build.gradle

apply plugin: 'scala'
apply plugin: 'com.github.johnrengelman.shadow'

buildscript {
  repositories {
    flatDir dirs: System.getProperty("user.home") + '/bin/proguard6.0.3/lib/'
    jcenter()
  }

  dependencies {
    classpath ':proguard'
    classpath 'com.github.jengelman.gradle.plugins:shadow:5.+'
  }
}

import proguard.gradle.ProGuardTask

ext.mainClassName = rootProject.name
ext.version = '1.1.1'
ext.jarName = "${name}-bin"

allprojects {
  repositories {
    jcenter()
  }
}

jar {
  manifest.attributes 'Main-Class': mainClassName
}

shadowJar {
  classifier = 'bin'
  archiveName = rootProject.name
  version = version
}

dependencies {
  implementation "org.scala-lang:scala-library:2.11.+"
  implementation "com.github.kevinsawicki:http-request:6.+"
  implementation "com.eclipsesource.minimal-json:minimal-json:0.9.+"
  testImplementation "org.scalatest:scalatest_2.11:3.+"
}

task proguard(type: ProGuardTask) {
  injars "./build/libs/${jarName}.jar".intern()
  outjars "./build/libs/${jarName}-mini.jar".intern()
  libraryjars "${System.getProperty('java.home')}/lib/rt.jar".intern()

  dontwarn
  dontnote
  ignorewarnings

  keepattributes 'SourceFile, LineNumberTable'

  keepclasseswithmembers 'public class * { \
    public static void main(java.lang.String[]); \
  }'
}

task debugInfoProguard(type: ProGuardTask) {
  proguard.doFirst { dontobfuscate }
}