class Parser

Public Class Methods

parse(argv) click to toggle source
# File lib/euclidean_sequencer/parser.rb, line 4
def self.parse(argv)
  options = Struct.new(:hits, :pulses, :array, :offset)
  args = options.new()

  opt_parser = OptionParser.new do |opts|
    opts.banner = "Usage: euclidean_sequncer [options]"

    opts.on("-h", "--hits=HITS", Integer, "Number of 'on' elements in the sequncer: INTEGER") do |hits|
      args.hits = hits
    end

    opts.on("-pPULSES", "--pulses=PULSES", Integer,  "Total number of elements in the sequncer: INTEGER") do |pulses|
      raise Exception if pulses.nil?
      args.pulses = pulses
    end

    opts.on("-a", "--array=TRUE", FalseClass, "Output as array (optional): BOOLEAN") do |array|
      args.array = array
    end

    opts.on("-o", "--offset=OFFSET", Integer, "Number elements left shifted in the sequence (optional): INTEGER") do |offset|
      args.offset = offset
    end

    opts.on("-?", "--help", "Prints this help") do
      puts opts
      exit
    end
  end

  begin
    opt_parser.parse!(argv)
  rescue Exception => error
    printf("ERROR: %s \n", error)
    opt_parser.parse!(["--help"])
    exit 1
  end

  return args
end