fix: count in optionalDependencies in autoExternal.

.github/workflows/lint.yml

@@ -30,10 +30,10 @@ jobs:
       - name: Install Pnpm
         run: corepack enable
 
-      - name: Setup Node.js 18.x
+      - name: Setup Node.js 20
         uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version: 20
           cache: 'pnpm'
 
       - name: Install Dependencies

.github/workflows/release-pull-request.yml

@@ -29,10 +29,10 @@ jobs:
       - name: Install Pnpm
         run: corepack enable
 
-      - name: Setup Node.js 18
+      - name: Setup Node.js 20
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: 20
           cache: 'pnpm'
 
       - name: Install Dependencies

.github/workflows/release.yml

@@ -37,10 +37,10 @@ jobs:
       - name: Install Pnpm
         run: corepack enable
 
-      - name: Setup Node.js 18
+      - name: Setup Node.js 20
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: 20
           cache: 'pnpm'
 
       - name: Install Dependencies

.github/workflows/test-ubuntu.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -64,7 +64,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:

.github/workflows/test-windows.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -69,7 +69,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:

.nvmrc

@@ -1 +1 @@
-v18.20.2
+20

CONTRIBUTING.md

@@ -4,7 +4,7 @@ Thanks for that you are interested in contributing to Rslib. Before starting you
 
 ## Install Node.js
 
-Use [fnm](https://github.com/Schniz/fnm) or [nvm](https://github.com/nvm-sh/nvm) to run the command below. This will switch to the Node.js version (currently 18) specified in the project's `.nvmrc` file.
+Use [fnm](https://github.com/Schniz/fnm) or [nvm](https://github.com/nvm-sh/nvm) to run the command below. This will switch to the Node.js version (currently 20) specified in the project's `.nvmrc` file.
 
 ```bash
 # with fnm

packages/core/src/config.ts

@@ -227,21 +227,27 @@ export const composeAutoExternalConfig = (options: {
     return {};
   }
 
+  // User externals configuration has higher priority than autoExternal
+  // eg: autoExternal: ['react'], user: output: { externals: { react: 'react-1' } }
+  // Only handle the case where the externals type is object, string / string[] does not need to be processed, other types are too complex.
+  const userExternalKeys =
+    userExternals && isObject(userExternals) ? Object.keys(userExternals) : [];
+
   const externalOptions = {
     dependencies: true,
+    optionalDependencies: true,
     peerDependencies: true,
     devDependencies: false,
     ...(autoExternal === true ? {} : autoExternal),
   };
 
-  // User externals configuration has higher priority than autoExternal
-  // eg: autoExternal: ['react'], user: output: { externals: { react: 'react-1' } }
-  // Only handle the case where the externals type is object, string / string[] does not need to be processed, other types are too complex.
-  const userExternalKeys =
-    userExternals && isObject(userExternals) ? Object.keys(userExternals) : [];
-
   const externals = (
-    ['dependencies', 'peerDependencies', 'devDependencies'] as const
+    [
+      'dependencies',
+      'peerDependencies',
+      'devDependencies',
+      'optionalDependencies',
+    ] as const
   )
     .reduce<string[]>((prev, type) => {
       if (externalOptions[type]) {

packages/core/src/types/utils.ts

@@ -1,6 +1,7 @@
 export type PkgJson = {
+  type?: 'module' | 'commonjs';
   dependencies?: Record<string, string>;
   peerDependencies?: Record<string, string>;
   devDependencies?: Record<string, string>;
-  [key: string]: unknown;
+  optionalDependencies?: Record<string, string>;
 };

packages/plugin-dts/src/dts.ts

@@ -26,6 +26,7 @@ export const calcBundledPackages = (options: {
     dependencies?: Record<string, string>;
     peerDependencies?: Record<string, string>;
     devDependencies?: Record<string, string>;
+    optionalDependencies?: Record<string, string>;
   };
 
   try {
@@ -42,6 +43,7 @@ export const calcBundledPackages = (options: {
     ? {
         dependencies: true,
         peerDependencies: true,
+        optionalDependencies: true,
         devDependencies: false,
         ...(autoExternal === true ? {} : autoExternal),
       }