internal
val Project.settings
    get() = (gradle as GradleInternal).settings


internal
val Project.scriptCompilationClassPath
    get() = compilationClassPathOf((this as ProjectInternal).classLoaderScope)


private
fun Project.compilationClassPathOf(classLoaderScope: ClassLoaderScope) =
    serviceOf<KotlinScriptClassPathProvider>().safeCompilationClassPathOf(classLoaderScope, true) {

                )
            } doAnswer {
                it.getArgument<(File) -> Unit>(4).invoke(stage2CacheDir)
                stage2CacheDir
            }

            on { compilationClassPathOf(any()) } doAnswer { testRuntimeClassPath }
            on { hashOf(eq(testRuntimeClassPath)) } doReturn compilationClassPathHash

            on { accessorsClassPathFor(any()) } doReturn accessorsClassPath

                .get()
        } catch (e: CacheOpenException) {
            throw e.cause as? ScriptCompilationException ?: e
        }

        override fun compilationClassPathOf(classLoaderScope: ClassLoaderScope): ClassPath =
            classPathProvider.compilationClassPathOf(classLoaderScope)

        override fun loadClassInChildScopeOf(
            classLoaderScope: ClassLoaderScope,
            childScopeId: String,

            accessorsClassPath: ClassPath,
            initializer: (File) -> Unit
        ): File

        fun startCompilerOperation(
            description: String
        ): AutoCloseable

        fun compilationClassPathOf(
            classLoaderScope: ClassLoaderScope
        ): ClassPath

        /**
         * Provides an additional [ClassPath] to be used in the compilation of a top-level [Project] script

        });
    }

    private File getKotlinDslExtensionsJar() {
        return getOnlyElement(
            getKotlinScriptClassPathProvider()
                .compilationClassPathOf(getInputClassLoaderScope())
                .getAsFiles()
                .stream()
                .filter(file -> file.getName().startsWith("gradle-kotlin-dsl-extensions"))
                .collect(toList())

     */
    private
    val gradleImplementationClassPath: Set<File> by lazy {
        cachedClassLoaderClassPath.of(coreAndPluginsScope.exportClassLoader)
    }

    fun compilationClassPathOf(scope: ClassLoaderScope): ClassPath =
        cachedScopeCompilationClassPath.computeIfAbsent(scope, ::computeCompilationClassPath)

    private

            cacheDir.mkdirs()
            initializer(cacheDir)
        }

        override fun compilationClassPathOf(classLoaderScope: ClassLoaderScope): ClassPath =
            scriptCompilationClassPath

        override fun stage1BlocksAccessorsFor(scriptHost: KotlinScriptHost<*>): ClassPath =
            ClassPath.EMPTY

}


private
fun GradleInternal.baseScriptClassPath(): ClassPath {
    return serviceOf<KotlinScriptClassPathProvider>()
        .compilationClassPathOf(baseProjectClassLoaderScope())
}


private
fun ProjectInternal.gradleSourceRoots() =
    gradle.gradleHomeDir?.let { SourcePathProvider.sourceRootsOf(it, SourceDistributionResolver(this)) } ?: emptyList()