lib/build.gradle

buildscript {
    repositories {
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'
        classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.0'
    }
}

apply plugin: 'java'

repositories {
    mavenCentral()

    maven {
        url "http://srdjan.mtv:8081/nexus/content/repositories/test_repo/"
    }
}

dependencies {
    compile 'io.v:vanadium:0.1-SNAPSHOT'
    compile group: 'com.google.guava', name: 'guava', version: '18.0'
    testCompile group: 'junit', name: 'junit', version: '4.12'
    testCompile group: 'com.google.truth', name: 'truth', version: '0.25'
}

class VanadiumEnvironment {
    File v23Root;
    File v23Bin;

    public static getVanadiumEnvironment() {
        VanadiumEnvironment result = new VanadiumEnvironment()

        if (!System.getenv().containsKey('V23_ROOT')) {
            throw new InvalidUserDataException("V23_ROOT is not set. "
                    + "Please follow the Vanadium installation instructions at "
                    + "https://v.io/installation/index.html")
        }

        result.v23Root = new File(System.getenv()['V23_ROOT'])
        result.v23Bin = new File(result.v23Root, ['devtools', 'bin', 'v23'].join(File.separator))
        if (!result.v23Bin.exists() || !result.v23Bin.isFile() || !result.v23Bin.canExecute()) {
            throw new InvalidUserDataException(
                    result.v23Bin.toString() + " does not exist or is not an executable file. "
                    + "Please follow the Vanadium installation instructions at "
                    + "https://v.io/installation/index.html")
        }
        return result
    }
}

def v23Root = VanadiumEnvironment.getVanadiumEnvironment().v23Root.getAbsolutePath()
def v23Bin = VanadiumEnvironment.getVanadiumEnvironment().v23Bin.getAbsolutePath()
def vdlBin = [v23Root, 'release', 'go', 'bin', 'vdl'].join(File.separator)
def vdlPath = [ [v23Root, 'roadmap', 'go', 'src'].join(File.separator),
                [v23Root, 'release', 'go', 'src'].join(File.separator) ].join(":")

sourceSets.main.java.srcDirs += 'generated-src/vdl'

task buildVdlTool(type: Exec) {
    commandLine v23Bin, 'go', 'install', 'v.io/x/ref/cmd/vdl'
}

task generateVdl(type: Exec, dependsOn: buildVdlTool) {
    environment VDLPATH: vdlPath
    commandLine vdlBin, 'generate', '--lang=java', '--java-out-dir=generated-src/vdl', 'all'
}

tasks.'compileJava'.dependsOn(generateVdl)