docker.yml

# Builds and Pushes Docker images for `latest` and semantic versioned tags or "releases".
# Runs on pushes to main for `latest`, and semantic versioned tags for "releases"
name: Docker Build and Push

on:
  push:
    branches:
      - main
    tags:
      - "*.*.*"

jobs:
  push:
    name: Build and Push Docker Image
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read

    steps:
      - uses: actions/checkout@v3

      - name: Build Docker Image
        run: docker build . --file Dockerfile --tag $(echo "${{ github.repository }}" | sed -e 's,.*/\(.*\),\1,') --label "runnumber=${GITHUB_RUN_ID}" --label "gitsha=${{ github.sha }}"

      - name: GitHub Container Registry Login
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin

      - name: Push Docker Image to GHCR
        run: |
          IMAGE_NAME=$(echo "${{ github.repository }}" | sed -e 's,.*/\(.*\),\1,')
          IMAGE_ID=ghcr.io/${{ github.repository }}
          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # Strip "v" prefix from tag name if exists
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # Use Docker `latest` convention
          [ "$VERSION" == "main" ] && VERSION=latest
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
          docker push $IMAGE_ID:$VERSION