main.yml

name: Publish Docker image
on:
  release:
    types: [published]
jobs:
  push_to_registry:
    name: Push Docker image to Docker Hub
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v2
    - name: Prepare
      id: prep
      run: |
        DOCKER_IMAGE=vsliouniaev/pass-cache
        VERSION=edge
        if [[ $GITHUB_REF == refs/tags/* ]]; then
          VERSION=${GITHUB_REF#refs/tags/}
        elif [[ $GITHUB_REF == refs/heads/* ]]; then
          VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
        elif [[ $GITHUB_REF == refs/pull/* ]]; then
          VERSION=pr-${{ github.event.number }}
        fi
        TAGS="${DOCKER_IMAGE}:${VERSION}"
        if [ "${{ github.event_name }}" = "push" ]; then
          TAGS="$TAGS,${DOCKER_IMAGE}:sha-${GITHUB_SHA::8}"
        fi
        echo ::set-output name=version::${VERSION}
        echo ::set-output name=tags::${TAGS}
        echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1
    - name: Login to DockerHub
      if: github.event_name != 'pull_request'
      uses: docker/login-action@v1
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}
    - name: Build and push
      uses: docker/build-push-action@v2
      with:
        context: .
        push: ${{ github.event_name != 'pull_request' }}
        tags: ${{ steps.prep.outputs.tags }}
        build-args: |
          version=${{ steps.prep.outputs.version }}
          created=${{ steps.prep.outputs.created }}
        labels: |
          org.opencontainers.image.source=${{ github.event.repository.html_url }}
          org.opencontainers.image.created=${{ steps.prep.outputs.created }}
          org.opencontainers.image.revision=${{ github.sha }}