cache-docker-images.yml

name: Cache Docker Images CI
on:
  workflow_call:
    secrets:
      DOCKERHUB_USERNAME:
        required: false
      DOCKERHUB_TOKEN:
        required: false

jobs:
  check-dockerhub-secrets-present:
    runs-on: [self-hosted, ubuntu-20.04, X64, small]
    env:
      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
      DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
    name: Check if DockerHub secrets are present
    outputs:
      secrets_present: ${{ steps.check-secrets-present-step.outputs.DOCKERHUB_SECRET_PRESENT }}
    steps:
      - id: check-secrets-present-step
        run: |
          echo DOCKERHUB_SECRET_PRESENT=${{ env.DOCKERHUB_USERNAME != '' && env.DOCKERHUB_TOKEN != '' }} >> $GITHUB_OUTPUT

  changes:
    needs: [ check-dockerhub-secrets-present ]
    if: ${{ always() && needs.check-dockerhub-secrets-present.outputs.secrets_present == 'true' }}
    runs-on: [self-hosted, ubuntu-20.04, X64, small]
    name: Filter commit changes
    outputs:
      cache_images: ${{ steps.filter.outputs.cache_images }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Filter commit changes
        uses: dorny/paths-filter@v3
        id: filter
        with:
          base: ${{ github.ref }}
          list-files: "json"
          filters: |
            cache_images:
              - 'docker/compose.yml'
              - 'docker/compose-local-dev.overrides.yml'
              - 'docker/compose-local-dev-traces-v2.overrides.yml'

  pull-and-cache-images:
    needs: [ check-dockerhub-secrets-present, changes ]
    if: ${{ always() && needs.check-dockerhub-secrets-present.outputs.secrets_present == 'true' && needs.changes.outputs.cache_images == 'true' }}
    runs-on: [self-hosted, ubuntu-20.04, X64, small]
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Pull docker images from compose
        continue-on-error: true
        run: |
          docker compose -f docker/compose.yml -f docker/compose-local-dev-traces-v2.overrides.yml --profile l1 --profile l2 pull
      - name: Save Docker images
        run: |
          mkdir -p ~/docker-images
          images=$(docker compose -f docker/compose.yml -f docker/compose-local-dev-traces-v2.overrides.yml --profile l1 --profile l2 config | grep "image:" | awk '{print $2}')
          for image in $images; do
            imageFileName=$(echo $image | sed -e 's|.*/||' -e 's|:|-|' -e 's/\./_/g')
            echo $image - ${imageFileName}
            docker save $image > ~/docker-images/${imageFileName}.tar
          done
      - name: Cache common docker images
        continue-on-error: true
        uses: actions/cache/save@v4.0.2
        with:
          path: ~/docker-images
          key: cached-images