kumomta/.github/workflows/redis.yml

on:
  pull_request:
    branches:
      - main
    paths:
      - "docker/redis/Dockerfile"
      - ".github/workflows/redis.yml"
  push:
    branches:
      - main
    paths:
      - "docker/redis/Dockerfile"
      - ".github/workflows/redis.yml"

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm/v7
          - linux/arm64
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v6
      - name: Docker meta
        if: ${{ github.event_name != 'pull_request' }}
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ghcr.io/kumocorp/redis
          tags: |
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
            type=ref,event=branch,enable=${{ github.ref != 'refs/heads/main' }}
            type=ref,event=pr
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
      - name: Log in to the Container registry
        if: ${{ github.event_name != 'pull_request' }}
        uses: docker/login-action@v4
        with:
          registry: https://ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build No Push
        if: ${{ github.event_name == 'pull_request' }}
        uses: docker/build-push-action@v7
        with:
          context: .
          file: docker/redis/Dockerfile
          platforms: ${{ matrix.platform }}
          push: false
      - name: Build and push by digest
        if: ${{ github.event_name != 'pull_request' }}
        id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          file: docker/redis/Dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          push: ${{ github.event_name != 'pull_request' }}
          outputs: type=image,name=ghcr.io/kumocorp/redis,push-by-digest=true,name-canonical=true,push=true
      - name: Export digest
        if: ${{ github.event_name != 'pull_request' }}
        id: digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"
          echo "DIGEST_NAME=$(echo ${{ matrix.platform }} | sed 's,/,-,g')" >> $GITHUB_OUTPUT
      - name: Upload digest
        if: ${{ github.event_name != 'pull_request' }}
        uses: actions/upload-artifact@v7
        with:
          name: digest-${{ steps.digest.outputs.DIGEST_NAME }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    if: ${{ github.event_name != 'pull_request' }}
    runs-on: ubuntu-latest
    needs:
      - build
    permissions:
      contents: read
      packages: write
    steps:
      - name: Download digests
        uses: actions/download-artifact@v8
        with:
          pattern: digest-*
          merge-multiple: true
          path: /tmp/digests
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ghcr.io/kumocorp/redis
          tags: |
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
            type=ref,event=branch,enable=${{ github.ref != 'refs/heads/main' }}
            type=ref,event=tag,enable=${{ github.ref_type == 'tag' }}
            type=ref,event=pr
      - name: Login to GHCR
        if: ${{ github.event_name != 'pull_request' }}
        uses: docker/login-action@v4
        with:
          registry: https://ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            ${{ github.event_name == 'pull_request' && '--dry-run' || '' }} \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf 'ghcr.io/kumocorp/redis@sha256:%s ' *)
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ghcr.io/kumocorp/redis:${{ steps.meta.outputs.version }}