From 52f59a5dd8293f2945ada8781e8e6c41f274fbd7 Mon Sep 17 00:00:00 2001
From: Angelo Ashmore <angeloashmore@users.noreply.github.com>
Date: Tue, 8 Nov 2022 15:51:36 -1000
Subject: [PATCH] feat: add `internalDependencies` option (#2)

---
 src/index.ts                | 1 +
 src/plugins/extendConfig.ts | 7 ++++++-
 src/types.ts                | 5 +++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/index.ts b/src/index.ts
index cd0b7c8..f932782 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,6 +7,7 @@ import type { Options } from "./types";
 
 const DEFAULT_OPTIONS = {
 	dts: true,
+	internalDependencies: [],
 };
 
 const sdkPlugin = (rawOptions?: Partial<Options>): (Plugin | null)[] => {
diff --git a/src/plugins/extendConfig.ts b/src/plugins/extendConfig.ts
index 9c22e8f..098e5f9 100644
--- a/src/plugins/extendConfig.ts
+++ b/src/plugins/extendConfig.ts
@@ -35,7 +35,12 @@ export const extendConfigPlugin = (options: Options): Plugin => {
 						...Object.keys(options.packageJSON.optionalDependencies ?? {}),
 						...Object.keys(options.packageJSON.peerDependencies ?? {}),
 					].map((name) => new RegExp(`^${name}(?:\/.*)?$`)),
-				],
+				].filter(
+					(regexp) =>
+						!options.internalDependencies.some((internalDependency) =>
+							regexp.test(internalDependency),
+						),
+				),
 				output: {
 					preserveModules: true,
 					preserveModulesRoot: "src",
diff --git a/src/types.ts b/src/types.ts
index 578b07b..f5a688b 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -15,6 +15,11 @@ export interface Options {
 	 * @defaultValue `true`
 	 */
 	dts: boolean;
+
+	/**
+	 * A list of dependencies to ignore from Rollup's `external` option.
+	 */
+	internalDependencies: string[];
 }
 
 /**