don't need disk caching for site data (#26333)

* reinstate

* start server manually

* routing tests too

* skip more

* sleep more and fail if not 200

* use e2etest for content/ too

* automatically start server for jest

* does this work?

* feedbacked

* rename things

* getting it to work

* add dev dependency

* install the right version

* don't need to start that

* fix package lock

* update readme about it

* feedbacked

* don't need disk caching for site-data

lib/site-data.js

@@ -1,5 +1,3 @@
-import fs from 'fs'
-import os from 'os'
 import path from 'path'
 import flat from 'flat'
 import { get, set } from 'lodash-es'
@@ -7,30 +5,7 @@ import languages from './languages.js'
 import dataDirectory from './data-directory.js'
 import encodeBracketedParentheses from './encode-bracketed-parentheses.js'
 
-const TEMP_DIRECTORY = process.env.RUNNER_TEMP || os.tmpdir()
-
-function diskMemoize(prefix, fn) {
-  const useCache = process.env.NODE_ENV !== 'development'
-  return (dir) => {
-    const cacheFileName = `${prefix}.${dir.replace(/[^\w]+/g, '-').toLowerCase() || 'en'}.json`
-    if (useCache) {
-      try {
-        return JSON.parse(fs.readFileSync(cacheFileName, 'utf-8'))
-      } catch (err) {
-        if (!(err.code === 'ENOENT' || err instanceof SyntaxError)) throw err
-      }
-    }
-
-    const result = fn(dir)
-    if (useCache) {
-      fs.writeFileSync(cacheFileName, JSON.stringify(result), 'utf-8')
-      console.log(`Disk-cache miss on ${cacheFileName}`, new Date())
-    }
-    return result
-  }
-}
-
-const loadSiteDataFromDir = diskMemoize(path.join(TEMP_DIRECTORY, 'docs-site-data'), (dir) => {
+const loadSiteDataFromDir = (dir) => {
   return {
     site: {
       data: dataDirectory(path.join(dir, 'data'), {
@@ -39,7 +14,7 @@ const loadSiteDataFromDir = diskMemoize(path.join(TEMP_DIRECTORY, 'docs-site-dat
       }),
     },
   }
-})
+}
 
 export default function loadSiteData() {
   // load English site data