clear out any unwanted changes since your last commit.

npm install grunt-git-clean --save-dev

Once the plugin has been installed, enable inside your Gruntfile with:

grunt.loadNpmTasks('grunt-git-clean');

In your project's Gruntfile, add a section named git_clean to the data object passed into grunt.initConfig(). grunt git clean doesn't require any additional options to be passed into it's configuration.

grunt.initConfig({
  git_clean: {},
})

The git clean task will first perform a dry run of git clean, showing you what files would be removed from your working directory. (For more information about the underlying git clean command, click here)

$ grunt git_clean

Running "git_clean" task
Would remove lib
Would remove test_script.js

Proceed with removing the above files? (y/n)

You will then be prompted to either perform the proposed clean, or abort.

Aborting:

Proceed with removing the above files? (y/n) n
Files will be kept in working directory.

Done, without errors.

Continue:

Proceed with removing the above files? (y/n) y
Removing lib
Removing test_script.js

Done, without errors.