@VisibleForTesting
    final File[] roots;
    private final OperatingSystem os;

    @Inject
    public LinuxInstallationSupplier() {
        this(OperatingSystem.current(), new File("/usr/lib/jvm"), new File("/usr/lib64/jvm"), new File("/usr/java"), new File("/usr/local/java"), new File("/opt/java"));
    }

    @VisibleForTesting
    LinuxInstallationSupplier(OperatingSystem os, File... roots) {
        this.roots = roots;

var x509usefallbackroots = godebug.New("x509usefallbackroots")

// SetFallbackRoots sets the roots to use during certificate verification, if no
// custom roots are specified and a platform verifier or a system certificate
// pool is not available (for instance in a container which does not have a root
// certificate bundle). SetFallbackRoots will panic if roots is nil.
//
// SetFallbackRoots may only be called once, if called multiple times it will

    fun rootSpecOf(value: FileTreeInternal): List<FileTreeSpec> {
        val visitor = FileTreeVisitor()
        value.visitStructure(visitor)
        return visitor.roots
    }

    private
    inner class FileTreeVisitor : FileCollectionStructureVisitor {
        var roots = mutableListOf<FileTreeSpec>()

        override fun startVisit(source: FileCollectionInternal.Source, fileCollection: FileCollectionInternal): Boolean = when {

    List<BuildOperationRecord> getRoots() {
        operations.roots
    }

    @Override
    @SuppressWarnings("GrUnnecessaryPublicModifier")
    public <T extends BuildOperationType<?, ?>> BuildOperationRecord root(Class<T> type, Spec<? super BuildOperationRecord> predicate = Specs.satisfyAll()) {
        def detailsType = BuildOperationTypes.detailsType(type)
        def roots = operations.roots.findAll {

    }

    public static ImmutableListMultimap<String, HashCode> getRootHashes(FileSystemSnapshot roots) {
        if (roots == FileSystemSnapshot.EMPTY) {
            return ImmutableListMultimap.of();
        }
        ImmutableListMultimap.Builder<String, HashCode> builder = ImmutableListMultimap.builder();
        roots.accept(snapshot -> {
            builder.put(snapshot.getAbsolutePath(), snapshot.getHash());

		return nil, nil, fmt.Errorf("error when retrieving CA cert: (%v)", err)
	}
	// Verify the certificate chain before returning the certificate
	roots := x509.NewCertPool()
	if roots == nil {
		return nil, nil, fmt.Errorf("failed to create cert pool")
	}
	if ok := roots.AppendCertsFromPEM(caCert); !ok {
		return nil, nil, fmt.Errorf("failed to append CA certificate")
	}
	intermediates := x509.NewCertPool()

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "has default roots"() {
        given:
        def supplier = new LinuxInstallationSupplier()

        expect:
        supplier.roots.length > 1
    }

    def "supplies no installations for non-existing directory"() {
        given:

        }
    }

    @Override
    List<BuildOperationRecord> getRoots() {
        getTree().roots
    }

    List<BuildOperationRecord> getDanglingChildren() {
        new BuildOperationTreeFixture(BuildOperationTrace.readPartialTree(path)).roots.findAll { it.parentId != null }
    }

    @Override
    @SuppressWarnings("GrUnnecessaryPublicModifier")

import kotlin.io.path.extension

/**
 * Collect source file path as [String] from the given source roots in [compilerConfig].
 *
 * Such source roots are either [KotlinSourceRoot] or [JavaSourceRoot], and thus
 * this util collects all `.kt` and `.java` files under source roots.
 */
internal fun getSourceFilePaths(
    compilerConfig: CompilerConfiguration,
    includeDirectoryRoot: Boolean = false,

    /**
     * The [KtModule]'s properties or references to other modules are being changed.
     *
     * #### Examples
     *
     *  - The name of the module is being changed.
     *  - The module's content roots are being changed, such as adding another source folder to a source module.
     *  - If module A depends on module B and module B is being removed, in addition to the removal event for module B, module A also