class that accepts a yaml file and dynamically creates getters/setters for each yaml key

yaml_reader.rb

class YAMLReader
  def initialize yaml_file_path
    YAML.load_file(yaml_file_path).each do |key, value|
      self.class.instance_eval do
        attr_accessor :"#{key}"
      end
      self.send "#{key}=", value
    end
  end
end

Have you thought about using OpenStruct? It'll basically do the same thing you have done here. You could write your reader class like this:

class YAMLReader < OpenStruct
  def initialize yaml_file_path
    super(YAML.load_file(yaml_file_path))
  end
end

Here's a more complete version. The only problem is, dumping and/or saving will convert yaml keys to symbols, but it's way past bedtime. :)

require 'ostruct'
require 'yaml'

class YAMLReader < OpenStruct
  def initialize yaml_file_path
    @file_path = yaml_file_path
    super(YAML.load_file(@file_path))
  end

  def dump
    marshal_dump.to_yaml
  end

  def save
    save_as @file_path
  end

  def save_as(new_file_path)
    File.open( new_file_path, 'w' ) do |out|
      YAML.dump( marshal_dump, out )
    end
  end

end

@postpostmodern that certainly helped clean things up a bit: wyattdanger/YAML-Reader@a6e1ab5