What version of Rake does Heroku Cedar use?
My gemfile is at version 10.0.2 which the deployment code confirms is bundling on Heroku:
Installing rake (10.0.2)
But the app won’t start, and running heroku run rake db:migrate --app appname or looking at the heroku logs --tail gives me /app/vendor/bundle/ruby/1.9.1/gems/rake-10.0.2/lib/rake.rb:24:in 'require': no such file to load -- rake/version (LoadError)
rakeis not pre-installed on Cedar, you just have an empty container. All the dependencies are brought in from your application (e.g Bundler).