snapshot >> outputSnapshot
        }
        0 * _

        then:
        result as Map == ["output": outputSnapshot]
    }

    def "reports snapshotting problem"() {
        def failure = new UncheckedIOException(new IOException("Error"))

        when:
        outputSnapshotter.snapshotOutputs(work, workspace)

        then:

        'resources directory' | 'RESOURCES' | 'resources/main'    | 'processResources' | 'compileJava'
    }

    @Issue("gradle/gradle#1347")
    def "compile classpath snapshotting ignores non-relevant elements"() {
        def buildFileWithDependencies = { String... dependencies ->
            buildFile.text = """
                apply plugin: 'java'

                ${mavenCentralRepository()}

                outputFile = file("classes.jar")
            }
        """

        // This is to make sure that:
        //   - The snapshotting of the zip task finishes after the outputs have been broadcast by the compile task
        //   - The snapshotting of the zip task finishes before the snapshotting of the outputs of the compile task
        server.expectConcurrent("zipFileSnapshottingStarted", "compileAction1")

        run("generate")

        then:
        result.assertTaskNotSkipped(":generate")
        output.count("checking") == 22 // checked twice, once to snapshot and once when the task action runs. Should be memoized when snapshotting
        outputContains("checking a/a.txt")
        outputContains("checking d/d.txt")
        file("out.txt").text == "a.txt,c.txt,d.txt"
    }

        _ * context.cachingState >> CachingState.disabledWithoutInputs(new CachingDisabledReason(CachingDisabledReasonCategory.UNKNOWN, "Unknown"))
        0 * _
    }

    def "fails if snapshotting outputs fail"() {
        def delegateDuration = Duration.ofMillis(123)
        def failure = new OutputSnapshotter.OutputFileSnapshottingException("output", new IOException("Error")) {}

            generateProject(subProjectDir, dependencyTree, subProjectNumber, projectDepth - 1)
        }
    }

    /**
     * This is just to ensure we test the overhead of having a buildSrc project, e.g. snapshotting the Gradle API.
     */
    private addDummyBuildSrcProject(File projectDir) {
        file projectDir, "buildSrc/src/main/${config.language.name}/Thing.${config.language.name}", "public class Thing {}"

        long snapshotOutputDuration = timer.getElapsedMillis();

        // The origin execution time is recorded as “work duration” + “output snapshotting duration”,
        // As this is _roughly_ the amount of time that is avoided by reusing the outputs,
        // which is currently the _only_ thing this value is used for.

            updateRootUnderLock(root -> updateNotifyingListeners(diffListener -> root.store(absolutePath, snapshot, diffListener)));
        } else {
            LOGGER.debug("Changes to the virtual file system happened while snapshotting '{}', not storing resulting snapshot", absolutePath);
        }
    }

    @Override
    public void invalidate(Iterable<String> locations) {
        LOGGER.debug("Invalidating VFS paths: {}", locations);

    // operations in general because we do not support snapshotting them.
    //
    // TODO(b/112837194): This restriction can be lifted with some work.
    bool allow_stack_ops = false;

    // Whether TensorArray operations are allowed.  We avoid auto-clustering
    // TensorArray operations in general because we do not support snapshotting
    // them.
    //

	// Should be smallish sized cidr, this thing is kept in etcd
	// bigger cidr (specially those offered by IPv6) will add no value
	// significantly increase snapshotting time.
	var ones, bits = cidr.Mask.Size()
	if bits-ones > maxCIDRBits {
		return fmt.Errorf("specified %s is too large; for %d-bit addresses, the mask must be >= %d", cidrFlag, bits, bits-maxCIDRBits)
	}

	return nil