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module Envyable
# Internal: Loads yaml files into ENV (or a supplied hash).
class Loader
# Internal: Returns the String or Pathname path of the loader
attr_reader :path
# Internal: Returns the Hash loadable of the loader
attr_reader :loadable
# Internal: initalize a Loader
#
# path - a Pathname or String that describes where the yaml file
# resides.
# loadable - a Hash or hashlike structure that the yaml file variables
# should be loaded into (default: ENV).
def initialize(path, loadable = ENV)
@path = path
@loadable = loadable
end
# Internal: perform the loading from the given environment
#
# environment - a String describing the environment from which to load the
# variables (default: development).
#
# Examples
#
# load('production')
#
# Returns nothing.
def load(environment = 'development')
if @yml ||= load_yml
@yml.each { |key, value| set_value(key, value) }
if @yml[environment]
@yml[environment].each { |key, value| set_value(key, value) }
end
end
end
private
def load_yml
yml_path = File.expand_path(@path)
return nil unless File.exist?(yml_path)
YAML.load_file(yml_path)
end
def set_value(key, value)
@loadable[key.to_s] = value.to_s unless value.is_a?(Hash)
end
end
end
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