publish-dockerdefault.yaml

name: Build and Publish Docker Image to GitHub Packages

# This workflow is run on any push to main, or on push tag when it starts with a 'v'
on:
  push: 
    branches: 
      - main
    tags:
      - 'v*'
  # This enables a workflow to be triggered manually
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository_owner }}/haxall

jobs:
  build-and-publish-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout the repository
        uses: actions/checkout@v4

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GitHub Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # https://github.com/docker/metadata-action?tab=readme-ov-file#latest-tag
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v3
        with:
          flavor: |
            latest=auto
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            # tag with version number upon "git push tag"
            type=match,pattern=v(.*),group=1
            # set latest tag for default branch
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
            # leave this on
            type=ref,event=branch

      # The github 'docker/bake-action' runs into a registry error... 
      # Using https://github.com/docker/build-push-action
      - name: Build & push image with Github Action
        uses: docker/build-push-action@v6
        with:
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          #since the context is root, that's where the .dockerignore needs to be.
          context: "{{defaultContext}}:."
          file: ./docker/Dockerfile
          push: true
          pull: true
          build-args: 
            DB_NAME=haxall