Class: OptionParser

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

Overview

Parser for command line options

Class Method Summary collapse

Class Method Details

.parse(argv) ⇒ Object

Parses ARGV from a Ruby script and returns options as a hash and arguments as a list.

OptionParser.parse(%w(create --username manfred)) #=>
  [{"username"=>"manfred"}, ["create"]]



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# File 'lib/option_parser.rb', line 8

def self.parse(argv)
  return [{},[]] if argv.empty?
  
  options  = {}
  rest     = []
  switch   = nil
  
  for value in argv
    # value is a switch
    if value[0] == 45
      switch = value.slice((value[1] == 45 ? 2 : 1)..-1)
      options[switch] = nil
    else
      if switch
        # we encountered another switch so this
        # value belongs to the last switch
        options[switch] = value
        switch = nil
      else
        rest << value
      end
    end
  end
  
  [options, rest]
end