Ruby cli

Param Parsing, Raw

{{ example | no structure |

#!/usr/bin/env ruby

EXECUTABLE = File.basename(__FILE__)

name = "unknown"
age = "unknown"
shift = 0
ARGV.count.times do |index|
  if shift > 0
    shift -= 1
    next
  end

  case ARGV[index]
  when '-h', '--help'
    helpmsg = <<~HELP
    #{EXECUTABLE} [-h]

    DESCRIPTION:
      says hello

    PARAMS:
      -n --name:
        assign a name

    EXAMPLE:
      #{EXECUTABLE} -n my-name

    HELP
    puts(helpmsg)
    exit(0)

  when '-n', '--name'
    name = ARGV[index+1]
    shift += 1

  when '-a', '--age'
    age = ARGV[index+1]
    shift += 1

  else
    puts "error"
    exit(1)

  end

end

puts("hello, #{name} with age #{age}")