func createBase(t *testing.T, driver graphdriver.Driver, name string) {
// We need to be able to set any perms
oldmask := syscall.Umask(0)
defer syscall.Umask(oldmask)
if err := driver.Create(name, ""); err != nil {
t.Fatal(err)
}
dir, err := driver.Get(name, "")
if err != nil {
t.Fatal(err)
}
defer driver.Put(name)
subdir := path.Join(dir, "a subdir")
if err := os.Mkdir(subdir, 0705|os.ModeSticky); err != nil {
t.Fatal(err)
}
if err := os.Chown(subdir, 1, 2); err != nil {
t.Fatal(err)
}
file := path.Join(dir, "a file")
if err := ioutil.WriteFile(file, []byte("Some data"), 0222|os.ModeSetuid); err != nil {
t.Fatal(err)
}
}
func addManyLayers(drv graphdriver.Driver, baseLayer string, count int) (string, error) {
lastLayer := baseLayer
for i := 1; i <= count; i++ {
nextLayer := stringid.GenerateRandomID()
if err := drv.Create(nextLayer, lastLayer, "", nil); err != nil {
return "", err
}
if err := addLayerFiles(drv, nextLayer, lastLayer, i); err != nil {
return "", err
}
lastLayer = nextLayer
}
return lastLayer, nil
}
func tarFromFilesInGraph(graph graphdriver.Driver, graphID, parentID string, files ...FileApplier) ([]byte, error) {
t, err := tarFromFiles(files...)
if err != nil {
return nil, err
}
if err := graph.Create(graphID, parentID, ""); err != nil {
return nil, err
}
if _, err := graph.ApplyDiff(graphID, parentID, archive.Reader(bytes.NewReader(t))); err != nil {
return nil, err
}
ar, err := graph.Diff(graphID, parentID)
if err != nil {
return nil, err
}
defer ar.Close()
return ioutil.ReadAll(ar)
}