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Add Ruby 4.x support #234

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@splittingred splittingred commented Jan 7, 2026 •
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What? Why?

Loosens the pin for Ruby 4.x support, and adds a CircleCI test suite for it.

(Note: this is on hold until CircleCI adds a Ruby 4.0 image, a PR is open for this here.)

How was it tested?

Locally via ./script/e2e and through CI tests.

➜  ./script/e2e
Beginning full e2e test...
Installing gems...
Bundle complete! 16 Gemfile dependencies, 61 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.
Starting gruf server...
D, [2026-01-07T16:22:56.967303 #50464] DEBUG -- : [gruf] Binding Grpc::Health::V1::Health::Service to Gruf::Controllers::HealthController
I, [2026-01-07T16:22:56.967384 #50464]  INFO -- : Executing before server start hook...
I, [2026-01-07T16:22:56.967451 #50464]  INFO -- : [gruf] Starting gruf server at localhost:8001...
Running unary test...
D, [2026-01-07T16:23:01.626468 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:01.626495 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::OutputMetadataTimer
D, [2026-01-07T16:23:01.626727 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::Statsd
D, [2026-01-07T16:23:01.626763 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.get_thing
D, [2026-01-07T16:23:01.626772 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Authentication::Basic
D, [2026-01-07T16:23:01.626802 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::RequestLogging::Interceptor
D, [2026-01-07T16:23:01.626817 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:01.629375 #50464] DEBUG -- : [GRPC::Ok] (get_thing) [1.83ms] [GRPC::Ok] (rpc.thing_service.get_thing) Parameters: {id: 77834}
D, [2026-01-07T16:23:01.629410 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.get_thing.success
D, [2026-01-07T16:23:01.629423 #50464] DEBUG -- : statsd.timing: demo.rpc.thing_service.get_thing -> 2.626
I, [2026-01-07T16:23:01.629958 #50480]  INFO -- : Got response from server in client interceptor rpc.thing_service.get_thing of type request_response: 8.48ms
I, [2026-01-07T16:23:01.630432 #50480]  INFO -- : <Rpc::GetThingResponse: thing: <Rpc::Thing: id: 77834, name: "Genaro">>
Running server streamer test...
I, [2026-01-07T16:23:01.923820 #50481]  INFO -- : Got response from server in client interceptor rpc.thing_service.get_things of type server_streamer: 1.79ms
D, [2026-01-07T16:23:01.924367 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:01.924388 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::OutputMetadataTimer
D, [2026-01-07T16:23:01.924397 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::Statsd
D, [2026-01-07T16:23:01.924418 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.get_things
D, [2026-01-07T16:23:01.924422 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Authentication::Basic
D, [2026-01-07T16:23:01.924442 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::RequestLogging::Interceptor
D, [2026-01-07T16:23:01.924451 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:01.924506 #50464] DEBUG -- : [GRPC::Ok] (get_things) [0.01ms] [GRPC::Ok] (rpc.thing_service.get_things) Parameters: {}
D, [2026-01-07T16:23:01.924517 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.get_things.success
D, [2026-01-07T16:23:01.924527 #50464] DEBUG -- : statsd.timing: demo.rpc.thing_service.get_things -> 0.09000000000000001
I, [2026-01-07T16:23:01.925481 #50481]  INFO -- : <Rpc::Thing: id: 630, name: "sint">
I, [2026-01-07T16:23:02.931813 #50481]  INFO -- : <Rpc::Thing: id: 284, name: "quibusdam">
I, [2026-01-07T16:23:03.936024 #50481]  INFO -- : <Rpc::Thing: id: 1000, name: "maxime">
I, [2026-01-07T16:23:04.938886 #50481]  INFO -- : <Rpc::Thing: id: 46, name: "quaerat">
I, [2026-01-07T16:23:05.941877 #50481]  INFO -- : <Rpc::Thing: id: 755, name: "voluptate">
Running client streamer test...
I, [2026-01-07T16:23:06.247122 #50489]  INFO -- : Sending: <Rpc::Thing: id: 761, name: "necessitatibus">
D, [2026-01-07T16:23:06.247389 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:06.247414 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::OutputMetadataTimer
D, [2026-01-07T16:23:06.247426 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::Statsd
D, [2026-01-07T16:23:06.247456 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.create_things
D, [2026-01-07T16:23:06.247462 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Authentication::Basic
D, [2026-01-07T16:23:06.247481 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::RequestLogging::Interceptor
D, [2026-01-07T16:23:06.247492 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
I, [2026-01-07T16:23:07.252437 #50489]  INFO -- : Sending: <Rpc::Thing: id: 975, name: "minima">
I, [2026-01-07T16:23:07.252771 #50489]  INFO -- : Sending: <Rpc::Thing: id: 547, name: "recusandae">
I, [2026-01-07T16:23:08.255410 #50489]  INFO -- : Sending: <Rpc::Thing: id: 924, name: "odit">
I, [2026-01-07T16:23:08.256680 #50489]  INFO -- : Sending: <Rpc::Thing: id: 187, name: "iusto">
I, [2026-01-07T16:23:08.256788 #50489]  INFO -- : Sending: <Rpc::Thing: id: 80, name: "reprehenderit">
I, [2026-01-07T16:23:08.256865 #50489]  INFO -- : Sending: <Rpc::Thing: id: 801, name: "eius">
I, [2026-01-07T16:23:08.256964 #50489]  INFO -- : Sending: <Rpc::Thing: id: 641, name: "vero">
I, [2026-01-07T16:23:09.259980 #50489]  INFO -- : Sending: <Rpc::Thing: id: 879, name: "ut">
I, [2026-01-07T16:23:10.264968 #50489]  INFO -- : Sending: <Rpc::Thing: id: 841, name: "dignissimos">
D, [2026-01-07T16:23:10.265972 #50464] DEBUG -- : [GRPC::Ok] (create_things) [4018.07ms] Parameters: {}
D, [2026-01-07T16:23:10.266092 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.create_things.success
D, [2026-01-07T16:23:10.266133 #50464] DEBUG -- : statsd.timing: demo.rpc.thing_service.create_things -> 4018.598
I, [2026-01-07T16:23:10.267034 #50489]  INFO -- : Got response from server in client interceptor rpc.thing_service.create_things of type client_streamer: 4022.02ms
I, [2026-01-07T16:23:10.268215 #50489]  INFO -- : <Rpc::CreateThingsResponse: things: [<Rpc::Thing: id: 761, name: "illo">, <Rpc::Thing: id: 975, name: "cumque">, <Rpc::Thing: id: 547, name: "provident">, <Rpc::Thing: id: 924, name: "possimus">, <Rpc::Thing: id: 187, name: "quibusdam">, <Rpc::Thing: id: 80, name: "culpa">, <Rpc::Thing: id: 801, name: "nulla">, <Rpc::Thing: id: 641, name: "sit">, <Rpc::Thing: id: 879, name: "corrupti">, <Rpc::Thing: id: 841, name: "provident">]>
Running bidi streamer test...
I, [2026-01-07T16:23:10.584087 #50495]  INFO -- : Got response from server in client interceptor rpc.thing_service.create_things_in_stream of type bidi_streamer: 1.54ms
D, [2026-01-07T16:23:10.584667 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:10.584688 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::OutputMetadataTimer
D, [2026-01-07T16:23:10.584696 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::Statsd
D, [2026-01-07T16:23:10.584717 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.create_things_in_stream
D, [2026-01-07T16:23:10.584724 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Authentication::Basic
D, [2026-01-07T16:23:10.584742 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::RequestLogging::Interceptor
D, [2026-01-07T16:23:10.584752 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:10.584790 #50464] DEBUG -- : [GRPC::Ok] (create_things_in_stream) [0.01ms] Parameters: {}
D, [2026-01-07T16:23:10.584801 #50464] DEBUG -- : statsd.increment: demo.rpc.thing_service.create_things_in_stream.success
D, [2026-01-07T16:23:10.584810 #50464] DEBUG -- : statsd.timing: demo.rpc.thing_service.create_things_in_stream -> 0.073
I, [2026-01-07T16:23:11.589941 #50495]  INFO -- : Sending: <Rpc::Thing: id: 130, name: "maxime">
I, [2026-01-07T16:23:11.590571 #50495]  INFO -- : Received: <Rpc::Thing: id: 130, name: "maxime">
I, [2026-01-07T16:23:12.590765 #50495]  INFO -- : Sending: <Rpc::Thing: id: 242, name: "laboriosam">
I, [2026-01-07T16:23:12.594745 #50495]  INFO -- : Received: <Rpc::Thing: id: 242, name: "laboriosam">
I, [2026-01-07T16:23:13.596022 #50495]  INFO -- : Sending: <Rpc::Thing: id: 312, name: "facere">
I, [2026-01-07T16:23:13.596791 #50495]  INFO -- : Sending: <Rpc::Thing: id: 953, name: "unde">
I, [2026-01-07T16:23:13.597316 #50495]  INFO -- : Received: <Rpc::Thing: id: 312, name: "facere">
I, [2026-01-07T16:23:14.600419 #50495]  INFO -- : Sending: <Rpc::Thing: id: 538, name: "perspiciatis">
I, [2026-01-07T16:23:14.600624 #50495]  INFO -- : Sending: <Rpc::Thing: id: 585, name: "maxime">
I, [2026-01-07T16:23:14.600909 #50495]  INFO -- : Received: <Rpc::Thing: id: 953, name: "unde">
I, [2026-01-07T16:23:15.603446 #50495]  INFO -- : Sending: <Rpc::Thing: id: 831, name: "illum">
I, [2026-01-07T16:23:15.603870 #50495]  INFO -- : Sending: <Rpc::Thing: id: 353, name: "et">
I, [2026-01-07T16:23:15.604309 #50495]  INFO -- : Received: <Rpc::Thing: id: 538, name: "perspiciatis">
I, [2026-01-07T16:23:15.604367 #50495]  INFO -- : Received: <Rpc::Thing: id: 585, name: "maxime">
I, [2026-01-07T16:23:15.604827 #50495]  INFO -- : Received: <Rpc::Thing: id: 831, name: "illum">
I, [2026-01-07T16:23:15.604877 #50495]  INFO -- : Received: <Rpc::Thing: id: 353, name: "et">
I, [2026-01-07T16:23:16.608772 #50495]  INFO -- : Sending: <Rpc::Thing: id: 70, name: "tempore">
I, [2026-01-07T16:23:16.609687 #50495]  INFO -- : Received: <Rpc::Thing: id: 70, name: "tempore">
I, [2026-01-07T16:23:17.611213 #50495]  INFO -- : Sending: <Rpc::Thing: id: 987, name: "quod">
I, [2026-01-07T16:23:17.611573 #50495]  INFO -- : Received: <Rpc::Thing: id: 987, name: "quod">
Running health check test...
D, [2026-01-07T16:23:17.941912 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:17.941939 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::OutputMetadataTimer
D, [2026-01-07T16:23:17.941948 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::Statsd
D, [2026-01-07T16:23:17.941972 #50464] DEBUG -- : statsd.increment: demo.grpc.health.v1.health.check
D, [2026-01-07T16:23:17.941977 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Authentication::Basic
D, [2026-01-07T16:23:17.941998 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::Instrumentation::RequestLogging::Interceptor
D, [2026-01-07T16:23:17.942008 #50464] DEBUG -- : Intercepting request with interceptor: Gruf::Interceptors::ActiveRecord::ConnectionReset
D, [2026-01-07T16:23:17.942064 #50464] DEBUG -- : [GRPC::Ok] (check) [0.02ms] [GRPC::Ok] (grpc.health.v1.health.check) Parameters: {}
D, [2026-01-07T16:23:17.942075 #50464] DEBUG -- : statsd.increment: demo.grpc.health.v1.health.check.success
D, [2026-01-07T16:23:17.942086 #50464] DEBUG -- : statsd.timing: demo.grpc.health.v1.health.check -> 0.094
I, [2026-01-07T16:23:17.942305 #50503]  INFO -- : Got response from server in client interceptor grpc.health.v1.health.check of type request_response: 2.62ms
I, [2026-01-07T16:23:17.942565 #50503]  INFO -- : <Grpc::Health::V1::HealthCheckResponse: status: :SERVING>
Tests successful! Shutting down server...
Server shutdown, E2E test finished successfully.

@splittingred splittingred self-assigned this Jan 7, 2026
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CloCkWeRX commented Jan 12, 2026

CircleCI-Public/cimg-ruby#215 unblocks this now

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splittingred commented Jan 12, 2026 •
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It looks like the gRPC team has not yet published the precompiled binaries for grpc/grpc. This meams 4.0 will take an inordinate amount of time in CI builds as it will have to compile gRPC from scratch. I am inclined to not merge this and offer support (similar to what we did with 3.3 and 3.4) until that is done.

I'm open to community thoughts otherwise, here though.

There are multiple WIP PRs in grpc/grpc trying to address this: https://github.com/grpc/grpc/issues?q=ruby%204.0

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splittingred commented Jan 12, 2026

Looks like a decision here is irrelevant, compiling grpc on Ruby 4.0 takes 10m+, which puts it past the CI timeout. Will be holding on merging this until it is resolved upstream by grpc/grpc.

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