name: Docker Build and Push (ext)

on:
  push:
    branches:
      - ext

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

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

      - name: Derive DOCKER_TAG from commit message or fallback
        id: tag
        run: |
          msg=$(git log -1 --pretty=%B | tr -d '\r')
          tag=$(printf '%s' "$msg" | sed -n 's/.*docker_tag=\([A-Za-z0-9._-]\+\).*/\1/p' | head -n1)
          if [ -z "$tag" ]; then tag=dev-test; fi
          tag=$(printf '%s' "$tag" | tr -d '[:space:]')
          echo "DOCKER_TAG=$tag" >> $GITHUB_ENV
          echo "tag=$tag" >> $GITHUB_OUTPUT

      - name: Log in to registry
        uses: docker/login-action@v3
        with:
          registry: git.4nkweb.com
          username: ${{ secrets.USER }}
          password: ${{ secrets.TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: linux/amd64
          push: true
          tags: |
            git.4nkweb.com/4nk/ihm_client:${{ env.DOCKER_TAG }}