Moderne licensed

Upgrade Kotlin `jvmTarget` to match the Java version

Recipe IDorg.openrewrite.java.migrate.UpgradeKotlinJvmTargetVersionArtifactorg.openrewrite.recipe:rewrite-migrate-java

Align the Kotlin jvmTarget with the project's Java version so the Kotlin compiler emits bytecode at the same level as javac. Covers kotlin-maven-plugin <jvmTarget> configuration and the Gradle kotlinOptions { jvmTarget = ... } / compilerOptions { jvmTarget = ... } blocks (Groovy and Kotlin DSL). Will not downgrade if the existing Kotlin target is higher than the requested version.

Single recipeMSAL

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("org.openrewrite.java.migrate.UpgradeKotlinJvmTargetVersion")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-migrate-java:3.45.0")
}

Then run

./gradlew rewriteRun

This recipe has required options, which a build sets in a rewrite.yml recipe that you activate instead.

Usage

You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.java.migrate.UpgradeKotlinJvmTargetVersion --recipe-option "version=21"

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-migrate-java:RELEASE

Options

Name	Type	Description
`version`required	`Integer`	The Java version to align Kotlin's `jvmTarget` with. e.g. `21`

Data tables

Structured output this recipe can produce.

Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats