feat(cli): setup neon by Tobbe · Pull Request #1762 · cedarjs/cedar

Tobbe · 2026-05-12T18:16:51Z

Add setup command for using a new Neon Postgres database

netlify · 2026-05-12T18:16:57Z

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nx-cloud · 2026-05-12T18:19:59Z

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greptile-apps · 2026-05-12T18:20:30Z

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}

- Add equality check after deriving DIRECT_DATABASE_URL from pooler URL - Change adapter/config skip conditions to check for PrismaPg presence - Guard addWorkspacePackages against unsupported providers Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

…y configured When DATABASE_URL exists without --force, provisioning is skipped so DIRECT_DATABASE_URL is never written. Updating prisma.config to reference DIRECT_DATABASE_URL in this state breaks subsequent migrations. Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

github-actions · 2026-05-13T08:09:17Z

The changes in this PR are now available on npm.

Try them out by running yarn cedar upgrade -t 5.0.0-canary.2327

Or try it in a new app with yarn dlx create-cedar-app@5.0.0-canary.2327

Add setup command for using a new Neon Postgres database --------- Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

feat(cli): setup neon

013a500

github-actions Bot added this to the next-release milestone May 12, 2026

greptile-apps Bot reviewed May 12, 2026

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fix greptile review comments

96bfc84

greptile-apps Bot reviewed May 12, 2026

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Comment thread packages/cli/src/commands/setup/neon/neonHandler.ts

Tobbe added 3 commits May 12, 2026 22:46

better regex

a2a414c

improve neon setup after testing locally

f380f45

Fix prisma migrate

23acbf4

greptile-apps Bot reviewed May 12, 2026

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Comment thread packages/cli/src/commands/setup/neon/neonHandler.ts

Tobbe added 2 commits May 13, 2026 01:11

only support sqlite -> pg

b3fd0a2

fix two more review comments

469422b

greptile-apps Bot reviewed May 12, 2026

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Comment thread packages/cli/src/commands/setup/neon/neonHandler.ts Outdated

greptile-apps Bot reviewed May 13, 2026

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Comment thread packages/cli/src/commands/setup/neon/neonHandler.ts

Tobbe and others added 2 commits May 13, 2026 08:45

Docs update and code formatting

a2b8b99

Tobbe merged commit e7b680a into main May 13, 2026
71 of 75 checks passed

Tobbe deleted the tobbe-feat-cli-setup-neon branch May 13, 2026 07:57

Tobbe added a commit that referenced this pull request May 13, 2026

feat(cli): setup neon (#1762)

f3ab42f

Add setup command for using a new Neon Postgres database --------- Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

Tobbe modified the milestones: next-release, v4.2.0 May 13, 2026

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feat(cli): setup neon#1762

feat(cli): setup neon#1762
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Greptile Summary

Confidence Score: 5/5

Important Files Changed

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