gistfile1.txt

class Check
  
  def initialize(arg)
   @args = arg
  end
  def args_empty?
    @args.empty?
  end
  
  def dirname?
    if @args.first.split('/').last =~ /^[a-z][a-z\-]*$/
      true
    else
      puts "Only lowercase-letters and '-' allowed in dirname!"
      exit 1
    end    
  end
  
  def exists?
    if File.directory?(@args.first)
      puts "#{@args.first} exists!"
      exit 1
    else
      true
    end
  end
  
  def ok?
    !args_empty? and dirname? and exists?
  end

end