load_sass_variables.rb

# Throw this in config/initializers and add
# @import variables.sass to the top of application.sass
# to have all variables in app_config.yml
# available as variables in your sass stylesheets
# 
# First draft by unixmonkey (http://gist.github.com/323198)
# flatten() added by Raphael J. Schmid <raphael.schmid@gmail.com>
# Full re-write. Configuration function added and can be used in compass/sass
#
# Example configuration.yaml
#
#  foo: 1
#  bar: 
#    baz: 2
#
# Example any.scss
#
#  $qux: configuration(bar-baz); // qux === 2
#  $quz: configuration(foo);     // foo === 1
#

require 'yaml'

configurationFile    = YAML.load_file('configuration.yaml')
$configurationObject = {}

def process_hash(translations, current_key, hash)
  hash.each do |new_key, value|
    combined_key = [current_key, new_key].delete_if { |k| k == '' }.join("-")
    if value.is_a?(Hash)
      process_hash(translations, combined_key, value)
    else
      translations[combined_key] = value
    end
  end
end

process_hash($configurationObject, '', configurationFile['default']['layout'])

module Sass::Script::Functions

    def configuration(option)
        value = $configurationObject[option.to_s]
        if(value.is_a?(String))
            Sass::Script::Value::String.new(value.to_s)
        elsif (value.is_a?(Integer))
            Sass::Script::Value::Number.new(value.to_i)
        end
    end

end