TSPD make use of alloy

.chronus/changes/tspd-alloy-2025-4-1-18-13-7.md

@@ -0,0 +1,8 @@
+---
+# Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
+changeKind: feature
+packages:
+  - "@typespec/tspd"
+---
+
+Migrate internal decorator signature generation to alloy

.chronus/changes/tspd-alloy-2025-4-2-2-58-14.md

@@ -0,0 +1,20 @@
+---
+# Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
+changeKind: internal
+packages:
+  - "@typespec/compiler"
+  - "@typespec/events"
+  - "@typespec/http"
+  - "@typespec/json-schema"
+  - "@typespec/openapi"
+  - "@typespec/openapi3"
+  - "@typespec/protobuf"
+  - "@typespec/rest"
+  - "@typespec/spector"
+  - "@typespec/sse"
+  - "@typespec/streams"
+  - "@typespec/versioning"
+  - "@typespec/xml"
+---
+
+Update to the generated tspd decorator test

.chronus/changes/upgrade-alloy-12-2025-3-30-17-41-55.md

@@ -8,3 +8,4 @@ packages:
 ---
 
 Upgrade to alloy 15
+

packages/compiler/generated-defs/TypeSpec.Prototypes.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "../src/index.js";
 import type { TypeSpecPrototypesDecorators } from "./TypeSpec.Prototypes.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecPrototypesDecorators = $decorators["TypeSpec.Prototypes"];

packages/compiler/generated-defs/TypeSpec.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "../src/index.js";
 import type { TypeSpecDecorators } from "./TypeSpec.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecDecorators = $decorators["TypeSpec"];

packages/events/generated-defs/TypeSpec.Events.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/events";
 import type { TypeSpecEventsDecorators } from "./TypeSpec.Events.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecEventsDecorators = $decorators["TypeSpec.Events"];

packages/http/generated-defs/TypeSpec.Http.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/http";
 import type { TypeSpecHttpDecorators } from "./TypeSpec.Http.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecHttpDecorators = $decorators["TypeSpec.Http"];

packages/json-schema/generated-defs/TypeSpec.JsonSchema.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/json-schema";
 import type { TypeSpecJsonSchemaDecorators } from "./TypeSpec.JsonSchema.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecJsonSchemaDecorators = $decorators["TypeSpec.JsonSchema"];

packages/openapi/generated-defs/TypeSpec.OpenAPI.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/openapi";
 import type { TypeSpecOpenAPIDecorators } from "./TypeSpec.OpenAPI.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecOpenAPIDecorators = $decorators["TypeSpec.OpenAPI"];

packages/openapi3/generated-defs/TypeSpec.OpenAPI.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/openapi3";
 import type { TypeSpecOpenAPIDecorators } from "./TypeSpec.OpenAPI.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecOpenAPIDecorators = $decorators["TypeSpec.OpenAPI"];

packages/protobuf/generated-defs/TypeSpec.Protobuf.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/protobuf";
 import type { TypeSpecProtobufDecorators } from "./TypeSpec.Protobuf.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecProtobufDecorators = $decorators["TypeSpec.Protobuf"];

packages/rest/generated-defs/TypeSpec.Rest.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/rest";
 import type { TypeSpecRestDecorators } from "./TypeSpec.Rest.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecRestDecorators = $decorators["TypeSpec.Rest"];

packages/spector/generated-defs/TypeSpec.Spector.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/spector";
 import type { TypeSpecSpectorDecorators } from "./TypeSpec.Spector.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecSpectorDecorators = $decorators["TypeSpec.Spector"];

packages/sse/generated-defs/TypeSpec.SSE.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/sse";
 import type { TypeSpecSSEDecorators } from "./TypeSpec.SSE.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecSSEDecorators = $decorators["TypeSpec.SSE"];

packages/streams/generated-defs/TypeSpec.Streams.ts-test.ts

@@ -1,5 +1,10 @@
-/** An error here would mean that the decorator is not exported or doesn't have the right name. */
+// An error in the imports would mean that the decorator is not exported or
+// doesn't have the right name.
+
 import { $decorators } from "@typespec/streams";
 import type { TypeSpecStreamsDecorators } from "./TypeSpec.Streams.js";
-/** An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ... */
+
+/**
+ * An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ...
+ */
 const _: TypeSpecStreamsDecorators = $decorators["TypeSpec.Streams"];

packages/tspd/package.json

@@ -40,8 +40,8 @@
   },
   "scripts": {
     "clean": "rimraf ./dist ./temp",
-    "build": "tsc -p .",
-    "watch": "tsc -p . --watch",
+    "build": "alloy build",
+    "watch": "alloy build --watch",
     "test": "vitest run",
     "test:watch": "vitest --watch",
     "test:ui": "vitest --ui",
@@ -55,6 +55,8 @@
     "!dist/test/**"
   ],
   "dependencies": {
+    "@alloy-js/core": "^0.15.0",
+    "@alloy-js/typescript": "^0.15.0",
     "@typespec/compiler": "workspace:^",
     "picocolors": "~1.1.1",
     "prettier": "~3.5.3",
@@ -64,6 +66,8 @@
     "typedoc-plugin-markdown": "^4.5.2"
   },
   "devDependencies": {
+    "@alloy-js/cli": "^0.15.0",
+    "@alloy-js/rollup-plugin": "^0.1.0",
     "@types/node": "~22.13.11",
     "@types/yargs": "~17.0.33",
     "@typespec/compiler": "workspace:^",

packages/tspd/src/gen-extern-signatures/components/decorator-signature-tests.tsx

@@ -0,0 +1,29 @@
+import * as ay from "@alloy-js/core";
+import * as ts from "@alloy-js/typescript";
+
+export interface DecoratorSignatureTests {
+  namespaceName: string;
+  dollarDecoratorRefKey: ay.Refkey;
+  dollarDecoratorsTypeRefKey: ay.Refkey;
+}
+
+export function DecoratorSignatureTests({
+  namespaceName,
+  dollarDecoratorRefKey,
+  dollarDecoratorsTypeRefKey,
+}: Readonly<DecoratorSignatureTests>) {
+  return (
+    <>
+      <hbr />
+      <hbr />
+      <ts.VarDeclaration
+        name="_"
+        type={dollarDecoratorsTypeRefKey}
+        doc="An error here would mean that the exported decorator is not using the same signature. Make sure to have export const $decName: DecNameDecorator = (...) => ..."
+      >
+        {dollarDecoratorRefKey}
+        {`["${namespaceName}"]`}
+      </ts.VarDeclaration>
+    </>
+  );
+}