A publisher that emits events in the file system.
A typealias and a function are all the exposed interface, the Combine framework provides all remaining functionality.
The publisher is created by a function with two parameters: a file and a set of events; this signature reflects the underlying DispatchSource interface and was adopted for it's simplicity and performance.
The first parameter is a mask containing events of interest. The set of events are defined by a typealias to DispatchSoutce.FileSystemEvent. This type is also the Output of the created publisher, i.e., the type of values to be delivered to subscribers.
The second parameter is a FileDescriptor pointing to an open file, folder or socket.
The package includes a playground with a short example code.