feat: add option to keep extensions for amd

src/finalisers/amd.ts

@@ -35,7 +35,9 @@ export default function amd(
 	}: NormalizedOutputOptions
 ): Bundle {
 	warnOnBuiltins(warn, dependencies);
-	const deps = dependencies.map(m => `'${removeExtensionFromRelativeAmdId(m.id)}'`);
+	const deps = dependencies.map(
+		m => `'${amd.keepExtension ? m.id : removeExtensionFromRelativeAmdId(m.id)}'`
+	);
 	const args = dependencies.map(m => m.name);
 	const { n, getNonArrowFunctionIntro, _ } = snippets;
 

src/rollup/types.d.ts

@@ -631,6 +631,7 @@ export type AmdOptions = (
 	  }
 ) & {
 	define?: string;
+	keepExtension?: boolean;
 };
 
 export type NormalizedAmdOptions = (
@@ -644,6 +645,7 @@ export type NormalizedAmdOptions = (
 	  }
 ) & {
 	define: string;
+	keepExtension: boolean;
 };
 
 export interface OutputOptions {

src/utils/options/normalizeOutputOptions.ts

@@ -225,10 +225,17 @@ const getPreserveModulesRoot = (
 };
 
 const getAmd = (config: OutputOptions): NormalizedOutputOptions['amd'] => {
-	const mergedOption: { autoId: boolean; basePath: string; define: string; id?: string } = {
+	const mergedOption: {
+		autoId: boolean;
+		basePath: string;
+		define: string;
+		id?: string;
+		keepExtension: boolean;
+	} = {
 		autoId: false,
 		basePath: '',
 		define: 'define',
+		keepExtension: false,
 		...config.amd
 	};
 
@@ -256,13 +263,15 @@ const getAmd = (config: OutputOptions): NormalizedOutputOptions['amd'] => {
 		normalized = {
 			autoId: true,
 			basePath: mergedOption.basePath,
-			define: mergedOption.define
+			define: mergedOption.define,
+			keepExtension: mergedOption.keepExtension
 		};
 	} else {
 		normalized = {
 			autoId: false,
 			define: mergedOption.define,
-			id: mergedOption.id
+			id: mergedOption.id,
+			keepExtension: mergedOption.keepExtension
 		};
 	}
 	return normalized;