comma package:optparse-applicative

>>> comma
,

Add a command to a subparser option. Suggested usage for multiple commands is to add them to a single subparser. e.g.

sample :: Parser Sample
sample = subparser
( command "hello"
(info hello (progDesc "Print greeting"))
<> command "goodbye"
(info goodbye (progDesc "Say goodbye"))
)

Add a description to a group of commands. Advanced feature for separating logical groups of commands on the parse line. If using the same metavar for each group of commands, it may yield a more attractive usage text combined with hidden for some groups.