fix: passing parentId to externals

Author: egoist

src/plugins/node-resolve.ts

@@ -61,7 +61,7 @@ export default (options: Options) => {
         }
       }
 
-      if (isExternal(options.externals, id)) {
+      if (isExternal(options.externals, id, importer)) {
         return false
       }
 

src/types.ts

@@ -15,7 +15,10 @@ export type Env = {
   [k: string]: string | number | boolean
 }
 
-type External = string | RegExp | ((id: string) => boolean)
+export type External =
+  | string
+  | RegExp
+  | ((id: string, parentId?: string) => boolean)
 
 export type Externals = Array<External>
 

src/utils/is-external.ts

@@ -1,7 +1,11 @@
 import slash from 'slash'
 import { NormalizedConfig } from '../'
 
-export default function(externals: NormalizedConfig['externals'], id: string) {
+export default function(
+  externals: NormalizedConfig['externals'],
+  id: string,
+  parentId?: string
+) {
   id = slash(id)
 
   if (!Array.isArray(externals)) {
@@ -21,7 +25,7 @@ export default function(externals: NormalizedConfig['externals'], id: string) {
       }
     }
     if (typeof external === 'function') {
-      if (external(id)) {
+      if (external(id, parentId)) {
         return true
       }
     }