feat: make generated require() ESM compatible

lib/plugin/merge-options.ts

@@ -9,6 +9,7 @@ export interface PluginOptions {
   dtoKeyOfComment?: string;
   controllerKeyOfComment?: string;
   introspectComments?: boolean;
+  esmCompatible?: boolean;
   readonly?: boolean;
   pathToSource?: string;
   debug?: boolean;
@@ -27,6 +28,7 @@ const defaultOptions: PluginOptions = {
   dtoKeyOfComment: 'description',
   controllerKeyOfComment: 'summary',
   introspectComments: false,
+  esmCompatible: false,
   readonly: false,
   debug: false
 };

lib/plugin/utils/plugin-utils.ts

@@ -140,6 +140,16 @@ export function hasPropertyKey(
     .some((item) => item.name.getText() === key);
 }
 
+export function getOutputExtension(fileName: string): string {
+  if (fileName.endsWith('.mts')) {
+    return '.mjs';
+  } else if (fileName.endsWith('.cts')) {
+    return '.cjs';
+  } else {
+    return '.js';
+  }
+}
+
 export function replaceImportPath(
   typeReference: string,
   fileName: string,
@@ -148,6 +158,14 @@ export function replaceImportPath(
   if (!typeReference.includes('import')) {
     return { typeReference, importPath: null };
   }
+
+  if (options.esmCompatible) {
+    typeReference = typeReference.replace(
+      ', { with: { "resolution-mode": "import" } }',
+      ''
+    );
+  }
+
   let importPath = /\(\"([^)]).+(\")/.exec(typeReference)[0];
   if (!importPath) {
     return { typeReference: undefined, importPath: null };
@@ -193,6 +211,10 @@ export function replaceImportPath(
       if (indexPos >= 0) {
         relativePath = relativePath.slice(0, indexPos);
       }
+    } else if (options.esmCompatible) {
+      // Add appropriate extension for non-node_modules imports
+      const extension = getOutputExtension(fileName);
+      relativePath += extension;
     }
 
     typeReference = typeReference.replace(importPath, relativePath);
@@ -206,6 +228,7 @@ export function replaceImportPath(
         importPath: relativePath
       };
     }
+
     return {
       typeReference: typeReference.replace('import', 'require'),
       importPath: relativePath

lib/plugin/visitors/controller-class.visitor.ts

@@ -15,6 +15,7 @@ import {
 import {
   convertPath,
   getDecoratorOrUndefinedByNames,
+  getOutputExtension,
   getTypeReferenceAsString,
   hasPropertyKey
 } from '../utils/plugin-utils';
@@ -34,13 +35,14 @@ export class ControllerClassVisitor extends AbstractFileVisitor {
     return this._typeImports;
   }
 
-  get collectedMetadata(): Array<
-    [ts.CallExpression, Record<string, ClassMetadata>]
-  > {
+  collectedMetadata(
+    options: PluginOptions
+  ): Array<[ts.CallExpression, Record<string, ClassMetadata>]> {
     const metadataWithImports = [];
     Object.keys(this._collectedMetadata).forEach((filePath) => {
       const metadata = this._collectedMetadata[filePath];
-      const path = filePath.replace(/\.[jt]s$/, '');
+      const fileExt = options.esmCompatible ? getOutputExtension(filePath) : '';
+      const path = filePath.replace(/\.[jt]s$/, fileExt);
       const importExpr = ts.factory.createCallExpression(
         ts.factory.createToken(ts.SyntaxKind.ImportKeyword) as ts.Expression,
         undefined,

lib/plugin/visitors/model-class.visitor.ts

@@ -25,6 +25,7 @@ import {
   convertPath,
   extractTypeArgumentIfArray,
   getDecoratorOrUndefinedByNames,
+  getOutputExtension,
   getTypeReferenceAsString,
   hasPropertyKey,
   isAutoGeneratedEnumUnion,
@@ -43,13 +44,14 @@ export class ModelClassVisitor extends AbstractFileVisitor {
     return this._typeImports;
   }
 
-  get collectedMetadata(): Array<
-    [ts.CallExpression, Record<string, ClassMetadata>]
-  > {
+  collectedMetadata(
+    options: PluginOptions
+  ): Array<[ts.CallExpression, Record<string, ClassMetadata>]> {
     const metadataWithImports = [];
     Object.keys(this._collectedMetadata).forEach((filePath) => {
       const metadata = this._collectedMetadata[filePath];
-      const path = filePath.replace(/\.[jt]s$/, '');
+      const fileExt = options.esmCompatible ? getOutputExtension(filePath) : '';
+      const path = filePath.replace(/\.[jt]s$/, fileExt);
       const importExpr = ts.factory.createCallExpression(
         ts.factory.createToken(ts.SyntaxKind.ImportKeyword) as ts.Expression,
         undefined,

lib/plugin/visitors/readonly.visitor.ts

@@ -50,8 +50,8 @@ export class ReadonlyVisitor {
 
   collect() {
     return {
-      models: this.modelClassVisitor.collectedMetadata,
-      controllers: this.controllerClassVisitor.collectedMetadata
+      models: this.modelClassVisitor.collectedMetadata(this.options),
+      controllers: this.controllerClassVisitor.collectedMetadata(this.options)
     };
   }
 }

package.json

@@ -5,6 +5,8 @@
   "author": "Kamil Mysliwiec",
   "license": "MIT",
   "repository": "https://github.com/nestjs/swagger",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
   "scripts": {
     "build": "tsc -p tsconfig.build.json",
     "format": "prettier \"lib/**/*.ts\" --write",
@@ -13,6 +15,7 @@
     "publish:next": "npm publish --access public --tag next",
     "prepublish:npm": "npm run build",
     "publish:npm": "npm publish --access public",
+    "prepare": "npm run build",
     "test": "jest",
     "test:dev": "jest --watch",
     "test:e2e": "jest --config e2e/jest-e2e.json",

test/plugin/fixtures/create-option.ts

@@ -16,6 +16,7 @@ export const mergedCliPluginMultiOption = {
   dtoKeyOfComment: 'description',
   controllerKeyOfComment: 'summary',
   introspectComments: true,
+  esmCompatible: false,
   readonly: false,
   debug: false
 };
@@ -28,6 +29,7 @@ export const mergedCliPluginSingleOption = {
   dtoKeyOfComment: 'description',
   controllerKeyOfComment: 'summary',
   introspectComments: true,
+  esmCompatible: false,
   readonly: false,
   debug: false
 };

test/plugin/fixtures/parameter-property.dto.ts

@@ -1,11 +1,13 @@
+import { getOutputExtension } from '../../../lib/plugin/utils/plugin-utils';
+
 export const parameterPropertyDtoText = `
 export class ParameterPropertyDto {
   constructor(
-    readonly readonlyValue?: string, 
-    private privateValue: string | null, 
-    public publicValue: ItemDto[], 
+    readonly readonlyValue?: string,
+    private privateValue: string | null,
+    public publicValue: ItemDto[],
     regularParameter: string
-    protected protectedValue: string = '1234', 
+    protected protectedValue: string = '1234',
 ) {}
 }
 
@@ -20,7 +22,13 @@ export class ItemDto {
 }
 `;
 
-export const parameterPropertyDtoTextTranspiled = `import * as openapi from "@nestjs/swagger";
+export const parameterPropertyDtoTextTranspiled = (esmCompatible?: boolean) => {
+  let fileName = 'parameter-property.dto';
+  if (esmCompatible) {
+    fileName += getOutputExtension(fileName);
+  }
+
+  return `import * as openapi from "@nestjs/swagger";
 export class ParameterPropertyDto {
     constructor(readonlyValue, privateValue, publicValue, regularParameter, protectedValue = '1234') {
         this.readonlyValue = readonlyValue;
@@ -29,7 +37,7 @@ export class ParameterPropertyDto {
         this.protectedValue = protectedValue;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { readonlyValue: { required: false, type: () => String }, privateValue: { required: true, type: () => String, nullable: true }, publicValue: { required: true, type: () => [require("./parameter-property.dto").ItemDto] }, protectedValue: { required: true, type: () => String, default: "1234" } };
+        return { readonlyValue: { required: false, type: () => String }, privateValue: { required: true, type: () => String, nullable: true }, publicValue: { required: true, type: () => [require("./${fileName}").ItemDto] }, protectedValue: { required: true, type: () => String, default: "1234" } };
     }
 }
 export var LettersEnum;
@@ -43,7 +51,8 @@ export class ItemDto {
         this.enumValue = enumValue;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { enumValue: { required: true, enum: require("./parameter-property.dto").LettersEnum } };
+        return { enumValue: { required: true, enum: require("./${fileName}").LettersEnum } };
     }
 }
 `;
+};