The guide does not give info on the .gemspec file.
In step 4.1 we need to run bundle install, after adding the gem to the gemfile in its host app.
I got a Bundle error message: gemspec file is not valid.
And after running bundle install, my engine is not installed.
AFAIK (I am quite new to RoR) I needed to update the fields with TODO placeholders first. When I ran bundle install afterwards, it installed the engine as expected. (Yay!)
I would like to add this step to the guide, but it would be useful if someone could write a bit more to explain the .gemspec file and what (more) to do with it.
How to proceed?