[Feat/#211] R8 난독화 및 코드 축소 도입

app/build.gradle.kts

@@ -72,7 +72,8 @@ android {
                 ?: System.getenv("BITNAGIL_PROD_URL")
                 ?: throw GradleException("bitnagil.prod.url 값이 없습니다.")
             buildConfigField("String", "BASE_URL", "\"$prodUrl\"")
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            isShrinkResources = true
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro",

app/proguard-rules.pro

@@ -1,21 +1,45 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
+-keepattributes SourceFile,LineNumberTable
+-renamesourcefileattribute SourceFile
 
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
+# [Kakao SDK 버그 방어]
+# AccessTokenInterceptor에서 ClientErrorCause 상수를 리플렉션(getField)으로 찾기 때문에 난독화에서 제외함
+-keep enum com.kakao.sdk.common.model.ClientErrorCause {
+    *;
+}
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# [Kotlinx Serialization]
+# 모든 @Serializable 클래스의 직렬화 로직 및 serializer 메서드 유지
+-keepattributes Annotation, InnerClasses, Signature, Exceptions
+-keepclassmembers class * {
+    @kotlinx.serialization.Serializable *;
+}
+-keepclassmembers class * {
+    kotlinx.serialization.KSerializer serializer(...);
+}
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+# [Domain/Data Layer Enums]
+# API 응답 매핑 및 리플렉션 방어를 위해 Enum 상수 이름 유지
+-keepclassmembers enum com.threegap.bitnagil.domain.**.model.** {
+    <fields>;
+}
+-keepclassmembers enum com.threegap.bitnagil.data.**.model.** {
+    <fields>;
+}
+
+# [Compose Navigation Type-Safe Arguments]
+# 네비게이션 인자 클래스 및 Route 객체 보존
+-keep class com.threegap.bitnagil.presentation.**.model.navarg.** { *; }
+-keep class com.threegap.bitnagil.Route** { *; }
+# HomeRoute는 navigation.home 패키지로 Route** 패턴 밖이므로 별도 보호
+# Compose Navigation이 내부적으로 serializer descriptor name을 route ID로 사용하므로
+# deep link 추가 시 repackaging으로 빌드마다 route string이 달라지는 문제 방어
+-keep class com.threegap.bitnagil.navigation.home.HomeRoute** { *; }
+
+# [Kotlin Result - Retrofit 반환 타입]
+# suspend fun foo(): Result<T> 형태의 Retrofit 인터페이스에서
+# R8이 kotlin.Result의 제네릭 타입 인자를 지워 call adapter 탐색 실패 방어
+-keep class kotlin.Result { *; }
+
+# [Network Libraries]
+# Retrofit 및 OkHttp 어노테이션 유지
+-keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations

core/designsystem/src/main/java/com/threegap/bitnagil/designsystem/font/Font.kt

@@ -1,23 +1,36 @@
 package com.threegap.bitnagil.designsystem.font
 
+import androidx.compose.ui.text.ExperimentalTextApi
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
-import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.font.FontVariation
 import androidx.compose.ui.text.font.FontWeight
 import com.threegap.bitnagil.designsystem.R
 
+@OptIn(ExperimentalTextApi::class)
 val pretendard = FontFamily(
-    Font(R.font.pretendard_black, FontWeight.Black, FontStyle.Normal),
-    Font(R.font.pretendard_extra_bold, FontWeight.ExtraBold, FontStyle.Normal),
-    Font(R.font.pretendard_bold, FontWeight.Bold, FontStyle.Normal),
-    Font(R.font.pretendard_semi_bold, FontWeight.SemiBold, FontStyle.Normal),
-    Font(R.font.pretendard_medium, FontWeight.Medium, FontStyle.Normal),
-    Font(R.font.pretendard_regular, FontWeight.Normal, FontStyle.Normal),
-    Font(R.font.pretendard_light, FontWeight.Light, FontStyle.Normal),
-    Font(R.font.pretendard_extra_light, FontWeight.ExtraLight, FontStyle.Normal),
-    Font(R.font.pretendard_thin, FontWeight.Thin, FontStyle.Normal),
+    Font(
+        resId = R.font.pretendard_variable,
+        weight = FontWeight.Bold,
+        variationSettings = FontVariation.Settings(FontVariation.weight(700)),
+    ),
+    Font(
+        resId = R.font.pretendard_variable,
+        weight = FontWeight.SemiBold,
+        variationSettings = FontVariation.Settings(FontVariation.weight(600)),
+    ),
+    Font(
+        resId = R.font.pretendard_variable,
+        weight = FontWeight.Medium,
+        variationSettings = FontVariation.Settings(FontVariation.weight(500)),
+    ),
+    Font(
+        resId = R.font.pretendard_variable,
+        weight = FontWeight.Normal,
+        variationSettings = FontVariation.Settings(FontVariation.weight(400)),
+    ),
 )
 
 val cafe24SsurroundAir = FontFamily(
-    Font(R.font.cafe_24_ssurround_air_v1_1, FontWeight.Light, FontStyle.Normal),
+    Font(R.font.cafe_24_ssurround_air_v1_1, FontWeight.Light),
 )

core/network/consumer-rules.pro

@@ -0,0 +1,4 @@
+# [ResultCallAdapter]
+# Retrofit Call Adapter 팩토리 및 네트워크 모델 보존
+-keep class com.threegap.bitnagil.network.calladapter.** { *; }
+-keep class com.threegap.bitnagil.network.model.** { *; }

data/consumer-rules.pro

@@ -0,0 +1,4 @@
+# [Retrofit Service Interfaces]
+# R8이 제네릭 시그니처를 제거하면 ResultCallAdapterFactory가 Call<Result<T>>의
+# 타입 인자를 런타임에 읽지 못해 "Unable to create call adapter" 에러 발생
+-keep interface com.threegap.bitnagil.data.**.service.** { *; }