Gem Spec Redis versions mean that redis 4.x is not supported

[acunningham-fz]

Hi there,

We are still using the 4.x version of the Redis Gem. We wanted to use the CB2 gem for the circuit breaker pattern but if will not install with bundler - the failure is as follows:

because cb2 >= 0.0.4 depends on redis >= 5, < 6.A
  and cb2 < 0.0.4 depends on redis ~> 3.1,
  redis ~> 3.1 OR >= 5, < 6.A is required.
So, because Gemfile depends on redis ~> 4,
  version solving has failed.

The issus stems from the cb2.gemspec line that defines the redis dependency:

s.add_dependency "redis", "~> 5", ">= 4"

To quote chatgpt (I know, I know):

the acceptable versions of the redis gem must satisfy both constraints:
>= 4
>= 5.0 and < 6.0 (from ~> 5)
Which effectively means:
The allowed versions are >= 5.0 and < 6.0.
Because even though >= 4 is specified, the ~> 5 restricts it to versions starting at 5.0.

Need to modify this line as:

s.add_dependency "redis", ">= 4"

to allow either redis 4 or redis 5 gem to be used.

Thanks

[acunningham-fz]

Hi @prognostikos - small change but wondering if you are open to the fix - also looking to update our Redis gem to 5 to make this work as well. It would require a new version of the gem to be released to update the gemspec that gets pulled. Thank you.

[prognostikos]

@acunningham-fz I've released version 1.0.0 with your changes, thanks!