feat: make is-bun-module as optional peer dependency

Author: JounQin

package.json

@@ -65,20 +65,23 @@
   "peerDependencies": {
     "eslint": "*",
     "eslint-plugin-import": "*",
-    "eslint-plugin-import-x": "*"
+    "eslint-plugin-import-x": "*",
+    "is-bun-module": "*"
   },
   "peerDependenciesMeta": {
     "eslint-plugin-import": {
       "optional": true
     },
     "eslint-plugin-import-x": {
       "optional": true
+    },
+    "is-bun-module": {
+      "optional": true
     }
   },
   "dependencies": {
     "debug": "^4.4.0",
     "get-tsconfig": "^4.10.0",
-    "is-bun-module": "^1.3.0",
     "rspack-resolver": "^1.1.2",
     "stable-hash": "^0.0.5",
     "tinyglobby": "^0.2.12"
@@ -100,6 +103,7 @@
     "eslint": "^9.22.0",
     "eslint-import-resolver-typescript": "link:.",
     "eslint-plugin-import-x": "^4.8.0",
+    "is-bun-module": "^1.3.0",
     "lint-staged": "^15.5.0",
     "npm-run-all2": "^7.0.2",
     "prettier": "^3.5.3",

src/index.ts

@@ -8,7 +8,7 @@ import {
   createFilesMatcher,
   parseTsconfig,
 } from 'get-tsconfig'
-import { type Version, isBunModule, isSupportedNodeModule } from 'is-bun-module'
+import { type Version } from 'is-bun-module'
 import { ResolverFactory } from 'rspack-resolver'
 import { stableHash } from 'stable-hash'
 
@@ -53,6 +53,11 @@ const oxcResolve = (
   }
 }
 
+type IsBunModule = typeof import('is-bun-module')
+let isBunModule: IsBunModule | undefined
+
+const _filename = typeof __filename === 'string' ? __filename : import.meta.url
+
 export const resolve = (
   source: string,
   file: string,
@@ -69,8 +74,10 @@ export const resolve = (
     if (
       bunVersion
         ? module.isBuiltin(source)
-        : isBunModule(source, (bunVersion = 'latest')) ||
-          isSupportedNodeModule(source, bunVersion)
+        : (isBunModule ??= module.createRequire(_filename)(
+            'is-bun-module',
+          ) as IsBunModule).isBunModule(source, (bunVersion = 'latest')) ||
+          isBunModule.isSupportedNodeModule(source, bunVersion)
     ) {
       log('matched bun core:', source)
       return { found: true, path: null }

yarn.lock

@@ -6715,11 +6715,14 @@ __metadata:
     eslint: "*"
     eslint-plugin-import: "*"
     eslint-plugin-import-x: "*"
+    is-bun-module: "*"
   peerDependenciesMeta:
     eslint-plugin-import:
       optional: true
     eslint-plugin-import-x:
       optional: true
+    is-bun-module:
+      optional: true
   languageName: unknown
   linkType: soft