prisma: Client should contain `Enum` even if not used by a model

Bug description

Enum declared in the prisma.schema, but not used for any model field, is created in the migration but not in the client index.d.ts.

I want to use the prisma.schema as the source of truth and map my GraphQL codegen config to point to the generated Prisma enums.

How to reproduce (all in https://github.com/okomarov/prisma)

Clone this repo, cd to the /enum_not_generated and then run:

docker compose up -d

after that you create a migration:

yarn prisma migrate dev -n 'Add enum'

and verify that it contains:

-- CreateEnum
CREATE TYPE "Color" AS ENUM ('RED', 'BLUE');

So it correctly detects the enum. Then generate the Prisma client:

yarn prisma generate

and check that prisma/output/index.d.ts does NOT contain:

export const Color: {
  RED: 'RED',
  BLUE: 'BLUE'
};

This ‘enum’ will be added if we add it e.g. to our Dummy model like so:

model Dummy {
  id    String @id @db.Uuid
  color Color
}

Expected behavior

Prisma generates the enum in the client’s index.d.ts regardless wether it’s used by a model.

Prisma information

generator client {
  provider = "prisma-client-js"
  output   = "./output"
}

datasource db {
  provider = "postgresql"
  url      = env("DB_URL")
}

model Dummy {
  id String @id @db.Uuid
}

enum Color {
  RED
  BLUE
}

Environment & setup

• OS: MacOS
• Database: PostgreSQL 14
• Node.js version: v16.14.0

Prisma Version

prisma                  : 3.14.0
@prisma/client          : 3.14.0
Current platform        : darwin-arm64
Query Engine (Node-API) : libquery-engine 2b0c12756921c891fec4f68d9444e18c7d5d4a6a (at node_modules/@prisma/engines/libquery_engine-darwin-arm64.dylib.node)
Migration Engine        : migration-engine-cli 2b0c12756921c891fec4f68d9444e18c7d5d4a6a (at node_modules/@prisma/engines/migration-engine-darwin-arm64)
Introspection Engine    : introspection-core 2b0c12756921c891fec4f68d9444e18c7d5d4a6a (at node_modules/@prisma/engines/introspection-engine-darwin-arm64)
Format Binary           : prisma-fmt 2b0c12756921c891fec4f68d9444e18c7d5d4a6a (at node_modules/@prisma/engines/prisma-fmt-darwin-arm64)
Default Engines Hash    : 2b0c12756921c891fec4f68d9444e18c7d5d4a6a
Studio                  : 0.460.0