So currently there's no way to automatically get Rake tasks from your
Issue and discussion here:
You'll note that the idea is not to require the environment (in order
to figure out what gems the project is using). I'm thinking this could
be solved by suggesting the use of a separate initializer for gems
(that was my original idea with gems.yml). This way we keep the best
of both worlds: a separate file with a clear purpose and the fact that
it's Ruby code.
If we do this, then I guess we could just load that initializer (if it
exists) passing a config object and figure out which gems are
installed and then add their rails/tasks to Rake.