Writing a CLI

Cross-language guide for writing a command-line interface - focussing on the interface and help messaging.

Arguments

Subcommands

Subcommands:
  foo
  bar
  baz, b       Baz all the bugs.

Options

One argument

-f, --foo FOO

Optional argument

-f, --foo [FOO]   Your foo value.  (defaults to bar)

One or more arguments

--foo FOO[,FOO2,...]

Short and long flag

-f, --FOO FOO