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/**"]

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: Configure 1password
        uses: 1password/load-secrets-action/configure@v2
        with:
          service-account-token: ${{ secrets.ONEPASS_SA_TOKEN }}

      - name: Get Secrets
        uses: 1password/load-secrets-action@v2
        with:
          export-env: true
        env:
          BOT_APP_ID: op://Kubernetes/github-bot/BOT_APP_ID
          BOT_APP_PRIVATE_KEY: op://Kubernetes/github-bot/BOT_APP_PRIVATE_KEY

      - name: Generate Token
        uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ env.BOT_APP_ID }}
          private-key: ${{ env.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"]
    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: Configure 1password
        uses: 1password/load-secrets-action/configure@v2
        with:
          service-account-token: ${{ secrets.ONEPASS_SA_TOKEN }}

      - name: Get Secrets
        uses: 1password/load-secrets-action@v2
        with:
          export-env: true
        env:
          BOT_APP_ID: op://Kubernetes/github-bot/BOT_APP_ID
          BOT_APP_PRIVATE_KEY: op://Kubernetes/github-bot/BOT_APP_PRIVATE_KEY

      - name: Generate Token
        uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ env.BOT_APP_ID }}
          private-key: ${{ env.BOT_APP_PRIVATE_KEY }}

      - name: Setup mise
        uses: jdx/mise-action@v2
        with:
          mise_toml: |
            [tools]
            "aqua:mikefarah/yq" = "latest"

      - name: Checkout Default Branch
        uses: actions/checkout@v4
        with:
          token: ${{ steps.app-token.outputs.token }}
          ref: ${{ github.event.repository.default_branch }}
          path: default

      - name: Checkout Pull Request Branch
        uses: actions/checkout@v4
        with:
          token: ${{ steps.app-token.outputs.token }}
          path: pull

      - name: Gather Images in Default Branch
        uses: docker://ghcr.io/allenporter/flux-local:v6.1.1
        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:v6.1.1
        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: |
          images=$(jq --compact-output --raw-input --null-input '[inputs]' < <(grep -vf default.txt pull.txt))
          echo "images=${images}" >> $GITHUB_OUTPUT
          echo "${images}"
          echo "### Images" >> $GITHUB_STEP_SUMMARY
          echo "${images}" | jq --raw-output 'to_entries[] | "* \(.value)"' >> $GITHUB_STEP_SUMMARY

  generate-matrix:
    if: ${{ needs.extract-images.outputs.matrix != '[]' }}
    name: Generate Matrix
    runs-on: ubuntu-latest
    needs: ["changed-clusters", "extract-images"]
    outputs:
      matrix: ${{ steps.generate-matrix.outputs.matrix }}
    steps:
      - name: Setup mise
        uses: jdx/mise-action@v2
        with:
          mise_toml: |
            [tools]
            "aqua:mikefarah/yq" = "latest"

      - name: Generate Combined Matrix
        id: generate-matrix
        run: |
          images=${{ needs.extract-images.outputs.matrix }}
          clusters=${{ needs.changed-clusters.outputs.matrix }}

          # Define the talosconfig mapping as a valid JSON object
          configs=$(echo "${clusters[@]}" | jq -n 'reduce inputs as $cluster (
            {};
            .[$cluster] = "op://Kubernetes/kubernetes/TALOSCONFIG_" + ($cluster | split("/")[1] | ascii_upcase)
          )')

          combined=$(echo "$images" | yq eval -j '
            . as $images |
            '"$clusters"' as $clusters |
            '"$configs"' as $configs |
            [
              $images[] as $image |
              $clusters[] as $cluster |
              {
                image: $image,
                cluster: $cluster,
                talosconfig: $configs[$cluster]
              }
            ]
          ')

          # Output the combined result
          echo "Combined: $combined"

          # Save to GITHUB_OUTPUT
          echo "matrix=$combined" >> $GITHUB_OUTPUT

      - name: Debug Combined Matrix
        run: echo "${{ steps.generate-matrix.outputs.matrix }}"

  pre-pull-images:
    if: ${{ needs.generate-matrix.outputs.matrix != '[]' }}
    name: Pre-pull Images
    runs-on: ["gha-runner-scale-set"]
    needs: ["generate-matrix"]
    strategy:
      matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
      max-parallel: 4
      fail-fast: false
    steps:
      - name: Configure 1password
        uses: 1password/load-secrets-action/configure@v2
        with:
          service-account-token: ${{ secrets.ONEPASS_SA_TOKEN }}

      - name: Get Secrets
        uses: 1password/load-secrets-action@v2
        with:
          export-env: true
        env:
          TALOSCONFIG: ${{ matrix.talosconfig }}

      - name: Setup mise
        uses: jdx/mise-action@v2
        with:
          mise_toml: |
            [tools]
            "aqua:siderolabs/talos" = "latest"

      - name: Pre-pull Image
        run: talosctl -n $NODE_IP image pull ${{ matrix.images }}

  # Summarize matrix https://github.community/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