Add support for dev deps

Author: davidmyersdev

README.md

@@ -39,6 +39,7 @@ Pass an object to `externalizeDeps` to override the default configuration.
 // These are the default values.
 externalizeDeps({
   deps: true,
+  devDeps: false,
   nodeBuiltins: true,
   optionalDeps: true,
   peerDeps: true,

src/index.ts

@@ -5,6 +5,7 @@ import type { Plugin } from 'vite'
 
 interface UserOptions {
   deps: boolean,
+  devDeps: boolean,
   nodeBuiltins: boolean,
   optionalDeps: boolean,
   peerDeps: boolean,
@@ -18,6 +19,7 @@ const parseFile = (file: string) => {
 export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
   const optionsResolved: UserOptions = {
     deps: true,
+    devDeps: false,
     nodeBuiltins: true,
     optionalDeps: true,
     peerDeps: true,
@@ -31,7 +33,12 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
     config: (_config, _env) => {
       if (existsSync(optionsResolved.useFile)) {
         const externalDeps = new Set<RegExp>()
-        const { dependencies = {}, optionalDependencies = {}, peerDependencies = {} } = parseFile(optionsResolved.useFile)
+        const {
+          dependencies = {},
+          devDependencies = {},
+          optionalDependencies = {},
+          peerDependencies = {},
+        } = parseFile(optionsResolved.useFile)
 
         if (optionsResolved.deps) {
           Object.keys(dependencies).forEach((dep) => {
@@ -41,6 +48,14 @@ export const externalizeDeps = (options: Partial<UserOptions> = {}): Plugin => {
           })
         }
 
+        if (optionsResolved.devDeps) {
+          Object.keys(devDependencies).forEach((dep) => {
+            const depMatcher = new RegExp(`^${dep}(?:/.+)?$`)
+
+            externalDeps.add(depMatcher)
+          })
+        }
+
         if (optionsResolved.nodeBuiltins) {
           builtinModules.forEach((builtinModule) => {
             const builtinMatcher = new RegExp(`^(?:node:)?${builtinModule}$`)

test/entry.ts

@@ -2,5 +2,10 @@ import path from 'path'
 import path2 from 'node:path'
 import { resolve } from 'path'
 import chalk from 'chalk'
+import { defineConfig } from 'vite'
+// @ts-ignore
+import esbuild from 'esbuild'
+// @ts-ignore
+import rollup from 'rollup'
 
-console.log(path, path2, resolve, chalk)
+console.log(path, path2, resolve, chalk, esbuild, defineConfig, rollup)

test/test.json

@@ -3,5 +3,14 @@
   "packageManager": "[email protected]",
   "dependencies": {
     "chalk": "^5.0.1"
+  },
+  "devDependencies": {
+    "vite": "^3.0.0"
+  },
+  "optionalDependencies": {
+    "esbuild": "^0.0.0"
+  },
+  "peerDependencies": {
+    "rollup": "^2.0.0"
   }
 }

test/vite.config.ts

@@ -15,6 +15,7 @@ export default defineConfig({
     // We need nodeResolve to resolve dependencies of chalk.
     nodeResolve(),
     externalizeDeps({
+      devDeps: true,
       useFile: './test/test.json',
     }),
   ],