Allow optimization and obfuscation of the SDK by reducing proguard rules

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+### Features
+- Allow optimization and obfuscation of the SDK by reducing proguard rules ([#2031](https://github.com/getsentry/sentry-java/pull/2031))
+
 ### Fixes
 
 - Calling Sentry.init and specifying contextTags now has an effect on the Logback SentryAppender ([#2052](https://github.com/getsentry/sentry-java/pull/2052))

sentry-android-core/proguard-rules.pro

@@ -1,28 +1,25 @@
+##---------------Begin: proguard configuration for android-core  ----------
+
 ##---------------Begin: proguard configuration for androidx.core  ----------
 -keep class androidx.core.view.GestureDetectorCompat { <init>(...); }
 -keep class androidx.core.app.FrameMetricsAggregator { <init>(...); }
 -keep interface androidx.core.view.ScrollingView { *; }
 ##---------------End: proguard configuration for androidx.core  ----------
 
-##---------------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
-
-# For using GSON @Expose annotation
--keepattributes *Annotation*
-
-# Application classes that will be serialized/deserialized
--keep class io.sentry.** { *; }
--keepclassmembers enum io.sentry.** { *; }
--keep class io.sentry.android.core.** { *; }
+##---------------Begin: proguard configuration for androidx.lifecycle  ----------
+-keep interface androidx.lifecycle.DefaultLifecycleObserver { *; }
+-keep class androidx.lifecycle.ProcessLifecycleOwner { <init>(...); }
+##---------------End: proguard configuration for androidx.lifecycle  ----------
 
 # don't warn jetbrains annotations
 -dontwarn org.jetbrains.annotations.**
-
-# R8: Attribute Signature requires InnerClasses attribute. Check -keepattributes directive.
--keepattributes InnerClasses
+# don't warn about missing classes (mainly for Guardsquare's proguard).
+# We are checking for their presence at runtime
+-dontwarn io.sentry.android.timber.SentryTimberIntegration
+-dontwarn io.sentry.android.fragment.FragmentLifecycleIntegration
 
 # To ensure that stack traces is unambiguous
 # https://developer.android.com/studio/build/shrink-code#decode-stack-trace
 -keepattributes LineNumberTable,SourceFile
+
+##---------------End: proguard configuration for android-core  ----------

sentry-android-fragment/proguard-rules.pro

@@ -1,5 +1,10 @@
--keep class io.sentry.android.fragment.** { *; }
+##---------------Begin: proguard configuration for Fragment  ----------
+
+# The Android SDK checks at runtime if this class is available via Class.forName
+-keep class io.sentry.android.fragment.FragmentLifecycleIntegration { <init>(...); }
 
 # To ensure that stack traces is unambiguous
 # https://developer.android.com/studio/build/shrink-code#decode-stack-trace
 -keepattributes LineNumberTable,SourceFile
+
+##---------------End: proguard configuration for Fragment  ----------

sentry-android-ndk/proguard-rules.pro

@@ -1,6 +1,10 @@
 ##---------------Begin: proguard configuration for NDK  ----------
 
--keep class io.sentry.android.ndk.** { *; }
+# The Android SDK checks at runtime if this class is available via Class.forName
+-keep class io.sentry.android.ndk.SentryNdk { *; }
+# The JNI layer uses this classes through reflection
+-keep class io.sentry.android.core.SentryAndroidOptions { *; }
+-keep class io.sentry.protocol.DebugImage { *; }
 
 # For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
 -keepclasseswithmembernames,includedescriptorclasses class * {

sentry-android-okhttp/proguard-rules.pro

@@ -1,23 +1,13 @@
 ##---------------Begin: proguard configuration for OkHttp  ----------
 
--keep class io.sentry.android.okhttp.** { *; }
-
 # To ensure that stack traces is unambiguous
 # https://developer.android.com/studio/build/shrink-code#decode-stack-trace
 -keepattributes LineNumberTable,SourceFile
 
-# https://square.github.io/okhttp/r8_proguard/
-# JSR 305 annotations are for embedding nullability information.
--dontwarn javax.annotation.**
-
-# A resource is loaded with a relative path so the package of this class must be preserved.
--keepnames class okhttp3.internal.publicsuffix.PublicSuffixDatabase
-
-# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
--dontwarn org.codehaus.mojo.animal_sniffer.*
-
-# OkHttp platform used only on JVM and when Conscrypt dependency is available.
--dontwarn okhttp3.internal.platform.ConscryptPlatform
--dontwarn org.conscrypt.ConscryptHostnameVerifier
+# https://square.github.io/okhttp/features/r8_proguard/
+# If you use OkHttp as a dependency in an Android project which uses R8 as a default compiler you
+# don’t have to do anything. The specific rules are already bundled into the JAR which can
+# be interpreted by R8 automatically.
+# https://raw.githubusercontent.com/square/okhttp/master/okhttp/src/jvmMain/resources/META-INF/proguard/okhttp3.pro
 
 ##---------------End: proguard configuration for OkHttp  ----------

sentry-android-timber/proguard-rules.pro

@@ -1,6 +1,7 @@
 ##---------------Begin: proguard configuration for Timber  ----------
 
--keep class io.sentry.android.timber.** { *; }
+# The Android SDK checks at runtime if this class is available via Class.forName
+-keep class io.sentry.android.timber.SentryTimberIntegration { <init>(...); }
 
 # To ensure that stack traces is unambiguous
 # https://developer.android.com/studio/build/shrink-code#decode-stack-trace

sentry-samples/sentry-samples-android/proguard-rules.pro

@@ -12,10 +12,24 @@
 #   public *;
 #}
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# To ensure that stack traces is unambiguous
+# https://developer.android.com/studio/build/shrink-code#decode-stack-trace
+-keepattributes LineNumberTable,SourceFile
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+
+# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
+-keepclasseswithmembernames,includedescriptorclasses class * {
+    native <methods>;
+}
+
+# Please add these rules to your existing keep rules in order to suppress warnings.
+# This is generated automatically by the Android Gradle plugin.
+-dontwarn org.bouncycastle.jsse.BCSSLParameters
+-dontwarn org.bouncycastle.jsse.BCSSLSocket
+-dontwarn org.bouncycastle.jsse.provider.BouncyCastleJsseProvider
+-dontwarn org.conscrypt.Conscrypt$Version
+-dontwarn org.conscrypt.Conscrypt
+-dontwarn org.conscrypt.ConscryptHostnameVerifier
+-dontwarn org.openjsse.javax.net.ssl.SSLParameters
+-dontwarn org.openjsse.javax.net.ssl.SSLSocket
+-dontwarn org.openjsse.net.ssl.OpenJSSE