fix(next-core): carry over original segment config to metadata route

[kwonoj]

What

Fixes to honor metadata route's segment config - turbopack replaces it into route handler, then parsed segment config so original segment config was ignored always.

Closes PACK-2762

[ijjk]

Failing test suites

Commit: 8848be6

TURBOPACK=1 pnpm test test/integration/create-next-app/package-manager.test.ts (turbopack)

• should use Yarn as the package manager on supplying --use-yarn

• should infer yarn as the package manager

Expand output

● should use Yarn as the package manager on supplying --use-yarn

expect(received).toBe(expected) // Object.is equality

Expected: true
Received: false

  80 |   for (const file of files) {
  81 |     try {
> 82 |       expect(existsSync(resolve(projectRoot, file))).toBe(true)
     |                                                      ^
  83 |     } catch (err) {
  84 |       require('console').error(
  85 |         `missing expected file ${file}`,

  at toBe (integration/create-next-app/lib/utils.ts:82:54)
  at integration/create-next-app/package-manager.test.ts:124:28
  at useTempDir (lib/use-temp-dir.ts:24:5)
  at Object.<anonymous> (integration/create-next-app/package-manager.test.ts:104:3)

● should infer yarn as the package manager

expect(received).toBe(expected) // Object.is equality

Expected: true
Received: false

  80 |   for (const file of files) {
  81 |     try {
> 82 |       expect(existsSync(resolve(projectRoot, file))).toBe(true)
     |                                                      ^
  83 |     } catch (err) {
  84 |       require('console').error(
  85 |         `missing expected file ${file}`,

  at toBe (integration/create-next-app/lib/utils.ts:82:54)
  at integration/create-next-app/package-manager.test.ts:438:28
  at useTempDir (lib/use-temp-dir.ts:24:5)
  at Object.<anonymous> (integration/create-next-app/package-manager.test.ts:410:3)

Read more about building and testing Next.js in contributing.md.

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js fix-metadata-route-handler-segment-config	Change
buildDuration	13.9s	14s	N/A
buildDurationCached	7.6s	6.2s	N/A
nodeModulesSize	198 MB	198 MB	✓
nextStartRea..uration (ms)	438ms	435ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js fix-metadata-route-handler-segment-config	Change
2453-HASH.js gzip	30.5 kB	30.5 kB	N/A
3304.HASH.js gzip	181 B	181 B	✓
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	vercel/next.js canary	vercel/next.js fix-metadata-route-handler-segment-config	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
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Client Build Manifests

	vercel/next.js canary	vercel/next.js fix-metadata-route-handler-segment-config	Change
_buildManifest.js gzip	481 B	484 B	N/A
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Rendered Page Sizes

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index.html gzip	528 B	529 B	N/A
link.html gzip	541 B	542 B	N/A
withRouter.html gzip	523 B	523 B	✓
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Edge SSR bundle Size

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Middleware size

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middleware.js gzip	25.5 kB	25.5 kB	N/A
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Next Runtimes

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app-page-exp...dev.js gzip	171 kB	171 kB	✓
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pages.runtim..prod.js gzip	22.3 kB	22.3 kB	✓
server.runti..prod.js gzip	50.6 kB	50.6 kB	✓
Overall change	948 kB	948 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js fix-metadata-route-handler-segment-config	Change
0.pack gzip	1.56 MB	1.56 MB	N/A
index.pack gzip	105 kB	105 kB	⚠️ +255 B
Overall change	105 kB	105 kB	⚠️ +255 B

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Commit: 8848be6