proguard

使用 proguard 可以幫忙混淆 decompiler 出來的 class 檔，

在 {project}/project 底下加上 plugins.sbt 內容為

addSbtPlugin("com.lightbend.sbt" % "sbt-proguard" % "0.3.0")

在 build.sbt 依造需要的 option、filter 及 Merge 方式設定，如下 :

enablePlugins(SbtProguard)
proguardOptions in Proguard += "-dontoptimize"
proguardOptions in Proguard ++= Seq("-dontnote", "-dontwarn", "-ignorewarnings","-keepattributes Signature,*Annotation*","-keep class scala.** { *; }","-keep class com.** { *; }","-keep class org.** { *; }")
proguardInputs in Proguard := (dependencyClasspath in Compile).value.files
proguardFilteredInputs in Proguard ++= ProguardOptions.noFilter((packageBin in Compile).value)
proguardOptions in Proguard += ProguardOptions.keepMain("ght.**")
​
javaOptions in (Proguard, proguard) := Seq("-Xmx4G")
​
proguardMerge in Proguard := true
proguardMergeStrategies in Proguard += ProguardMerge.last("javax.inject-2.4.0-b34.jar")
proguardMergeStrategies in Proguard += ProguardMerge.last("io/netty/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("org/apache/commons/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("org/apache/hadoop/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("org/apache/spark/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("org/aopalliance/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("javax/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.last("java/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.discard("META-INF/.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.discard("git.properties")
proguardMergeStrategies in Proguard += ProguardMerge.rename("LICENSE.*".r)
proguardMergeStrategies in Proguard += ProguardMerge.discard("rootdoc.txt")

下指令 build jar

sbt proguard:proguard

參考資料
sbt-proguard