Migrate CI to use swiftlang / SwiftNIO common GitHub Actions.

Motivation:

* Reduce duplication
* Centralise boilerplate changes when new Swift versions are picked up.
* Benefit from centralised work to add new linting / test
  infrastructure.

Modifications:

Changes of note:
* Use soundness checks from swiftlang/github-workflows.
* Retain bespoke license-checking code for .swift files as the gRPC
  header style is very different to most templates.

Result:

More test, linting, formatting coverage. More common CI with other Swift
on Server projects.

.github/release.yml

@@ -0,0 +1,14 @@
+changelog:
+  categories:
+    - title: SemVer Major
+      labels:
+        - ⚠️ semver/major
+    - title: SemVer Minor
+      labels:
+        - semver/minor
+    - title: SemVer Patch
+      labels:
+        - semver/patch
+    - title: Other Changes
+      labels:
+        - semver/none

.github/workflows/main.yml

@@ -0,0 +1,18 @@
+name: Main
+
+on:
+  push:
+    branches: [main]
+  schedule:
+    - cron: "0 8,20 * * *"
+
+jobs:
+  unit-tests:
+    name: Unit tests
+    uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
+    with:
+      linux_5_9_enabled: false
+      linux_5_10_enabled: false
+      linux_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
+      linux_nightly_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
+      linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"

.github/workflows/pull_request.yml

@@ -0,0 +1,34 @@
+name: PR
+
+on:
+  pull_request:
+    branches: [main]
+    types: [opened, reopened, synchronize]
+
+jobs:
+  soundness:
+    name: Soundness
+    uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
+    with:
+      license_header_check_project_name: "gRPC"
+
+  grpc-soundness:
+    name: Soundness
+    uses: ./.github/workflows/soundness.yml
+
+  unit-tests:
+    name: Unit tests
+    uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
+    with:
+      linux_5_9_enabled: false
+      linux_5_10_enabled: false
+      linux_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
+      linux_nightly_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
+      linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
+
+  cxx-interop:
+    name: Cxx interop
+    uses: apple/swift-nio/.github/workflows/cxx_interop.yml@main
+    with:
+      linux_5_9_enabled: false
+      linux_5_10_enabled: false

.github/workflows/pull_request_label.yml

@@ -0,0 +1,18 @@
+name: PR
+
+on:
+  pull_request:
+    types: [labeled, unlabeled, opened, reopened, synchronize]
+
+jobs:
+  semver-label-check:
+    name: Semantic version label check
+    runs-on: ubuntu-latest
+    timeout-minutes: 1
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Check for Semantic Version label
+        uses: apple/swift-nio/.github/actions/pull_request_semver_label_checker@main

.github/workflows/soundness.yml

@@ -0,0 +1,37 @@
+name: Soundness
+
+on:
+  workflow_call:
+
+jobs:
+  swift-license-check:
+    name: Swift license headers check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Mark the workspace as safe
+        run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
+      - name: Run license check
+        run: |
+          ./dev/license-check.sh
+
+  check-generated-code:
+    name: Check generated code
+    runs-on: ubuntu-latest
+    container:
+      image: swift:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Mark the workspace as safe
+        run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
+      - name: Install protoc
+        run: apt update && apt install -y protobuf-compiler
+      - name: Run soundness checks
+        run: |
+          ./dev/check-generated-code.sh

.license_header_template

@@ -0,0 +1,13 @@
+@@ Copyright YEARS, gRPC Authors All rights reserved.
+@@
+@@ Licensed under the Apache License, Version 2.0 (the "License");
+@@ you may not use this file except in compliance with the License.
+@@ You may obtain a copy of the License at
+@@
+@@     http://www.apache.org/licenses/LICENSE-2.0
+@@
+@@ Unless required by applicable law or agreed to in writing, software
+@@ distributed under the License is distributed on an "AS IS" BASIS,
+@@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@@ See the License for the specific language governing permissions and
+@@ limitations under the License.

.licenseignore

@@ -0,0 +1,41 @@
+.gitignore
+**/.gitignore
+.licenseignore
+.gitattributes
+.git-blame-ignore-revs
+.gitmodules
+.mailfilter
+.mailmap
+.spi.yml
+.swift-format
+.swiftformatignore
+.editorconfig
+.github/*
+*.md
+*.txt
+*.yml
+*.yaml
+*.json
+Package.swift
+**/Package.swift
+Package@-*.swift
+**/Package@-*.swift
+Package.resolved
+**/Package.resolved
+Makefile
+*.modulemap
+**/*.modulemap
+**/*.docc/*
+*.xcprivacy
+**/*.xcprivacy
+*.symlink
+**/*.symlink
+Dockerfile
+**/Dockerfile
+Snippets/*
+dev/git.commit.template
+dev/version-bump.commit.template
+.unacceptablelanguageignore
+LICENSE
+**/*.swift
+dev/protos/**/*.proto

.swiftformatignore

@@ -0,0 +1,2 @@
+*.grpc.swift
+*.pb.swift

.unacceptablelanguageignore

@@ -0,0 +1,4 @@
+**/*.pb.swift
+**/*.gprc.swift
+./Sources/GRPCHealthService/Generated/*
+./Sources/GRPCInteropTests/Generated/*

Package.swift

@@ -54,7 +54,7 @@ let dependencies: [Package.Dependency] = [
 let defaultSwiftSettings: [SwiftSetting] = [
   .swiftLanguageMode(.v6),
   .enableUpcomingFeature("ExistentialAny"),
-  .enableUpcomingFeature("InternalImportsByDefault")
+  .enableUpcomingFeature("InternalImportsByDefault"),
 ]
 
 let targets: [Target] = [
@@ -90,7 +90,7 @@ let targets: [Target] = [
     dependencies: [
       .target(name: "GRPCInterceptors"),
       .product(name: "GRPCCore", package: "grpc-swift"),
-      .product(name: "Tracing", package: "swift-distributed-tracing")
+      .product(name: "Tracing", package: "swift-distributed-tracing"),
     ]
   ),
 
@@ -111,7 +111,7 @@ let targets: [Target] = [
       .product(name: "GRPCCore", package: "grpc-swift"),
       .product(name: "GRPCInProcessTransport", package: "grpc-swift"),
     ]
-  )
+  ),
 ]
 
 let package = Package(

Sources/GRPCHealthService/Health.swift

@@ -17,7 +17,7 @@
 public import GRPCCore
 
 /// ``Health`` is gRPC’s mechanism for checking whether a server is able to handle RPCs. Its semantics are documented in
-/// https://github.com/grpc/grpc/blob/master/doc/health-checking.md.
+/// https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/doc/health-checking.md.
 ///
 /// `Health` initializes a new ``Health/Service-swift.struct`` and ``Health/Provider-swift.struct``.
 /// - `Health.Service` implements the Health service from the `grpc.health.v1` package and can be registered with a server

Sources/GRPCInteropTests/InteroperabilityTestCase.swift

@@ -27,7 +27,7 @@ public protocol InteroperabilityTest {
 }
 
 /// Test cases as listed by the [gRPC interoperability test description specification]
-/// (https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md).
+/// (https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/doc/interop-test-descriptions.md).
 ///
 /// This is not a complete list, the following tests have not been implemented:
 /// - cacheable_unary (caching not supported)

Sources/GRPCInteropTests/TestService.swift

@@ -218,7 +218,7 @@ public struct TestService: Grpc_Testing_TestService.ServiceProtocol {
 
   /// This is not implemented as it is not described in the specification.
   ///
-  /// See: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
+  /// See: https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/doc/interop-test-descriptions.md
   public func halfDuplexCall(
     request: StreamingServerRequest<Grpc_Testing_StreamingOutputCallRequest>,
     context: ServerContext

Sources/GRPCReflectionService/Documentation.docc/ReflectionServiceTutorial.md

@@ -216,7 +216,7 @@ Note that when specifying a service, a method or a symbol, we have to use the fu
 
 [grpcurl-setup]: https://github.com/fullstorydev/grpcurl#grpcurl
 [grpcurl]: https://github.com/fullstorydev/grpcurl
-[grpc-cli]: https://github.com/grpc/grpc/blob/master/doc/command_line_tool.md
+[grpc-cli]: https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/doc/command_line_tool.md
 [v1]: ../v1/reflection-v1.proto
 [v1alpha]: ../v1Alpha/reflection-v1alpha.proto
 [reflection-server]: ../../Examples/v1/ReflectionService/ReflectionServer.swift

Sources/GRPCReflectionService/Server/ReflectionService.swift

@@ -326,9 +326,9 @@ extension ReflectionService {
     var wrapped: Wrapped
     private init(_ wrapped: Wrapped) { self.wrapped = wrapped }
 
-    /// The v1 version of reflection service: https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1/reflection.proto.
+    /// The v1 version of reflection service: https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/src/proto/grpc/reflection/v1/reflection.proto.
     public static var v1: Self { Self(.v1) }
-    /// The v1alpha version of reflection service: https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+    /// The v1alpha version of reflection service: https://github.com/grpc/grpc/blob/5011420f160b91129a7baebe21df9444a07896a6/src/proto/grpc/reflection/v1alpha/reflection.proto.
     public static var v1Alpha: Self { Self(.v1Alpha) }
   }
 

dev/check-generated-code.sh

@@ -1,18 +1,17 @@
 #!/bin/bash
-
-# Copyright 2024, gRPC Authors All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+## Copyright 2024, gRPC Authors All rights reserved.
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+##     http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
 
 set -euo pipefail
 

dev/format.sh

@@ -1,18 +1,17 @@
 #!/bin/bash
-
-# Copyright 2020, gRPC Authors All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+## Copyright 2020, gRPC Authors All rights reserved.
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+##     http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
 
 set -eu
 
@@ -68,8 +67,7 @@ if "$lint"; then
     To fix, run the following command:
 
     % $THIS_SCRIPT -f
-    "
-    exit "${SWIFT_FORMAT_RC}"
+    " "${SWIFT_FORMAT_RC}"
   fi
 
   log "Ran swift format lint with no errors."