File Listing Worker

File listing worker is one of the first ones we wrote and continues to be the simplest.

Flow

On working directory getting set the master just calls setupWatch.

• This goes ahead and uses glob to glob the whole directory.
• Sets up a watcher (using chokidar) on this directory to detect any changes

Whenever anything changes it send fileListingDelta to the master (which is also the web server process). That goes ahead and sends it to any connected clients (using our cast) mechanism.