name: Docker Merge

on:
  workflow_dispatch:
  push:
    branches: [ "main" ]
    paths-ignore:
      - '**/README.md'

jobs:
  merge-docker-manifest:
    runs-on: ubuntu-latest
    steps:
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ vars.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Create manifest images
        run: docker manifest create ${{ vars.DOCKERHUB_REPO }}:latest \
             --amend ${{ vars.DOCKERHUB_REPO }}:latest-amd64 \
             --amend ${{ vars.DOCKERHUB_REPO }}:latest-arm64

      - name: Push manifest images
        run: docker manifest push --purge ${{ vars.DOCKERHUB_REPO }}:latest