make it rails independent

lib/seedbank.rb

@@ -3,10 +3,14 @@
 
 module Seedbank
   class << self
-    attr_writer :seeds_root, :nesting, :matcher
+    attr_writer :application_root
+
+    def application_root
+      @application_root ||= Pathname.new(Rake.application.original_dir)
+    end
 
     def seeds_root
-      @seeds_root ||= 'db/seeds'
+      @seeds_root ||= File.join(application_root, 'db', 'seeds')
     end
 
     def nesting
@@ -19,8 +23,8 @@ def matcher
   end
 
   def self.load_tasks
-    Dir[File.expand_path("tasks/*.rake", File.dirname(__FILE__))].each { |ext| load ext }
+    Dir[File.expand_path('../tasks/*.rake', __FILE__)].each { |ext| load ext }
   end
 
   require 'seedbank/railtie' if defined?(Rails) && Rails::VERSION::MAJOR >= 3
-end
+end

lib/seedbank/dsl.rb

@@ -25,9 +25,7 @@ def define_seed_task(seed_file, *args)
           runner.evaluate(seed_task, seed_file) if File.exist?(seed_file)
         end
 
-        # TODO: Stop being so dependent on Rails.root
-        # perhaps set Seedbank.application_root instead
-        relative_file = Pathname.new(seed_file).relative_path_from(Rails.root)
+        relative_file = Pathname.new(seed_file).relative_path_from(Seedbank.application_root)
 
         task.add_description "Load the seed data from #{relative_file}"
         add_environment_dependency(task)

lib/seedbank/railtie.rb

@@ -1,9 +1,7 @@
 module Seedbank
   class Railtie < Rails::Railtie
-
     rake_tasks do
-      Seedbank.seeds_root = File.expand_path('db/seeds', Rails.root)
       Seedbank.load_tasks
     end
   end
-end
+end

lib/tasks/seed.rake

@@ -20,10 +20,9 @@ namespace :db do
     # Then create a task for the environment
     glob_seed_files_matching('/*/').each do |directory|
       environment = File.basename(directory)
-
       environment_dependencies = glob_seed_files_matching(environment, Seedbank.matcher).sort.map { |seed_file| seed_task_from_file(seed_file) }
 
-      desc "Load the seed data from db/seeds.rb, db/seeds/*.seeds.rb and db/seeds/#{environment}/#{Seedbank.matcher}."
+      desc "Load the seed data from db/seeds.rb, db/seeds/#{Seedbank.matcher} and db/seeds/#{environment}/#{Seedbank.matcher}."
       task environment => ['db:seed:common'] + environment_dependencies
 
       override_dependency << "db:seed:#{environment}" if defined?(Rails) && Rails.env == environment

test/test_helper.rb

@@ -9,7 +9,7 @@
 
 Rails.backtrace_cleaner.remove_silencers!
 
-Seedbank.seeds_root = File.expand_path('dummy/db/seeds', __FILE__)
+Seedbank.application_root = Pathname.new(File.expand_path('../dummy', __FILE__))
 
 class Seedbank::Spec < MiniTest::Spec
   def setup