pre-pull-images.yaml

---
# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
name: "Pre-pull Images"

on:
  pull_request:
    branches: ["main"]
    paths:
      - kubernetes/**/apps/**
      - kubernetes/**/flux/**
      - kubernetes/shared/**

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

env:
  HOMEBREW_NO_ANALYTICS: "1"

jobs:
  changed-clusters:
    name: Changed Clusters
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.changed-clusters.outputs.all_changed_and_modified_files }}
    steps:
      - name: Generate Token
        uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ secrets.BOT_APP_ID }}
          private-key: ${{ secrets.BOT_APP_PRIVATE_KEY }}

      - name: Checkout
        uses: actions/checkout@v4
        with:
          token: ${{ steps.app-token.outputs.token }}
          fetch-depth: 0

      - name: Get Changed Clusters
        id: changed-clusters
        uses: tj-actions/changed-files@v45
        with:
          files: kubernetes/**
          files_ignore: kubernetes/shared/**
          dir_names: true
          dir_names_max_depth: 2
          matrix: true

      - 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"]
    strategy:
      matrix:
        branches: ["default", "pull"]
        paths: ${{ fromJSON(needs.changed-clusters.outputs.matrix) }}
      fail-fast: false
    outputs:
      default: ${{ steps.extract-images.outputs.default }}
      pull: ${{ steps.extract-images.outputs.pull }}
    steps:
      - name: Generate Token
        uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ secrets.BOT_APP_ID }}
          private-key: ${{ secrets.BOT_APP_PRIVATE_KEY }}

      - name: Checkout
        uses: actions/checkout@v4
        with:
          token: ${{ steps.app-token.outputs.token }}
          ref: "${{ matrix.branches == 'default' && github.event.repository.default_branch || '' }}"

      - name: Gather Images
        uses: docker://ghcr.io/allenporter/flux-local:v7.0.0
        with:
          args: >-
            get cluster
            --all-namespaces
            --path /github/workspace/${{ matrix.paths | toLower }}/flux
            --enable-images
            --output yaml
            --output-file images.yaml

      - name: Extract Images
        id: extract-images
        run: |
          images=$(yq --indent=0 --output-format=json \
              '[.. | .images? | select(. != null)] | flatten | sort | unique' images.yaml \
          )
          echo "${{ matrix.branches }}=${images}" >> $GITHUB_OUTPUT

  compare-images:
    name: Compare Images
    runs-on: ubuntu-latest
    needs: ["extract-images"]
    outputs:
      images: ${{ steps.compare-images.outputs.images }}
    steps:
      - name: Compare Images
        id: compare-images
        run: |
          images=$(jq --compact-output --null-input \
              --argjson f1 '${{ needs.extract-images.outputs.default }}' \
              --argjson f2 '${{ needs.extract-images.outputs.pull }}' \
              '$f2 - $f1' \
          )
          echo "images=${images}" >> $GITHUB_OUTPUT

  pre-pull-images:
    if: ${{ needs.compare-images.outputs.images != '[]' }}
    name: Pre-pull Images
    runs-on: [home-ops-runner]
    needs: ["compare-images", "changed-clusters"]
    strategy:
      matrix:
        images: ${{ fromJSON(needs.compare-images.outputs.images) }}
        paths: ${{ fromJSON(needs.changed-clusters.outputs.matrix) }}
      max-parallel: 4
      fail-fast: false
    steps:
      - name: Grab Cluster Name
        run: |
          cluster="${{ matrix.paths | toLower }}"
          cluster="${cluster/kubernetes\//}"
          echo "cluster=${cluster^^}" >> $GITHUB_ENV

      - name: Set TALOSCONFIG UUID based on cluster
        id: set_talosconfig_uuid
        run: |
          if [ "${{ env.cluster }}" == "MAIN" ]; then
            echo "TALOSCONFIG_UUID=3e024961-ec9a-46e4-b288-b25e0176d5ad" >> $GITHUB_ENV
          elif [ "${{ env.cluster }}" == "UTILITY" ]; then
            echo "TALOSCONFIG_UUID=9d84521d-69b6-4f2a-b533-b25e0176dee7" >> $GITHUB_ENV
          else
            echo "TALOSCONFIG_UUID=default-uuid" >> $GITHUB_ENV
          fi

      - name: Get Secrets
        uses: bitwarden/sm-action@v2
        with:
          access_token: ${{ secrets.BW_ACCESS_TOKEN }}
          secrets: |
            ${{ env.TALOSCONFIG_UUID }} > TALOSCONFIG_BASE64

      - name: Write talosconfig
        id: talosconfig
        uses: timheuer/base64-to-file@v1
        with:
          encodedString: "${{ env.TALOSCONFIG_BASE64 }}"
          fileName: talosconfig

      - name: Setup Homebrew
        uses: Homebrew/actions/setup-homebrew@master

      - name: Setup Workflow Tools
        run: brew install siderolabs/tap/talosctl

      - name: Pre-pull Image
        env:
          TALOSCONFIG: ${{ steps.talosconfig.outputs.filePath }}
        run: |
          NODE=$(talosctl config info --output json | jq --raw-output '.nodes[]' | shuf -n 1)
          talosctl -n $NODE image pull ${{ matrix.images }}

  # Summarize matrix https://git.luolix.topmunity/t/status-check-for-a-matrix-jobs/127354/7
  pre-pull-images-success:
    if: ${{ always() }}
    needs: ["pre-pull-images"]
    name: Pre-pull Images Successful
    runs-on: ubuntu-latest
    steps:
      - if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
        name: Check matrix status
        run: exit 1