def versionDir = this.versionDir
        fileAccessManager.access(distributionZip) {
            if (!markerFile.exists()) {
                distributionZip.delete()
                gradleHomeDir.deleteDir()

                URL url = getDownloadURL();
                System.out.println("downloading $url")
                distributionZip.copyFrom(url)

        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies single installations for single candidate"() {
        given:

        tgzCacheEntry.delete()

        def metadata = new Properties()
        extractDir.file("METADATA").withInputStream { input ->
            metadata.load(input)
        }
        extractDir.deleteDir()
        return metadata
    }

}

func (m *realDeps) addIP(name string, ip netip.Addr, ipProto uint8, comment string, replace bool) error {
	return errors.New("not implemented on this platform")
}

func (m *realDeps) deleteIP(name string, ip netip.Addr, ipProto uint8) error {
	return errors.New("not implemented on this platform")
}

func (m *realDeps) flush(name string) error {
	return errors.New("not implemented on this platform")
}

        given:
        run("work")
        run("work")
        result.assertTasksSkipped(":work")

        when:
        Files.move(inDir.toPath(), copy.toPath(), StandardCopyOption.ATOMIC_MOVE)
        inDir.deleteDir()
        inDir.createLink(copy)

        run("work")

        /*
         * This documents the current behavior, which is optimizing
         * for performance at the expense of not detecting some corner

        runCacheableBuild(pushToCacheEvents)
        then:
        !cacheableTaskResult(pushToCacheEvents).fromCache
        !cacheableTaskResult(pushToCacheEvents).upToDate

        when:
        file("build").deleteDir()
        and:
        def pullFromCacheResults = ProgressEvents.create()
        runCacheableBuild(pullFromCacheResults)
        then:
        cacheableTaskResult(pullFromCacheResults).fromCache

        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies single installations for single candidate"() {
        given:

    private MavenFileRepository mavenRepo
    private TestFile gradleUserHomeDir

    boolean retryWithCleanProjectDir() {
        temporaryFolder.testDirectory.listFiles().each {
            it.deleteDir()
        }
        true
    }

    def cleanup() {
        executers.each { it.cleanup() }
    }

    void requireOwnGradleUserHomeDir() {
        gradleUserHomeDir = file("user-home")
    }

        0 * logger._
    }

    def "filters always and warns once about an installation that does not exist"() {
        given:
        def jdk8 = temporaryFolder.createDir("non-existent")
        jdk8.deleteDir()
        def logOutput = "Directory '${jdk8}' (testSource) used for java installations does not exist"
        when:
        def registry = createRegistry([jdk8])
        def installations = registry.listInstallations()

func (m *MockedIpsetDeps) addIP(name string, ip netip.Addr, ipProto uint8, comment string, replace bool) error {
	args := m.Called(name, ip, ipProto, comment, replace)
	return args.Error(0)
}

func (m *MockedIpsetDeps) deleteIP(name string, ip netip.Addr, ipProto uint8) error {
	args := m.Called(name, ip, ipProto)
	return args.Error(0)
}

func (m *MockedIpsetDeps) flush(name string) error {
	args := m.Called(name)
	return args.Error(0)