build.gradle

buildscript {
  ext {
    kotlinVersion = "1.1.3-2"
    kodeinVersion = "4.1.0"
  }
  repositories {
  	mavenCentral()
  }
  dependencies {
  	classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
  }
}

group = "me.ccampo"
version = "0.1.0"

apply plugin: "kotlin2js"

repositories {
  mavenCentral()
}

dependencies {
  compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlinVersion"
  //compile "com.github.salomonbrys.kodein:kodein-js:$kodeinVersion"
}

compileKotlin2Js {
  kotlinOptions.metaInfo = true
  kotlinOptions.outputFile = "$project.buildDir.path/web/lib/nbody.js"
  kotlinOptions.sourceMap = true
  kotlinOptions.main = "call"
}

build.doLast {
  configurations.compile.each { File file ->
    copy {
      includeEmptyDirs = false

      from zipTree(file.absolutePath)
      into "${project.buildDir}/web/lib"
      include { fileTreeElement ->
        final path = fileTreeElement.path
        path.endsWith(".js") && (path.startsWith("META-INF/resources/") || !path.startsWith("META-INF/"))
      }
    }
  }

  copy {
    from "src/main/webapp"
    into "${project.buildDir}/web"
  }
}