name: Deploy
on:
  push:
    branches:
      - main
    tags:
      - 'v*.*.*'
jobs:
  assets:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Install Erlang & Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: '24.0'
          elixir-version: '1.12.0'
      - name: Cache Mix
        uses: actions/cache@v2
        with:
          path: |
            deps
            _build
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-
      # Note: we need to get Phoenix and LV because package.json points to them directly
      - name: Install mix dependencies
        run: mix deps.get
      - name: Install Node
        uses: actions/setup-node@v2
        with:
          node-version: '14.x'
      - name: Cache npm dependencies
        uses: actions/cache@v2
        with:
          path: ~/.npm
          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-node-
      - name: Install npm dependencies
        run: npm ci --prefix assets
      - name: Build assets
        run: npm run deploy --prefix assets
      - name: Update assets
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: Update assets
          file_pattern: priv/static
  docker:
    # The assets job may push new commit, so we wait for it
    needs: assets
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: livebook/livebook
          tags: |
            type=semver,pattern={{version}}
            type=edge,branch=main
      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-
      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          # TODO: switch to type=gha once available:
          # * pending PR: https://github.com/moby/buildkit/pull/1974
          # * context: https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md#github-cache
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new
      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache