Minifying Ionic app

Minifying_Ionic_app.js

/* jshint ignore:start */
var Promise = require('bluebird');
/* jshint ignore:end */
var purify = require('purify-css');
var glob = require('glob');
var uglify = require('uglify-js');
var fs = require('fs');
var sh = require('shelljs');
var del = require('del');

if ('android' && 'release') {
  // gulp then
  prepareAndroid();
  // then cordova build --release android
  // jarsign
  // zipalign
  // slackcat
  // rm .apk in applicatKeyStore
} else {
  // prepareIos();
}

// After gulp
function prepareAndroid() {
  var doneStates = [];
  var deferred = Promise.pending();
  // purify css
  glob('codes/**/*.{html,js}', function(err, files) {
    if (err) {
      return deferred.reject(err);
    }
    console.log("files :::\n", files);
    console.log('purifying above files, this may take a while, like 2~3 mins');
    var css = ['www/css/ionic.app.all.min.css'];
    var content = files;
    var cssOptions = {
      minify: true,
      output: 'www/css/pissoff.css',
      rejected: true
    };
    purify(content, css, cssOptions);
    deferred.resolve('cssPurificationDone');
  });
  return deferred.promise
    .then(function(message) {
      console.log("message :::\n", message);
      doneStates.push(message);
      // cordova, lib, view, app js uglify
      var deferred = Promise.pending();
      console.log('uglifying js files(cordova,lib,ngTemplate,app), this may take a while, like 1~2 mins');
      var minified = uglify.minify([
        'www/lib/lib.all.min.js',
        'platforms/android/assets/www/cordova.js',
        'www/view/ngTemplates.js',
        'www/js/app.all.min.js',
      ]);
      fs.writeFile('www/js/pissoff.js', minified.code, 'utf8', function(err) {
        if (err) {
          deferred.reject(err);
        } else {
          deferred.resolve('jsUglificationDone');
        }
      });
      return deferred.promise;
    })
    .then(function(message) {
      console.log("message :::\n", message);
      doneStates.push(message);
      // change index.html
      releaseCode();
      return 'indexViewDone';
    })
    .then(function(message) {
      console.log("message :::\n", message);
      doneStates.push(message);
      del.sync([
        'www/css/ionic.app.all.min.css',
        'www/js/app.all.min.js',
        'www/lib/lib.all.min.js',
        'www/view/ngTemplates.js',
      ]);
      return 'fileDeleteDone';
    })
    .then(function(message) {
      console.log("message :::\n", message);
      doneStates.push(message);
      return 'done';
    })
    .catch(function(err) {
      console.log("err :::\n", err);
      if (doneStates.indexOf('indexViewDone') !== -1) {
        devCode();
      }
      return Promise.reject(err);
    });
}

function releaseCode() {
  sh.sed(
    '-i',
    /  <script src="cordova\.js"><\/script>/,
    '  <!-- <script src="cordova.js"></script> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <script src="lib\/lib\.all\.min\.js"><\/script>/,
    '  <!-- <script src="lib/lib.all.min.js"></script> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <script src="view\/ngTemplates.js"><\/script>/,
    '  <!-- <script src="view/ngTemplates.js"></script> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <script src="js\/app\.all\.min\.js"><\/script>/,
    '  <!-- <script src="js/app.all.min.js"></script> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <script src="js\/pissoff\.js"><\/script> -->/,
    '  <script src="js/pissoff.js"></script>',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <link href="css\/ionic\.app\.all\.min\.css" rel="stylesheet">/,
    '  <!-- <link href="css/ionic.app.all.min.css" rel="stylesheet"> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <link href="css\/pissoff\.css" rel="stylesheet"> -->/,
    '  <link href="css/pissoff.css" rel="stylesheet">',
    'www/index.html'
  );
}

function devCode() {
  sh.sed(
    '-i',
    /  <!-- <script src="cordova\.js"><\/script> -->/,
    '  <script src="cordova.js"></script>',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <script src="lib\/lib\.all\.min\.js"><\/script> -->/,
    '  <script src="lib/lib.all.min.js"></script>',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <script src="view\/ngTemplates.js"><\/script> -->/,
    '  <script src="view/ngTemplates.js"></script>',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <script src="js\/app\.all\.min\.js"><\/script> -->/,
    '  <script src="js/app.all.min.js"></script>',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <script src="js\/pissoff\.js"><\/script>/,
    '  <!-- <script src="js/pissoff.js"></script> -->',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <!-- <link href="css\/ionic\.app\.all\.min\.css" rel="stylesheet"> -->/,
    '  <link href="css/ionic.app.all.min.css" rel="stylesheet">',
    'www/index.html'
  );
  sh.sed(
    '-i',
    /  <link href="css\/pissoff\.css" rel="stylesheet">/,
    '  <!-- <link href="css/pissoff.css" rel="stylesheet"> -->',
    'www/index.html'
  );
}