add grunt size task

Author: yyx990803

.gitignore

@@ -4,4 +4,5 @@ node_modules
 components
 explorations
 test/vue.test.js
-test/vue.test-cov.js
+test/vue.test-cov.js
+dist/vue.min.js.gz

Gruntfile.js

@@ -6,7 +6,7 @@ module.exports = function( grunt ) {
 
     grunt.initConfig({
 
-        pkg: grunt.file.readJSON('package.json'),
+        version: grunt.file.readJSON('package.json').version,
 
         componentbuild: {
             build: {
@@ -95,7 +95,9 @@ module.exports = function( grunt ) {
 
     grunt.registerTask( 'default', [
         'jshint',
-        'test'
+        'test',
+        'uglify',
+        'size'
     ])
 
 }

tasks/release.js

@@ -53,6 +53,7 @@ module.exports = function (grunt) {
                     'test',
                     'version:' + next,
                     'uglify',
+                    'size',
                     'git:' + next
                 ])
             }

tasks/size.js

@@ -0,0 +1,31 @@
+var fs = require('fs'),
+    zlib = require('zlib'),
+    min = 'dist/vue.min.js',
+    gz = 'dist/vue.min.js.gz'
+
+module.exports = function (grunt) {
+
+    grunt.registerTask('size', function () {
+
+        var done = this.async()
+
+        fs.createReadStream(min)
+            .pipe(zlib.createGzip())
+            .pipe(fs.createWriteStream(gz))
+            .on('finish', compareSizes)
+
+        function compareSizes () {
+            var minSize = (fs.statSync(min).size / 1024).toFixed(2),
+                gzSize = (fs.statSync(gz).size / 1024).toFixed(2)
+            console.log(
+                '\n\x1b[1m\x1b[34m' +
+                'File Sizes:'+
+                '\x1b[39m\x1b[22m'
+            )
+            console.log('Min  : ' + minSize + 'kb')
+            console.log('Gzip : ' + gzSize + 'kb')
+            done()
+        }
+    })
+
+}