Remove fs-extra dependency

server/libs/fsExtra/ensure/link.js

@@ -0,0 +1,64 @@
+'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
+}