Gradle Build Tool

A plugin that enables the use of SBTs most recent compilers in Gradle Scala projects.

Installation

GBT is published as a Gradle plugin via plugins.gradle.org:

plugins {
    id 'com.github.bhuemer.gbt' version '0.2'
}

// By default it will use Scala 2.13.8, but you can configure the version.
scalac {
    scalaVersion '2.13.8'
}

// The plugin needs to be able to resolve SBT and Scala library/compiler 
// JARs as dependencies. You can use whatever repository you prefer though.
repositories {
    jcenter()
}

dependencies {
    // The plugin neither infers the Scala version from this dependency nor 
    // will it add it automatically for you. If you don't have it declared
    // compilation will fail.
    implementation 'org.scala-lang:scala-library:2.13.8'
}

Configuration

Similar to the built-in Scala plugin this one mostly depends on Zinc for the actual compilation. The plugin will automatically resolve the correct compiler bridges for you based on the scalaVersion you have provided, but in more complicated cases you can also specify those manually. For example, this is how you would configure a build.gradle file for Scala 3:

plugins {
    id 'com.github.bhuemer.gbt' version '0.2'
}

scalac {
    scalaVersion = '3.0.2'
}

repositories {
    mavenCentral()
}

dependencies {
    implementation "org.scala-lang:scala3-library_3:3.0.2"
}

Next steps

• Actually implement / make use of incremental compilation. At the moment this plugin just uses the RawCompiler as I wanted to sort out classpath and project set-up issues first before tackling incremental compilation.
• Scaladoc generation task
• Better configuration for the compiler (e.g. allowing users to pass all the various language feature flags)