then:
        outputs.stdOut.readLines() == ['message']
        outputs.stdErr == ''
    }

    def rendersErrorLogEventsToStdErr() {
        when:
        renderer.attachSystemOutAndErr()
        renderer.onOutput(event('message', LogLevel.ERROR))

        then:
        outputs.stdOut == ''
        outputs.stdErr.readLines() == ['message']
    }

                return Collections.emptyMap();
            }
            List<String> lines = readLines(incrementalProcessorDeclaration);
            return parseIncrementalProcessors(lines);
        }

        private List<String> readLines(File file) throws IOException {
            return Files.asCharSource(file, Charsets.UTF_8).readLines(new MetadataLineProcessor());
        }

            def myTask = tasks.register("myTask", SomeTask) {
                assert false, "This task is overwritten before been realized"
            }
            myTask.configure {
                assert false, "This task is overwritten before been realized"
            }

            tasks.create(name: "myTask", type: SomeOtherTask, overwrite: true) {
               println "Configure ${path}"
            }

        }
    }

    static class VisualStudioPluginRootRules extends RuleSource {
        // This ensures that subprojects are realized and register their project and project configuration IDE artifacts
        @Mutate
        public static void ensureSubprojectsAreRealized(TaskContainer tasks, ProjectIdentifier projectIdentifier, ServiceRegistry serviceRegistry) {

        this.componentIdentifier = componentIdentifier;
        this.publishArtifact = publishArtifact;
        // In case the publish artifact is backed by an ArchiveTask, this causes the task to be realized.
        // However, if we are at this point, we need the realized task to determine the archive extension/type later
        // to set the 'artifactType' attribute required in matching (even if the variant with the artifact is not selected in the end).

            }
        """
        resolve.prepare()
    }

    def "produces sensible error when bad code is supplied in component metadata rule" () {
        def lines = buildFile.readLines().size()
        buildFile << """
            class WrongRule implements ComponentMetadataRule {
                public void execute(ComponentMetadataContext context) {
                    foo()
                }

        def process = ['readelf', '-h', binaryFile.absolutePath].execute()
        List<String> lines = process.inputStream.readLines()
        return readArch(lines)
    }

    List<String> listObjectFiles() {
        def process = ['ar', '-t', binaryFile.getAbsolutePath()].execute()
        return process.inputStream.readLines()
    }

    List<String> listLinkedLibraries() {

class ProjectVariantResolutionIntegrationTest extends AbstractIntegrationSpec implements VariantAwareDependencyResolutionTestFixture, TasksWithInputsAndOutputs {
    def "does not realize tasks that produce outgoing artifacts that are not required"() {
        createDirs("a", "b")
        settingsFile << """
            include 'a', 'b'
        """
        setupBuildWithColorVariants()

    }
    def "resolution result does not realize artifact tasks"() {
        createDirs("producer")
        settingsFile << "include 'producer'"
        file("producer/build.gradle") << """
            plugins {
                id("base")
            }

            def fooTask = tasks.register("foo", Zip) {
                throw new RuntimeException("Realized artifact task")
            }

public class DefaultRealizableTaskCollection<T extends Task> extends DelegatingNamedDomainObjectSet<T> implements TaskCollection<T>, TaskDependencyContainer {

    private final Class<T> type;
    private final AtomicBoolean realized = new AtomicBoolean();
    private final MutableModelNode modelNode;
    private final Instantiator instantiator;