k8scompat.yaml

name: Kubernetes Version Compatibility Tests
on:
  push:
  pull_request:
    branches:
      - main
  workflow_dispatch:
  schedule:
    - cron: 0 0 * * *

env:
  setupEnvtestCmd: "go run sigs.k8s.io/controller-runtime/tools/setup-envtest@latest"

jobs:
  buildMatrix:
    name: Generate Matrix
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.build.outputs.matrix }}
    steps:
      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.22'

      - name: Generate test matrix using setup-envtest
        id: build
        run: |
          echo "matrix=$($setupEnvtestCmd -p env list | awk '/)/ {print $2}' | awk -F'.' '{print $2}' | jq -c --slurp 'map(tostring) | unique')" >> $GITHUB_OUTPUT 

  test:
    name: Kubernetes 1.${{ matrix.downstreamApiserverMinorVersion }}
    needs: buildMatrix
    runs-on: ubuntu-latest
    env:
      upstreamApiserverVersion: 1.28.x
    strategy:
      fail-fast: false
      matrix:
        downstreamApiserverMinorVersion: ${{ fromJson(needs.buildMatrix.outputs.matrix) }}
    steps:
      - uses: actions/checkout@v4

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.22'

      - name: Download kubebuilder assets
        run: |
          echo "UPSTREAM_KUBEBUILDER_ASSETS=$($setupEnvtestCmd use -p path ${{ env.upstreamApiserverVersion }})" >> $GITHUB_ENV
          echo "DOWNSTREAM_KUBEBUILDER_ASSETS=$($setupEnvtestCmd use -p path 1.${{ matrix.downstreamApiserverMinorVersion }}.x)" >> $GITHUB_ENV

      - name: Run tests
        run: go test -v ./internal/controllers/reconciliation
        env:
          DOWNSTREAM_VERSION_MINOR: "${{ matrix.downstreamApiserverMinorVersion }}"