feat(cli): setup neon

[Tobbe]

Add setup command for using a new Neon Postgres database

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☁️ Nx Cloud last updated this comment at 2026-05-13 07:54:08 UTC

[greptile-apps]

Greptile Summary

This PR adds a cedar setup neon command that provisions a new Neon Postgres database, migrates SQLite→PostgreSQL, updates db.ts and prisma.config for the Neon driver adapter, writes the connection URLs to .env, and runs the first Prisma migration — all in a single Listr workflow.

• neonHandler.ts: Full task pipeline with proper skip guards (unsupportedProvider, skipWithNote, databaseUrl presence), pooler-string validation, regex matching both quote styles in prisma.config, and explicit DIRECT_DATABASE_URL injection for the migration subprocess.
• setup.ts: Registers the new subcommand in the parent setup builder.
• docs/…/cedarjs-project-overview.md: Adds neon to the CLI tree and converts a few ← arrows to <- in the scaffold section (api lines only; web lines still use ←).

Confidence Score: 5/5

Safe to merge — all the significant correctness issues from earlier review rounds are addressed in this revision.

The task pipeline correctly guards every skip branch, validates the pooler connection string before deriving the direct URL, uses a dual-quote regex to patch prisma.config, protects against unsupported providers, and passes DIRECT_DATABASE_URL explicitly to the migration subprocess. No logic gaps that would produce wrong state or silent failures were found.

No files require special attention; the two suggestions are minor naming and formatting nits.

Important Files Changed

Filename	Overview
packages/cli/src/commands/setup/neon/neonHandler.ts	Core handler for Neon setup: provisions a Neon database, migrates SQLite to Postgres, updates db.ts/prisma.config/.env. All previously-flagged bugs are addressed. Minor: hasDirectDatabaseUrl is a misleading name for a variable that tracks DATABASE_URL=.
packages/cli/src/commands/setup/neon/neon.ts	Yargs command definition for setup neon; exposes --force flag and lazily imports the handler. Clean, no issues.
packages/cli/src/commands/setup.ts	Registers the new setupNeon subcommand in the top-level setup builder. Minimal, correct change.
packages/cli/src/commands/setup/neon/templates/db.ts.template	Template for the Neon-flavoured db.ts; wires PrismaPg adapter with DATABASE_URL, includes startup guard, and re-exports generated Prisma types. No issues found.
docs/implementation-docs/2026-03-26-cedarjs-project-overview.md	Adds neon to the CLI tree. The `

_{Reviews (9): Last reviewed commit: "Docs update and code formatting" | Re-trigger Greptile}