name: CI Build

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the main branch
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  schedule:
    - cron: '30 6 * * 1'  # At 06:30 on Monday, every Monday.

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # http://man7.org/linux/man-pages/man1/date.1.html
      - name: Create Cache Key
        id: cache-key
        run: |
          echo "::set-output name=key::$(/bin/date -u "+%Y%U")"
        shell: bash

      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2

      # Enable caching of Docker layers
      - uses: satackey/action-docker-layer-caching@v0.0.8
        continue-on-error: true
        with:
          key: docker-cache-${{ steps.cache-key.outputs.key }}-{hash}
          restore-keys: |
            docker-cache-${{ steps.cache-key.outputs.key }}-

      # Run the make script
      - name: Make build
        run: make build