Recent Bundler (1.16.1) started complaining about missing dependencies in the Gemfile. This is due to a stricter handling of specifications (see attached link).
The error message looks like this:
Downloading example-gem-1.2.3 revealed dependencies not in the API or the lockfile (other-gem (< 3)).
Either installing with `--full-index` or running `bundle update example-gem` should fix the problem.
However, bundle install --full-index did not any better for me, and bundle update is not always a viable solution.
Easiest solution
Open Gemfile.lock and add the dependencies manually by looking for example-gem and adding its dependencies underneath. You may even copy them from the error message.
...
GEM
specs:
...
example-gem (1.2.3)
+ other-gem (< 3)
DEPENDENCIES
...
bundle install should succeed now. If it doesn't, you have probably screwed its syntax. Check your Gemfile.lock again.
Posted by Dominik Schöler to makandra dev (2018-04-04 12:34)