printcss.yml

name: PrintCSS

on:
  workflow_dispatch:
    inputs:
      tag_name:
        description: "Tag name for release (empty for no release)"
        required: false
        default: contiguous
  push:
    branches: [ "main" ]
    tags: ["v[0-9]+.[0-9]+.[0-9]+*"]
    paths: 
      - README.md
      - "src/现代C\\+\\+题目/**"
      - .github/workflows/printcss.yml
  pull_request:
    branches: [ "main" ]
    paths: 
      - README.md
      - "src/现代C\\+\\+题目/**"
      - .github/workflows/printcss.yml

jobs:
  prepare:
    runs-on: ubuntu-latest
    outputs:
      cache-hit: ${{ steps.cache.outputs.cache-hit }}
    steps:
      - uses: actions/cache/restore@v4
        id: cache
        with:
          lookup-only: true
          key: treesitter-cli
          path: ~/tree-sitter/tree-sitter
  build-tree-sitter:
    needs: prepare
    if: needs.prepare.outputs.cache-hit != 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          repository: tree-sitter/tree-sitter
      - uses: actions/checkout@v4
        with:
          path: lhw
      - name: Apply CLI patch
        run: |
          git apply --check --apply lhw/.github/0001-Suppress-HTML-header-and-footer-for-CLI-highlight.patch
          git apply --check --apply lhw/.github/0002-Reduce-lang_not_found-message.patch
      - run: rustup toolchain install stable-x86_64-unknown-linux-gnu --profile minimal
      - uses: Swatinem/rust-cache@v2
      
      - name: Build CLI
        run: |
          cargo build --release
          mkdir ~/tree-sitter
          cp target/release/tree-sitter ~/tree-sitter/

      - name: Save cache
        uses: actions/cache/save@v4
        with:
          path: ~/tree-sitter/tree-sitter
          key: treesitter-cli
  
  build-printcss:
    needs: [prepare, build-tree-sitter]
    if: ${{ !cancelled() }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/cache/restore@v4
        with:
          key: treesitter-cli
          path: ~/tree-sitter/tree-sitter
          fail-on-cache-miss: true
      - name: Setup tree-sitter
        run: |
          echo "$HOME/tree-sitter" >> $GITHUB_PATH
          mkdir -p ~/.config/tree-sitter
          cp .github/tree-sitter.json ~/.config/tree-sitter/config.json
      - uses: actions/cache@v4
        id: cache-tsp
        with:
          key: treesitter-parsers
          path: |
            ~/.cache/tree-sitter/
            ~/tree-sitter-parsers/
      - name: Fetch tree-sitter parsers
        if: steps.cache-tsp.outputs.cache-hit != 'true'
        run: |
          mkdir -p ~/tree-sitter-parsers
          cd ~/tree-sitter-parsers/
          git clone --depth 1 --no-tags https://github.com/tree-sitter/tree-sitter-cpp.git
          pushd tree-sitter-cpp
          npm install
          popd
      - name: Dump tree-sitter parsers
        run: |
          tree-sitter dump-languages

      - uses: actions/setup-node@v4
        with:
          node-version: '>=18'
      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'
          cache: 'pip'
      - run: python3 -m pip install -r requirements.txt
      
      - name: Configure mit2html and pagedgen
        run: |
          pushd src/现代C++题目/
          pushd mit2html
          npm install
          popd
          pushd pagedgen
          npm install
          npx playwright install chromium
          popd
          popd
      
      - name: Generate HTML
        run: |
          python3 src/现代C++题目/generate.py
      
      - name: Generate PDF
        run: |
          node src/现代C++题目/pagedgen/cli.js generated.html -o homework_problemtext.pdf --additional-script src/现代C++题目/remove_details.js
          node src/现代C++题目/pagedgen/cli.js generated.html -o homework_full.pdf --additional-script src/现代C++题目/unwrap_details.js
      
      - name: Update artifacts
        uses: actions/upload-artifact@v4
        with:
          name: pdf
          path: |
            homework_problemtext.pdf
            homework_full.pdf
  
  release:
    runs-on: ubuntu-latest
    needs: build-printcss  
    if: (github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')) || (github.event_name == 'schedule') || (github.event_name == 'workflow_dispatch' && github.event.inputs.tag_name != '') && !cancelled()
    permissions:
      contents: write
    steps:
    - uses: actions/checkout@v4

    - name: Download artifacts
      uses: actions/download-artifact@v4
      with:
        name: pdf
        path: artifacts
    
    - name: Archive and compress
      run: |
        find artifacts/ -printf "%P\n" | tar -cvf adocs.tar --no-recursion -C artifacts/ -T -
        zstd -z -1 adocs.tar -o loser-homework-pdf.tar.zst
    
    - if: github.event_name == 'workflow_dispatch'
      run: echo "TAG_NAME=${{ github.event.inputs.tag_name }}" >> $GITHUB_ENV

    - if: github.event_name == 'schedule'
      run: echo 'TAG_NAME=contiguous' >> $GITHUB_ENV

    - if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
      run: |
        TAG_NAME=${{ github.ref }}
        echo "TAG_NAME=${TAG_NAME#refs/tags/}" >> $GITHUB_ENV
        echo "DRAFT=true" >> $GITHUB_ENV

    - if: env.TAG_NAME == 'contiguous'
      name: Delete previous contiguous
      env:
        GH_TOKEN: ${{ github.token }}
      run: |
        echo 'PRERELEASE=true' >> $GITHUB_ENV
        gh release delete contiguous --yes || true
        git config user.name github-actions
        git config user.email github-actions@github.com
        git push origin :contiguous || true
        sleep 2
    - name: Rename release files
      run: |
        mv loser-homework-pdf.tar.zst loser-homework-pdf-${{ env.TAG_NAME }}.tar.zst
    - name: Release
      uses: softprops/action-gh-release@v1
      if: github.event_name != 'pull_request' && env.TAG_NAME != ''
      with:
        name: "Docs ${{ env.TAG_NAME }}"
        prerelease: ${{ env.PRERELEASE != '' }}
        files: loser-homework-pdf-${{ env.TAG_NAME }}.tar.zst
        tag_name: ${{ env.TAG_NAME }}
        draft: ${{ env.DRAFT != '' || null }}