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Dir : ~/var/www/invoice/node_modules/fs-extra/lib/ensure/

View File Name : link.js

'use strict'

const u = require('universalify').fromCallback
const path = require('path')
const fs = require('graceful-fs')
const mkdir = require('../mkdirs')
const pathExists = require('../path-exists').pathExists
const { areIdentical } = require('../util/stat')

function createLink (srcpath, dstpath, callback) {
  function makeLink (srcpath, dstpath) {
    fs.link(srcpath, dstpath, err => {
      if (err) return callback(err)
      callback(null)
    })
  }

  fs.lstat(dstpath, (_, dstStat) => {
    fs.lstat(srcpath, (err, srcStat) => {
      if (err) {
        err.message = err.message.replace('lstat', 'ensureLink')
        return callback(err)
      }
      if (dstStat && areIdentical(srcStat, dstStat)) return callback(null)

      const dir = path.dirname(dstpath)
      pathExists(dir, (err, dirExists) => {
        if (err) return callback(err)
        if (dirExists) return makeLink(srcpath, dstpath)
        mkdir.mkdirs(dir, err => {
          if (err) return callback(err)
          makeLink(srcpath, dstpath)
        })
      })
    })
  })
}

function createLinkSync (srcpath, dstpath) {
  let dstStat
  try {
    dstStat = fs.lstatSync(dstpath)
  } catch {}

  try {
    const srcStat = fs.lstatSync(srcpath)
    if (dstStat && areIdentical(srcStat, dstStat)) return
  } catch (err) {
    err.message = err.message.replace('lstat', 'ensureLink')
    throw err
  }

  const dir = path.dirname(dstpath)
  const dirExists = fs.existsSync(dir)
  if (dirExists) return fs.linkSync(srcpath, dstpath)
  mkdir.mkdirsSync(dir)

  return fs.linkSync(srcpath, dstpath)
}

module.exports = {
  createLink: u(createLink),
  createLinkSync
}