Small config manager.

config.rb

class Config
  def initialize
    @config = {}
  end

  def load_file(file_name)
    instance_eval(File.read(file_name))
    self
  end
    
  def set(key, value)
    @config[key.to_sym] = value
  end

  def get(key)
    @config[key] 
  end

  def delete(key)
    @config.delete key.to_sym
  end

  def exists?(key)
    @config.has_key? key
  end

  private

  def method_missing(sym, *args)
    if args.length == 0 && @config.has_key?(sym)
      get(sym)
    end
  end
end

gistfile2.rb

config = Config.new
config.load_file File.join(File.dirname(__FILE__), "sample.rb")

config.get(:foo) #=> "bar"
config.get(:save_path) #=> "/var/www/download"

sample.rb

set :foo, "bar"
set :web_path, "/var/www"
set :save_path, File.join(web_path, "download")