def dir2 = projectDir.createDir("dir2")
        def file3 = dir2.createFile("other/file3")
        def dir3 = projectDir.file("missing")

        expect:
        def dirVar = factory.newDirectoryProperty()
        def tree = dirVar.asFileTree

        dirVar.set(dir1)
        tree.files == [file1, file2] as Set

        dirVar.set(dir2)
        tree.files == [file3] as Set

Flags:

	-D name[=value]
		Predefine symbol name with an optional simple value.
		Can be repeated to define multiple symbols.
	-I dir1 -I dir2
		Search for #include files in dir1, dir2, etc,
		after consulting $GOROOT/pkg/$GOOS_$GOARCH.
	-S
		Print assembly and machine code.
	-V
		Print assembler version and exit.
	-debug
		Dump instructions as they are parsed.
	-dynlink

	}
	fmt.Fprintf(os.Stderr, "usage: go tool covdata %s -i=dir1,dir2 -o=<dir>\n\n", s.mode)
	flag.PrintDefaults()
	fmt.Fprintf(os.Stderr, "\nExamples:\n\n")
	op := "from"
	if s.mode == intersectMode {
		op = "with"
	}
	fmt.Fprintf(os.Stderr, "  go tool covdata %s -i=dir1,dir2 -o=outdir\n\n", s.mode)
	fmt.Fprintf(os.Stderr, "  \t%ss dir2 %s dir1, writing result\n", s.mode, op)

                    add(TaskGeneratedSingleFileReport, "file2", task)
                    add(TaskGeneratedSingleDirectoryReport, "dir1", task, null)
                    add(TaskGeneratedSingleDirectoryReport, "dir2", task, null)
                }
            }
        """
        file("buildSrc/src/main/groovy/TestTask.groovy") << """
            import org.gradle.api.*
            import org.gradle.api.tasks.*

mkdir dir1
mkdir dir2

cd dir1
go mod vendor -v -o relative-vendor-dir

go mod vendor -v -o ../dir2/relative-vendor-dir

cd ..
exists dir1/relative-vendor-dir/modules.txt
exists dir1/relative-vendor-dir/a/foo/LICENSE
exists dir2/relative-vendor-dir/modules.txt
exists dir2/relative-vendor-dir/a/foo/LICENSE

		{"T1.tmpl", `T1 invokes T2: ({{template "T2"}})`},
	})

	dir2 := createTestDir([]templateFile{
		// T2.tmpl defines a template T2.
		{"T2.tmpl", `{{define "T2"}}This is T2{{end}}`},
	})

	// Clean up after the test; another quirk of running as an example.
	defer func(dirs ...string) {
		for _, dir := range dirs {
			os.RemoveAll(dir)
		}
	}(dir1, dir2)

	// Here starts the example proper.

	flag.PrintDefaults()
	fmt.Fprintf(os.Stderr, "\nExamples:\n\n")
	fmt.Fprintf(os.Stderr, "  go tool covdata merge -i=dir1,dir2,dir3 -o=outdir\n\n")
	fmt.Fprintf(os.Stderr, "  \tmerges all files in dir1/dir2/dir3\n")
	fmt.Fprintf(os.Stderr, "  \tinto output dir outdir\n")
	Exit(2)
}

func (m *mstate) Setup() {
	if *indirsflag == "" {

	"runtime"
	"syscall"
	"testing"
)

var isReadonlyError = func(error) bool { return false }

func TestMkdirAll(t *testing.T) {
	t.Parallel()

	tmpDir := TempDir()
	path := tmpDir + "/_TestMkdirAll_/dir/./dir2"
	err := MkdirAll(path, 0777)
	if err != nil {
		t.Fatalf("MkdirAll %q: %s", path, err)
	}
	defer RemoveAll(tmpDir + "/_TestMkdirAll_")

	// Already exists, should succeed.
	err = MkdirAll(path, 0777)

        jar(file)
        def dir2 = testDir.file("thing2.dir")
        classesDir(dir2)
        def file2 = testDir.file("thing2.jar")
        jar(file2)
        def dir3 = testDir.file("thing3.dir")
        classesDir(dir3)
        def file3 = testDir.file("thing3.jar")
        jar(file3)
        def classpath = DefaultClassPath.of(dir, file, dir2, file2, dir3, file3)

        then:
        assertThat(sourceSet.output.files, equalTo([dir1] as Set))

        when:
        def dir2 = tmpDir.file('other-classes')
        sourceSet.output.classesDirs.from = [dir2]
        then:
        assertThat(sourceSet.output.files, equalTo([dir2] as Set))
    }

    void dependenciesTrackChangesToCompileTasks() {
        SourceSet sourceSet = sourceSet('set-name')