Issue 14989 - Redirect any "v.XX" not including docs to "latest" using a netlify edge function

.gitignore

@@ -38,3 +38,6 @@ go/**
 
 # archived site version
 archived_version
+
+# Local Netlify folder
+.netlify

netlify.toml

@@ -14,3 +14,7 @@
   [headers.values]
     X-Frame-Options = "SAMEORIGIN"
     X-XSS-Protection = "1; mode=block"
+
+[[edge_functions]]
+  path = "/v*"
+  function = "redirect-to-latest"

netlify/edge-functions/redirect-to-latest.ts

@@ -0,0 +1,41 @@
+export default async (request: Request, context) => {
+  const url = new URL(request.url);
+  let pathname = url.pathname;
+  // Normalize pathname by removing consecutive slashes
+  pathname = pathname.replace(/\/\/+/g, '/');
+  // Match version paths like /vX.XX/
+  const versionMatch = pathname.match(/^\/v\d+\.\d+/);
+
+  if (versionMatch) {
+    // Define the main section paths that should be redirected
+    const redirectableSections = ['/', '/about', '/blog', '/get-involved', '/news', '/search'];
+    const versionPath = versionMatch[0]; // ex /v1.15
+    const remainder = pathname.slice(versionPath.length) || '/';
+    // Check if the remainder starts with an optional leading slash followed by a language code
+    const languageCodeMatch = remainder.match(/^\/?([a-z]{2})(\/|$)/);
+    let languageCode: string | null = null;
+    let remainingPathAfterLang = remainder;
+
+    if (languageCodeMatch) {
+      languageCode = languageCodeMatch[1];
+      remainingPathAfterLang = remainder.slice(languageCodeMatch[0].length);
+    }
+    // If there's a language code and no further path, redirect to the homepage with the language code
+    if (languageCode && remainingPathAfterLang === '') {
+      return Response.redirect(new URL(`/latest/${languageCode}/`, url.origin), 301);
+    }
+    // Check if the remaining path (after version and optional language code) starts with a redirectable section
+    const shouldRedirect = redirectableSections.some(section =>
+      remainingPathAfterLang === section || remainingPathAfterLang.startsWith(`${section}/`) || (section === '/' && remainingPathAfterLang === ''));
+
+    if (shouldRedirect) {
+      const cleanRemainderPath = remainingPathAfterLang.startsWith('/') ? remainingPathAfterLang.substring(1) : remainingPathAfterLang;
+      const newPath = `/latest/${languageCode ? `${languageCode}/` : ''}${cleanRemainderPath}`;
+      return Response.redirect(new URL(newPath, url.origin), 301);
+    }
+    // For version-specific paths we want to keep, tell Netlify to stop processing this function
+    return context.next();
+  }
+  // For all non-version paths, pass through
+  return context.next();
+};