feat: lazy load oxc-transformer

Author: sxzz

src/core/transformer.ts

@@ -1,12 +1,15 @@
-import { isolatedDeclaration } from 'oxc-transform'
 import type { TranspileOptions } from 'typescript'
 
 export interface TransformResult {
   code: string
   errors: Array<string>
 }
 
-export function oxcTransform(id: string, code: string): TransformResult {
+export async function oxcTransform(
+  id: string,
+  code: string,
+): Promise<TransformResult> {
+  const { isolatedDeclaration } = await import('oxc-transform')
   return isolatedDeclaration(id, code, { sourcemap: false })
 }
 

src/index.ts

@@ -97,7 +97,7 @@ export const IsolatedDecl: UnpluginInstance<Options | undefined, false> =
       let result: TransformResult
       switch (options.transformer) {
         case 'oxc':
-          result = oxcTransform(id, code)
+          result = await oxcTransform(id, code)
           break
         case 'swc':
           result = await swcTransform(id, code)