name: Build and Deploy mdBook

on:
  push:
    branches:
      - main

jobs:
  build-and-deploy:
    runs-on: docs-deployer

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Cache mdBook
        id: cache-mdbook
        uses: actions/cache@v3
        with:
          path: ~/.local/bin/mdbook
          key: ${{ runner.os }}-mdbook-0.4.36

      - name: Install mdBook if not cached
        # 只有在缓存未命中时才执行
        if: steps.cache-mdbook.outputs.cache-hit != 'true'
        run: |
          # --- ↓↓↓ 新增的修复步骤 ↓↓↓ ---
          # 在解压前，确保目标目录存在。-p 参数会创建所有必要的父目录。
          echo "Creating directory ~/.local/bin..."
          mkdir -p ~/.local/bin
          # --- ↑↑↑ 修复步骤结束 ↑↑↑ ---

          echo "Downloading and extracting mdBook..."
          curl -sL https://github.com/rust-lang/mdBook/releases/download/v0.4.36/mdbook-v0.4.36-x86_64-unknown-linux-gnu.tar.gz | tar xvz -C ~/.local/bin
          chmod +x ~/.local/bin/mdbook

      - name: Build mdBook docs
        # 使用缓存或刚刚安装的 mdbook 进行构建
        run: ~/.local/bin/mdbook build

      - name: Deploy to Gitea Pages Directory
        run: |
          TARGET_DIR="/mnt/gitea-pages/dao-os/dao-os-docs"
          SOURCE_DIR="./book"
          echo "🚀 Deploying to host via volume mount using 'cp'..."
          mkdir -p "$TARGET_DIR"
          find "$TARGET_DIR" -mindepth 1 -delete
          cp -r "$SOURCE_DIR"/. "$TARGET_DIR/"
          echo "✅ Deployment successful!"