retrodeck-builder/.github/workflows/docker.yml

name: "Build and Publish Docker Image"

on:
  push:
    paths:
      - "Dockerfile"  # Trigger only when the Dockerfile is modified
      - ".github/workflows/docker.yml"  # Also triggers when the workflow itself is updated

env:
  IMAGE_NAME: ghcr.io/retrodeck/retrodeck-builder:${{ github.sha }}  # Image name with SHA tag

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v2

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build Docker Image
        run: |
          docker build -t $IMAGE_NAME .

      - name: Push Docker Image to GitHub Container Registry
        run: |
          docker push $IMAGE_NAME

      - name: Tag as Latest
        if: github.ref == 'refs/heads/main'  # Only tag as 'latest' on the main branch
        run: |
          docker tag $IMAGE_NAME ghcr.io/retrodeck/retrodeck-builder:latest
          docker push ghcr.io/retrodeck/retrodeck-builder:latest