gradle-j2cl-plugin

This plugin provides tasks and project conventions for building J2CL projects with Gradle.

Requirements

This plugin requires using at least Gradle 6.6.

Building the project

Building the project currently requires that you separately checkout and build J2CL itself.

You need to build the following targets:

bazel build //transpiler/java/com/google/j2cl/transpiler:J2clCommandLineRunner_deploy.jar
bazel build //tools/java/com/google/j2cl/tools/gwtincompatible:GwtIncompatibleStripper_deploy.jar
bazel build //jre/java:jre //jre/java:jre_bootclasspath
bazel build //junit/emul/java:junit_emul //junit/generator/java/com/google/j2cl/junit/...
# Must be last, as it actually only sets up the execroot
bazel build $(bazel query 'filter('closure_.*', //third_party/...)')

Once this is done, you can build the plugin with Gradle, passing the path to the J2CL project root as a j2cl-project-root Gradle property:

./gradlew -Pj2cl-project-root="<path to J2CL project root>" build

Instead of passing it to each Gradle execution, you can set it up once and for all in your ~/.gradle/gradle.properties:

j2cl-project-root=<path to J2CL project root>

The plugin is currently tested/exercized using sample projects in the samples/ folder. Switch to a sample's folder then build it, this will automatically build the plugin as a composite build.