Alexander Larsson
99bee9426b
This moves Driver.Size() to Differ.DiffSize(), removing the empty implementations in devmapper and dummy, and renaming the one in aufs. Then we fall back to a container.Changes() implementation in the non-aufs case. Upstream-commit: 5d76681c3d0cbb744205a397420603ce029ce754 Component: engine
79 lines
1.3 KiB
Go
79 lines
1.3 KiB
Go
package dummy
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import (
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"fmt"
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"github.com/dotcloud/docker/archive"
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"github.com/dotcloud/docker/graphdriver"
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"os"
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"path"
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)
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func init() {
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graphdriver.Register("dummy", Init)
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}
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func Init(home string) (graphdriver.Driver, error) {
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d := &Driver{
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home: home,
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}
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return d, nil
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}
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type Driver struct {
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home string
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}
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func (d *Driver) String() string {
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return "dummy"
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}
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func (d *Driver) Status() [][2]string {
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return nil
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}
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func (d *Driver) Cleanup() error {
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return nil
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}
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func (d *Driver) Create(id string, parent string) error {
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dir := d.dir(id)
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if err := os.MkdirAll(path.Dir(dir), 0700); err != nil {
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return err
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}
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if err := os.Mkdir(dir, 0700); err != nil {
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return err
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}
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if parent == "" {
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return nil
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}
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parentDir, err := d.Get(parent)
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if err != nil {
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return fmt.Errorf("%s: %s", parent, err)
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}
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if err := archive.CopyWithTar(parentDir, dir); err != nil {
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return err
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}
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return nil
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}
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func (d *Driver) dir(id string) string {
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return path.Join(d.home, "dir", path.Base(id))
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}
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func (d *Driver) Remove(id string) error {
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if _, err := os.Stat(d.dir(id)); err != nil {
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return err
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}
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return os.RemoveAll(d.dir(id))
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}
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func (d *Driver) Get(id string) (string, error) {
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dir := d.dir(id)
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if st, err := os.Stat(dir); err != nil {
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return "", err
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} else if !st.IsDir() {
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return "", fmt.Errorf("%s: not a directory", dir)
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}
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return dir, nil
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}
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