testSourceSet.compileClasspath.contains(new File(project.buildDir, 'classes/java/main'))
        testSourceSet.annotationProcessorPath.is(project.configurations.testAnnotationProcessor)
        testSourceSet.java.destinationDirectory.set(new File(project.buildDir, 'classes/java/test'))
        testSourceSet.output.resourcesDir == new File(project.buildDir, 'resources/test')

        // TODO: synchronization
        File buildDir = buildDefinition.getBuildRootDir();
        if (buildDir == null) {
            throw new IllegalArgumentException("Included build must have a root directory defined");
        }
        IncludedBuildState includedBuild = includedBuildsByRootDir.get(buildDir);
        if (includedBuild == null) {
            if (rootBuild == null) {

                archiveFile.set(project.file("\${buildDir}/foo.zip"))
            }
            task jarTask(type: Jar) {
                from(zipTask)
                archiveFile.set(project.file("\${buildDir}/foo.jar"))
            }
            taskWithInputs {
                sources.from(jarTask)
                outputFile = project.file("\${buildDir}/output.txt")
            }
        """

                ${invocation} { println(it.buildDir) }
            }
        """

        when:
        isolatedProjectsFails(":a:help", ":b:help")

        then:
        fixture.assertStateStoredAndDiscarded {
            projectsConfigured(":", ":a", ":b")
            problem("Build file 'a/build.gradle': line 3: Project ':a' cannot access 'Project.buildDir' functionality on $message", accessedProjects)
        }

            }
        }

        then:
        getComponents()
    }

    static class RootFileRules extends RuleSource {
        @Model
        File someFile(@Path("buildDir") File buildDir) { return new File(buildDir, "something") }
    }

    templateArgs = [
        functionCount: 3
    ]
    subProjectTemplates = ['cpp-source', 'cpp-project']
    daemonMemory = '1G'
}

// Build-builder projects
tasks.register("buildBuilder", RemoteProject) {
    remoteUri = 'https://github.com/blindpirate/build-builder.git'
    // From master branch
    ref = 'b20046b38b5c11213a307f6454a6a71a59a08ba2'
}

tasks.register("installBuildBuilder", GradleBuild) {

        given:
        buildWithSingleSourceFile()

        def buildDir = file("build")
        buildDir.mkdirs()

        expect:
        configurationCacheRun "clean"
        assertStateStored()
        result.assertTasksExecuted(":clean")
        !buildDir.exists()

        when:
        buildDir.mkdirs()
        configurationCacheRun "clean"

        then:

                inputs.files(fileTree(buildDir) { include("**/*.foo")})
                def reportPath = file("\${buildDir}/fooReport.txt")
                outputs.file(reportPath)
                doLast {
                    reportPath.text = "foo"
                }
            }
            task barReport {
                inputs.files(fileTree(buildDir) { include("**/*.bar")})

        buildFile << """
            taskWithInputs {
                sources.from(project.files("foo", "bar"))
                outputFile = project.file("\${buildDir}/output.txt")
            }
        """
        file('foo').mkdir()
        file('foo/a').createFile()
        file('foo/b').createFile()
        file('bar').mkdir()
        file('bar/a').createFile()

        // but technically speaking, this can be changed _after_ this service is created.
        // There's currently no good way to figure that out.
        File buildDir = new File(gradleDir.getParentFile(), "build");
        File reportsDirectory = new File(buildDir, "reports");
        File verifyReportsDirectory = new File(reportsDirectory, "dependency-verification");