version = "1.0"

repositories {
    mavenCentral()
}

dependencies {
    implementation("org.scala-lang:scala-library:2.13.12")
    testImplementation("junit:junit:4.13")
}

// tag::custom-source-locations[]
sourceSets {
    main {
        scala {
            setSrcDirs(listOf("src/scala"))
        }
    }
    test {
        scala {
            setSrcDirs(listOf("test/scala"))
        }
    }
}

        when:
        applyPluginToProjects()
        project.apply(plugin: 'java')

        project.sourceSets.main.output.dir 'generated-folder'
        project.sourceSets.main.output.dir 'ws-generated'

        project.sourceSets.test.output.dir 'generated-test'
        project.sourceSets.test.output.dir 'test-resources'

        then:
        def runtime = project.ideaModule.module.singleEntryLibraries.RUNTIME

plugins {
    `java-library`
    `java-test-fixtures`
    groovy
    id("gradlebuild.dependency-modules")
}

// The below mimics what the java-library plugin does, but creating a library of test fixtures instead.

sourceSets.matching { it.name.endsWith("Test") }.all {
    // the 'test' (with lower case 't') source set is already configured to use test fixtures by the JavaTestFixturesPlugin

}

version = "1.0"

val buildInfo by tasks.registering(BuildInfo::class) {
    version = project.version.toString()
    outputFile = layout.buildDirectory.file("generated-resources/build-info.properties")
}

sourceSets {
    main {
        output.dir(buildInfo.map { it.outputFile.asFile.get().parentFile })
    }

    testImplementation("junit:junit:4.13")
}

configurations {                            // <1>
    implementation {
        resolutionStrategy.failOnVersionConflict()
    }
}

sourceSets {                                // <2>
    main {                                  // <3>
        java.srcDir("src/core/java")
    }
}

java {                                      // <4>

plugins {
    id 'java'
}

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'junit:junit:4.13'
}

// tag::define-main[]
sourceSets {
    main {
        java {
            srcDirs = ['src/java']
        }
        resources {
            srcDirs = ['src/resources']
        }
    }
// end::define-main[]
    test {
        java {
            srcDir 'test/java'
        }

}

// tag::customExec[]
task('runOn17', type: JavaExec) {
    javaLauncher = javaToolchains.launcherFor {
        languageVersion = JavaLanguageVersion.of(17)
    }

    classpath = sourceSets.main.runtimeClasspath
    mainClass = application.mainClass
}

            public Map<String, FileCollection> call() {
                SourceSetContainer sourceSets = project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets();
                singleEntryLibraries.putIfAbsent("RUNTIME", sourceSets.getByName("main").getOutput().getDirs());
                singleEntryLibraries.putIfAbsent("TEST", sourceSets.getByName("test").getOutput().getDirs());
                return singleEntryLibraries;

}

// tag::customExec[]
tasks.register<JavaExec>("runOn17") {
    javaLauncher = javaToolchains.launcherFor {
        languageVersion = JavaLanguageVersion.of(17)
    }

    classpath = sourceSets["main"].runtimeClasspath
    mainClass = application.mainClass
}

        filter { it.plugins.hasPlugin(JavaBasePlugin::class.java) }

    private
    fun Sequence<Project>.allSourceSetsRoots() =
        flatMap { it.sourceSets.flatMap { it.allSource.srcDirs }.asSequence() }

    private
    val Project.sourceSets
        get() = the<SourceSetContainer>()
}


@CacheableTask
abstract class GenerateSourceRootsFile : DefaultTask() {

    @get:Input