fix PPR build output logs (vercel#58149)

Fixes two build output logs:

- A page that uses `generateStaticParams` & postpones should be marked as partially prerendered
- Assume pages that contain dynamic segments will postpone when PPR is enabled even though it won't be determined until request time

Author: ztanner

packages/next/src/build/index.ts

@@ -2301,6 +2301,13 @@ export default async function build(
                 hasEmptyPrelude,
               })
 
+              // update the page (eg /blog/[slug]) to also have the postpone metadata
+              pageInfos.set(page, {
+                ...(pageInfos.get(page) as PageInfo),
+                hasPostponed,
+                hasEmptyPrelude,
+              })
+
               if (revalidate !== 0) {
                 const normalizedRoute = normalizePagePath(route)
 
@@ -2386,6 +2393,9 @@ export default async function build(
               pageInfos.set(page, {
                 ...(pageInfos.get(page) as PageInfo),
                 isDynamicAppRoute: true,
+                // if PPR is turned on and the route contains a dynamic segment,
+                // we assume it'll be partially prerendered
+                hasPostponed: experimentalPPR,
               })
 
               // TODO: create a separate manifest to allow enforcing

packages/next/src/build/utils.ts

@@ -459,8 +459,13 @@ export async function printTreeView(
       } else if (isEdgeRuntime(pageInfo?.runtime)) {
         symbol = 'ℇ'
       } else if (pageInfo?.isPPR) {
-        // If the page has an empty prelude, then it's equivalent to a static page.
-        if (pageInfo?.hasEmptyPrelude || pageInfo.isDynamicAppRoute) {
+        if (
+          // If the page has an empty prelude, then it's equivalent to a dynamic page
+          pageInfo?.hasEmptyPrelude ||
+          // ensure we don't mark dynamic paths that postponed as being dynamic
+          // since in this case we're able to partially prerender it
+          (pageInfo.isDynamicAppRoute && !pageInfo.hasPostponed)
+        ) {
           symbol = 'λ'
         } else if (!pageInfo?.hasPostponed) {
           symbol = '○'

test/e2e/app-dir/ppr/ppr.test.ts

@@ -6,7 +6,17 @@ createNextDescribe(
     files: __dirname,
     skipDeployment: true,
   },
-  ({ next, isNextDev }) => {
+  ({ next, isNextDev, isNextStart }) => {
+    if (isNextStart) {
+      describe('build output', () => {
+        it('correctly marks pages as being partially prerendered in the build output', () => {
+          expect(next.cliOutput).toContain('◐ /loading/nested/[slug]')
+          expect(next.cliOutput).toContain('◐ /suspense/node')
+          expect(next.cliOutput).toContain('◐ /suspense/node/gsp/[slug]')
+          expect(next.cliOutput).toContain('◐ /suspense/node/nested/[slug]')
+        })
+      })
+    }
     describe.each([
       { pathname: '/suspense/node' },
       { pathname: '/suspense/node/nested/1' },