destinationFile.get().asFile.let {
            if (sources.isEmpty) it.writeText("")
            else generateParameterNamesResource(sources.files, classpath.files, it)
        }

    private
    fun generateParameterNamesResource(sources: Set<File>, classpath: Set<File>, destinationFile: File) {
        val index = extractParameterNamesIndexFrom(sources, classpath)
        destinationFile.parentFile.mkdirs()

        given:
        String content = TextUtil.normaliseLineSeparators(
"""            sources {
                cpp {
                    lib library: "hello"
                }
            }""")
        when:
        def actual = UserGuideTransformTask.normalise(content)

        then:
        actual ==
"""sources {
    cpp {
        lib library: "hello"
    }
}"""
    }

     */
    public abstract ConfigurableFileCollection getCssFiles();

    /**
     * The source code to be documented. This should be the "public" APIs.
     */
    public abstract ConfigurableFileCollection getDocumentedSource();

    /**
     * Source code root folders. Java, Groovy & Kotlin public API sources, including
     * generated code.
     */
    public abstract ConfigurableFileCollection getSourceRoots();

        )

    /**
     * Runs the binary compatibility check against two source trees.
     *
     * The fixture build supports both Java and Kotlin sources.
     *
     * @param v1 sources producer for V1, receiver is the `src/main` directory
     * @param v2 sources producer for V2, receiver is the `src/main` directory
     * @param block convenience block invoked on the result
     * @return the check result
     */

        task.sources(patternSet -> patternSet.include("userguide_single.adoc"));

        // TODO: This breaks the provider
        task.setSourceDir(extension.getUserManual().getStagedDocumentation().get().getAsFile());

        Map<String, Object> attributes = new HashMap<>();
        attributes.put("source-highlighter", "coderay");
        attributes.put("toc", "macro");

    }

    protected boolean isOverride(JApiMethod method) {
        // No point in parsing the source file if the method is not there any more.
        if (method.changeStatus == JApiChangeStatus.REMOVED) {
            return false
        }
        // @Override has source retention - so we need to peek into the sources
        return repository.isOverride(method)
    }

import javax.inject.Inject;
import java.io.File;

import static com.google.common.collect.Iterables.getOnlyElement;
import static java.util.stream.Collectors.toList;

/**
 * Extracts Kotlin DSL runtime generated sources.
 *
 * Current implementation extracts these from the wrapper's API jars.
 * This is not correct as it should do this with the built distribution instead.
 *

        if (commitId.isBlank() || commitId.toLowerCase().contains("unknown")) {
            // we can't figure out the commit ID (probably this is a source distribution build), let's skip adding source links
            return;
        }

        extension.getSourceRoots().getFiles()
            .forEach(
                file -> {

plugins {
    id("gradlebuild.module-identity")
    java
}

val main = sourceSets.main.get()
val parameterNamesIndex by tasks.registering(ParameterNamesIndex::class) {
    sources.from(
        main.allJava.matching {
            include(PublicApi.includes)
            exclude(PublicApi.excludes)
        }
    )
    classpath.from(main.compileClasspath)

        val extension = this.extensions.create<ErrorProneSourceSetExtension>("errorprone", project.objects.property<Boolean>())
        // Enable it only for the main source set by default, as incremental Groovy
        // joint-compilation doesn't work with the Error Prone annotation processor
        extension.enabled.convention(this.name == "main")

        project.dependencies.addProvider(