Node.js 在节点js中查找包含文件的父文件夹

我希望能够通过将

startingPoint.txt

的路径传递给节点JS中的函数来查找

target.json

，给定以下文件夹结构：

- root
 - sub1
  - sub2
    startingPoint.txt
 target.json

我为它找到了一个名为

find-up

的节点包，但这可能需要不超过6行代码

---

---

以下是我目前拥有的：

import { join, dirname } from 'path';
import { existsSync } from 'fs';

export let MAX_BACK_STEPS = 50;

export function findUp(start: string, target: string, boundary?: {
  path: string,
  inclusive: boolean,
}): string | null {
  let currentDir = dirname(start);
  let lastTry = false;
  let backSteps = 0;
  while (backSteps++) {
    if (backSteps >= MAX_BACK_STEPS) {
      console.error("Too many back steps");
      return null;
    }

    if (boundary && boundary.path.includes(currentDir)) {
      if (boundary.inclusive && lastTry === false) {
        lastTry = true;
      } else {
        return null;
      }
    }

    const targetTestPath = join(currentDir, target);
    if (existsSync(targetTestPath)) {
      return targetTestPath;
    }

    currentDir = join(currentDir, "../");
  }
}

---

我知道这个老问题，但我刚刚实现了类似的东西，花了很多时间试图找到一个好的解决方案

因此，对于未来的探索者，这里是我使用path和fs模块的解决方案

const PATH = require('path');
const FS   = require('fs');

function findInPathAncestry(path, target) {

    let current_directory_path = PATH.normalize(path).split(PATH.sep);
    let result = false;

    while(current_directory_path.length && !result) {

        let current_path = current_directory_path.join(PATH.sep)+PATH.sep+target;

        if(FS.existsSync(current_path)) {

             result = current_path;
        }

        current_directory_path.pop();
    }

    return result;
}

用法示例：

// example file structure:
// C:\
// | - path\
// | --- to\
// | ----- start\
// | ------- at\
// | ----- findme.txt


let start_location = "C:\path\to\start\at";
let target_file    = "findme.txt";

console.log(findInPathAncestry(start_location, target_file));

// expected output:
// C:\path\to\findme.txt
// or false if file doesn't exist in path

通过使用PATH.normalize和PATH.sep，可以在windows和unix环境中执行此操作

// example file structure:
// C:\
// | - path\
// | --- to\
// | ----- start\
// | ------- at\
// | ----- findme.txt


let start_location = "C:\path\to\start\at";
let target_file    = "findme.txt";

console.log(findInPathAncestry(start_location, target_file));

// expected output:
// C:\path\to\findme.txt
// or false if file doesn't exist in path