const fs = require('fs');
let c = fs.readFileSync('src/index.html', 'utf8');

// 1. modules 兜底为空列表
c = c.replace(
  '  <div class="homepage">\n    <th:block th:each="mod : ${theme.config.homepage.modules}">',
  '  <div class="homepage">\n    <th:block th:with="modules = ${theme.config.homepage?.modules ?: #lists.toList()}">\n    <th:block th:each="mod : ${modules}">'
);
c = c.replace(
  '      </th:block>\n\n    </th:block>\n\n    <section class="section browse"',
  '      </th:block>\n\n    </th:block>\n    </th:block>\n\n    <section class="section browse"'
);

// 2. 所有 th:each="x : ${mod.xxx}" 加 ?: #lists.toList() 兜底
c = c.replace(/th:each="([^"]+) : \$\{mod\.(\w+)\}"/g, 'th:each="$1 : ${mod.$2 ?: #lists.toList()}"');

fs.writeFileSync('src/index.html', c);
console.log('done');