Method: AppKernel::Function::Options#canonicalize

Defined in:
lib/appkernel/function.rb

#canonicalize(args, errors, augment = true) ⇒ Object

first, exctract all hash options if we find one we love, use it otherwise, if there’s a slurpy option, throw it on the pile otherwise, it’s an error.



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# File 'lib/appkernel/function.rb', line 183

def canonicalize(args, errors, augment = true)
  indexed = @indexed.compact
  positionals, parameters, rest = comb(args)
  unless @greedy
    errors.add(nil,"too many arguments (#{positionals.length} for #{indexed.length})") if positionals.length > indexed.length
    for hash in rest
      for k,v in hash
        errors.add(k, "unknown option '#{k}'")
      end
    end
    return unless errors.empty?
  end
  @presets.dup.tap do |canonical|
    canonical[@greedy.name] = rest if @greedy
    for name,value in parameters
      canonical[name] = @options[name].resolve(value)
    end          
    positionals.length.times do |i|          
      if opt = indexed[i]
        canonical[opt.name] = opt.resolve(positionals[i])
      end
    end
    if @greedy
      canonical[@greedy.name] = @greedy.resolve(rest)
    end          
    if augment
      for k in @defaults
        canonical[k] = @options[k].default unless canonical[k]
      end
      canonical.reject! {|k,v| v.nil? || (@options[k] && @options[k].list? && v.empty?)}
      for k in @required - canonical.keys
        errors.add(k, "missing required option '#{k}'")
      end
    end          
  end      
end