do not rewrite deprecated GHES links

lib/rewrite-local-links.js

@@ -4,7 +4,7 @@ const externalRedirects = Object.keys(require('./redirects/external-sites'))
 const { getPathWithoutLanguage, getVersionStringFromPath } = require('./path-utils')
 const { getNewVersionedPath } = require('./old-versions-utils')
 const patterns = require('./patterns')
-const { latest } = require('./enterprise-server-releases')
+const { deprecated, latest } = require('./enterprise-server-releases')
 const nonEnterpriseDefaultVersion = require('./non-enterprise-default-version')
 const removeFPTFromPath = require('./remove-fpt-from-path')
 const allVersions = require('./all-versions')
@@ -24,16 +24,13 @@ module.exports = function rewriteLocalLinks ($, version, languageCode) {
 function getNewHref (link, languageCode, version) {
   const href = link.attr('href')
 
-  // these links should not be rewritten
+  // Exceptions to link rewriting
   if (href.startsWith('/assets')) return
   if (href.startsWith('/public')) return
-
-  // Leave old redirected URLs intact
-  // e.g. `/contact` should not be replaced with `/en/contact`
   if (externalRedirects.includes(href)) return
 
-  let newHref
-  // If the link has a hardcoded plan or version in it, do not update the version, just add the language code
+  let newHref = href
+  // If the link has a hardcoded plan or version in it, do not update other than adding a language code
   // Examples:
   // /enterprise-server@2.20/rest/reference/oauth-authorizations
   // /enterprise-server/rest/reference/oauth-authorizations (this redirects to the latest version)
@@ -43,11 +40,16 @@ function getNewHref (link, languageCode, version) {
     newHref = path.join('/', languageCode, href)
   }
 
-  // If link is dotcom-only, just get the language code
-  // Otherwise, get the versioned path with language code
-  if (!newHref) {
+  // If the link includes a deprecated version, do not update other than adding a language code
+  // Example: /enterprise/11.10.340/admin/articles/upgrading-to-the-latest-release
+  const oldEnterpriseVersionNumber = href.match(patterns.getEnterpriseVersionNumber)
+  if (oldEnterpriseVersionNumber && deprecated.includes(oldEnterpriseVersionNumber[1])) {
+    newHref = path.join('/', languageCode, href)
+  }
+
+  if (newHref === href) {
     // start clean with no language (TOC pages already include the lang codes via lib/liquid-tags/link.js)
-    const hrefWithoutLang = getPathWithoutLanguage(href).replace(patterns.trailingSlash, '$1')
+    const hrefWithoutLang = getPathWithoutLanguage(href)
 
     // normalize any legacy links so they conform to new link structure
     newHref = path.join('/', languageCode, getNewVersionedPath(hrefWithoutLang))
@@ -76,5 +78,7 @@ function getNewHref (link, languageCode, version) {
     newHref = removeFPTFromPath(newHref.replace(versionFromHref, version))
   }
 
+  newHref = newHref.replace(patterns.trailingSlash, '$1')
+
   if (href !== newHref) link.attr('href', newHref)
 }