From af4cbabf72bd4547736bc3a28a3047fd6ae52ff2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oskar=20Segersva=CC=88rd?= <victorystick@gmail.com>
Date: Fri, 22 Jan 2016 12:21:30 +0100
Subject: [PATCH 1/2] Add failing test with a d.ts-file

---
 .gitignore                                  |  2 +-
 test/sample/dts/main.ts                     |  3 +++
 test/sample/dts/node_modules/an-import.d.ts |  1 +
 test/test.js                                | 11 +++++++++++
 4 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 test/sample/dts/main.ts
 create mode 100644 test/sample/dts/node_modules/an-import.d.ts

diff --git a/.gitignore b/.gitignore
index 2dc1150..3313bea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-node_modules
+/node_modules
 dist
 src/*.js
 test/sample/**/*.js
diff --git a/test/sample/dts/main.ts b/test/sample/dts/main.ts
new file mode 100644
index 0000000..4d1c21f
--- /dev/null
+++ b/test/sample/dts/main.ts
@@ -0,0 +1,3 @@
+import { foo } from 'an-import';
+
+foo();
diff --git a/test/sample/dts/node_modules/an-import.d.ts b/test/sample/dts/node_modules/an-import.d.ts
new file mode 100644
index 0000000..8b1a393
--- /dev/null
+++ b/test/sample/dts/node_modules/an-import.d.ts
@@ -0,0 +1 @@
+// empty
diff --git a/test/test.js b/test/test.js
index c9b05e6..5416068 100644
--- a/test/test.js
+++ b/test/test.js
@@ -106,6 +106,17 @@ describe( 'rollup-plugin-typescript', function () {
 		});
 	});
 
+	it( 'should not resolve .d.ts files', function () {
+		return rollup.rollup({
+			entry: 'sample/dts/main.ts',
+			plugins: [
+				typescript()
+			]
+		}).then( function ( bundle ) {
+			assert.deepEqual( bundle.imports, [ 'an-import' ] );
+		});
+	});
+
 	it( 'should transpile JSX if enabled', function () {
 		return rollup.rollup({
 			entry: 'sample/jsx/main.tsx',

From 04743bcec301b9f67b926251f72b6b5aa707738d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oskar=20Segersva=CC=88rd?= <victorystick@gmail.com>
Date: Fri, 22 Jan 2016 12:23:53 +0100
Subject: [PATCH 2/2] Do not resolve or transform d.ts-files

---
 src/index.ts  | 10 +++++++++-
 src/string.ts |  3 +++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 src/string.ts

diff --git a/src/index.ts b/src/index.ts
index 1cb8114..e142491 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,6 +3,7 @@ import { createFilter } from 'rollup-pluginutils';
 import { statSync } from 'fs';
 import assign from 'object-assign';
 
+import { endsWith } from './string';
 import fixExportClass from './fixExportClass';
 
 const jsxOptions = {
@@ -28,7 +29,10 @@ function goodErrors ( diagnostic: ts.Diagnostic ): boolean {
 export default function typescript ( options ) {
 	options = assign( {}, options || {} );
 
-	const filter = createFilter( options.include || [ '*.ts+(|x)', '**/*.ts+(|x)' ], options.exclude );
+	const filter = createFilter(
+		options.include || [ '*.ts+(|x)', '**/*.ts+(|x)' ],
+		options.exclude || [ '*.d.ts', '**/*.d.ts' ] );
+
 	delete options.include;
 	delete options.exclude;
 
@@ -52,6 +56,10 @@ export default function typescript ( options ) {
 			var result = typescript.nodeModuleNameResolver( importee, importer, resolveHost );
 
 			if ( result.resolvedModule && result.resolvedModule.resolvedFileName ) {
+				if ( endsWith( result.resolvedModule.resolvedFileName, '.d.ts' ) ) {
+					return null;
+				}
+
 				return result.resolvedModule.resolvedFileName;
 			}
 
diff --git a/src/string.ts b/src/string.ts
new file mode 100644
index 0000000..d863554
--- /dev/null
+++ b/src/string.ts
@@ -0,0 +1,3 @@
+export function endsWith ( str: string, tail: string ): boolean {
+	return !tail.length || str.slice( -tail.length ) === tail;
+}