feat(ud): Deploy to Vercel

[Tobbe]

All the crazy workarounds needed for Vercel

[netlify]

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[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2026-05-29 10:07:08 UTC

[greptile-apps]

Greptile Summary

This PR adds Vercel deployment support for the Universal Deploy (UD) build path, working around several Vite 7 / vite-plugin-vercel integration quirks: output-directory misplacement, provider cleanup hooks wiping prior build artifacts, and environment-build ordering in the builder API.

• buildHandler.ts: after buildCedarApp completes, the .vercel/output tree is relocated from web/.vercel/output to the project root, and web static files are manually copied as a fallback for when vite-plugin-vercel's own generateBundle hook fails to do so.
• buildUDApiServer.ts: a backup/restore mechanism saves .vercel/output before the UD API server build and restores it afterward, preventing provider buildStart cleanup hooks from deleting the Vercel artifacts produced in the previous step.
• buildApp.ts: an explicit pre-order buildApp hook ensures Cedar's client and api environments are built even when a third-party plugin has already marked some environments as built; a new cedar-optional-peer-deps plugin silences UNRESOLVED_IMPORT warnings for optional peer dependencies inside node_modules.
• vite-plugin-cedar-universal-deploy.ts: entry registration is moved out of the SSR-only guard; virtual-module resolution and loading are now gated on a SSR_ENVIRONMENT_NAMES set (ssr, vercel_node, vercel_edge).
• New tasks/vercel-tests/ e2e suite mirrors the Netlify test structure and is wired into CI.

Confidence Score: 5/5

Safe to merge; the workarounds are well-commented and isolated to the UD+Vercel build path, leaving non-Vercel and non-UD builds unaffected.

All changes are additive and guarded by existence checks. The most invasive pieces run in finally blocks and are no-ops when no Vercel plugin is present.

packages/vite/src/buildApp.ts — the cedar-optional-peer-deps plugin deserves a second look to confirm it cannot fire for browser-client builds in real projects.

Important Files Changed

Filename	Overview
.github/workflows/e2e-vercel.yml	New E2E workflow for Vercel deploys; creates projects but has no teardown step, and mixes stderr into the captured deploy output.
packages/cli/src/commands/build/buildHandler.ts	Adds Vercel output directory relocation and static-file copy workaround after buildCedarApp; CEDAR_API_ROOT_PATH is set without a matching cleanup in this finally block.
packages/vite/src/buildApp.ts	Adds an explicit pre-order buildApp hook to ensure client/api environments are built before provider plugins; also adds a global cedar-optional-peer-deps plugin that applies to all environments including the browser client.
packages/vite/src/buildUDApiServer.ts	Adds backup/restore of provider output directories to prevent vite-plugin-vercel from wiping .vercel/output during the UD API server build; restore runs in finally for safety.
packages/vite/src/plugins/vite-plugin-cedar-universal-deploy.ts	Refactors environment filtering to use SSR_ENVIRONMENT_NAMES set and unconditionally registers entries in the config hook so Vercel provider plugins can read them; logic is correct.
tasks/vercel-tests/vercel.test.mts	New e2e tests for Vercel deployment; covers API functions, legacy handlers, and SPA shell; GraphQL test is intentionally skipped; no per-test timeouts set.
tasks/vercel-tests/vitest.config.mts	Minimal Vitest config; no global testTimeout override, leaving default 5 s for all network tests.
tasks/vercel-tests/vitest.setup.mts	Validates VERCEL_DEPLOY_URL and propagates it to DEPLOY_URL before tests run.
tasks/netlify-tests/netlify.test.mts	Adds a 15 s timeout to the legacyHello test to prevent flakiness on slow network responses.
.github/workflows/ci.yml	Wires the new e2e-vercel job into the CI pipeline and adds it to the ci-status-check dependency list.

_{Reviews (8): Last reviewed commit: "Merge branch 'main' into tobbe-feat-ud-v..." | Re-trigger Greptile}