Test against subdirectory environment

[hanachin]

Redmine may run in a subdirectory environment.
https://www.redmine.org/projects/redmine/wiki/HowTo_Install_Redmine_on_subdirectory_(sub-URI)_on_Apache

I sometimes write bugs that only occur in a subdirectory environment.
For example, sending a request to / using JavaScript.

So I want to run my feature spec(or system test) against subdirectory environment.

TODO

• Add apply-patch-subdirectory command to apply the following patch.

diff --git a/config.ru b/config.ru
index 5bc2a619e..e30b85ece 100644
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,7 @@
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)
-run Rails.application
+
+map '/redmine' do
+  run Rails.application
+end
diff --git a/config/initializers/relative_url_root.rb b/config/initializers/relative_url_root.rb
new file mode 100644
index 000000000..6438db43e
--- /dev/null
+++ b/config/initializers/relative_url_root.rb
@@ -0,0 +1 @@
+Redmine::Utils::relative_url_root = "/redmine"