Class: Ru::Process

Inherits:
Object
  • Object
show all
Defined in:
lib/ru/process.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Process

Returns a new instance of Process.



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# File 'lib/ru/process.rb', line 5

def initialize(options={})
  @command_manager = CommandManager.new
  @option_printer = OptionPrinter.new
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/ru/process.rb', line 10

def run
  output = process_options
  return output if output

  args = ARGV
  first_arg = args.shift

  if first_arg == 'list'
    commands = @command_manager.all
    if commands.present?
      lines = ['Saved commands:']
      lines += commands.sort_by(&:first).map { |name, code| "#{name}\t#{code}" }
    else
      lines = [
        'No saved commands. To save a command, use `save`:',
        "ru save sum 'map(:to_i).sum'"
      ]
    end
    return lines.join("\n")
  elsif first_arg == 'run'
    name = args.shift
    @code = @command_manager.get(name)
    if @code.blank?
      STDERR.puts "Unable to find command '#{name}'"
      exit 1
      return
    end
  elsif first_arg == 'save'
    name = args[0]
    code = args[1]
    @command_manager.save(name, code)
    return "Saved command: #{name} is '#{code}'"
  elsif first_arg.blank?
    STDERR.puts @option_printer.run(:help)
    exit 1
    return
  else
    @code = first_arg
  end

  @stdin = get_stdin(args) unless @code.start_with?('! ')
  @code = prepare_code(@code) if @code

  lines = []
  unless @stdin.nil?
    # Prevent 'invalid byte sequence in UTF-8'
    @stdin.encode!('UTF-8', 'UTF-8', :invalid => :replace)
    lines = @stdin.split("\n")
  end
  array = Ru::Array.new(lines)
  output = array.instance_eval(@code) || @stdin
  output = prepare_output(output)
  output
end