First I like to explain why I would like to have Bitnami Redmine with Ruby 1.9. Here we use quite heavily the redmine_wiki_extensions plugin. Because I want to upgrade my Redmine 1.3.1 to 2.1.2, I also have to use the latest version 0.6.0 of this plugin (only it is compatible). This plugin depends on the gem factory_girl_rails (which itself depends on factory_girl) and simplecov.
All newer versions of factory_girl_rails only runs with Ruby 1.9. Finding an older version of factory_girl_rails wasn't so difficult, 1.7.0 was the last version supporting Ruby 1.8. But there is no backward compatible version of simplecove. It says that it relies on a library which is available only in Ruby 1.9. So this is the reason why we need to have a Redmine with Ruby 1.9.
I have discovered some other questions about this, like there and there. Are there any new developments on Bitnami Redmine and Ruby 1.9? There must be a way to integrate Ruby 1.9 in the Bitnami Redmine Stack. I need only some hints on how to do it myself. Can you help me please?