Allow additional packages to be externalized

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "typescript.tsdk": "node_modules/typescript/lib"
+}

src/index.ts

@@ -7,6 +7,22 @@ interface UserOptions {
   deps: boolean,
   devDeps: boolean,
   except: Array<string | RegExp>,
+  /**
+   * Additional dependencies to externalize.
+   *
+   * @example
+   *
+   * ```ts
+   * externalizeDeps({
+   *   include: [
+   *     /^unlisted-dep(?:\/.*)?$/,
+   *   ],
+   * })
+   * ```
+   *
+   * @default []
+   */
+  include: Array<string | RegExp>,
   nodeBuiltins: boolean,
   optionalDeps: boolean,
   peerDeps: boolean,
@@ -38,6 +54,12 @@ const parseFile = (file: string) => {
  *         // Or match patterns with regular expressions.
  *         /^@some\/obscure(?:\/.+)?$/,
  *       ],
+ *       include: [
+ *         // Match exact values with strings.
+ *         '@some/obscure/dependency',
+ *         // Or match patterns with regular expressions.
+ *         /^@some\/obscure(?:\/.+)?$/,
+ *       ],
  *       nodeBuiltins: true,
  *       optionalDeps: true,
  *       peerDeps: true,
@@ -52,6 +74,7 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
     deps: true,
     devDeps: false,
     except: [],
+    include: [],
     nodeBuiltins: true,
     optionalDeps: true,
     peerDeps: true,
@@ -116,6 +139,7 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
       }
 
       const depMatchers = Array.from(externalDeps)
+
       const isException = (id: string) => {
         return optionsResolved.except.some((exception) => {
           if (typeof exception === 'string') {
@@ -126,6 +150,16 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
         })
       }
 
+      const isIncluded = (id: string) => {
+        return optionsResolved.include.some((included) => {
+          if (typeof included === 'string') {
+            return included === id
+          }
+
+          return included.test(id)
+        })
+      }
+
       return {
         build: {
           rollupOptions: {
@@ -134,6 +168,10 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
                 return false
               }
 
+              if (isIncluded(id)) {
+                return true
+              }
+
               return depMatchers.some((depMatcher) => depMatcher.test(id))
             },
           },

test/entry.ts

@@ -7,5 +7,7 @@ import { defineConfig } from 'vite'
 import esbuild from 'esbuild'
 // @ts-ignore
 import rollup from 'rollup'
+// @ts-ignore
+import hello from 'unlisted-dep'
 
-console.log(path, path2, resolve, chalk, esbuild, defineConfig, rollup)
+console.log(path, path2, resolve, chalk, esbuild, defineConfig, rollup, hello)

test/vite.config.ts

@@ -16,6 +16,9 @@ export default defineConfig({
     nodeResolve(),
     externalizeDeps({
       devDeps: true,
+      include: [
+        /^unlisted-dep(?:\/.*)?$/,
+      ],
       useFile: './test/test.json',
     }),
   ],