Deploy different configuration per stage with Capistrano (with the multi-stage extension).
The 0.x releases of this gem are unstable, and the API/usage may change significantly, even in minor version increments.
Add this line to your application's Gemfile:
gem 'capifig'
Add the following line to your Capistrano Capfile:
require 'capifig/capistrano3'
Add the following line to your Capistrano config/deploy.rb:
require 'capifig/capistrano'
For each stage, create a folder in config/deploy/<stage>, containing all the config files specific to that
stage. On deployment (after deploy:update_code), these files will be copied to your app's root. Subfolders may be used,
but must already exist on the server. For example, if you have a folder config/deploy/production/dbconfig, you
also need a folder dbconfig in the root of your app.