OptionBuilder

Cobra-inspired CLI builder on top of stdlib OptionParser.

cmd = OptionBuilder::Command.new("myapp", "My application") do |c|
  c.version "1.0.0"
  c.persistent_flag('v', "verbose", Bool, description: "Verbose output") { |v| @verbose = v }

  c.subcommand("serve", "Start server") do |sub|
    sub.flag('p', "port", Int32, default: 3000, env: "PORT") { |p| @port = p }
    sub.run { puts "Server starting on port #{@port}" }
  end
end
cmd.execute