plugins {
    id 'myproject.java-conventions'
    id 'java-library'
}

dependencies {
    api project(':list')

plugins {
    id 'myproject.java-conventions'
    id 'java-library'
}

dependencies {
    api project(':list')

Concretely, we add a _convention plugin_ in `buildSrc` to share the setup between multiple subprojects:

====
include::sample[dir="kotlin",files="buildSrc/src/main/kotlin/myproject.java-conventions.gradle.kts[tags=toolchain]"]
include::sample[dir="groovy",files="buildSrc/src/main/groovy/myproject.java-conventions.gradle[tags=toolchain]"]
====

// tag::plugins[]
plugins {
    id 'myproject.java-conventions'
    id 'groovy-gradle-plugin'
}

plugins {
    id("myproject.java-conventions")
    application
}

dependencies {
    implementation(project(":utilities"))
}

application {
    mainModule = "org.gradle.sample.app"
    mainClass = "org.gradle.sample.app.Main"

plugins {
    id("myproject.publishing-conventions")
}

description = "The second project"

dependencies {
    implementation("commons-collections:commons-collections:3.2.2")

// tag::plugins[]
plugins {
    id 'myproject.java-conventions'
    id 'java-library'
}
// end::plugins[]

dependencies {
    api project(':list')

plugins {
    id 'myproject.java-conventions'
    id 'application'
}

dependencies {
    implementation project(':list')
    implementation project(':utilities')
}

application {
    mainClass = 'org.gradle.sample.Main'

plugins {
    id("myproject.java-conventions")
    application
    id("test-report-aggregation") // <1>
}

dependencies {
    implementation(project(":list"))
    implementation(project(":utilities"))
}

application {
    mainClass = "org.gradle.sample.Main"
}

tasks.check {
    dependsOn(tasks.named<TestReport>("testAggregateTestReport")) // <2>

plugins {
    id 'myproject.java-conventions'
    id 'java-library'
}

// tag::customToolchain[]
tasks.withType(JavaCompile).configureEach {
    javaCompiler = javaToolchains.compilerFor {
        languageVersion = JavaLanguageVersion.of(8)
    }
}

task('testsOn17', type: Test) {
    javaLauncher = javaToolchains.launcherFor {
        languageVersion = JavaLanguageVersion.of(17)
    }
}