ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: opt / alt / alt-nodejs6 / root / usr / lib / node_modules / npm / lib / utils

module.exports = link
link.ifExists = linkIfExists

var fs = require('graceful-fs')
var chain = require('slide').chain
var mkdir = require('mkdirp')
var rm = require('./gently-rm.js')
var path = require('path')
var npm = require('../npm.js')

function linkIfExists (from, to, gently, cb) {
  fs.stat(from, function (er) {
    if (er) return cb()
    fs.readlink(to, function (er, fromOnDisk) {
      // if the link already exists and matches what we would do,
      // we don't need to do anything
      if (!er) {
        var toDir = path.dirname(to)
        var absoluteFrom = path.resolve(toDir, from)
        var absoluteFromOnDisk = path.resolve(toDir, fromOnDisk)
        if (absoluteFrom === absoluteFromOnDisk) return cb()
      }
      link(from, to, gently, cb)
    })
  })
}

function resolveIfSymlink (maybeSymlinkPath, cb) {
  fs.lstat(maybeSymlinkPath, function (err, stat) {
    if (err) return cb.apply(this, arguments)
    if (!stat.isSymbolicLink()) return cb(null, maybeSymlinkPath)
    fs.readlink(maybeSymlinkPath, cb)
  })
}

function ensureFromIsNotSource (from, to, cb) {
  resolveIfSymlink(from, function (err, fromDestination) {
    if (err) return cb.apply(this, arguments)
    if (path.resolve(path.dirname(from), fromDestination) === path.resolve(to)) {
      return cb(new Error('Link target resolves to the same directory as link source: ' + to))
    }
    cb.apply(this, arguments)
  })
}

function link (from, to, gently, abs, cb) {
  if (typeof cb !== 'function') {
    cb = abs
    abs = false
  }
  if (typeof cb !== 'function') {
    cb = gently
    gently = null
  }
  if (npm.config.get('force')) gently = false

to = path.resolve(to)
  var toDir = path.dirname(to)
  var absTarget = path.resolve(toDir, from)
  var relativeTarget = path.relative(toDir, absTarget)
  var target = abs ? absTarget : relativeTarget

chain(
    [
      [ensureFromIsNotSource, absTarget, to],
      [fs, 'stat', absTarget],
      [rm, to, gently],
      [mkdir, path.dirname(to)],
      [fs, 'symlink', target, to, 'junction']
    ],
    cb
  )
}

[-] git.js [edit]
[-] read-local-package.js [edit]
[-] spawn.js [edit]
[-] error-message.js [edit]
[-] is-windows-shell.js [edit]
[-] get-publish-config.js [edit]
[-] deep-sort-object.js [edit]
[-] parse-json.js [edit]
[-] error-handler.js [edit]
[-] usage.js [edit]
[-] link.js [edit]
[-] map-to-registry.js [edit]
[-] is-windows-bash.js [edit]
[-] pulse-till-done.js [edit]
[-] completion.sh [edit]
[-] package-id.js [edit]
[-] no-progress-while-running.js [edit]
[+] completion
[-] output.js [edit]
[-] warn-deprecated.js [edit]
[-] child-path.js [edit]
[-] escape-arg.js [edit]
[-] depr-check.js [edit]
[-] correct-mkdir.js [edit]
[-] save-stack.js [edit]
[-] gently-rm.js [edit]
[-] tar.js [edit]
[-] is-windows.js [edit]
[-] lifecycle.js [edit]
[+] ..
[-] locker.js [edit]
[-] rename.js [edit]
[-] umask.js [edit]
[-] temp-filename.js [edit]
[-] module-name.js [edit]
[-] escape-exec-path.js [edit]