Class: Elm::OptParser

Inherits:
Object
  • Object
show all
Includes:
Contracts::Builtin, Contracts::Core
Defined in:
lib/elm/opt_parser.rb

Overview

Parse command line options

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object 



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# File 'lib/elm/opt_parser.rb', line 18

def self.parse(args)
  options = Options.new

  opt_parser = OptionParser.new do |opts|
    opts.banner = 'Usage: ruby-elm [FILES...] ' \
      '[--output FILE] [--yes] [--report FORMAT] [--warn] [--docs FILE]'

    opts.separator ''
    opts.separator 'Available options:'

    opts.on_tail('-h', '--help',
                 'Show this help text') do
      puts opts
      exit
    end

    opts.on('--output [FILE]',
            'Write result to the given .html or .js FILE.') do |output|
      options.output = output
    end

    opts.on('--yes',
            'Reply \'yes\' to all automated prompts.') do
      options.yes = true
    end

    opts.on('--report [FORMAT]', [:normal, :json],
            'Format of error and warning reports',
            '  (normal or json)') do |format|
      options.report = format
    end

    opts.on('--warn',
            'Report warnings to improve code quality.') do
      options.warn = true
    end

    opts.on('--docs [FILE]',
            'Write documentation to FILE as JSON.') do |doc|
      options.docs = doc
    end

    opts.separator ''
    opts.separator 'Examples:'
  end

  begin
    opt_parser.parse! args
  rescue OptionParser::InvalidOption => err
    raise InvalidOptionError, err.message
  end
  options
end