The code is used in this article.

Your website has probably tons of static files. And for some reason you want those files to be copied over to an s3 bucket.

If you run detect-changes.py (preferably via cron), it will track the static files in your website and if changes are detected it will subsequently run s3-sync.sh which will synchronize your website with your s3 bucket (only the files you specify).

You just need to specify the paths to your folders/files in the scripts. Needless to say if placed in ~/.local/bin you can ditch the scripts' extensions and use them as shell commands too.