flux-hr-image-test.yaml

---
# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
name: "Flux Helm Release Image Test"

on:
  pull_request:
    branches:
      - main

concurrency:
  group: ${{ github.workflow }}-${{ github.event.number || github.ref }}
  cancel-in-progress: true

jobs:
  changed-files:
    name: Get Changed Files
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.changed-files.outputs.all_changed_and_modified_files }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v42
        with:
          files: kubernetes/**
          dir_names: true
          dir_names_max_depth: 2
          json: true
          escape_json: false

      - name: List all changed files
        run: echo "${{ steps.changed-files.outputs.all_changed_and_modified_files }}"

  extract-images:
    name: Extract Images
    runs-on: ubuntu-latest
    needs:
      - changed-files
    if: ${{ needs.changed-files.outputs.matrix != '[]' }}
    permissions:
      pull-requests: read
    strategy:
      matrix:
        paths: ${{ fromJSON(needs.changed-files.outputs.matrix) }}
      max-parallel: 4
      fail-fast: false
    outputs:
      matrix: ${{ steps.extract-images.outputs.images }}
    steps:
      - name: Checkout default branch
        uses: actions/checkout@v4
        with:
          ref: "${{ github.event.repository.default_branch }}"
          path: default

      - name: Checkout Pull Request branch
        uses: actions/checkout@v4
        with:
          path: pull

      - name: Install Flux
        uses: fluxcd/flux2/action@main
        with:
          version: "latest"

      - name: Install yq
        uses: frenck/action-setup-yq@v1

      - name: Install jo
        uses: awalsh128/cache-apt-pkgs-action@v1.3.1
        with:
          packages: jo

      - name: Gather Images in Default Branch
        uses: docker://ghcr.io/allenporter/flux-local:pr-472
        with:
          args: >-
            get cluster
            --path /github/workspace/default/${{ matrix.paths }}
            --enable-images
            --output yaml
            --output-file default.yaml

      - name: Gather Images in Pull Request Branch
        uses: docker://ghcr.io/allenporter/flux-local:pr-472
        with:
          args: >-
            get cluster
            --path /github/workspace/pull/${{ matrix.paths }}
            --enable-images
            --output yaml
            --output-file pull.yaml

      - name: Filter Default Branch Results
        shell: bash
        run: |
          yq -r '[.. | .images? | select(. != null)] | flatten | sort | unique | .[]' \
              default.yaml > default.txt

      - name: Filter Pull Request Branch Results
        shell: bash
        run: |
          yq -r '[.. | .images? | select(. != null)] | flatten | sort | unique | .[]' \
              pull.yaml > pull.txt

      - name: Compare Default and Pull Request Images
        id: extract-images
        shell: bash
        run: |
          diff="$(grep -vf default.txt pull.txt || true)"
          images=$(jo -a "${diff}")
          echo "images=${images}" >> "${GITHUB_OUTPUT}"
          echo "${images}"

  test-images:
    name: Test images from Helm Release
    runs-on: ubuntu-latest
    needs:
      - "extract-images"
    if: ${{ needs.extract-images.outputs.matrix != '[null]' }}
    strategy:
      matrix:
        images: ${{ fromJSON(needs.extract-images.outputs.matrix) }}
      max-parallel: 4
      fail-fast: false
    steps:
      - name: Test Images from Helm Release
        run: docker pull ${{ matrix.images }}

  test-images-success:
    needs:
      - test-images
    if: ${{ always() }}
    name: Test images from Helm Release successful
    runs-on: ubuntu-latest
    steps:
      - name: Check matrix status
        if: >-
          ${{
               contains(needs.*.result, 'failure')
            || contains(needs.*.result, 'cancelled')
          }}
        run: exit 1