push-docker-on-release.yml

name: Build and Push Docker Image

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      release_tag:
        description: "Release tag to build and push"
        required: true

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read # Allows read access to the repository code
      packages: write # Allows pushing images to GitHub Container Registry

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

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

      - name: Determine the release tag
        id: get_tag
        run: |
          if [ "${{ github.event_name }}" == "release" ]; then
            echo "tag=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
          else
            echo "tag=${{ github.event.inputs.release_tag }}" >> $GITHUB_OUTPUT
          fi

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:${{ steps.get_tag.outputs.tag }}
          # platforms: linux/arm64/v8,darwin/amd64,linux/amd64,windows/amd64,linux/amd64 # was what I was aiming for 
          # but locally I only got to these 3 (specifically linux/arm64/v8 but yeah)
          platforms: linux/arm64,linux/amd64