Migrate to GitHub Actions (#41)

Migrate CI to use GitHub Actions.

### Motivation:

To migrate to GitHub actions and centralised infrastructure.

### Modifications:

Changes of note:
* Adopt swiftlang soundness checks, swift version matrix
* Remove scripts and docker files which are no longer needed

### Result:

Feature parity with old CI.

### Test Plan

Execute CI

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

.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_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+      linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+      linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --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 +1,27 @@
+name: PR
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  soundness:
+    name: Soundness
+    uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
+    with:
+      license_header_check_project_name: "SwiftOpenAPIGenerator"
+
+  unit-tests:
+    name: Unit tests
+    uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
+    with:
+      linux_5_9_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error -Xswiftc -strict-concurrency=complete"
+      # TODO: `enable -Xswiftc -strict-concurrency=complete`
+      linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+      linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable -Xswiftc -strict-concurrency=complete"
+      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

.github/workflows/pull_request_label.yml

@@ -0,0 +1,18 @@
+name: PR label
+
+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

.licenseignore

@@ -0,0 +1,36 @@
+.gitignore
+**/.gitignore
+.licenseignore
+.gitattributes
+.git-blame-ignore-revs
+.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
+.unacceptablelanguageignore

.spi.yml

@@ -1,5 +1,5 @@
 version: 1
 builder:
   configs:
-  - documentation_targets:
-    - OpenAPIAsyncHTTPClient
+    - documentation_targets:
+        - OpenAPIAsyncHTTPClient

CONTRIBUTING.md

@@ -56,28 +56,10 @@ A good patch is:
 3. Documented, adding API documentation as needed to cover new functions and properties.
 4. Accompanied by a great commit message, using our commit message template.
 
-### Run `./scripts/soundness.sh`
+### Run CI checks locally
 
-The scripts directory contains a [soundness.sh script](https://github.com/swift-server/swift-openapi-async-http-client/blob/main/scripts/soundness.sh) 
-that enforces additional checks, like license headers and formatting style.
-
-Please make sure to `./scripts/soundness.sh` before pushing a change upstream, otherwise it is likely the PR validation will fail
-on minor changes such as a missing `self.` or similar formatting issues.
-
-For frequent contributors, we recommend adding the script as a [git pre-push hook](https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks), which you can do via executing the following command in the project root directory: 
-
-```bash
-cat << EOF > .git/hooks/pre-push
-
-if [[ -f "scripts/soundness.sh" ]]; then
-  scripts/soundness.sh
-fi
-EOF
-```
-
-Which makes the script execute, and only allow the `git push` to complete if the check has passed.
-
-In the case of formatting issues, you can then `git add` the formatting changes, and attempt the push again. 
+You can run the GitHub Actions workflows locally using
+[act](https://github.com/nektos/act). For detailed steps on how to do this please see [https://github.com/swiftlang/github-workflows?tab=readme-ov-file#running-workflows-locally](https://github.com/swiftlang/github-workflows?tab=readme-ov-file#running-workflows-locally).
 
 ## How to contribute your work
 

Package.swift

@@ -24,21 +24,13 @@ let swiftSettings: [SwiftSetting] = [
 
 let package = Package(
     name: "swift-openapi-async-http-client",
-    platforms: [
-        .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
-    ],
-    products: [
-        .library(
-            name: "OpenAPIAsyncHTTPClient",
-            targets: ["OpenAPIAsyncHTTPClient"]
-        ),
-    ],
+    platforms: [.macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)],
+    products: [.library(name: "OpenAPIAsyncHTTPClient", targets: ["OpenAPIAsyncHTTPClient"])],
     dependencies: [
         .package(url: "https://github.com/apple/swift-nio", from: "2.58.0"),
         .package(url: "https://github.com/swift-server/async-http-client.git", from: "1.23.0"),
         .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-http-types", from: "1.0.0"),
-        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [
         .target(
@@ -53,9 +45,7 @@ let package = Package(
         ),
         .testTarget(
             name: "OpenAPIAsyncHTTPClientTests",
-            dependencies: [
-                "OpenAPIAsyncHTTPClient",
-            ],
+            dependencies: ["OpenAPIAsyncHTTPClient"],
             swiftSettings: swiftSettings
         ),
     ]