private
    fun signatureOf(method: JavaMethod): String =
        method.parameters.joinToString(separator = ",") { p ->
            if (p.isVarArgs || p.javaClass.isArray) "${p.type.binaryName}[]"
            else p.type.binaryName
        }

    private
    fun commaSeparatedParameterNamesOf(method: JavaMethod) =
        method.parameters.joinToString(separator = ",") { it.name }

    private

mkdir -p test-splits
rm -rf test-splits/*-test-classes.properties
cat > test-splits/$action-test-classes.properties << EOL
${testClasses.joinToString("\n")}
EOL
echo "Tests to be ${action}d in this build"
cat test-splits/$action-test-classes.properties
"""

    val linesWithEcho = testClasses.joinToString("\n") { "echo $it" }

    val windowsScript = """
mkdir test-splits
del /f /q test-splits\include-test-classes.properties

                if (list.isNotEmpty()) {
                    append("  $name (").append(list.size).append(")\n")
                    append(list.joinToString(separator = "\n    ", prefix = "    ", postfix = "\n"))
                }
            }
        }.toString()

                ).joinToString(separator = " ")
            skipConditionally()
        }
    }

    fun BuildSteps.adHocPerformanceTest(tests: List<String>) {
        gradleStep(
            listOf(
                "clean",
                "performance:${testProject}PerformanceAdHocTest",
                tests.map { """--tests "$it"""" }.joinToString(" "),

            return
        }
        var replacementsCount = 0
        // readLines eats EOLs, so we need to use postfix to make sure the last line ends with EOL too.
        writeBytes(readLines().joinToString(separator = separator, postfix = separator) { line ->
            when {
                // We assume that the declaration is not empty.
                line.startsWith("DEFAULT_JVM_OPTS='") && line.endsWith('\'') -> {

                        override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                            val entryName = dir.relativize(file).joinToString(separator = "/") { it.toString() }
                            jarStream.putNextEntry(JarEntry(entryName))
                            Files.copy(file, jarStream)
                            jarStream.closeEntry()

            tasks = "resolveAllDependencies"
            gradleParams = (
                buildToolGradleParameters(isContinue = false) + listOf("--dependency-verification", "lenient")
                ).joinToString(separator = " ")
        }
    }

private
fun ParameterNamesSupplier.parameterNamesFor(typeName: String, functionName: String, parameterTypeNames: List<String>): List<String>? =
    this("$typeName.$functionName(${parameterTypeNames.joinToString(",")})")


/**
 * Provides [ApiType] instances by Kotlin source name from a class path.
 *
 * Keeps JAR files open for fast lookup, must be closed.

        buildToolGradleParameters(daemon, maxParallelForks = maxParallelForks) +
            listOf(extraParameters) +
            buildScanTags.map { buildScanTag(it) } +
            functionalTestParameters(os)
        ).joinToString(separator = " ")

    steps {
        gradleWrapper(this@gradleRunnerStep) {
            name = stepName
            tasks = "clean $gradleTasks"
            gradleParams = parameters

    fun String.withTrimmableMargin(): String =
        lines().joinToString(separator = "\n        |")

    private
    fun groovyImports(): String {
        val imports: List<String> =
            generateImportPackages()
                .map { "$it.*" } + "" +
                AnnotationGenerator.ADDITIONAL_DEFAULT_IMPORTS
        return imports.joinToString(separator = "\n") {
            if (it.isBlank()) "" else "import $it"