chore: Migrate from npm to pnpm (#132)

* chore: Migratefrom npm to pnpm
* Update Node.js version matrix in CI workflow to remove 18.x 
* Fix example apps
* Fix fastify example

Author: mcampa

.github/workflows/node.js.yml

@@ -15,16 +15,18 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [20.x, 22.x, 24.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
       - uses: actions/checkout@v4
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-          cache: "npm"
-      - run: npm ci
-      - run: npm run build
-      - run: npm test
+          cache: "pnpm"
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm run build
+      - run: pnpm test

.github/workflows/npm-publish.yml

@@ -15,15 +15,18 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
           node-version: 22.x
-          registry-url: 'https://registry.npmjs.org'
-          cache: 'npm'
+          registry-url: "https://registry.npmjs.org"
+          cache: "pnpm"
 
       - name: Install dependencies
-        run: npm ci
+        run: pnpm install --frozen-lockfile
 
       - name: Check if version is publishable
         id: check_version
@@ -45,11 +48,11 @@ jobs:
 
       - name: Build package
         if: steps.check_version.outputs.should_publish == 'true'
-        run: npm run build
+        run: pnpm run build
 
       - name: Publish to NPM
         if: steps.check_version.outputs.should_publish == 'true'
-        run: npm publish
+        run: pnpm publish --no-git-checks
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 dist
-.DS_Store
+.DS_Store
+.claude

README.md

@@ -23,6 +23,8 @@ Note: This project is a fork of a fork, with full credit to the original authors
 **1. Install `trpc-to-openapi`.**
 
 ```bash
+# pnpm
+pnpm add trpc-to-openapi
 # npm
 npm install trpc-to-openapi
 # yarn
@@ -400,8 +402,6 @@ Please see [full typings here](src/adapters/node-http/core.ts).
 
 ---
 
-_Still using tRPC v9? See our [`.interop()`](examples/with-interop) example._
-
 ## License
 
 Distributed under the MIT License. See LICENSE for more information.

examples/with-express/README.md

@@ -2,10 +2,8 @@
 
 ### Getting started
 
-Make sure your current working directory is at `/trpc-to-openapi` root.
-
 ```bash
-npm install
-npm run build
-npm run dev -w with-express
+pnpm install
+pnpm run build
+pnpm run dev -w with-express
 ```

examples/with-express/package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "dev": "ts-node-dev --respawn --transpile-only --exit-child ./src/index.ts"
+    "dev": "tsx ./src/index.ts"
   },
   "dependencies": {
     "@trpc/server": "^11.1.0",
@@ -12,7 +12,9 @@
     "jsonwebtoken": "^9.0.0",
     "swagger-ui-express": "^4.6.3",
     "uuid": "^11.0.3",
-    "zod": "^4.0.0"
+    "trpc-to-openapi": "workspace:*",
+    "zod": "^4.0.0",
+    "zod-openapi": "5.4.2"
   },
   "devDependencies": {
     "@types/cors": "^2.8.13",
@@ -21,8 +23,7 @@
     "@types/node": "^22",
     "@types/swagger-ui-express": "^4.1.8",
     "@types/uuid": "^9.0.1",
-    "ts-node": "^10.9.1",
-    "ts-node-dev": "^2.0.0",
-    "typescript": "^5.8.3"
+    "tsx": "^4.20.0",
+    "typescript": "5.8.3"
   }
 }

examples/with-express/src/openapi.ts

@@ -23,7 +23,7 @@ const PostSchema = z.object({
 const ErrorSchema = z.object({
   message: z.string(),
   code: z.string(),
-  details: z.record(z.any()).optional(),
+  details: z.record(z.string(), z.string()).optional(),
 });
 
 // Generate OpenAPI schema document

examples/with-fastify/README.md

@@ -5,7 +5,7 @@
 Make sure your current working directory is at `/trpc-to-openapi` root.
 
 ```bash
-npm install
-npm run build
-npm run dev -w with-fastify
+pnpm install
+pnpm run build
+pnpm run dev -w with-fastify
 ```

examples/with-fastify/package.json

@@ -3,25 +3,26 @@
   "version": "1.0.0",
   "private": true,
   "scripts": {
-    "dev": "ts-node-dev --respawn --transpile-only --exit-child ./src/index.ts"
+    "dev": "tsx ./src/index.ts"
   },
   "dependencies": {
-    "@fastify/cors": "^8.2.1",
-    "@fastify/swagger": "^8.5.1",
-    "@trpc/server": "^11.1.0",
-    "fastify": "^4.17.0",
+    "@fastify/cors": "9.0.1",
+    "@fastify/static": "7.0.1",
+    "@fastify/swagger": "8.15.0",
+    "@fastify/swagger-ui": "2.1.0",
+    "@trpc/server": "11.1.0",
+    "fastify": "4.29.1",
     "jsonwebtoken": "^9.0.0",
     "uuid": "^11.0.3",
-    "zod": "^4.0.0"
+    "trpc-to-openapi": "workspace:*",
+    "zod": "^4.0.0",
+    "zod-openapi": "5.4.2"
   },
   "devDependencies": {
-    "@types/cors": "^2.8.13",
-    "@types/express": "^4.17.17",
     "@types/jsonwebtoken": "^9.0.2",
     "@types/node": "^22.15.14",
     "@types/uuid": "^9.0.1",
-    "ts-node": "^10.9.1",
-    "ts-node-dev": "^2.0.0",
-    "typescript": "^5.8.3"
+    "tsx": "^4.20.0",
+    "typescript": "5.8.3"
   }
 }

examples/with-fastify/src/index.ts

@@ -1,33 +1,31 @@
-/* 
-  eslint-disable
-  @typescript-eslint/no-misused-promises,
-  @typescript-eslint/no-unsafe-argument,
-  @typescript-eslint/no-explicit-any,
-  promise/always-return
- */
 import cors from '@fastify/cors';
 import fastifySwagger from '@fastify/swagger';
 import { fastifyTRPCPlugin } from '@trpc/server/adapters/fastify';
 import Fastify from 'fastify';
 import { fastifyTRPCOpenApiPlugin } from 'trpc-to-openapi';
-
+import fastifySwaggerUi from '@fastify/swagger-ui';
 import { openApiDocument } from './openapi';
 import { appRouter, createContext } from './router';
 
-const app = Fastify();
+const app = Fastify({
+  logger: true,
+});
 
 async function main() {
   // Setup CORS
-  await app.register(cors);
+
+  await app.register(cors, {});
 
   // Handle incoming tRPC requests
+
   await app.register(fastifyTRPCPlugin, {
     prefix: '/trpc',
     useWss: false,
     trpcOptions: { router: appRouter, createContext },
-  } as any);
+  });
 
   // Handle incoming OpenAPI requests
+
   await app.register(fastifyTRPCOpenApiPlugin, {
     basePath: '/api',
     router: appRouter,
@@ -38,18 +36,19 @@ async function main() {
   app.get('/openapi.json', () => openApiDocument);
 
   // Server Swagger UI
+
   await app.register(fastifySwagger, {
-    routePrefix: '/docs',
     mode: 'static',
     specification: { document: openApiDocument },
-    uiConfig: { displayOperationId: true },
-    exposeRoute: true,
+  });
+
+  await app.register(fastifySwaggerUi as any, {
+    routePrefix: '/docs',
   });
 
   await app
     .listen({ port: 3000 })
     .then((address) => {
-      app.swagger();
       console.log(`Server started on ${address}\nSwagger UI: http://localhost:3000/docs`);
     })
     .catch((e) => {