name: Book

on:
  push:
    branches: ["main"]
  pull_request:
    branches: ["main"]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Cache Ruby
        id: cache-ruby
        uses: actions/cache@v4
        with:
          path: rubies
          key: ${{ runner.os }}-ruby
      - name: Install Ruby
        if: steps.cache-ruby.outputs.cache-hit != 'true'
        env:
          CC: clang
        run: |
          url="https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.4.tar.gz"
          prefix=`pwd`/rubies/ruby-3.4
          mkdir rubies
          mkdir ruby_src
          curl -sSL $url | tar -xz
          cd ruby-3.4.4
          mkdir build
          cd build
          ../configure --without-shared --prefix=$prefix
          make install
          echo $prefix/bin >> $GITHUB_PATH
      - name: Add Ruby to PATH
        run: |
          prefix=`pwd`/rubies/ruby-3.4
          echo $prefix/bin >> $GITHUB_PATH
      - name: Install latest mdbook
        run: |
          tag=$(curl 'https://api.github.com/repos/rust-lang/mdbook/releases/latest' | jq -r '.tag_name')
          url="https://github.com/rust-lang/mdbook/releases/download/${tag}/mdbook-${tag}-x86_64-unknown-linux-gnu.tar.gz"
          mkdir mdbook
          curl -sSL $url | tar -xz --directory=./mdbook
          echo `pwd`/mdbook >> $GITHUB_PATH
      - name: Test Book
        run: |
          cd book
          export CARGO_MANIFEST_DIR=$(pwd)
          cargo build
          mdbook test -L target/debug/deps/