Pass options hash to Rake

Rakefile

module RakeOptionParser
  def self.parse(args)
    args.extras.each_with_object({}) do |arg, result|
      key, value = arg.split(/:\s*/, 2)
      result[key.to_sym] = value
    end
  end
end

namespace :foo do
  task :bar, [] => :environment do |t, args|
    options = RakeOptionParser.parse(args)
    p options
  end
end

Usage

$ rake 'foo:bar[baz:1,quux:test]'
{:baz=>"1", :quux=>"test"}