Class: ClOptions

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

Instance Method Summary collapse

Constructor Details

#initialize(obj, options) ⇒ ClOptions

Returns a new instance of ClOptions.



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# File 'lib/cloptions.rb', line 2

def initialize(obj, options)
  @obj = obj
  @options = options
end

Instance Method Details

#handle(args) ⇒ Object 



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# File 'lib/cloptions.rb', line 50

def handle(args)
  @args = [ ]
  i = 0
  while i < args.length
    arg = args[i]
    
    if arg == '--'
      @args.concat args[i+1...args.length]
      break
    elsif m = arg.match(/\A--([a-z]+(-[a-z]+)*)/)
      long_name, option_value = parse_longname(arg, m)
      next_captured = false # next argument may be options argument
      if (option_value == nil) && (i+1 < args.length)
        option_value = args[i+1] 
        next_captured = true
      end
      took_value = handle_options long_name, option_value
      i += 1 if took_value && next_captured 
    elsif arg[0] == '-' 
      short_name, option_value = parse_shortname(arg)
      next_captured = false # next argument may be options argument
      if (option_value == nil) && (i+1 < args.length)
        option_value = args[i+1] 
        next_captured = true
      end
      took_value = handle_options short_name, option_value
      i += 1 if took_value && next_captured 
    else
      @args << arg
    end
    i += 1
  end
  @args
end

#handle_options(name, value) ⇒ Object 



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# File 'lib/cloptions.rb', line 7

def handle_options(name, value)
  puts "inside handle_options, name is " + name.to_s + ", value is " + value.to_s
  took_value = false
  valid = false
  @options.each{|option|
    if (option[:long_name] == name) || (option[:short_name] == name)
      valid = true
      if (option[:takes_value]) && (value == nil)
        raise "option " + name + " requires value"
        break
      elsif option[:takes_value]
        @obj.send(option[:method], value)
        took_value = true
      else
        @obj.send(option[:method])
      end
      break
    end
  }
  raise "Invalid option: " + name if !valid
  took_value
end

#parse_longname(arg, m) ⇒ Object 



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# File 'lib/cloptions.rb', line 30

def parse_longname(arg, m)
  long_name = arg[m.begin(1)...m.end(1)]
  option_value = nil
  if arg[m.end(1)] == '='
    option_value = arg[m.end(1)+1...arg.length]
  end
  return long_name, option_value
end

#parse_shortname(arg) ⇒ Object 



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# File 'lib/cloptions.rb', line 39

def parse_shortname (arg)
  short_name = arg[1]
  option_value = nil
  if arg[2] == '='
    option_value = arg[3...arg.length]
  elsif arg.length > 2
    short_name = arg[1...arg.length]
  end
  return short_name, option_value
end