flux-image-test.yaml

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

on:
  pull_request:
    branches:
      - main
    paths:
      - kubernetes/**

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

jobs:
  changed-clusters:
    name: Changed Clusters
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.changed-clusters.outputs.all_changed_and_modified_files }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          repository: ${{ github.event.pull_request.head.repo.full_name }}

      - name: Get Changed Clusters
        id: changed-clusters
        uses: tj-actions/changed-files@v45
        with:
          files: kubernetes/**
          dir_names: true
          dir_names_max_depth: 2
          json: true
          escape_json: false

      - name: List All Changed Clusters
        run: echo "${{ steps.changed-clusters.outputs.all_changed_and_modified_files }}"

  extract-images:
    name: Extract Images
    runs-on: ubuntu-latest
    needs:
      - changed-clusters
    permissions:
      pull-requests: write
    strategy:
      matrix:
        paths: ${{ fromJSON(needs.changed-clusters.outputs.matrix) }}
      max-parallel: 4
      fail-fast: false
    outputs:
      matrix: ${{ steps.extract-images.outputs.images }}
    steps:
      - name: Setup Homebrew
        uses: Homebrew/actions/setup-homebrew@master

      - name: Setup Workflow Tools
        shell: bash
        run: brew install jo yq

      - 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: Gather Images in Default Branch
        uses: docker://ghcr.io/allenporter/flux-local:v6.1.0
        with:
          args: >-
            get cluster
            --path /github/workspace/default/${{ matrix.paths }}/flux
            --enable-images
            --output yaml
            --output-file default.yaml

      - name: Gather Images in Pull Request Branch
        uses: docker://ghcr.io/allenporter/flux-local:v6.1.0
        with:
          args: >-
            get cluster
            --path /github/workspace/pull/${{ matrix.paths }}/flux
            --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: |
          IFS=$'\n' read -r -d '' -a diff < <( (grep -vf default.txt pull.txt || true) && printf '\0' )
          images=$(jo -a "${diff[@]}")
          echo "images=${images}" >> "$GITHUB_OUTPUT"
          echo "${images}"
          echo "### Images" >> "$GITHUB_STEP_SUMMARY"
          echo "${images}" | jq -r 'to_entries[] | "* \(.value)"' >> "$GITHUB_STEP_SUMMARY"

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

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