Grunt scripts:exist task

gistfile1.txt

  grunt.registerTask('scripts:exist',function(){
    var filesList = grunt.template.process('<%= build.dist.js.dest %>').split(',');

    // console.log(filesList);
    var done = this.async();
    var interval;

    var validate = function(){

      var missedFiles = [];
      var validatedFile = [];

      filesList.forEach(function(file){
        var exists = grunt.file.exists(file);
        // console.log(file+" exist: "+exists);
        if(!exists){
          missedFiles.push(file);
        }else{
          validatedFile.push(file);
        }
      });

      validatedFile.forEach(function(file){
        grunt.verbose.ok(file+'  generation validated.');
      });

      missedFiles.forEach(function(file){
        grunt.log.error(file+' not generated!');
      });

      if(missedFiles.length<1){
        clearInterval(interval);
        done();
      }
    };

    setInterval(validate,50)



  })