ListDirectory generates a slice of all the file names that both exist in the provided directory and pass the filter.

NewPeriodicReconciler creates a PeriodicReconciler that will run recFunc at least every ival, or in response to anything emitted from EventStream.Next().

ParseFilepath expands ~ and ~user constructions.

TrimToDashes takes a slice of strings (e.g.

EventStream generates a channel which will emit an event as soon as one of interest occurs.