build.yml

name: GitHub Actions
on: [push]
jobs:

  build:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v1

      - name: Build the Docker image
        run: docker build --file Dockerfile --tag docker.pkg.github.com/${{ github.repository }}/grafeas-oracle:${{ github.sha }} .

      - name: Log in to registry
        if: github.ref == 'refs/heads/master'
        run: docker login docker.pkg.github.com -u ${{ github.actor }} -p ${{ secrets.package_registry_token }}

      # this will cause an issue if we run two jobs simultaneously and the latest one finishes after the first
      # we can get around this later by doing semver properly
      - name: Tag the Docker image as latest
        if: github.ref == 'refs/heads/master'
        run: docker tag docker.pkg.github.com/${{ github.repository }}/grafeas-oracle:${{ github.sha }} docker.pkg.github.com/${{ github.repository }}/grafeas-oracle:latest

      - name: Publish to GitHub Package Registry
        if: github.ref == 'refs/heads/master'
        run: docker push docker.pkg.github.com/${{ github.repository }}/grafeas-oracle:${{ github.sha }} && docker push docker.pkg.github.com/${{ github.repository }}/grafeas-oracle:latest