require "clim"

class MyCli < Clim
  main do
    run do |opts, args|
      puts "#{args.join(", ")}!"
    end
  end
end

MyCli.start(ARGV)

require "clim"

module Hello
  class Cli < Clim
    main do
      desc "Hello CLI tool."
      usage "hello [options] [arguments] ..."
      version "Version 0.1.0"
      option "-g WORDS", "--greeting=WORDS", type: String, desc: "Words of greetings.", default: "Hello"
      option "-n NAME", "--name=NAME", type: Array(String), desc: "Target name.", default: ["Taro"]
      run do |opts, args|
        print "#{opts.greeting}, "
        print "#{opts.name.join(", ")}!"
        print "\n"
      end
    end
  end
end

Hello::Cli.start(ARGV)

require "clim"

module FakeCrystalCommand
  class Cli < Clim
    main do
      desc "Fake Crystal command."
      usage "fcrystal [sub_command] [arguments]"
      run do |opts, args|
        puts opts.help # => help string.
      end
      sub "tool" do
        desc "run a tool"
        usage "fcrystal tool [tool] [arguments]"
        run do |opts, args|
          puts "Fake Crystal tool!!"
        end
        sub "format" do
          desc "format project, directories and/or files"
          usage "fcrystal tool format [options] [file or directory]"
          run do |opts, args|
            puts "Fake Crystal tool format!!"
          end
        end
      end
      sub "spec" do
        desc "build and run specs"
        usage "fcrystal spec [options] [files]"
        run do |opts, args|
          puts "Fake Crystal spec!!"
        end
      end
    end
  end
end

FakeCrystalCommand::Cli.start(ARGV)

require "clim"

class MyCli < Clim

  # ...

end

class MyCli < Clim
  main do
    desc "My Command Line Interface."
    run do |opts, args|
      # ...
    end
  end
end

class MyCli < Clim
  main do
    usage  "mycli [sub-command] [options] ..."
    run do |opts, args|
      # ...
    end
  end
end

class MyCli < Clim
  main do
    run do |opts, args|
      # ...
    end
    sub "sub" do
      alias_name  "alias1", "alias2"
      run do |opts, args|
        puts "sub_command run!!"
      end
    end
  end
end

class MyCli < Clim
  main do
    version "mycli version: 1.0.1"
    run do |opts, args|
      # ...
    end
  end
end

class MyCli < Clim
  main do
    version "mycli version: 1.0.1", short: "-v"
    run do |opts, args|
      # ...
    end
  end
end

class MyCli < Clim
  main do
    option "--greeting=WORDS", desc: "Words of greetings.", default: "Hello"
    option "-n NAME", "--name=NAME", type: Array(String), desc: "Target name.", default: ["Taro"]
    run do |opts, args|
      puts typeof(opts.greeting) # => String
      puts typeof(opts.name)     # => Array(String)
    end
  end
end

class MyCli < Clim
  main do
    option "-v", "--verbose", type: Bool, desc: "Verbose."
    run do |opts, args|
      puts typeof(opts.verbose) # => Bool
    end
  end
end

class MyCli < Clim
  main do
    option "-n", type: String, desc: "name."  # => short name only.
    option "--my-age", type: Int32, desc: "age." # => long name only.
    run do |opts, args|
      puts typeof(opts.n)      # => (String | Nil)
      puts typeof(opts.my_age) # => (Int32 | Nil)
    end
  end
end

class MyCli < Clim
  help_template do |desc, usage, options_help, sub_commands_help|
    <<-MY_HELP

      command description: #{desc}
      command usage:       #{usage}

      options:
    #{options_help}

      sub_commands:
    #{sub_commands_help}


    MY_HELP
  end
  main do
    desc "foo command."
    usage "foo [options] [arguments]"
    option "--site=SITE", type: String, desc: "Site URL."
    run do |opts, args|
    end
    sub "sub_command" do
      desc "this is sub_comand."
      option "-n NUM", type: Int32, desc: "Number.", default: 0
      run do |opts, args|
      end
    end
  end
end

class MyCli < Clim
  main do
    run do |opts, args|
      opts.help # => help string
    end
  end
end