esphome/.github/workflows/docker-lint-build.yml

name: Build and publish lint docker image

# Only run when docker paths change
on:
  push:
    branches: [dev]
    paths:
      - 'docker/Dockerfile.lint'
      - 'requirements.txt'
      - 'requirements_optional.txt'
      - 'requirements_test.txt'
      - 'platformio.ini'
      - '.github/workflows/docker-lint-build.yml'

jobs:
  publish-docker-lint-iage:
    name: Build docker containers
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set TAG
        run: |
          echo "TAG=1.1" >> $GITHUB_ENV          
      - name: Pull for cache
        run: |
          docker pull "esphome/esphome-lint:latest" || true          
      - name: Build
        run: |
          docker build \
            --cache-from "esphome/esphome-lint:latest" \
            --file "docker/Dockerfile.lint" \
            --tag "esphome/esphome-lint:latest" \
            --tag "esphome/esphome-lint:${TAG}" \
            .          
      - name: Log in to docker hub
        env:
          DOCKER_USER: ${{ secrets.DOCKER_USER }}
          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
        run: docker login -u "${DOCKER_USER}" -p "${DOCKER_PASSWORD}"
      - run: |
          docker push "esphome/esphome-lint:${TAG}"
          docker push "esphome/esphome-lint:latest"