[next] support maxDuration in Next.js deployments (#10069)

Follow up PR to
8703c55f9f
which reads the newly created function config manifest and patches in
the options for resource creation.

---------

Co-authored-by: Steven <steven@ceriously.com>

packages/next/src/utils.ts

@@ -1397,6 +1397,7 @@ const LAMBDA_RESERVED_COMPRESSED_SIZE = 250 * KIB;
 export async function getPageLambdaGroups({
   entryPath,
   config,
+  functionsConfigManifest,
   pages,
   prerenderRoutes,
   pageTraces,
@@ -1410,6 +1411,7 @@ export async function getPageLambdaGroups({
 }: {
   entryPath: string;
   config: Config;
+  functionsConfigManifest?: FunctionsConfigManifestV1;
   pages: string[];
   prerenderRoutes: Set<string>;
   pageTraces: {
@@ -1436,16 +1438,26 @@ export async function getPageLambdaGroups({
 
     let opts: { memory?: number; maxDuration?: number } = {};
 
+    if (
+      functionsConfigManifest &&
+      functionsConfigManifest.functions[routeName]
+    ) {
+      opts = functionsConfigManifest.functions[routeName];
+    }
+
     if (config && config.functions) {
       const sourceFile = await getSourceFilePathFromPage({
         workPath: entryPath,
         page,
         pageExtensions,
       });
-      opts = await getLambdaOptionsFromFunction({
+
+      const vercelConfigOpts = await getLambdaOptionsFromFunction({
         sourceFile,
         config,
       });
+
+      opts = { ...vercelConfigOpts, ...opts };
     }
 
     let matchingGroup = groups.find(group => {
@@ -2388,6 +2400,16 @@ export {
   getSourceFilePathFromPage,
 };
 
+export type FunctionsConfigManifestV1 = {
+  version: 1;
+  functions: Record<
+    string,
+    {
+      maxDuration?: number;
+    }
+  >;
+};
+
 type MiddlewareManifest = MiddlewareManifestV1 | MiddlewareManifestV2;
 
 interface MiddlewareManifestV1 {
@@ -2731,6 +2753,37 @@ export async function getMiddlewareBundle({
   };
 }
 
+/**
+ * Attempts to read the functions config manifest from the pre-defined
+ * location. If the manifest can't be found it will resolve to
+ * undefined.
+ */
+export async function getFunctionsConfigManifest(
+  entryPath: string,
+  outputDirectory: string
+): Promise<FunctionsConfigManifestV1 | undefined> {
+  const functionConfigManifestPath = path.join(
+    entryPath,
+    outputDirectory,
+    './server/functions-config-manifest.json'
+  );
+
+  const hasManifest = await fs
+    .access(functionConfigManifestPath)
+    .then(() => true)
+    .catch(() => false);
+
+  if (!hasManifest) {
+    return;
+  }
+
+  const manifest: FunctionsConfigManifestV1 = await fs.readJSON(
+    functionConfigManifestPath
+  );
+
+  return manifest.version === 1 ? manifest : undefined;
+}
+
 /**
  * Attempts to read the middleware manifest from the pre-defined
  * location. If the manifest can't be found it will resolve to