Grunt - Is it possible to have a task that only runs once ever?

There is a particular task that I want to run only once and then guarantee that it is never run again. Has anyone done this? I was looking at using grunt.event.once(...), or try and detect folders or files using a shell script on postinstall, but both ways leave a task in the gruntfile.js that could potentially be invoked at any time overwriting files.

At a very simple level it would do something like this:

grunt.registerTask('setup', [
    'mkdir' // run some setup tasks
]);

grunt.event.once('setup', function() {

    // some how do what's below here so it can't be done again 
    // so not available in config for reuse and possibly overwriting
    // modified files

    grunt.task.run([
        'bowercopy:src_codeigniter'
    ]);
});

This even possible in Grunt? I know it's just a task runner, in this case I just want it to run it once.