> The point I'm trying to make is that there is no need for exposing so much details to extension developers.
There is. Engine has a longer initialization process, more objects involved, etc. Why would you submit your app to a longer initialization process when there is no need to? Railties provides all the tools you could use to customize a Rails application. An Engine is a Railtie with all the capabilities you would have in an Application (app, assets, routes, migrations, etc). All these things are plugins. A gem is how you package a plugin. > But the explanation above didn't talked about what a Railtie really is. What would it be useful for? Read the Railtie docs or search for examples on github.com, there are plenty. > By the way I don't get why 's.add_development_dependency "sqlite3"' is added to gemspec when -O is specified. It is a bug. Patches are welcome. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-core/-/T7jzZqPRX5wJ. To post to this group, send email to rubyonrails-core@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-core+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-core?hl=en.