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Store the actual archive when commit

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This commit is contained in:
Guillaume J. Charmes 2013-05-08 19:08:11 -07:00
parent eed64e6777
commit aaaf3f0726
3 changed files with 45 additions and 8 deletions
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6
graph.go
View file

@ -112,7 +112,7 @@ func (graph *Graph) Create(layerData Archive, container *Container, comment, aut
img.Container = container.Id
img.ContainerConfig = *container.Config
}
if err := graph.Register(layerData, img); err != nil {
if err := graph.Register(layerData, true, img); err != nil {
return nil, err
}
go img.Checksum()
@ -121,7 +121,7 @@ func (graph *Graph) Create(layerData Archive, container *Container, comment, aut
// Register imports a pre-existing image into the graph.
// FIXME: pass img as first argument
func (graph *Graph) Register(layerData Archive, img *Image) error {
func (graph *Graph) Register(layerData Archive, store bool, img *Image) error {
if err := ValidateId(img.Id); err != nil {
return err
}
@ -134,7 +134,7 @@ func (graph *Graph) Register(layerData Archive, img *Image) error {
if err != nil {
return fmt.Errorf("Mktemp failed: %s", err)
}
if err := StoreImage(img, layerData, tmp); err != nil {
if err := StoreImage(img, layerData, tmp, store); err != nil {
return err
}
// Commit

45
image.go
View file

@ -56,7 +56,7 @@ func LoadImage(root string) (*Image, error) {
return img, nil
}
func StoreImage(img *Image, layerData Archive, root string) error {
func StoreImage(img *Image, layerData Archive, root string, store bool) error {
// Check that root doesn't already exist
if _, err := os.Stat(root); err == nil {
return fmt.Errorf("Image %s already exists", img.Id)
@ -68,6 +68,28 @@ func StoreImage(img *Image, layerData Archive, root string) error {
if err := os.MkdirAll(layer, 0700); err != nil {
return err
}
if store {
layerArchive := layerArchivePath(root)
file, err := os.OpenFile(layerArchive, os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return err
}
// FIXME: Retrieve the image layer size from here?
if _, err := io.Copy(file, layerData); err != nil {
return err
}
// FIXME: Don't close/open, read/write instead of Copy
file.Close()
file, err = os.Open(layerArchive)
if err != nil {
return err
}
defer file.Close()
layerData = file
}
if err := Untar(layerData, layer); err != nil {
return err
}
@ -86,6 +108,10 @@ func layerPath(root string) string {
return path.Join(root, "layer")
}
func layerArchivePath(root string) string {
return path.Join(root, "layer.tar.xz")
}
func jsonPath(root string) string {
return path.Join(root, "json")
}
@ -290,9 +316,20 @@ func (img *Image) Checksum() (string, error) {
return "", err
}
layerData, err := Tar(layer, Xz)
if err != nil {
return "", err
var layerData io.Reader
if file, err := os.Open(layerArchivePath(root)); err != nil {
if os.IsNotExist(err) {
layerData, err = Tar(layer, Xz)
if err != nil {
return "", err
}
} else {
return "", err
}
} else {
defer file.Close()
layerData = file
}
h := sha256.New()

2
registry.go
View file

@ -259,7 +259,7 @@ func (graph *Graph) PullImage(stdout io.Writer, imgId, registry string, token []
// FIXME: Keep goging in case of error?
return err
}
if err = graph.Register(layer, img); err != nil {
if err = graph.Register(layer, false, img); err != nil {
return err
}
}