name: CI

env:
  DEFAULT_DOCKER_IMAGE: nicolargo/glances
  NODE_ENV: ${{ (contains('refs/heads/master', github.ref) || startsWith(github.ref, 'refs/tags/v')) && 'prod' || 'dev' }}
  DOCKER_PLATFORMS: linux/amd64,linux/arm/v7,linux/arm64,linux/386

on:
  pull_request:
    branches: [ develop ]
  push:
    branches: [ master, develop ]
    tags:
      - v*

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ env.NODE_ENV }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-${{ env.NODE_ENV }}

      - name: Configure ENVs
        env:
          DOCKER_IMAGE: ${{ secrets.DOCKER_IMAGE || env.DEFAULT_DOCKER_IMAGE }}
          DOCKERFILE: ${{ env.NODE_ENV == 'prod' && './docker-files/Dockerfile' || './docker-files/dev.Dockerfile' }}
          PUSH_IMAGE: ${{ env.NODE_ENV == 'prod' && 'true' || 'false' }}
        run: |
          ls -la /tmp/.buildx-cache || true
          VERSION=latest

          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/v}
          fi

          if [[ $GITHUB_REF == refs/heads/develop ]]; then
            VERSION=dev
          fi

          echo "DOCKERFILE=${DOCKERFILE}" >> $GITHUB_ENV
          echo "VERSION=${VERSION}" >> $GITHUB_ENV
          echo "PUSH_IMAGE=${PUSH_IMAGE}" >> $GITHUB_ENV
          echo "TAGS=${DOCKER_IMAGE}:${VERSION}" >> $GITHUB_ENV
          echo "BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_ENV
          echo "VCS_REF=${GITHUB_SHA::8}" >> $GITHUB_ENV

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
        with:
          platforms: all

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
        with:
          version: latest

      - name: Login to DockerHub
        uses: docker/login-action@v1
        if: ${{env.PUSH_IMAGE == 'true'}}
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          push: ${{env.PUSH_IMAGE == 'true'}}
          tags: ${{env.TAGS}}
          build-args: |
            VERSION=${{env.VERSION}}
            BUILD_DATE=${{env.BUILD_DATE}}
            VCS_REF=${{env.VCS_REF}}
          context: .
          file: ${{env.DOCKERFILE}}
          platforms: ${{env.DOCKER_PLATFORMS}}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max