Tests for CLI

[chshersh]

CLI guidelines suggestion the following convention for named arguments:

• Every short flag must have long version as well
• Don’t have ambiguous or similarly-named commands. For example, having two subcommands called “update” and “upgrade” is quite confusing. You might want to use different words, or disambiguate with extra words.
• The given parser doesn't try to parse pre-defined parsers: --help, --version, --numeric-version, etc.

Is it possible to check such things with optparse-applicative? 🤔

[zetkez]

Hi, its possible to check all three points. In optparse-applicative-common are low level function which can be used to check all three points.
mapParser (\_ x -> optionNames . optMain $ x) sampleParser gives the list of defined parsers.

What can be done here for this ticket?