nodejs实现合并文件

nodejs实现递归读取文件并合并成一个

var fs = require("fs");
var path = require("path");

function readFileList(dir, filesList = []) {
  const files = fs.readdirSync(dir);
  // console.log(files);

  files.forEach((item, index) => {
    var fullPath = path.join(dir, item);
    const stat = fs.statSync(fullPath);
    if (stat.isDirectory()) {
      readFileList(path.join(dir, item), filesList); //递归读取文件
    } else {
      const reg = /.md/;
      reg.test(fullPath) && filesList.push(fullPath);
    }
  });
  return filesList;
}

var filesList = [];

readFileList("./test", filesList);

fs.writeFile("README.md", "", () => {}); //先清空

for (const item of filesList) {
  let content = fs.readFileSync(item, "utf-8");
  console.log(content);
  fs.appendFile("README.md", content, () => {});
}