Configure minify task using proguard

build.gradle.kts

@@ -34,6 +34,7 @@ buildscript {
         classpath("com.android.tools.build:gradle:4.1.3")
         classpath("ru.vyarus:gradle-animalsniffer-plugin:1.5.3")
         classpath(files("briar/libs/gradle-witness.jar"))
+        classpath("com.guardsquare:proguard-gradle:7.2.0")
     }
 
     // keep version here in sync when updating briar
@@ -116,6 +117,19 @@ tasks.jar {
     exclude("META-INF/BC2048KE.RSA", "META-INF/BC2048KE.SF", "META-INF/BC2048KE.DSA")
 }
 
+tasks.register<proguard.gradle.ProGuardTask>("minify") {
+    val packageUberJarForCurrentOS by tasks.getting
+    dependsOn(packageUberJarForCurrentOS)
+    val files = packageUberJarForCurrentOS.outputs.files
+    injars(files)
+    outjars(files.map { file -> File(file.parentFile, "${file.nameWithoutExtension}.min.jar") })
+
+    val library = if (System.getProperty("java.version").startsWith("1.")) "lib/rt.jar" else "jmods"
+    libraryjars("${System.getProperty("java.home")}/$library")
+
+    configuration("proguard-rules.pro")
+}
+
 compose.desktop {
     application {
         mainClass = "org.briarproject.briar.desktop.MainKt"

proguard-rules.pro

+-dontoptimize
+-dontobfuscate
+-keepkotlinmetadata
+
+-dontwarn kotlinx.**
+-dontwarn ch.qos.logback.**
+-dontwarn com.sun.jna.**
+-dontwarn okhttp3.**
+-dontwarn okio.**
+-dontwarn org.h2.**
+-dontwarn org.slf4j.**
+
+-dontwarn javax.servlet.**
+-dontwarn org.jaxen.**
+-dontwarn com.vividsolutions.jts.**
+-dontwarn com.ibm.oti.**
+-dontwarn com.sun.cdc.**
+-dontwarn org.codehaus.janino.**
+-dontwarn javax.mail.**
+-dontwarn org.apache.log4j.**
+-dontwarn android.**
+-dontwarn org.conscrypt.**
+-dontwarn org.apache.lucene.**
+-dontwarn org.osgi.**
+
+# wildcard, use if above doesn`t suffice
+#-ignorewarnings
+
+-keepdirectories **
+-keep class org.briarproject.**
+-keepattributes InnerClasses
+-keepclasseswithmembers public class org.briarproject.briar.desktop.MainKt {
+    public static void main(java.lang.String[]);
+}
+-keep class org.whispersystems.curve25519.**
+-keep class org.jetbrains.skia.** { *; }
+-keep class org.jetbrains.skiko.** { *; }
+-keep class com.ibm.icu.text.MessageFormat
+-keep class com.ibm.icu.text.MessagePattern$ApostropheMode {*;}
+
+-keep class org.h2.** { *; }
+-keep class org.slf4j.** { *; }
+-keep class ch.qos.logback.** { *; }
+
+-keep class com.sun.jna.** { *; }
+-keep class * implements com.sun.jna.** { *; }