fix: inline mlly.interopDefault (resolves #48)

src/jiti.ts

@@ -10,8 +10,7 @@ import createRequire from 'create-require'
 import semver from 'semver'
 import { addHook } from 'pirates'
 import objectHash from 'object-hash'
-import { interopDefault } from 'mlly'
-import { isDir, isWritable, md5, detectESMSyntax, detectLegacySyntax } from './utils'
+import { interopDefault, isDir, isWritable, md5, detectESMSyntax, detectLegacySyntax } from './utils'
 import { TransformOptions, JITIOptions } from './types'
 
 const _EnvDebug = destr(process.env.JITI_DEBUG)

src/utils.ts

@@ -31,3 +31,39 @@ export function detectESMSyntax (code: string) {
 export function detectLegacySyntax (code: string) {
   return code.match(/\?\.|\?\?/)
 }
+
+export function isObject (val: any) {
+  return val !== null && typeof val === 'object'
+}
+
+// TODO: Use mlly (https://github.com/unjs/jiti/issues/48)
+export function interopDefault (sourceModule: any) {
+  if (!isObject(sourceModule) || !('default' in sourceModule)) {
+    return sourceModule
+  }
+  const newModule = sourceModule.default
+  for (const key in sourceModule) {
+    if (key === 'default') {
+      try {
+        if (!(key in newModule)) {
+          Object.defineProperty(newModule, key, {
+            enumerable: false,
+            configurable: false,
+            get () { return newModule }
+          })
+        }
+      } catch (_err) {}
+    } else {
+      try {
+        if (!(key in newModule)) {
+          Object.defineProperty(newModule, key, {
+            enumerable: true,
+            configurable: true,
+            get () { return sourceModule[key] }
+          })
+        }
+      } catch (_err) {}
+    }
+  }
+  return newModule
+}