OptionParser

WARNING
This package has been obsoleted by the Swift Argument Parser package, which implements a far better approach. This package is preserved for posterity, but it is not being maintained. Using it isn’t recommended in new Swift code, and I encourage maintainers of existing code that imports it to consider upgrading to Argument Parser.

OptionParser is a Swift 4 package that helps you parse command-line arguments, with a declarative(-ish) interface.