Class: Statkit::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/statkit/cli.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/statkit/cli.rb', line 6

def initialize()
  setup_parser
end

Instance Method Details

#do_parse(argv) ⇒ Object 



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# File 'lib/statkit/cli.rb', line 20

def do_parse(argv)
  argv = argv.dup
  @parser.parse!(argv)
  @args = argv

  if @args.size < 1
    $stderr.puts("[ERROR] STAT_SPEC is not specified.")
    $stderr.puts("")
    puts(@parser.help)
    exit(false)
  end

  @stat_spec = @args.first

  true
end

#run(argv) ⇒ Object 



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# File 'lib/statkit/cli.rb', line 37

def run(argv)
  do_parse(argv)

  exps = @stat_spec.split().map do |spec|
    case spec
    when "avg"
      ::Statkit::Spec::AvgFuncExp.new
    when "stdev"
      ::Statkit::Spec::StdevFuncExp.new
    when "min"
      ::Statkit::Spec::MinFuncExp.new
    when "max"
      ::Statkit::Spec::MaxFuncExp.new
    else
      raise RuntimeError.new("Unknown function: #{spec}")
    end
  end

  $stdin.each_line do |line|
    val = Float(line)

    exps.each do |exp|
      exp.add_input(val)
    end
  end

  puts(exps.map(&:evaluate).join("\t"))

  true
end

#setup_parser ⇒ Object 



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# File 'lib/statkit/cli.rb', line 10

def setup_parser()
  @parser = OptionParser.new
  @parser.banner = "Usage: statkit [options] STAT_SPEC"

  @parser.on('-h', '--help', 'Show this help.') do
    puts(@parser.help)
    exit(true)
  end
end