pull_request.yml

name: Validate pull request

on:
  pull_request:
    branches: [ 'master' ]

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:

      - name: Get release version
        id: version_number
        shell: bash
        run: |
          echo "RELEASE_VERSION=${GITHUB_REF:10}" >> $GITHUB_ENV
          echo "::set-output name=RELEASE_VERSION::${GITHUB_REF:10}"

          export BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
          echo "BUILD_DATE=${BUILD_DATE}" >> $GITHUB_ENV
          echo "::set-output name=BUILD_DATE::${BUILD_DATE}"

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@master
        with:
          install: true

      - name: Builder info
        run: |
          echo "Name:      ${{ steps.buildx.outputs.name }}"
          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
          echo "Status:    ${{ steps.buildx.outputs.status }}"
          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-single-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-single-buildx-

      - name: Build Alpine
        uses: docker/build-push-action@v4
        with:
          context: .
          push: false
          tags: |
            boky/alpine-bootstrap:latest
            boky/alpine-bootstrap:latest-alpine
          platforms: "linux/amd64" # linux/s390x: "rsyslog (no such package)"
          cache-from: type=local,src=/tmp/.buildx-cache/alpine

          build-args: |
            ALPINE_VERSION=alpine:latest
            VCS_REF=${{ steps.version_number.outputs.RELEASE_VERSION }}
            BUILD_DATE=${{ steps.version_number.outputs.BUILD_DATE }}