name: Documentation

on:
  push:
    branches: [ '*' ]
  pull_request:
    branches: [ master ]

jobs:
  docs:
    runs-on: ubuntu-18.04
    steps:
      - name: Cancel previous runs
        uses: styfle/cancel-workflow-action@0.9.1
        with:
          access_token: ${{ github.token }}
      - uses: actions/checkout@v2
      - name: Use Node.js
        uses: actions/setup-node@v1
        with: { node-version: '10' }
      - name: Setup tools
        run: |
          sudo sh -c "echo ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true | debconf-set-selections"
          sudo apt-get update && sudo apt-get install -y calibre msttcorefonts
          builder/assets/install_gitbook.sh
          npm install markdownlint-cli@0.28.1 -g # FIXME: https://github.com/DavidAnson/markdownlint/issues/435
          npm install svgexport -g
          gitbook -V
          markdownlint -V
      - name: Run markdownlint
        run: markdownlint docs
      - name: Check Assets
        run: |
          ./check_assets_size.py
          ./check_unused_assets.py
      - name: Build GitBook
        run: |
         gitbook install
         gitbook build
      - name: Generate PDF
        id: generate-pdf
        env:
          GITBOOK_SKIP_PDF: ${{ secrets.GITBOOK_SKIP_PDF }}
        continue-on-error: ${{ env.GITBOOK_SKIP_PDF != '' }}
        if: ${{ github.event_name == 'push' }}
        run: |
          for i in 1 2 3 4; do gitbook pdf ./ _book/clover.pdf && break || sleep 1; done
          sudo apt-get -q install ghostscript
          gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile=_book/clover_ru_compressed.pdf _book/clover_ru.pdf
          gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile=_book/clover_en_compressed.pdf _book/clover_en.pdf
          rm _book/clover_ru.pdf && mv _book/clover_ru_compressed.pdf _book/clover_ru.pdf
          rm _book/clover_en.pdf && mv _book/clover_en_compressed.pdf _book/clover_en.pdf
          ls -lah _book/clover*.pdf
          echo '::set-output name=GITBOOK_PDF_OK::1'
      - name: Download older PDFs
        if: ${{ !steps.generate-pdf.outputs.GITBOOK_PDF_OK }}
        run: |
          rm _book/clover*.pdf
          wget --no-verbose https://clover.coex.tech/clover_ru.pdf -P _book/
          wget --no-verbose https://clover.coex.tech/clover_en.pdf -P _book/
      - name: Deploy
        uses: JamesIves/github-pages-deploy-action@4.1.3
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
        with:
          branch: gh-pages
          folder: _book
          clean: true
          single-commit: true # to avoid multiple copies of large pdf files