task producer {
                outputs.cacheIf { true }
                outputs.file("build/outputs/producer.txt")
                doLast {
                    file("build/outputs/producer.txt").text = "alma"
                }
            }

            task consumer {
                dependsOn producer
                outputs.cacheIf { true }
                inputs.file("build/outputs/producer.txt")

class A2{}
"""
        file('src/main/groovy/org/gradle/B.groovy') << 'package org.gradle; class B{}'
        outputs.snapshot { run "compileGroovy" }

        when:
        a.text = 'package org.gradle; class A1 {}'
        run "compileGroovy"

        then:
        outputs.recompiledClasses('A1')
        outputs.deletedClasses('A2')
    }

    def 'only recompile removed packages'() {
        given:

"""
        and:
        outputs.snapshot { run "mainExecutable" }

        when:
        otherHeaderFile << """
            // Some extra content
"""
        and:
        run "mainExecutable"

        then:
        executedAndNotSkipped compileTask

        and:
        outputs.recompiledFile sourceFile
        and:
        !output.contains("should not be used")

        when:

        run "compileJava"
        a.text = "@Helper class A { public void foo() {} }"
        outputs.snapshot { run "compileJava" }

        when:
        b.text = " class B { }"
        run "compileJava"

        then:
        outputs.deletedFiles("BHelper", "BHelperResource")
        outputs.recompiledFiles("B")
    }

    def "generated files are recompiled when annotated file is affected by a change"() {

    def delegateCompiler = Mock(Compiler)
    def outputs = Mock(TaskOutputsInternal)
    def compileStateCache = Mock(ObjectHolder)
    def incrementalCompilation = Mock(IncrementalCompilation)
    def deleter = TestFiles.deleter()
    def compiler = new IncrementalNativeCompiler(outputs, delegateCompiler, deleter, compileStateCache, incrementalCompilation)

        then:
        outputs.stdOut == ''
        outputs.stdErr == ''

        when:
        loggingManager.levelInternal = LogLevel.WARN
        loggingManager.start()
        logger.warn("warning")
        logger.error("error")

        then:
        outputs.stdOut == TextUtil.toPlatformLineSeparators('warning\n')
        outputs.stdErr == TextUtil.toPlatformLineSeparators('error\n')

    from("src/main/webapp")
    // Copy a single file
    from("src/staging/index.html")
    // Copy the output of a task
    from(copyTask)
    // Copy the output of a task using Task outputs explicitly.
    from(tasks["copyTaskWithPatterns"].outputs)
    // Copy the contents of a Zip file
    from(zipTree("src/main/assets.zip"))
    // Determine the destination directory later

        1 * task.getOutputs() >> outputs
        1 * outputs.getFiles() >> fileCollection
        1 * fileCollection.getSingleFile() >> Stub(File)
        0 * _
    }

    def "fails resolving lazy IvyArtifact for Provider<Task> notation when task has a multiple output files"() {
        def task = Mock(Task)
        def taskProvider = Mock(TestTaskProvider)
        def outputs = Mock(TaskOutputsInternal)

        source("class A {}", "class B {}")
        outputs.snapshot { run language.compileTaskName }
        source("class A { garbage }")
        runAndFail language.compileTaskName
        outputs.noneRecompiled()

        when:
        source("class A { }")
        run language.compileTaskName

        then:
        outputs.recompiledClasses("A")
        outputs.hasFiles(file("A.class"), file("B.class"))
    }

    @PathSensitive(PathSensitivity.RELATIVE)
    @InputArtifact
    abstract Provider<FileSystemLocation> getInput()

    @Override
    void transform(TransformOutputs outputs) {
        def outputDir = outputs.dir("${input.get().asFile.name}.loc")
        println("Running transform on ${input.get().asFile.name}, incremental: ${inputChanges.incremental}")