From cdad483dff4fef1b640dc3c750719c325b252f89 Mon Sep 17 00:00:00 2001
From: Fred Wu <ifredwu@gmail.com>
Date: Wed, 28 Jul 2010 22:55:57 +1000
Subject: [PATCH] Improved how AppGenerator generates the application name. It
 now detects the current app name whenever possible. This means that renaming
 the residing directory will not effect the app name generated by
 AppGenerator.
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[#5225 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>
---
 .../generators/rails/app/app_generator.rb     |  6 ++++-
 .../test/generators/app_generator_test.rb     | 24 +++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/railties/lib/rails/generators/rails/app/app_generator.rb b/railties/lib/rails/generators/rails/app/app_generator.rb
index 96c49a81bb..dd18588b39 100644
--- a/railties/lib/rails/generators/rails/app/app_generator.rb
+++ b/railties/lib/rails/generators/rails/app/app_generator.rb
@@ -356,8 +356,12 @@ module Rails
         @app_name ||= File.basename(destination_root)
       end
 
+      def defined_app_const_base
+        Rails.application.class.name.sub(/::Application$/, "") if Rails.application.instance_of?(Rails::Application)
+      end
+
       def app_const_base
-        @app_const_base ||= app_name.gsub(/\W/, '_').squeeze('_').camelize
+        @app_const_base ||= defined_app_const_base || app_name.gsub(/\W/, '_').squeeze('_').camelize
       end
 
       def app_const
diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 1e0b3bf4c7..21725a380c 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -106,6 +106,30 @@ class AppGeneratorTest < Rails::Generators::TestCase
     assert_file "things-43/config/application.rb", /^module Things43$/
   end
 
+  def test_application_name_is_detected_if_it_exists_and_app_folder_renamed
+    app_root       = File.join(destination_root, "myapp")
+    app_moved_root = File.join(destination_root, "myapp_moved")
+
+    run_generator [app_root]
+
+    Rails.application.config.root = app_moved_root
+    Rails.application.class.stubs(:name).returns("Myapp")
+    Rails.application.stubs(:instance_of?).returns(Rails::Application)
+
+    FileUtils.mv(app_root, app_moved_root)
+
+    # forces the shell to automatically overwrite all files
+    Thor::Base.shell.send(:attr_accessor, :always_force)
+    shell = Thor::Base.shell.new
+    shell.send(:always_force=, true)
+
+    generator = Rails::Generators::AppGenerator.new ["rails"], { :with_dispatchers => true },
+                                                               :destination_root => app_moved_root, :shell => shell
+    generator.send(:app_const)
+    silence(:stdout){ generator.send(:create_config_files) }
+    assert_file "myapp_moved/config/environment.rb", /Myapp::Application\.initialize!/
+  end
+
   def test_application_names_are_not_singularized
     run_generator [File.join(destination_root, "hats")]
     assert_file "hats/config/environment.rb", /Hats::Application\.initialize!/