Add rules for Proguard

CHANGELOG.md

@@ -13,12 +13,15 @@
   - Added support for converting multipage into a group of files.
   - Added `default_effects` field in `UploadcareFile`.
   - Added react to request throttling (429 code response).
+  - Added rules for Proguard.
 - Widget:
   - SocialApi doesn't use `GET /sources` method anymore.
+  - Added rules for Proguard.
 - Project:
   - Migrated Gradle builds from Groovy to Kotlin.
 - Example:
   - Removed sorting options by file size from `UploadFragment`.
+  - Enable R8 shrinking code for release build.
 
 ## 3.3.0
 - Library:

build.gradle.kts

@@ -3,6 +3,7 @@
 buildscript {
     repositories {
         maven(url = "https://maven.google.com")
+        maven(url = "https://storage.googleapis.com/r8-releases/raw")
         google()
         mavenCentral()
     }
@@ -12,6 +13,10 @@ buildscript {
         classpath("com.android.tools.build:gradle:${libs.versions.gradleVersion.get()}")
         classpath(libs.kotlin.plugin)
         classpath(libs.navigation.safe.args.plugin)
+
+        // Required to support for sealed classes until AGP 8.2
+        // https://issuetracker.google.com/issues/227160052#comment37
+        classpath(libs.tools.r8)
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

example/build.gradle.kts

@@ -24,7 +24,7 @@ android {
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
             proguardFiles(getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro")
         }
     }

gradle/libs.versions.toml

@@ -24,6 +24,7 @@ moshi = "1.15.0"
 junit = "4.13.2"
 testRunner = "1.5.2"
 espressoCore = "3.5.1"
+r8 = "8.2.36"
 
 [libraries]
 kotlin-plugin = { group = "org.jetbrains.kotlin", name = "kotlin-gradle-plugin", version.ref = "kotlinVersion" }
@@ -67,3 +68,5 @@ preference-ktx = { group = "androidx.preference", name = "preference-ktx", versi
 test-runner = { group = "androidx.test", name = "runner", version.ref = "testRunner" }
 test-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
 test-junit = { group = "junit", name = "junit", version.ref = "junit" }
+
+tools-r8 = { module = "com.android.tools:r8", version.ref = "r8" }

library/build.gradle.kts

@@ -19,8 +19,9 @@ android {
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
             proguardFiles(getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro")
+            consumerProguardFile("proguard-rules.pro")
         }
     }
     packaging {

library/proguard-rules.pro

@@ -15,3 +15,12 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+-dontwarn java.lang.invoke.StringConcatFactory
+
+-keep class com.uploadcare.android.library.data.** { *; }
+-keep class com.uploadcare.android.library.api.Project { *; }
+-keep class com.uploadcare.android.library.api.UploadcareCopyFile { *; }
+-keep class com.uploadcare.android.library.api.UploadcareFile { *; }
+-keep class com.uploadcare.android.library.api.UploadcareGroup { *; }
+-keep class com.uploadcare.android.library.api.UploadcareWebhook { *; }

widget/build.gradle.kts

@@ -27,9 +27,10 @@ android {
             buildConfigField("String", "SOCIAL_API_ENDPOINT", "\"https://social.uploadcare.com/\"")
         }
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
             buildConfigField("String", "SOCIAL_API_ENDPOINT", "\"https://social.uploadcare.com/\"")
             proguardFiles(getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro")
+            consumerProguardFile("proguard-rules.pro")
         }
     }
 

widget/proguard-rules.pro

@@ -15,3 +15,21 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+-keep class com.uploadcare.android.widget.data.** { *; }
+
+# Keep inherited services.
+-if interface * { @retrofit2.http.* <methods>; }
+-keep,allowobfuscation interface * extends <1>
+
+# With R8 full mode generic signatures are stripped for classes that are not
+# kept. Suspend functions are wrapped in continuations where the type argument
+# is used.
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+
+# R8 full mode strips generic signatures from return types if not kept.
+-if interface * { @retrofit2.http.* public *** *(...); }
+-keep,allowoptimization,allowshrinking,allowobfuscation class <3>
+
+# With R8 full mode generic signatures are stripped for classes that are not kept.
+-keep,allowobfuscation,allowshrinking class retrofit2.Response