build-push.yml

name: Build and Push

# Run workflow on pushes to main branch or by manual dispatch
on:
  push:
    branches:
      - main
  release:
    types: [published]
  workflow_dispatch:

jobs:

  build-publish:
    runs-on: ubuntu-latest
    name: Build and publish modulo image
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v2

      - name: Build image
        run: |
          docker build --tag modulo .
      - name: Login to GitHub Container Registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u "${{ github.actor }}" --password-stdin

      - name: Push latest image
        if: ${{ github.event_name != 'release' }}
        run: |
          IMAGE_NAME="${{ github.repository }}:latest"
          IMAGE_NAME="${IMAGE_NAME/_/-}"
          docker tag modulo ghcr.io/"${IMAGE_NAME}"
          docker push ghcr.io/"${IMAGE_NAME}"

      - name: Push tagged image
        if: ${{ github.event_name == 'release' }}
        run: |
          REF="${{ github.ref }}"
          TAG="${REF##*/}"
          IMAGE_NAME="${{ github.repository }}:${TAG}"
          IMAGE_NAME="${IMAGE_NAME/_/-}"
          docker tag modulo ghcr.io/"${IMAGE_NAME}"
          docker push ghcr.io/"${IMAGE_NAME}"