Class: Line::OptionParser

Inherits:
Object
  • Object
show all
Defined in:
lib/line/options_parser.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(arguments) ⇒ OptionParser

Returns a new instance of OptionParser.



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

def initialize(arguments)
  @arguments = arguments
end

Class Method Details

.call(*args) ⇒ Object 



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

def self.call(*args)
  new(*args).call
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/line/options_parser.rb', line 14

def call
  return @options if @options
  self.options = Options.new

  @arguments.each do |arg|
    case arg
    when '-l', '--line-numbers' then options.line_numbers = true
    when '-h', '--help'         then options.show_help    = true
    when '-s', '--strip'        then options.strip        = true
    when '-f', '--force'        then options.force        = true
    when '-c', '--chomp'        then options.chomp        = true
    when '-d', '--debug'        then options.debug        = true
    when '0'                    then invalid_args << arg
    # range
    when /\A-?\d+..-?\d+/
      lower, upper = arg.split('..').map(&:to_i)
      options.indexes   << lower << upper
      positive_matchers << Matchers::Range.new(lower, upper)
    # index
    when /\A-?\d+\Z/
      index = arg.to_i
      options.indexes   << index
      positive_matchers << Matchers::Index.new(index)
    # negated index
    when /\A\^-?\d+\Z/
      index = arg[1..-1].to_i
      options.indexes   << index
      negative_matchers << Matchers::Not.new(Matchers::Index.new(index))
    when /\A\^-?\d+..-?\d+\Z/
      lower, upper = arg[1..-1].split('..').map(&:to_i)
      options.indexes   << lower << upper
      negative_matchers << Matchers::Not.new(Matchers::Range.new(lower, upper))
    else
      invalid_args << arg
    end
  end

  options.errors[:line_numbers] = error_msg_for_line_numbers if error_msg_for_line_numbers
  options.line_matcher          = consolidate_args_to_line_matcher
  options.buffer_size           = [0, *options.indexes].min.abs
  options.help_screen           = help_screen
  options
end