Improve setup of an authentication key.

lib/current_user.rb

@@ -21,4 +21,12 @@ def identifier_for(user)
     end
   end
   module_function :identifier_for
+
+  def read_authentication_key
+    key_file_path = File.expand_path 'config/current_user/key', Rails.root
+    if File.exist? key_file_path
+      File.open(key_file_path) { |f| f.readline }
+    end
+  end
+  module_function :read_authentication_key
 end

lib/generators/templates/current_user.rb

@@ -1,13 +1,9 @@
 ::CurrentUser.setup do |config|
 
-  # Setup an authentication key
-  # If you want just remove the code block belong and
-  # setup the key: config.authentication_key = '4242424242424242'
-  key_file_path = File.expand_path 'config/current_user/key', Rails.root
-  if File.exist? key_file_path
-    key = File.open(key_file_path) { |f| f.readline }
-    config.authentication_key = key
-  end
+  # Setup an authentication key.
+  # If you want to have a custom key, it might look like:
+  # config.authentication_key = '4242424242424242'
+  config.authentication_key = ::CurrentUser.read_authentication_key
 
   # Setup how users might be distinguished via UI.
   # It might be a symbol, a string or a lambda.

test/dummy/config/initializers/current_user.rb

@@ -1,19 +1,13 @@
 ::CurrentUser.setup do |config|
 
-  # Setup an authentication key
-  # If you want just remove the code block belong and
-  # setup the key: config.authentication_key = '4242424242424242'
-  key_file_path = File.expand_path 'config/current_user/key', Rails.root
-  if File.exist? key_file_path
-    key = File.open(key_file_path) { |f| f.readline }
-    config.authentication_key = key
-  end
+  # Setup an authentication key.
+  # If you want to have a custom key, it might look like:
+  # config.authentication_key = '4242424242424242'
+  config.authentication_key = ::CurrentUser.read_authentication_key
 
   # Setup how users might be distinguished via UI.
   # It might be a symbol, a string or a lambda.
-  # If it is a symbol or a string, there should be
-  # a database column with the same name.
-  # If 'identifier' is lambda it might be written as:
-  # config.identifier = lambda { |u| "User with email '#{u.email}'" }
+  # For the last case it might be:
+  # config.identifier = -> { |u| "User with email #{u.email}" }
   config.identifier = :email
-end
+end