---
name: ci

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]
  workflow_dispatch:
  schedule:
  - cron: '35 4 * * 4'  # weekly on thursday morning

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        ruby-version:
        - '2.5'
        - '2.6'
        - '2.7'
        - '3.0'
    steps:
    - uses: actions/checkout@v2
    - name: Set up Ruby ${{ matrix.ruby-version }}
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby-version }}
        bundler-cache: true  # runs 'bundle install' and caches installed gems automatically
    - name: Lint and Test
      run: |
        bundle exec rake ci

    # https://github.com/marketplace/actions/build-and-push-docker-images
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1

    - name: Test building Docker image for dyndnsd
      uses: docker/build-push-action@v2
      with:
        context: docker