add gulp-newer

Author: aispin

.gitignore

@@ -26,3 +26,4 @@ build/Release
 # https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
 node_modules
 public
+.o2

gulp-tasks/imgmin.js

@@ -17,9 +17,14 @@ module.exports = function(){
         .pipe($.ignore.include(function(file){
             return imgRegx.test(file.path);    
         }))
+        .pipe($.newer(dirs.hidden))
         .pipe($.imagemin({
             progressive: true,
             svgoPlugins: [{removeViewBox:false}],
             use:[pngquant()]
-        }));
+        }))
+        // in order to make newer work, we need to put a copy to the hidden folder
+        .pipe(gulp.dest(dirs.hidden))
+        // override the raw files
+        .pipe(gulp.dest(dirs.public));
 };

gulpfile.js

@@ -22,6 +22,7 @@ var gulp    = require('gulp'),
 		css: 'public/css',
 		js: 'public/js',
         temp: 'temp',
+        hidden: '.o2',
 		assetsDir:'public/assets'
 	};
 

package.json

@@ -39,6 +39,7 @@
     "gulp-load-plugins": "^1.1.0",
     "gulp-minify-css": "^1.2.1",
     "gulp-minify-html": "^1.0.4",
+    "gulp-newer": "^1.1.0",
     "gulp-postcss": "^6.0.1",
     "gulp-rename": "^1.2.2",
     "gulp-replace": "^0.5.4",