fix: use matrix to try multiple bazel versions and OSes

.github/actions/setup/action.yml

@@ -1,9 +1,19 @@
 ---
 name: Set up environment
 
+inputs:
+  bazel-version:
+    description: Bazel version
+    required: true
+
 runs:
   using: composite
   steps:
+    - name: Generate .bazeliskrc
+      shell: bash
+      run: |
+        echo ${{ inputs.bazel-version }} > .bazeliskrc
+        echo ${{ inputs.bazel-version }} > examples/.bazeliskrc
     - name: Install bazelisk
       shell: bash
       run: |

.github/workflows/tests.yml

@@ -12,31 +12,53 @@ concurrency:
 
 jobs:
   unit-test:
-    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        bazel-version:
+          - 6.5.0
+          - 7.1.1
+        runner:
+          - ubuntu-20.04
+          - ubuntu-22.04
+          - macos-13
+    runs-on: ${{ matrix.runner }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref }}
       - name: Set up
         uses: ./.github/actions/setup
+        with:
+          bazel-version: ${{ matrix.bazel-version }}
       - name: Run unit tests
         run: ./scripts/execute_tests.bash
 
   example:
-    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        bazel-version:
+          - 6.5.0
+          - 7.1.1
+        runner:
+          - ubuntu-20.04
+          - ubuntu-22.04
+          - macos-13
+    runs-on: ${{ matrix.runner }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref }}
       - name: Set up
         uses: ./.github/actions/setup
+        with:
+          bazel-version: ${{ matrix.bazel-version }}
       - name: Validate example
         run: ./scripts/validate_example.bash
 
   style-check:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.gitignore

@@ -1,3 +1,4 @@
 # Bazel
 /bazel-*
 MODULE.bazel.lock
+.bazeliskrc