Module: Lucy::Goosey

Defined in:
lib/lucy-goosey.rb,
lib/lucy-goosey/version.rb

Defined Under Namespace

Classes: OptionsHash

Constant Summary collapse

UNIX_SINGLE_FLAG = 
/^-/
UNIX_DOUBLE_FLAG = 
/^--/
EQUAL = 
/=/
VERSION = 
"0.4.0"

Class Method Summary collapse

Class Method Details

.deflag(word) ⇒ Object 



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# File 'lib/lucy-goosey.rb', line 29

def self.deflag(word)
  word.sub(UNIX_DOUBLE_FLAG, '').sub(UNIX_SINGLE_FLAG,'')
end

.flag?(word) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lucy-goosey.rb', line 24

def self.flag?(word)
  return unless word
  word.match(UNIX_DOUBLE_FLAG) || word.match(UNIX_SINGLE_FLAG)
end

.magic_word?(word) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lucy-goosey.rb', line 19

def self.magic_word?(word)
  return unless word
  (self.flag?(word) || word.match(EQUAL))
end

.parse(_args) ⇒ Object 



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# File 'lib/lucy-goosey.rb', line 33

def self.parse(_args)
  self.parse_options(_args)
end

.parse_options(_args) ⇒ Object

Public: parses array of options, loosely assuming unix-style conventions.

Returns a Hash

Raises:

  • (ArgumentError) 


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# File 'lib/lucy-goosey.rb', line 40

def self.parse_options(_args)
  args = _args.dup
  options = OptionsHash.new
  options.argv = _args.dup

  raise ArgumentError, 'must be an array' unless args.is_a? Array
  return options if args.empty?

  args.reverse!
  # get rid of leading words
  args.pop while args.last && !magic_word?(args.last)

  args.size.times do
    break if args.empty?
    head = args.pop
    peek = args.last

    key, value = nil, nil
    if head.match(/=/)
      key, value = head.split('=', 2)
    elsif peek.nil? || magic_word?(peek)
      key, value  = head, true
    elsif peek
      key, value = head, [args.pop]
      value << args.pop while (args.last && !magic_word?(args.last))
      value = value.join(' ')
    end
    next unless key and value

    key = deflag(key)
    options[key] = value
  end

  options
end