From: Intransition <transfire@...>
Date: 2009-11-25T21:30:12+09:00
Subject: Re: Where should I put my config file, and how to load it?



On Nov 24, 11:33 am, Ian Bridgeman <theadmi...@gmail.com> wrote:
> Hello all!
>
> I have a small app/set of libraries I'm developing at work called
> Sweet. I'm distributing it internally as a ruby gem, which is working
> nicely. However I rather foolishly put Sweet's yaml config file in its
> config/ directory, so now every time the gem gets upgraded, it wipes
> out the current settings. Oops! My plan to fix this problem is to
> store the config file at ~/.sweetrc, with a global config file at
> /etc/sweetrc to fall back to if the home directory one isn't
> available. Does this sound like a sensible solution? Or am I going
> mad?

Please, don't use ~/.sweetrc. Be cool and kind and use XDG standard.

  http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
  http://xdg.rubyforge.org/

> The second (and more ruby-ish) question I have is: How can I make sure
> all my classes have access to the contents of the config file? My
> classes all reside within the 'Sweet' module, and ideally I would like
> to be able to do something along the lines of
>
> @data_directory = Sweet::Config['data_directory']

Off the top of my head:

  class Sweet::Config
    DEFAULTS = {... }
    def initialize
       file = XDG.config_find('sweet/config.yaml')
       data = file ? YAML.load(File.new(file)) : {}
       @data = DEFAULTS.merge(data)
    end
    def self.global
       @global ||= new
    end
    def self.[](key)
      global[key.to_s]
    end
  end