fix(pages): preserve CJS globals in bundled dependencies

[james-elicx]

Summary

• preserve CommonJS __dirname and __filename semantics when Pages dependencies are converted for the Node dev module runner
• cover both explicitly optimized dependencies and on-demand CommonJS conversion without enabling global dependency discovery
• respect Node package-scope type: module boundaries and avoid App Router, client, Cloudflare, and Nitro paths
• leave production bundling chunk-relative and relocatable, matching a real Next.js webpack Pages build

Regression coverage

• a real Pages route imports a node_modules CommonJS dependency that reads both globals and a sibling asset
• disabling the injectors fails in dev with ReferenceError: __dirname is not defined
• explicit optimizer-include and on-demand paths both pass with dependency discovery still disabled
• a relocated production build must resolve relative to the copied server chunk and reject build-host/node_modules paths

Validation

• focused Pages dev, optimizer, virtual-entry timing, and relocated-production fixture tests
• tests/import-meta-url.test.ts
• tests/build-optimization.test.ts
• touched-file vp check
• independent review: clean after removing a non-relocatable production source-path transform and global optimizer crawl

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@vinext/cloudflare@2826

npm i https://pkg.pr.new/create-vinext-app@2826

npm i https://pkg.pr.new/@vinext/types@2826

npm i https://pkg.pr.new/vinext@2826

commit: cb39205

[github-actions]

Example	Preview	Production	Original
app-router-cloudflare	preview	production
pages-router-cloudflare	preview	production
app-router-playground	preview	production	original
realworld-api-rest	preview	production
nextra-docs-template	preview	production
benchmarks	preview	production
hackernews	preview	production	original
workers-cache	preview	production
web	preview	production

[github-actions]

Performance benchmarks

Compared cb39205 against base 3c5cea4 using alternating same-runner rounds. Next.js was unchanged and skipped.

1 improved · 0 regressed · 5 within ±1.5%

Scenario	Framework	Baseline	Current	Change
Client bundle size (gzip)	vinext	134.6 KB	134.6 KB	⚫ +0.0%
Client entry size (gzip)	vinext	122.1 KB	122.2 KB	⚫ +0.0%
Dev server cold start	vinext	2.93 s	2.88 s	🟢 -1.7%
Production build time	vinext	3.09 s	3.07 s	⚫ -0.5%
RSC entry closure size (gzip)	vinext	113.8 KB	113.9 KB	⚫ +0.0%
Server bundle size (gzip)	vinext	191.4 KB	191.4 KB	⚫ +0.0%

View detailed results and traces

_{🟢 improvement · 🔴 regression · ⚫ change below 1.5% · paired base/head}

[james-elicx]

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