auto_create_ts grunt task for auto append timestamp to static files

v1.js

  grunt.registerMultiTask('auto_create_ts', 'The best Grunt plugin ever.', function() {
    function replaceAssets(fileSrc) {
      //read page file data
      var htmlData = grunt.file.read(fileSrc);
      
      //get the full asset text, like "text/javascript" src="js/hello.js?auto_create_ts=3232323233"
      // console.log(/(".*?auto_create_ts=)(\d+)([\"|\'])/g.test(htmlData));

      var newdata = htmlData.replace(/(".*?auto_create_ts=)(\d+)([\"|\'])/g, "$1" + (Math.round(+new Date() / 1000)) + "$3");

      if (grunt.file.write(fileSrc, newdata)) {
        grunt.log.success(fileSrc + ' add ts successfully');
      } else {
        grunt.log.error(fileSrc + ' add ts failed');
      }

    }

    // Iterate over all specified file groups.
    this.files.forEach(function(f) {
      // Concat specified files.

      console.log(f.dest);
      var src = f.src.filter(function(filepath) {
        console.log(filepath);
        return;
        // Warn on and remove invalid source files (if nonull was set).
        if (!grunt.file.exists(filepath)) {
          grunt.log.warn('Source file "' + filepath + '" not found.');
          return false;
        } else {
          replaceAssets(filepath);
          return true;
        }
      });

    });
  });