Use container instead

Author: x-sheep

.github/workflows/swift.yml

@@ -7,21 +7,34 @@ on:
     branches: [ "*" ]
 
 jobs:
-  tests:
-    name: Tests
-    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
-    with:
-      enable_macos_checks: true
-      macos_xcode_versions: '["16.3"]'
-      linux_swift_versions: '["6.1", "nightly-6.2"]'
-      windows_swift_versions: '["6.1", "nightly-6.2"]'
+  mac:
+    name: Swift on macOS
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: swift build -v
+      - name: Run tests
+        run: swift test -v
+  linux:
+    name: Swift ${{ matrix.swift }} on Linux
+    runs-on: ubuntu-latest
+    container: swift:{{ matrix.swift }}
+    strategy:
+      fail-fast: false
+      matrix:
+        swift: ["6.1"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: swift build -v
+      - name: Run tests
+        run: swift test -v
   format:
     name: Format
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
+    container: swift:6.1
     steps:
-      - uses: swift-actions/setup-swift@682457186b71c25a884c45c06f859febbe259240
-        with:
-          swift-version: "6.1"
       - uses: actions/checkout@v4
       - name: Format
         run: swift format lint **/*.swift -r -s