Module: CLI::Kit::Args::Tokenizer

Defined in:
lib/cli/kit/args/tokenizer.rb

Defined Under Namespace

Classes: InvalidCharInShortOption, InvalidShortOption, Token

Constant Summary collapse

Error = 
Class.new(Args::Error)

Class Method Summary collapse

Class Method Details

.tokenize(raw_args) ⇒ Object

: (Array raw_args) -> Array



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# File 'lib/cli/kit/args/tokenizer.rb', line 56

def tokenize(raw_args)
  args = []

  mode = :init

  raw_args.each do |arg|
    case mode
    when :unparsed
      args << Token::UnparsedArgument.new(arg)
    when :init
      case arg
      when '--'
        mode = :unparsed
      when /\A--./
        name, value = arg.split('=', 2)
        name = name #: as !nil
        args << Token::LongOptionName.new(
          name[2..-1], #: as !nil
        )
        if value
          args << Token::OptionValue.new(value)
        end
      when /\A-./
        args.concat(tokenize_short_option(
          arg[1..-1], #: as !nil
        ))
      else
        args << if args.last.is_a?(Token::OptionName)
          Token::OptionValueOrPositionalArgument.new(arg)
        else
          Token::PositionalArgument.new(arg)
        end
      end
    end
  end

  args
end

.tokenize_short_option(arg) ⇒ Object

: (String arg) -> Array



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# File 'lib/cli/kit/args/tokenizer.rb', line 96

def tokenize_short_option(arg)
  args = []
  mode = :init
  number = +''
  arg.each_char do |char|
    case mode
    when :numeric
      case char
      when /[0-9]/
        number << char
      else
        raise(InvalidShortOption, arg)
      end
    when :init
      case char
      when /[a-zA-Z]/
        args << Token::ShortOptionName.new(char)
      when /[0-9]/
        mode = :numeric
        number << char
      else
        raise(InvalidCharInShortOption.new(arg, char))
      end
    end
  end
  if number != ''
    args << Token::OptionValue.new(number)
  end
  args
end