Require either redis or dalli but not both

[jeremywadsack]

Right now, your gemspec has the following:

  spec.add_dependency "dalli"
  spec.add_dependency "redis"

We only use Redis as a backend, not Memcached. Adding the dependency on dalli bloats our code.

Would it be possible to make this a dynamic dependency? It seems that the Gemfile using Suo is likely to already have redis or dalli included, so can you just skip the dependencies and load them on-demand? (You'd still need them in development_dependencies for tests.) I think you'd need a note in the README about that requirement.

[nickelser]

this absolutely makes sense, and normally i would just do this, but i'm quite wary of breaking existing applications. i could detect one or the other, and raise if neither is found -- what do you think?

[jeremywadsack]

Sure, using some begin ... resque ... end would make sense.