Node.js 开发和调试 ​

import { accessSync, readdirSync, statSync } from 'node:fs'

const fileOrDirFullPath = '文件或目录的全路径名'
const stats = statSync(fileOrDirFullPath)
if (stats.isDirectory()) 
  console.log('是目录')

else if (stats.isFile()) 
  console.log('是文件')

import { accessSync, constants } from 'node:fs'

const fileOrDirFullPath = '文件或目录的全路径'
try {
  accessSync(fileOrDirFullPath, constants.F_OK)
  console.log('文件或目录存在')
}
catch (err) {
  console.log('文件或目录不存在')
}

import { accessSync, constants } from 'node:fs'

const fileOrDirFullPath = '文件或目录的全路径'
try {
  accessSync(fileOrDirFullPath, constants.R_OK)
  console.log('文件或目录可读')
}
catch (err) {
  console.log('文件或目录不可读')
}

import { accessSync, constants } from 'node:fs'

const fileOrDirFullPath = '文件或目录的全路径'
try {
  accessSync(fileOrDirFullPath, constants.W_OK)
  console.log('文件或目录可写')
}
catch (err) {
  console.log('文件或目录不可写')
}

import { accessSync, constants } from 'node:fs'

const fileOrDirFullPath = '文件全路径'
try {
  accessSync(fileOrDirFullPath, constants.F_OK | constants.W_OK)
  console.log('文件存在且可写')
}
catch (err) {
  console.log('文件不存在或不可写')
}

import { readdirSync, statSync } from 'node:fs'

const dirFullPath = '指定目录的绝对路径'

// 返回dirFullPath目录下的所有文件夹和文件的名称
const allDirAndFileNameArr = readdirSync(dirFullPath)
allDirAndFileNameArr.map((dirOrFileName) => {
  console.log(dirOrFileName)
})

import path from 'node:path'
import { writeFileSync } from 'node:fs'
import { fileURLToPath } from 'node:url'
import chokidar from 'chokidar'

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

const watchJsonFile = path.resolve(__dirname, 'watchJson.json')

const watchDir = path.resolve(__dirname, '../articles')
console.log(`实时监控目录[ ${watchDir} ]变化, 并重新生成导航数据`)
const watcher = chokidar.watch(watchDir, {
  // 忽略软连接文件的监听
  followSymlinks: false,
  // 忽略启动时的监听
  ignoreInitial: true,
  awaitWriteFinish: {
    // 变动之后，只有在1分钟内没有再发生变化，才触发回调函数
    stabilityThreshold: 60000,
    // 轮询间隔1分钟
    pollInterval: 60000,
  },
  // 忽略代码文件和静态资源文件的变化监听
  ignored: [/.+\.(vue|js|ts|jsx|tsx|png|jpg|jpeg|gif|svg)/],
})

watcher.on('all', (event, path) => {
  if (path.match(/.+\/(demo|asserts)\/.*$/)) {
    // 所有资源路径中包含demo和asserts文件夹的都会手动触发vitepress更新
    return
  }
  console.log(`检测到文件/文件夹变化: ${event}, ${path}, 正在手动触发vitepress重启...、\r\n`)
  // 监听到变化，则将最新时间重写到watchJsonFile中，此时会触发vitepress重启
  writeFileSync(watchJsonFile, `{"updateTime":${new Date().getTime()}}`)
})

import { sep } from 'node:path'

console.log(sep)

import { join } from 'node:path'

join('/foo', 'bar', 'baz/asdf', 'quux', '..')
// 返回: '/foo/bar/baz/asdf'

join('foo', {}, 'bar')
// 抛出 'TypeError: Path must be a string. Received {}'

import { join } from 'node:path'

const parentFullPath = join(__dirname, '../')

// import.meta.url 返回模块的绝对的 `file:` URL。
// url模块中fileURLToPath()函数，返回完全解析的特定于平台的 Node.js 文件路径
// path模块中dirname()函数，返回路径的目录路径
import { fileURLToPath } from 'node:url'
import { dirname } from 'node:path'

const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)