refactor: module transpiler

Author: omermecitoglu

src/core/next.ts

@@ -33,12 +33,20 @@ async function safeEval(code: string, routePath: string) {
   }
 }
 
+async function getModuleTranspiler() {
+  if (typeof require === "undefined") {
+    const { transpileModule } = await import(/* webpackIgnore: true */ "typescript");
+    return transpileModule;
+  }
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  return require(/* webpackIgnore: true */ "typescript").transpileModule;
+}
+
 export async function getRouteExports(routePath: string, routeDefinerName: string, schemas: Record<string, unknown>) {
   const rawCode = await fs.readFile(routePath, "utf-8");
   const middlewareName = detectMiddlewareName(rawCode);
   const isCommonJS = typeof module !== "undefined" && typeof module.exports !== "undefined";
-  const { transpileModule } = await import(/* webpackIgnore: true */ "typescript");
-  const code = transpile(isCommonJS, rawCode, middlewareName, transpileModule);
+  const code = transpile(isCommonJS, rawCode, middlewareName, await getModuleTranspiler());
   const fixedCode = Object.keys(schemas).reduce(injectSchemas, code);
   (global as Record<string, unknown>)[routeDefinerName] = defineRoute;
   (global as Record<string, unknown>).z = z;

src/core/transpile.test.ts

@@ -1,9 +1,10 @@
+import { transpileModule } from "typescript";
 import { describe, expect, it } from "vitest";
 import { transpile } from "./transpile";
 
 describe("transpile", () => {
   it("should inject export fixers", () => {
-    const result = transpile(true, "", null);
+    const result = transpile(true, "", null, transpileModule);
     expect(result).toContain("exports.GET = void 0;");
     expect(result).toContain("exports.POST = void 0;");
     expect(result).toContain("exports.PUT = void 0;");
@@ -14,7 +15,7 @@ describe("transpile", () => {
   });
 
   it("should inject a placeholder function for the middleware", () => {
-    const result = transpile(true, "", "myAwesomeMiddleware");
+    const result = transpile(true, "", "myAwesomeMiddleware", transpileModule);
     expect(result).toContain("const myAwesomeMiddleware = (handler) => handler;");
   });
 });