Load config/preinitializer.rb, if present, before loading the environment. Closes #9943.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8159 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/CHANGELOG

 *SVN*
 
+* Load config/preinitializer.rb, if present, before loading the environment.  #9943 [Chad Woolley]
+
 * FastCGI handler ignores unsupported signals like USR2 on Windows.  [Grzegorz Derebecki]
 
 * Only load ActionMailer::TestCase if ActionMailer is loaded.  Closes #10137 [defunkt]

railties/environments/boot.rb

@@ -6,7 +6,10 @@
 module Rails
   class << self
     def boot!
-      pick_boot.run unless booted?
+      unless booted?
+        preinitialize
+        pick_boot.run
+      end
     end
 
     def booted?
@@ -20,6 +23,14 @@ def pick_boot
     def vendor_rails?
       File.exist?("#{RAILS_ROOT}/vendor/rails")
     end
+
+    def preinitialize
+      load(preinitializer_path) if File.exists?(preinitializer_path)
+    end
+
+    def preinitializer_path
+      "#{RAILS_ROOT}/config/preinitializer.rb"
+    end
   end
 
   class Boot

railties/test/boot_test.rb

@@ -11,12 +11,29 @@ def test_boot_returns_if_booted
     assert_nil Rails.boot!
   end
 
-  def test_boot_picks_and_runs_if_not_booted
+  def test_boot_preinitializes_then_picks_and_runs_if_not_booted
     Rails.expects(:booted?).returns(false)
+    Rails.expects(:preinitialize)
     Rails.expects(:pick_boot).returns(mock(:run => 'result'))
     assert_equal 'result', Rails.boot!
   end
 
+  def test_preinitialize_does_not_raise_exception_if_preinitializer_file_does_not_exist
+    Rails.stubs(:preinitializer_path).returns('/there/is/no/such/file')
+
+    assert_nothing_raised { Rails.preinitialize }
+  end
+
+  def test_load_preinitializer_loads_preinitializer_file
+    Rails.stubs(:preinitializer_path).returns("#{File.dirname(__FILE__)}/fixtures/environment_with_constant.rb")
+
+    assert_nil $initialize_test_set_from_env
+    Rails.preinitialize
+    assert_equal "success", $initialize_test_set_from_env
+  ensure
+    $initialize_test_set_from_env = nil
+  end
+
   def test_boot_vendor_rails_by_default
     Rails.expects(:booted?).returns(false)
     File.expects(:exist?).with("#{RAILS_ROOT}/vendor/rails").returns(true)