Awesome

JWebAssembly Gradle Plugin

This is a Gradle plugin for the JWebAssembly compiler. A Java bytecode to WebAssembly converter. It produce the WASM and JavaScript file from your *.java, *.class and/or *.jar files.

Usage

This plugin use the Java plugin to compile your Java sources to class files first.

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'gradle.plugin.de.inetsoftware:jwebassembly-gradle:+'
    }
}

apply plugin: 'de.inetsoftware.jwebassembly'

// declare your Java sources like you do it for your other Java projects
sourceSets {
    main {
        java {
            srcDir 'src'
        }
    }
}

wasm {
    format = 'Text'        // possible values are 'Text' and 'Binary'. 'Binary' is the default value.
    compilerVersion = 0.2  // specify a compiler version, default is '+'
    classpath = files(...) // specify libraries, default is sourceSet.compileClasspath
}

For a more completely description look into the wiki documentation.