@get:InputFiles
    abstract val inputSummaries: ConfigurableFileCollection

    @get:OutputFile
    abstract val outputFile: RegularFileProperty

    @TaskAction
    fun summarize() {
        outputFile.get().asFile.run {
            parentFile.mkdirs()
            writeText(summaryString())
        }
    }

    private

import org.gradle.api.tasks.LocalState
import org.gradle.api.tasks.Nested
import org.gradle.api.tasks.Optional
import org.gradle.api.tasks.OutputDirectories
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.OutputFile
import org.gradle.build.event.BuildEventsListenerRegistry
import org.gradle.integtests.fixtures.AbstractIntegrationSpec
import org.gradle.integtests.fixtures.ToBeFixedForConfigurationCache

        1,
        2,
    ],
    compat_init_templates = [
        "compat_template_v1.__init__.py",
        "compat_template.__init__.py",
    ],
    output_dir = "_api/v1/",
    output_files = TENSORFLOW_API_INIT_FILES_V1,
    output_package = "tensorflow._api.v1",
    packages_to_ignore = ["tensorflow.python.framework.test_ops"],
    root_file_name = "v1.py",

        assertEquals("test.html", pom.getValue("reporting/plugins[1]/configuration/outputFile"));
        assertEquals(1, ((List<?>) pom.getValue("reporting/plugins[1]/reportSets")).size());
        assertEquals("it", pom.getValue("reporting/plugins[1]/reportSets[1]/id"));
        assertEquals("index.html", pom.getValue("reporting/plugins[1]/reportSets[1]/configuration/outputFile"));

			if file.FileInfo().IsDir() {
				return os.MkdirAll(extractedFilePath, file.Mode())
			}
			outputFile, err := os.OpenFile(extractedFilePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode())
			if err != nil {
				return err
			}
			defer outputFile.Close()
			_, err = io.Copy(outputFile, zippedFile)
			return err
		}()
		if err != nil {
			return err
		}
	}
	return nil

Using a reliable, single source of truth, such as a task or shared project property, is better.
In the following modified example, we use a report task defined elsewhere that has the report's location stored in its `outputFile` property:

====
include::sample[dir="snippets/files/copy/kotlin",files="build.gradle.kts[tags=copy-single-file-example-with-task-properties]"]