe(plumber(settings.plumber.less))
@@ -148,6 +151,7 @@ module.exports = function(callback) {
           .pipe(replace(comments.large.in, comments.large.out))
           .pipe(replace(comments.small.in, comments.small.out))
           .pipe(replace(comments.tiny.in, comments.tiny.out))
+          .pipe(gulpif(config.purify, purifyCSS(config.purify)))
           .pipe(autoprefixer(settings.prefix))
           .pipe(gulpif(config.hasPermission, chmod(config.permission)))
         ;