fix: use static server for node server.js (#1041)

* fix: use static server for `node server.js`

Aligns the Node server with the Zeit server. Fixes #1019

* fix test

package.json

@@ -10,7 +10,7 @@
     "sapper-dev": "cross-env NODE_ENV=development PORT=4002 sapper dev",
     "before-build": "run-s build-template-html build-third-party-assets",
     "build": "cross-env NODE_ENV=production run-s build-steps",
-    "build-steps": "run-s before-build sapper-build",
+    "build-steps": "run-s before-build sapper-export build-now-json",
     "sapper-build": "sapper build",
     "start": "node server.js",
     "build-and-start": "run-s build start",
@@ -35,7 +35,7 @@
     "deploy-dev": "DEPLOY_TYPE=dev ./bin/deploy.sh",
     "deploy-all-travis": "./bin/deploy-all-travis.sh",
     "backup-mastodon-data": "./bin/backup-mastodon-data.sh",
-    "sapper-export": "sapper export",
+    "sapper-export": "cross-env PORT=4002 sapper export",
     "print-export-info": "node ./bin/print-export-info.js",
     "export-steps": "run-s before-build sapper-export print-export-info",
     "export": "cross-env NODE_ENV=production run-s export-steps",
@@ -65,7 +65,6 @@
     "file-drop-element": "0.2.0",
     "form-data": "^2.3.3",
     "glob": "^7.1.3",
-    "helmet": "^3.15.1",
     "idb-keyval": "^3.1.0",
     "indexeddb-getall-shim": "^1.3.5",
     "inferno-compat": "^7.1.7",
@@ -89,7 +88,6 @@
     "rollup-plugin-replace": "^2.1.0",
     "rollup-plugin-terser": "^4.0.4",
     "sapper": "nolanlawson/sapper#for-pinafore-10",
-    "serve-static": "^1.13.2",
     "stringz": "^1.0.0",
     "svelte": "^2.16.1",
     "svelte-extras": "^2.0.2",

server.js

@@ -1,5 +1,42 @@
 #!/usr/bin/env node
 
-process.env.PORT = process.env.PORT || 4002
+const path = require('path')
+const express = require('express')
+const compression = require('compression')
+const { routes: nowRoutes } = require('./now.json')
 
-require('./__sapper__/build')
+const { PORT = 4002 } = process.env
+const app = express()
+const exportDir = path.resolve(__dirname, '__sapper__/export')
+
+const routes = nowRoutes.map(({ src, headers, dest }) => ({
+  regex: new RegExp(src),
+  headers,
+  dest
+}))
+
+app.use(compression({ threshold: 0 }))
+
+app.use(express.static(exportDir, {
+  setHeaders (res, thisPath) {
+    let localPath = '/' + path.relative(exportDir, thisPath)
+    for (let { regex, headers } of routes) {
+      if (regex.test(localPath)) {
+        res.set(headers)
+        return
+      }
+    }
+  }
+}))
+
+routes.forEach(({ regex, headers, dest }) => {
+  app.get(regex, (req, res) => {
+    res.set(headers)
+    res.sendFile(path.resolve(exportDir, dest ? req.path.replace(regex, dest) : req.path))
+  })
+})
+
+app.listen(PORT, () => console.log(`listening on port ${PORT}`))
+
+// Handle SIGINT (source: https://git.io/vhJgF)
+process.on('SIGINT', () => process.exit(0))

src/server.js

@@ -1,89 +1,15 @@
+// This is the Sapper server, which we only run during `sapper export`.
+
 import * as sapper from '../__sapper__/server.js'
 import express from 'express'
-import compression from 'compression'
-import serveStatic from 'serve-static'
-import helmet from 'helmet'
-import fetch from 'node-fetch'
-import inlineScriptChecksum from './inline-script/checksum'
-import { sapperInlineScriptChecksums } from './server/sapperInlineScriptChecksums'
 
 const { PORT = 4002 } = process.env
 const app = express()
 
-const MAX_AGE = 3600
+app.use(express.static('static'))
+app.use(sapper.middleware())
 
-// this allows us to do e.g. `fetch('/_api/blog')` on the server
+app.listen(PORT, () => console.log(`listening on port ${PORT}`))
-global.fetch = (url, opts) => {
-  if (url[0] === '/') {
-    url = `http://localhost:${PORT}${url}`
-  }
-  return fetch(url, opts)
-}
-
-app.use(compression({ threshold: 0 }))
-
-// CSP only needs to apply to core HTML files, not debug files
-// like report.html or the JS/CSS/JSON/image files
-const coreHtmlFilesOnly = (fn) => (req, res, next) => {
-  let coreHtml = !/\.(js|css|json|png|svg|jpe?g|map)$/.test(req.path) &&
-    !(/\/report.html/.test(req.path))
-  return coreHtml ? fn(req, res, next) : next()
-}
-
-app.use(coreHtmlFilesOnly(helmet({
-  contentSecurityPolicy: {
-    directives: {
-      scriptSrc: [
-        `'self'`,
-        `'sha256-${inlineScriptChecksum}'`,
-        ...sapperInlineScriptChecksums.map(_ => `'sha256-${_}'`)
-      ],
-      workerSrc: [`'self'`],
-      styleSrc: [`'self'`, `'unsafe-inline'`],
-      frameSrc: [`'none'`],
-      objectSrc: [`'none'`],
-      manifestSrc: [`'self'`]
-    }
-  },
-  referrerPolicy: {
-    policy: 'no-referrer'
-  }
-})))
-
-app.use(serveStatic('static', {
-  setHeaders: (res) => {
-    res.setHeader('Cache-Control', `public,max-age=${MAX_AGE}`)
-  }
-}))
-
-app.use(express.static('__sapper__/build/client/report.html'))
-app.use(express.static('__sapper__/build/client/stats.json'))
-
-// TODO: hack to override Sapper's default cache-control
-function overrideSetHeader (req, res, next) {
-  const origSetHeader = res.setHeader
-  res.setHeader = function (key, value) {
-    if (key === 'Cache-Control') {
-      if (value === 'max-age=31536000, immutable') { // webpack assets
-        return origSetHeader.apply(this, ['Cache-Control', 'public,max-age=31536000,immutable'])
-      }
-      if (value === 'max-age=600') { // HTML files
-        return origSetHeader.apply(this, ['Cache-Control', `public,max-age=${MAX_AGE}`])
-      }
-    }
-
-    return origSetHeader.apply(this, arguments)
-  }
-  return next()
-}
-
-app.use(overrideSetHeader, sapper.middleware())
-
-app.listen(PORT, () => {
-  console.log(`listening on port ${PORT}`)
-})
 
 // Handle SIGINT (source: https://git.io/vhJgF)
-process.on('SIGINT', function () {
+process.on('SIGINT', () => process.exit(0))
-  process.exit(0)
-})

tests/spec/010-focus.js

@@ -68,7 +68,7 @@ test('notification timeline preserves focus', async t => {
   await t.click($(`${getNthStatusSelector(5)} .status-header a`))
     .expect(getUrl()).contains('/accounts/')
     .click(goBackButton)
-    .expect(getUrl()).eql('http://localhost:4002/notifications')
+    .expect(getUrl()).contains('/notifications')
     .expect(getNthStatus(0).exists).ok()
     .expect(getActiveElementInnerText()).eql('quux')
     .expect(getActiveElementInsideNthStatus()).eql('5')

yarn.lock

@@ -1591,11 +1591,6 @@ camelcase@^5.0.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.0.0.tgz#03295527d58bd3cd4aa75363f35b2e8d97be2f42"
   integrity sha512-faqwZqnWxbxn+F1d399ygeamQNy3lPp/H9H6rNrqYh4FSVCtcY+3cub1MxA8o9mDd55mM8Aghuu/kuyYA6VTsA==
 
-camelize@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/camelize/-/camelize-1.0.0.tgz#164a5483e630fa4321e5af07020e531831b2609b"
-  integrity sha1-FkpUg+Yw+kMh5a8HAg5TGDGyYJs=
-
 caniuse-lite@^1.0.30000844:
   version "1.0.30000932"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000932.tgz#d01763e9ce77810962ca7391ff827b5949ce4272"
@@ -1965,11 +1960,6 @@ content-disposition@0.5.2:
   resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
   integrity sha1-DPaLud318r55YcOoUXjLhdunjLQ=
 
-content-security-policy-builder@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/content-security-policy-builder/-/content-security-policy-builder-2.0.0.tgz#8749a1d542fcbe82237281ea9f716ce68b394dd2"
-  integrity sha512-j+Nhmj1yfZAikJLImCvPJFE29x/UuBi+/MWqggGGc515JKaZrjuei2RhULJmy0MsstW3E3htl002bwmBNMKr7w==
-
 content-type@~1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
@@ -2255,11 +2245,6 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-dasherize@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/dasherize/-/dasherize-2.0.0.tgz#6d809c9cd0cf7bb8952d80fc84fa13d47ddb1308"
-  integrity sha1-bYCcnNDPe7iVLYD8hPoT1H3bEwg=
-
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
@@ -2391,11 +2376,6 @@ delegates@^1.0.0:
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
   integrity sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=
 
-depd@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/depd/-/depd-2.0.0.tgz#b696163cc757560d09cf22cc8fad1571b79e76df"
-  integrity sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==
-
 depd@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
@@ -2445,11 +2425,6 @@ diffie-hellman@^5.0.0:
     miller-rabin "^4.0.0"
     randombytes "^2.0.0"
 
-dns-prefetch-control@0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/dns-prefetch-control/-/dns-prefetch-control-0.1.0.tgz#60ddb457774e178f1f9415f0cabb0e85b0b300b2"
-  integrity sha1-YN20V3dOF48flBXwyrsOhbCzALI=
-
 doctrine@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"
@@ -2511,11 +2486,6 @@ domutils@^1.5.1, domutils@^1.7.0:
     dom-serializer "0"
     domelementtype "1"
 
-dont-sniff-mimetype@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/dont-sniff-mimetype/-/dont-sniff-mimetype-1.0.0.tgz#5932890dc9f4e2f19e5eb02a20026e5e5efc8f58"
-  integrity sha1-WTKJDcn04vGeXrAqIAJuXl78j1g=
-
 duplexer@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
@@ -2961,11 +2931,6 @@ expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   dependencies:
     homedir-polyfill "^1.0.1"
 
-expect-ct@0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/expect-ct/-/expect-ct-0.1.1.tgz#de84476a2dbcb85000d5903737e9bc8a5ba7b897"
-  integrity sha512-ngXzTfoRGG7fYens3/RMb6yYoVLvLMfmsSllP/mZPxNHgFq41TmPSLF/nLY7fwoclI2vElvAmILFWGUYqdjfCg==
-
 express@^4.16.3, express@^4.16.4:
   version "4.16.4"
   resolved "https://registry.yarnpkg.com/express/-/express-4.16.4.tgz#fddef61926109e24c515ea97fd2f1bdbf62df12e"
@@ -3089,11 +3054,6 @@ fastparse@^1.1.1:
   resolved "https://registry.yarnpkg.com/fastparse/-/fastparse-1.1.2.tgz#91728c5a5942eced8531283c79441ee4122c35a9"
   integrity sha512-483XLLxTVIwWK3QTrMGRqUfUpoOs/0hbQrl2oz4J0pAcm3A3bu84wxTFqGqkJzewCLdME38xJLJAxBABfQT8sQ==
 
-feature-policy@0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/feature-policy/-/feature-policy-0.2.0.tgz#22096de49ab240176878ffe2bde2f6ff04d48c43"
-  integrity sha512-2hGrlv6efG4hscYVZeaYjpzpT6I2OZgYqE2yDUzeAcKj2D1SH0AsEzqJNXzdoglEddcIXQQYop3lD97XpG75Jw==
-
 figgy-pudding@^3.5.1:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.1.tgz#862470112901c727a0e495a80744bd5baa1d6790"
@@ -3313,11 +3273,6 @@ fragment-cache@^0.2.1:
   dependencies:
     map-cache "^0.2.2"
 
-frameguard@3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/frameguard/-/frameguard-3.0.0.tgz#7bcad469ee7b96e91d12ceb3959c78235a9272e9"
-  integrity sha1-e8rUae57lukdEs6zlZx4I1qScuk=
-
 fresh@0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
@@ -3695,47 +3650,6 @@ he@1.2.0, he@1.2.x:
   resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
   integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==
 
-helmet-crossdomain@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/helmet-crossdomain/-/helmet-crossdomain-0.3.0.tgz#707e2df930f13ad61f76ed08e1bb51ab2b2e85fa"
-  integrity sha512-YiXhj0E35nC4Na5EPE4mTfoXMf9JTGpN4OtB4aLqShKuH9d2HNaJX5MQoglO6STVka0uMsHyG5lCut5Kzsy7Lg==
-
-helmet-csp@2.7.1:
-  version "2.7.1"
-  resolved "https://registry.yarnpkg.com/helmet-csp/-/helmet-csp-2.7.1.tgz#e8e0b5186ffd4db625cfcce523758adbfadb9dca"
-  integrity sha512-sCHwywg4daQ2mY0YYwXSZRsgcCeerUwxMwNixGA7aMLkVmPTYBl7gJoZDHOZyXkqPrtuDT3s2B1A+RLI7WxSdQ==
-  dependencies:
-    camelize "1.0.0"
-    content-security-policy-builder "2.0.0"
-    dasherize "2.0.0"
-    platform "1.3.5"
-
-helmet@^3.15.1:
-  version "3.15.1"
-  resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.15.1.tgz#2c80d1a59138b6f23929605afca4b1c88b3298ec"
-  integrity sha512-hgoNe/sjKlKNvJ3g9Gz149H14BjMMWOCmW/DTXl7IfyKGtIK37GePwZrHNfr4aPXdKVyXcTj26RgRFbPKDy9lw==
-  dependencies:
-    depd "2.0.0"
-    dns-prefetch-control "0.1.0"
-    dont-sniff-mimetype "1.0.0"
-    expect-ct "0.1.1"
-    feature-policy "0.2.0"
-    frameguard "3.0.0"
-    helmet-crossdomain "0.3.0"
-    helmet-csp "2.7.1"
-    hide-powered-by "1.0.0"
-    hpkp "2.0.0"
-    hsts "2.1.0"
-    ienoopen "1.0.0"
-    nocache "2.0.0"
-    referrer-policy "1.1.0"
-    x-xss-protection "1.1.0"
-
-hide-powered-by@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/hide-powered-by/-/hide-powered-by-1.0.0.tgz#4a85ad65881f62857fc70af7174a1184dccce32b"
-  integrity sha1-SoWtZYgfYoV/xwr3F0oRhNzM4ys=
-
 highlight-es@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/highlight-es/-/highlight-es-1.0.3.tgz#12abc300a27e686f6f18010134e3a5c6d2fe6930"
@@ -3779,16 +3693,6 @@ hosted-git-info@^2.1.4:
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.7.1.tgz#97f236977bd6e125408930ff6de3eec6281ec047"
   integrity sha512-7T/BxH19zbcCTa8XkMlbK5lTo1WtgkFi3GvdWEyNuc4Vex7/9Dqbnpsf4JMydcfj9HCg4zUWFTL3Za6lapg5/w==
 
-hpkp@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/hpkp/-/hpkp-2.0.0.tgz#10e142264e76215a5d30c44ec43de64dee6d1672"
-  integrity sha1-EOFCJk52IVpdMMROxD3mTe5tFnI=
-
-hsts@2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/hsts/-/hsts-2.1.0.tgz#cbd6c918a2385fee1dd5680bfb2b3a194c0121cc"
-  integrity sha512-zXhh/DqgrTXJ7erTN6Fh5k/xjMhDGXCqdYN3wvxUvGUQvnxcFfUd8E+6vLg/nk3ss1TYMb+DhRl25fYABioTvA==
-
 html-minifier@^3.5.20:
   version "3.5.21"
   resolved "https://registry.yarnpkg.com/html-minifier/-/html-minifier-3.5.21.tgz#d0040e054730e354db008463593194015212d20c"
@@ -3884,11 +3788,6 @@ ieee754@^1.1.4:
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.12.tgz#50bf24e5b9c8bb98af4964c941cdb0918da7b60b"
   integrity sha512-GguP+DRY+pJ3soyIiGPTvdiVXjZ+DbXOxGpXn3eMvNW4x4irjqXm4wHKscC+TfxSJ0yw/S1F24tqdMNsMZTiLA==
 
-ienoopen@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/ienoopen/-/ienoopen-1.0.0.tgz#346a428f474aac8f50cf3784ea2d0f16f62bda6b"
-  integrity sha1-NGpCj0dKrI9QzzeE6i0PFvYr2ms=
-
 iferr@^0.1.5:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/iferr/-/iferr-0.1.5.tgz#c60eed69e6d8fdb6b3104a1fcbca1c192dc5b501"
@@ -5167,11 +5066,6 @@ no-case@^2.2.0:
   dependencies:
     lower-case "^1.1.1"
 
-nocache@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/nocache/-/nocache-2.0.0.tgz#202b48021a0c4cbde2df80de15a17443c8b43980"
-  integrity sha1-ICtIAhoMTL3i34DeFaF0Q8i0OYA=
-
 node-environment-flags@1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/node-environment-flags/-/node-environment-flags-1.0.4.tgz#0b784a6551426bfc16d3b2208424dcbc2b2ff038"
@@ -5910,11 +5804,6 @@ pkg-dir@^3.0.0:
   dependencies:
     find-up "^3.0.0"
 
-platform@1.3.5:
-  version "1.3.5"
-  resolved "https://registry.yarnpkg.com/platform/-/platform-1.3.5.tgz#fb6958c696e07e2918d2eeda0f0bc9448d733444"
-  integrity sha512-TuvHS8AOIZNAlE77WUDiR4rySV/VMptyMfcfeoMgs4P8apaZM3JrnbzBiixKUv+XR6i+BXrQh8WAnjaSPFO65Q==
-
 plugin-error@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/plugin-error/-/plugin-error-0.1.2.tgz#3b9bb3335ccf00f425e07437e19276967da47ace"
@@ -6311,11 +6200,6 @@ redent@^1.0.0:
     indent-string "^2.1.0"
     strip-indent "^1.0.1"
 
-referrer-policy@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/referrer-policy/-/referrer-policy-1.1.0.tgz#35774eb735bf50fb6c078e83334b472350207d79"
-  integrity sha1-NXdOtzW/UPtsB46DM0tHI1AgfXk=
-
 regenerate@^1.2.1:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.0.tgz#4a856ec4b56e4077c557589cae85e7a4c8869a11"
@@ -6732,7 +6616,7 @@ serialize-javascript@^1.4.0, serialize-javascript@^1.6.1:
   resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.6.1.tgz#4d1f697ec49429a847ca6f442a2a755126c4d879"
   integrity sha512-A5MOagrPFga4YaKQSWHryl7AXvbQkEqpw4NNYMTNYUNV51bA8ABHgYFpqKx+YFFrw59xMV1qGH1R4AgoNIVgCw==
 
-serve-static@1.13.2, serve-static@^1.13.2:
+serve-static@1.13.2:
   version "1.13.2"
   resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.13.2.tgz#095e8472fd5b46237db50ce486a43f4b86c6cec1"
   integrity sha512-p/tdJrO4U387R9oMjb1oj7qSMaMfmOyd4j9hOFoxZe2baQszgHcSWjuya/CiT5kgZZKRudHNOA0pYXOl8rQ5nw==
@@ -8087,11 +7971,6 @@ ws@^6.0.0:
   dependencies:
     async-limiter "~1.0.0"
 
-x-xss-protection@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/x-xss-protection/-/x-xss-protection-1.1.0.tgz#4f1898c332deb1e7f2be1280efb3e2c53d69c1a7"
-  integrity sha512-rx3GzJlgEeZ08MIcDsU2vY2B1QEriUKJTSiNHHUIem6eg9pzVOr2TL3Y4Pd6TMAM5D5azGjcxqI62piITBDHVg==
-
 xtend@^4.0.0, xtend@^4.0.1, xtend@~4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"