Reinstate Proguard/R8

Co-Authored-By: Ivan Iskandar <12537387+ivaniskandar@users.noreply.github.com>

app/build.gradle.kts

@@ -67,6 +67,9 @@ android {
         }
         getByName("release") {
             applicationIdSuffix = ".j2k"
+            isShrinkResources = true
+            isMinifyEnabled = true
+            proguardFiles("proguard-android-optimize.txt", "proguard-rules.pro")
         }
     }
 

app/progaurd-android-optimize.txt

@@ -0,0 +1,34 @@
+-allowaccessmodification
+-dontusemixedcaseclassnames
+-verbose
+
+-keepattributes *Annotation*
+
+-keepclasseswithmembernames,includedescriptorclasses class * {
+    native <methods>;
+}
+
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keepclassmembers class * implements android.os.Parcelable {
+  public static final ** CREATOR;
+}
+
+-keep class androidx.annotation.Keep
+
+-keep @androidx.annotation.Keep class * {*;}
+
+-keepclasseswithmembers class * {
+    @androidx.annotation.Keep <methods>;
+}
+
+-keepclasseswithmembers class * {
+    @androidx.annotation.Keep <fields>;
+}
+
+-keepclasseswithmembers class * {
+    @androidx.annotation.Keep <init>(...);
+}

app/proguard-rules.pro

@@ -1,8 +1,19 @@
 -dontobfuscate
 
--dontwarn eu.kanade.tachiyomi.**
--keep class eu.kanade.tachiyomi.**
--keep class eu.kanade.tachiyomi.source.model.** { *; }
+# Keep extension's common dependencies
+-keep,allowoptimization class eu.kanade.tachiyomi.** { public protected *; }
+-keep,allowoptimization class androidx.preference.** { *; }
+-keep,allowoptimization class kotlin.** { public protected *; }
+-keep,allowoptimization class kotlinx.coroutines.** { public protected *; }
+-keep,allowoptimization class okhttp3.** { public protected *; }
+-keep,allowoptimization class okio.** { public protected *; }
+-keep,allowoptimization class rx.** { public protected *; }
+-keep,allowoptimization class org.jsoup.** { public protected *; }
+-keep,allowoptimization class com.google.gson.** { public protected *; }
+-keep,allowoptimization class com.github.salomonbrys.kotson.** { public protected *; }
+-keep,allowoptimization class com.squareup.duktape.** { public protected *; }
+-keep,allowoptimization class uy.kohesive.injekt.** { public protected *; }
+-keep,allowoptimization class eu.davidea.flexibleadapter.** { public protected *; }
 
 # Design library
 -dontwarn com.google.android.material.**
@@ -43,27 +54,55 @@
     rx.internal.util.atomic.LinkedQueueNode consumerNode;
 }
 
-# ReactiveNetwork
--dontwarn com.github.pwittchen.reactivenetwork.**
-
-## GSON ##
+-dontnote rx.internal.util.PlatformDependent
+##---------------End: proguard configuration for RxJava 1.x  ----------
 
+##---------------Begin: proguard configuration for Gson  ----------
 # Gson uses generic type information stored in a class file when working with fields. Proguard
 # removes such information by default, so configure it to keep all of it.
 -keepattributes Signature
 
-# Gson specific classes
--keep class sun.misc.Unsafe { *; }
+# For using GSON @Expose annotation
+-keepattributes *Annotation*
 
-# Prevent proguard from stripping interface information from TypeAdapterFactory,
+# Gson specific classes
+-dontwarn sun.misc.**
+
+# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
 # JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * extends com.google.gson.TypeAdapter
 -keep class * implements com.google.gson.TypeAdapterFactory
 -keep class * implements com.google.gson.JsonSerializer
 -keep class * implements com.google.gson.JsonDeserializer
 
-# SnakeYaml
--keep class org.yaml.snakeyaml.** { public protected private *; }
--dontwarn org.yaml.snakeyaml.**
+# Prevent R8 from leaving Data object members always null
+-keepclassmembers,allowobfuscation class * {
+  @com.google.gson.annotations.SerializedName <fields>;
+}
+##---------------End: proguard configuration for Gson  ----------
 
-# Duktape
--keep class com.squareup.duktape.** { *; }
+##---------------Begin: proguard configuration for kotlinx.serialization  ----------
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.AnnotationsKt # core serialization annotations
+
+# kotlinx-serialization-json specific. Add this if you have java.lang.NoClassDefFoundError kotlinx.serialization.json.JsonObjectSerializer
+-keepclassmembers class kotlinx.serialization.json.** {
+    *** Companion;
+}
+-keepclasseswithmembers class kotlinx.serialization.json.** {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+-keep,includedescriptorclasses class eu.kanade.tachiyomi.**$$serializer { *; }
+-keepclassmembers class eu.kanade.tachiyomi.** {
+    *** Companion;
+}
+-keepclasseswithmembers class eu.kanade.tachiyomi.** {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+-keep class kotlinx.serialization.**
+-keepclassmembers class kotlinx.serialization.** {
+    <methods>;
+}
+##---------------End: proguard configuration for kotlinx.serialization  ----------