book-cliiii/lib/utils/writeFileTree.js

Command line interface for front end project

const fs = require('fs-extra');
const path = require('path');

/**
 * 在文件树中删除文件
 * @param {String} directory - 文件路径
 * @param {String} newFiles - 新文件内容
 * @param {String} previousFiles - 前置文件
 */
function deleteRemovedFiles(directory, newFiles, previousFiles) {
  // 获取不在新文件系统中且仍然存在的所有文件
  const filesToDelete = Object.keys(previousFiles).filter(
    (filename) => !newFiles[filename],
  );

  // 删除这些文件中的每一个
  return Promise.all(
    filesToDelete.map((filename) => fs.unlink(path.join(directory, filename))),
  );
}

module.exports = async function writeFileTree(dir, files, previousFiles) {
  if (process.env.BOOK_CLI_SKIP_WRITE) {
    return;
  }
  if (previousFiles) {
    await deleteRemovedFiles(dir, files, previousFiles);
  }
  Object.keys(files).forEach((name) => {
    const filePath = path.join(dir, name);
    fs.ensureDirSync(path.dirname(filePath));
    fs.writeFileSync(filePath, files[name]);
  });
};