KMP] Duplicate JVM class name

KMM에서 해당에러가 발생하는 파일들 1번라인에 다음을 추가하자(package 위에)

@file:JvmMultifileClass

나 같은 경우에는 shared 모듈에서

//CommonMain
expect class LoginHelper {
    val loginIn : CommonMutableStateFlow<Boolean>
    val auth : FBAuth
    fun registerTokenAction(
        result : GoogleResult,
        failAction: (msg:String) -> Unit,
        successAction: (credential : FBAuthCredential) -> Unit,
    )
}
fun LoginHelper.registerGoogleToken(
    result : GoogleResult,
    successAction: (FBAuthResult) -> Unit,
) {
    loginIn.value = true
    registerTokenAction(result, {}) { credential ->
        auth.signInWithCredential(credential, { loginIn.value = false }) {
            loginIn.value = false
            successAction(it)
        }
    }
}

fun LoginHelper.registerAnonymousToGoogle(
    result: GoogleResult,
    failAction: (msg:String) -> Unit,
    successAction: () -> Unit
) {
    registerTokenAction(result, failAction) { credential ->
        auth.linkWithCredential(credential, failAction) {
            successAction()
        }
    }
}

fun LoginHelper.signOut() {
    this.auth.signOut()
}

fun LoginHelper.delete() {
    this.auth.delete()
}

//AndroidMain
actual class LoginHelper(
    private val context: Context
) {

    private val googleIdOption: GetGoogleIdOption = GetGoogleIdOption.Builder()
        .setFilterByAuthorizedAccounts(false)
        .setServerClientId("private ID")
        .build()

    private val credentialManager  by lazy {
        CredentialManager.create(context)
    }

    actual val loginIn: CommonMutableStateFlow<Boolean> = MutableStateFlow(false).toCommonMutableStateFlow()

    actual val auth: FBAuth = FBAuth(Firebase.auth)
    actual fun registerTokenAction(
        result: GoogleResult,
        failAction: (msg: String) -> Unit,
        successAction: (credential: FBAuthCredential) -> Unit
    ) {
        val token = result.idToken
        try {
            val firebaseCredential = GoogleAuthProvider.getCredential(token, null)
            successAction(FBAuthCredential(firebaseCredential))
        } catch (e: ApiException) {
            loginIn.value = false
            when (e.statusCode) {
                CommonStatusCodes.CANCELED -> {
//                    failAction("One-tap dialog was closed.")
                }

                CommonStatusCodes.NETWORK_ERROR -> {
                    failAction("One-tap encountered a network error.")
                }

                else -> {
                    failAction("Couldn't get credential from result. (${e.localizedMessage})")
                }
            }
        }
    }

이런식으로 사용중이였는데

Duplicate JVM class name 'com/wonddak/loacell/auth/LoginHelperKt' generated from: LoginHelperKt, LoginHelperKt

위와같이 오류가 나서 찾아보다가 @file:JvmMultifileClass를 추가하고 해결되었다.

JvmMultifileClass는 @JvmName 과 함께 사용되며, top-level 함수가 여러 파일이 걸쳐 선언되어 있을 때 마치 하나의 파일에 선언되어 있는 것 처럼 사용하고 싶을 때 사용한다.