chore: pruned some never-used code (trpc#3487)

.github/workflows/lint.yml

@@ -44,5 +44,8 @@ jobs:
       - name: Run ESLint
         run: pnpm lint
 
+      - name: Run ts-prune
+        run: pnpm lint-prune
+
       - name: Run Manypkg
         run: pnpm manypkg check

.ts-prunerc

@@ -0,0 +1,4 @@
+{
+  "error": true,
+  "ignore": ".d.ts|config.ts|examples|index.ts|packages/server/src/adapters/*"
+}

package.json

@@ -14,6 +14,7 @@
     "test-watch": "cd packages/tests && pnpm test-watch",
     "lint": "eslint --ext \".js,.ts,.tsx\" --ignore-path .gitignore . --report-unused-disable-directives",
     "lint-fix": "pnpm lint --fix && manypkg fix",
+    "lint-prune": "! ts-prune | grep -v \"used in module\"",
     "clean": "find . -name node_modules -o -name .turbo -o -name .next -o -name dist -type d -prune | xargs rm -rf",
     "codegen:override-prisma": "tsx scripts/addPrismaOverrides.ts",
     "codegen": "run-p codegen:*",
@@ -58,6 +59,7 @@
     "rollup-plugin-node-externals": "^5.0.0",
     "rollup-plugin-swc3": "^0.8.0",
     "rollup-plugin-typescript2": "^0.32.1",
+    "ts-prune": "^0.10.3",
     "tsx": "^3.9.0",
     "turbo": "^1.6.1",
     "typescript": "^4.8.3"

packages/server/src/core/internals/mergeRouters.ts

@@ -3,6 +3,7 @@ import { CombinedDataTransformer, defaultTransformer } from '../../transformer';
 import { AnyRouter, createRouterFactory } from '../router';
 import { mergeWithoutOverrides } from './mergeWithoutOverrides';
 
+// ts-prune-ignore-next -- Used in generated code
 export function mergeRouters(...routerList: AnyRouter[]): AnyRouter {
   const record = mergeWithoutOverrides(
     {},

packages/server/src/core/internals/utils.ts

@@ -64,7 +64,3 @@ export type PickFirstDefined<TType, TPick> = undefined extends TType
     ? never
     : TPick
   : TType;
-
-export type EnsureRecord<TRecord> = TRecord extends Record<string, any>
-  ? TRecord
-  : Record<string, never>;

packages/server/src/core/router.ts

@@ -137,13 +137,6 @@ export interface Router<TDef extends AnyRouterDef> {
   }): TDef['_config']['$types']['errorShape'];
 }
 
-/**
- * @internal
- */
-export type RouterBuildOptions<TConfig extends AnyRootConfig> = Partial<
-  Pick<AnyRouterDef<TConfig>, 'procedures'>
->;
-
 export type AnyRouter = Router<AnyRouterDef>;
 
 function isRouter(

packages/server/src/deprecated/router.ts

@@ -81,6 +81,7 @@ export type ProcedureRecord<
  * @public
  * @deprecated
  */
+// ts-prune-ignore-next
 export type inferProcedureInput<
   TProcedure extends Procedure<any, any, any, any, any, any, any>,
 > = TProcedure extends Procedure<any, any, any, infer Input, any, any, any>
@@ -109,6 +110,7 @@ export type inferProcedureOutput<
  * @beta
  * @deprecated
  */
+// ts-prune-ignore-next
 export type inferSubscriptionOutput<
   TRouter extends AnyRouter,
   TPath extends keyof TRouter['_def']['subscriptions'],
@@ -157,6 +159,7 @@ export type inferRouterContext<TRouter extends AnyRouter> = Parameters<
 /**
  * @internal
  */
+// ts-prune-ignore-next
 export type inferRouterMeta<TRouter extends AnyRouter> = TRouter extends Router<
   any,
   any,
@@ -189,6 +192,7 @@ export type AnyRouter<TContext extends Record<string, any> = any> = Router<
  * @internal
  * @deprecated
  */
+// ts-prune-ignore-next
 export type inferRouterError<TRouter extends AnyRouter> = ReturnType<
   TRouter['getErrorShape']
 >;

packages/tests/server/inferenceUtils.ts

@@ -13,7 +13,6 @@ export type And<Types extends boolean[]> = Types[number] extends true
 export type Eq<Left extends boolean, Right extends boolean> = Left extends true
   ? Right
   : Not<Right>;
-export type Xor<Types extends [boolean, boolean]> = Not<Eq<Types[0], Types[1]>>;
 
 const secret = Symbol('secret');
 type Secret = typeof secret;