Replace uuid with nanoid (#4987)

* Replace uuid with nanoid

Same functionality in a smaller package:

https://bundlephobia.com/result?p=nanoid@1.2.1
https://bundlephobia.com/result?p=uuid@3.3.2

* Add comment

package.json

@@ -89,6 +89,7 @@
     "loader-utils": "1.1.0",
     "minimist": "1.2.0",
     "mkdirp-then": "1.2.0",
+    "nanoid": "1.2.1",
     "path-to-regexp": "2.1.0",
     "prop-types": "15.6.0",
     "prop-types-exact": "1.1.1",
@@ -103,7 +104,6 @@
     "styled-jsx": "3.0.2",
     "unfetch": "3.0.0",
     "url": "0.11.0",
-    "uuid": "3.1.0",
     "webpack": "4.16.3",
     "webpack-dev-middleware": "3.1.3",
     "webpack-hot-middleware": "2.22.2",

server/config.js

@@ -1,6 +1,5 @@
 // @flow
 import findUp from 'find-up'
-import uuid from 'uuid'
 import {CONFIG_FILE} from '../lib/constants'
 
 type WebpackConfig = *
@@ -28,7 +27,11 @@ const defaultConfig: NextConfig = {
   assetPrefix: '',
   configOrigin: 'default',
   useFileSystemPublicRoutes: true,
-  generateBuildId: () => uuid.v4(),
+  generateBuildId: () => {
+    // nanoid is a small url-safe uuid generator
+    const nanoid = require('nanoid')
+    return nanoid()
+  },
   generateEtags: true,
   pageExtensions: ['jsx', 'js']
 }

yarn.lock

@@ -5312,6 +5312,10 @@ nan@^2.10.0, nan@^2.9.2:
   version "2.10.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
+nanoid@1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-1.2.1.tgz#922bf6c10e35f7b208993768dad643577c907adf"
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -7853,10 +7857,6 @@ utils-merge@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.0.tgz#0294fb922bb9375153541c4f7096231f287c8af8"
 
-uuid@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
-
 uuid@^3.0.0, uuid@^3.1.0, uuid@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"