Is a gem ready for Rails 4 or 5?

Rails 4: 615 ready, 38 not ready, and 433 unknown
Rails 5: 163 ready, 11 not ready, and 912 unknown
Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
scenic ready

-

ready

5.2 from master, 5.1 from v1.4.0, 5.0 from v1.1.0 (at least, could be earlier)

10 months ago
sdoc ready

does not depend on Rails

ready

does not depend on Rails

10 months ago
shoulda ready

per README for 4.2

ready

per README, at least for 5.0

10 months ago
sidekiq ready

source

ready

does not depend on Rails

10 months ago
sinatra ready

Does not depend on Rails.

ready

does not depend on Rails

10 months ago
spring ready

It's Rails core.

ready

from gem version 2.0.0 - though there is this bug: https://github.com/rails/spring/issues/485

10 months ago
sprockets ready

Official rails gem

unknown

Doesn't explicitly say anywhere that it supports Rails 5 but... other guides (eg this one: https://medium.com/@coorasse/goodbye-sprockets-welcome-webpacker-3-0-ff877fb8fa79 talk about upgrading sprockets to webpacker on Rails 5.1 (and talk about sprockets being present first), so I'm assuming it is Rails 5 ready... though no longer recommended.

10 months ago
turbolinks ready

-

ready

use version gem 5.2

10 months ago
uglifier ready

does not depend on Rails

ready

does not depend on Rails

10 months ago
webmock ready

Does not depend on Rails.

ready

does not depend on Rails

10 months ago
rollbar ready

since version 0.10.3

ready

ready since version v2.10.0

10 months ago
stripe ready

Does not depend on rails

ready

does not depend on Rails

10 months ago
bcrypt-ruby ready

Does not depend on Rails

ready

Does not depend on Rails

10 months ago
marco-polo ready

running in our 4.2 app for some time

ready

Not specified... Has rails dependencies, but just uses ENV vars for app name. Probably ok.

10 months ago
capybara-selenium ready

Running on our 4.2 app for some time

ready

Not dependent on Rails

10 months ago
rspec-collection_matchers ready

Running on our 4.2 app for some time

unknown

unspecified in README/changelog Plausibly has dependencies on Rails (AR) architecture.

10 months ago
rspec-activemodel-mocks ready

running on our 4.2 app for some time

unknown

Not specified in README - unclear if it's compatible or not

10 months ago
rubocop-rspec ready

Running on our 4.2 app for some time

ready

Not dependent on rails

10 months ago
listen ready

Running on our 4.2 app for some time

ready

Not dependent on rails

10 months ago
spring-watcher-listen ready

running in our 4.2 app

ready

Doesn't seem dependent on rails

10 months ago