name: "Deploy Docs"
on:
  push:
    branches: [master]

jobs:
  # https://github.com/marketplace/actions/deploy-to-github-pages
  build-docs-deploy:
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout 🛎️
        uses: actions/checkout@v2
        # If you're using actions/checkout@v2 you must set persist-credentials to false in most cases for the deployment to work correctly.
        with:
          persist-credentials: false
      - uses: actions/setup-python@v4
        with:
          python-version: 3.8

      - id: 'auth'
        name: 'Authenticate to Google Cloud'
        uses: 'google-github-actions/auth@v0'
        with:
          credentials_json: ${{ secrets.GCS_SA_KEY }}

      - name: Setup gcloud
        uses: 'google-github-actions/setup-gcloud@v0'
        with:
          project_id: ${{ secrets.GCS_PROJECT }}

      # Note: This uses an internal pip API and may not always work
      # https://github.com/actions/cache/blob/master/examples.md#multiple-oss-in-a-workflow
      - name: Cache pip
        uses: actions/cache@v3
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-deploy-docs-pip-${{ hashFiles('requirements/app/*.txt') }}
          restore-keys: |
            ${{ runner.os }}-deploy-docs-pip-

      - name: Install dependencies
        env:
          FREEZE_REQUIREMENTS: 1
        run: |
          sudo apt-get update
          sudo apt-get install -y cmake pandoc
          pip --version
          pip install -e . --quiet -r requirements/app/docs.txt --find-links https://download.pytorch.org/whl/cpu/torch_stable.html
          sudo apt-get update && sudo apt-get install -y texlive-latex-extra dvipng texlive-pictures
          pip list
        shell: bash

      - name: Make Documentation
        working-directory: ./docs/source-app
        run: |
          # First run the same pipeline as Read-The-Docs
          make clean
          make html --jobs 2

      - name: Deploy 🚀
        uses: JamesIves/github-pages-deploy-action@v4.4.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: gh-pages # The branch the action should deploy to.
          folder: docs/build/html # The folder the action should deploy.
          clean: true # Automatically remove deleted files from the deploy branch
          target-folder: docs # If you'd like to push the contents of the deployment folder into a specific directory
          single-commit: true # you'd prefer to have a single commit on the deployment branch instead of full history
        if: success()

      # Uploading docs to GCS so they can be served on lightning.ai
      - name: Upload to GCS 🪣
        run: |-
          gsutil -m rsync -d -R docs/build/html/ gs://${{ secrets.GCS_BUCKET }}
        if: success()