Module: Spud::Args

Defined in:
lib/args.rb

Class Method Summary collapse

Class Method Details

.default_options ⇒ Object 



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# File 'lib/args.rb', line 10

def default_options
  {
    debug: false,
    list: false,
    version: false
  }
end

.parse_args(args) ⇒ Object 



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# File 'lib/args.rb', line 29

def parse_args(args)
  options = default_options.dup
  rule_name = nil
  index = 0
  while index < args.length
    arg = args[index]

    if arg[0] != '-'
      rule_name = arg
      index += 1
      break
    end

    options, index = parse_option(options, index, args)
  end

  positional = []
  keyword = {}
  while index < args.length
    arg = args[index]

    if arg[0] == '-'
      value = args[index + 1]
      raise Error, "missing value for arg #{arg}" unless value

      keyword[arg.sub(/^-+/, '').to_sym] = value
      index += 2
    else
      positional << arg
      index += 1
    end
  end

  {
    options: options,
    rule: rule_name,
    positional: positional,
    keyword: keyword
  }
end

.parse_args! ⇒ Object 



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# File 'lib/args.rb', line 6

def parse_args!
  parse_args(ARGV)
end

.parse_option(options, index, args) ⇒ Object 



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# File 'lib/args.rb', line 18

def parse_option(options, index, args)
  arg = args[index]

  case arg
  when '-v', '--version' then [options.merge(version: true), index + 1]
  when '-l', '--list' then [options.merge(list: true), index + 1]
  when '--debug' then [options.merge(debug: true), index + 1]
  else raise Error, "invalid option '#{arg}'"
  end
end