Fix: generateSitemaps in production giving 404

[abhinaypandey02]

What?

generateSitemaps function returns a 404 for /sitemap/[id].xml in production

Why?

While finding the correct sitemap partition from the array, we check the param against the id. Which works in dev because id and param are both without trailing .xml. But it fails in production as param has a trailing .xml (/sitemap/[id] works in production because it falls back to dynamic loading and param and id are both without .xml)

How?

If we are in production environment, check the id with a trailing .xml because that's whats returned from generateStaticParams, an array of metadata_id with trailing .xml

Fixes #61969

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
buildDuration	13.9s	14.3s	⚠️ +424ms
buildDurationCached	7.4s	7.8s	⚠️ +330ms
nodeModulesSize	197 MB	197 MB	N/A
nextStartRea..uration (ms)	407ms	406ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
2453-HASH.js gzip	30.5 kB	30.3 kB	N/A
3304.HASH.js gzip	181 B	181 B	✓
3f784ff6-HASH.js gzip	53.7 kB	53.5 kB	N/A
8299-HASH.js gzip	5.04 kB	5.03 kB	N/A
framework-HASH.js gzip	45.2 kB	45.2 kB	✓
main-app-HASH.js gzip	242 B	242 B	✓
main-HASH.js gzip	32.1 kB	32.1 kB	N/A
webpack-HASH.js gzip	1.7 kB	1.7 kB	N/A
Overall change	45.6 kB	45.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
_app-HASH.js gzip	196 B	196 B	✓
_error-HASH.js gzip	184 B	183 B	N/A
amp-HASH.js gzip	505 B	504 B	N/A
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.5 kB	2.51 kB	N/A
edge-ssr-HASH.js gzip	258 B	259 B	N/A
head-HASH.js gzip	352 B	351 B	N/A
hooks-HASH.js gzip	370 B	370 B	✓
image-HASH.js gzip	4.2 kB	4.2 kB	N/A
index-HASH.js gzip	259 B	259 B	✓
link-HASH.js gzip	2.67 kB	2.67 kB	N/A
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	386 B	385 B	N/A
withRouter-HASH.js gzip	309 B	311 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	1.57 kB	1.57 kB	✓

Client Build Manifests

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
_buildManifest.js gzip	483 B	484 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
index.html gzip	529 B	528 B	N/A
link.html gzip	542 B	540 B	N/A
withRouter.html gzip	525 B	522 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
edge-ssr.js gzip	95.1 kB	2.29 kB	N/A
page.js gzip	3.06 kB	2.98 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
middleware-b..fest.js gzip	624 B	626 B	N/A
middleware-r..fest.js gzip	151 B	151 B	✓
middleware.js gzip	25.5 kB	465 B	N/A
edge-runtime..pack.js gzip	839 B	839 B	✓
Overall change	990 B	990 B	✓

Next Runtimes Overall increase ⚠️

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
app-page-exp...dev.js gzip	171 kB	166 kB	N/A
app-page-exp..prod.js gzip	96.7 kB	95.9 kB	N/A
app-page-tur..prod.js gzip	98.5 kB	97.6 kB	N/A
app-page-tur..prod.js gzip	92.9 kB	92 kB	N/A
app-page.run...dev.js gzip	150 kB	136 kB	N/A
app-page.run..prod.js gzip	91.4 kB	90.6 kB	N/A
app-route-ex...dev.js gzip	21.3 kB	22 kB	⚠️ +757 B
app-route-ex..prod.js gzip	15 kB	14.9 kB	N/A
app-route-tu..prod.js gzip	15 kB	14.9 kB	N/A
app-route-tu..prod.js gzip	14.8 kB	14.6 kB	N/A
app-route.ru...dev.js gzip	20.9 kB	21.7 kB	⚠️ +796 B
app-route.ru..prod.js gzip	14.8 kB	14.6 kB	N/A
pages-api-tu..prod.js gzip	9.51 kB	9.47 kB	N/A
pages-api.ru...dev.js gzip	9.79 kB	9.74 kB	N/A
pages-api.ru..prod.js gzip	9.51 kB	9.47 kB	N/A
pages-turbo...prod.js gzip	22.3 kB	22.1 kB	N/A
pages.runtim...dev.js gzip	23 kB	22.7 kB	N/A
pages.runtim..prod.js gzip	22.3 kB	22.1 kB	N/A
server.runti..prod.js gzip	50.6 kB	50.1 kB	N/A
Overall change	42.2 kB	43.8 kB	⚠️ +1.55 kB

build cache Overall increase ⚠️

	vercel/next.js canary	abhinaypandey02/next.js abhinay	Change
0.pack gzip	1.56 MB	1.49 MB	N/A
index.pack gzip	104 kB	104 kB	⚠️ +110 B
Overall change	104 kB	104 kB	⚠️ +110 B

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Commit: ca4b6b9

[huozhi]

Add a test, looks good!