Built a DSL for faster writing of single-file scripts

[gillisd]

@postmodern thanks for all your hard work on this project. I discovered it through Ronin and love your eye for great design.

I write a lot of shorter, single-file scripts, and have been trying to find a way to get both multi-command support and a fast workflow. CommandKit, while incredibly robust and feature rich, requires some setup for new utilities, and I found myself longing for an expressive DSL like rake. So I built one around command_kit - would love your thoughts/feedback.

Compare this to the traditional approach requiring separate classes and files:

cli :colors do
  command :primaries do
    run do
      puts [:red, :blue, :yellow]
    end
  end
  
  command :mix do
    option :red, desc: 'the color red'
    option :yellow, desc: 'the color yellow'
    option :blue, desc: 'the color blue'

    run do
      result = (
        case options
        in { red:, yellow: } then :orange
        in { red:, blue: } then :purple
        in { blue:, yellow: } then :green
        else
          options.keys
        end
      )

      puts result
    end
  end
end

$ colors

Usage: colors [options] [COMMAND [ARGS...]]

Options:
    -h, --help                       Print help information

Arguments:
    [COMMAND]                        The command name to run
    [ARGS ...]                       Additional arguments for the command

Commands:
    help
    mix
    primaries

It mainly just adds the methods :cli and :command, and then supports all of the original command_kit dsl methods inside the :command blocks - so you get the full power of command_kit with rake-like expressiveness for quick scripts.

Here is the implementation.