name: Build & Push TM Proto Builder
on:
  pull_request:
    paths:
      - "tools/proto/*"
  push:
    branches:
      - master
    paths:
      - "tools/proto/*"
  schedule:
    # run this job once a month to recieve any go or buf updates
    - cron: "* * 1 * *"

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.3.4
      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=tendermintdev/docker-build-proto
          VERSION=noop
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/}
          elif [[ $GITHUB_REF == refs/heads/* ]]; then
            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
              VERSION=latest
            fi
          fi
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          echo ::set-output name=tags::${TAGS}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1.5.0

      - name: Login to DockerHub
        uses: docker/login-action@v1.10.0
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Publish to Docker Hub
        uses: docker/build-push-action@v2.7.0
        with:
          context: ./tools/proto
          file: ./tools/proto/Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.prep.outputs.tags }}