support hardcoded versions in frontmatter redirects

Author: sarahs

lib/redirects/permalinks.js

@@ -1,5 +1,6 @@
 const patterns = require('../patterns')
-const { getVersionedPathWithLanguage } = require('../path-utils')
+const { getVersionedPathWithLanguage, getVersionStringFromPath } = require('../path-utils')
+const allVersions = Object.keys(require('../all-versions'))
 const getOldPathsFromPermalink = require('./get-old-paths-from-permalink')
 
 module.exports = function generateRedirectsForPermalinks (permalinks, redirectFrontmatter) {
@@ -25,6 +26,12 @@ module.exports = function generateRedirectsForPermalinks (permalinks, redirectFr
       // remove trailing slashes (sometimes present in frontmatter)
       frontmatterOldPath = frontmatterOldPath.replace(patterns.trailingSlash, '$1')
 
+      // support hardcoded versions in redirect frontmatter
+      if (allVersions.includes(getVersionStringFromPath(frontmatterOldPath))) {
+        redirects[frontmatterOldPath] = permalink.href
+        redirects[`/en${frontmatterOldPath}`] = permalink.href
+      }
+
       // get the old path for the current permalink version
       const versionedFrontmatterOldPath = getVersionedPathWithLanguage(frontmatterOldPath, permalink.pageVersion, permalink.languageCode)