Module: Clip

Defined in:
lib/clip.rb

Defined Under Namespace

Classes: Flag, IllegalConfiguration, Option, Parser

Constant Summary collapse

VERSION = 
"1.0.1"
HASHER_REGEX = 
/^--?(\w+)/

Class Method Summary collapse

Class Method Details

.hash(argv = ARGV.dup, keys = []) ⇒ Object

Turns ARGV into a hash.

my_clip_script -c config.yml # Clip.hash == { 'c' => 'config.yml' }
my_clip_script command -c config.yml # Clip.hash == { 'c' => 'config.yml' }
my_clip_script com -c config.yml -d # Clip.hash == { 'c' => 'config.yml' }
my_clip_script -c config.yml --mode optimistic
# Clip.hash == { 'c' => 'config.yml', 'mode' => 'optimistic' }

The returned hash also has a remainder method that contains unparsed values.



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# File 'lib/clip.rb', line 419

def self.hash(argv = ARGV.dup, keys = [])
  return @hash if @hash # used the cached value if available

  opts = Clip(argv) do |clip|
    keys = argv.select{ |a| a =~ HASHER_REGEX }.map do |a|
      a = a.sub(HASHER_REGEX, '\\1')
      clip.optional(a[0,1], a); a
    end
  end

  # The "|| true" on the end is for when no value is found for a
  # key; it's assumed that a flag was meant instead of an optional
  # argument, so it's set to true. A bit weird-looking, but more useful.
  @hash = keys.inject({}) { |h, key| h.merge(key => opts.send(key) || true) }

  # module_eval is necessary to define a singleton method using a closure =\
  (class << @hash; self; end).module_eval do
    define_method(:remainder) { opts.remainder }
  end

  return @hash
end

.reset_hash! ⇒ Object

Clear the cached hash value. Probably only useful for tests, but whatever.



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# File 'lib/clip.rb', line 444

def self.reset_hash!; @hash = nil end