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Save blobs from parent snapshot to new snapshot

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This commit is contained in:
Alexander Neumann 2014-11-30 23:12:47 +01:00
parent 0ac1716463
commit caf00f6087
1 changed files with 41 additions and 7 deletions
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46
archiver.go
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@ -27,6 +27,7 @@ type Archiver struct {
ch *ContentHandler
bl *BlobList // blobs used for the current snapshot
parentBl *BlobList // blobs from the parent snapshot
fileToken chan struct{}
blobToken chan struct{}
@ -249,6 +250,30 @@ func (arch *Archiver) SaveFile(node *Node) error {
return nil
}
func (arch *Archiver) populateFromOldTree(tree, oldTree Tree) error {
// update content from old tree
err := tree.PopulateFrom(oldTree)
if err != nil {
return err
}
// add blobs to bloblist
for _, node := range tree {
if node.Content != nil {
for _, blobID := range node.Content {
blob, err := arch.parentBl.Find(Blob{ID: blobID})
if err != nil {
return err
}
arch.bl.Insert(blob)
}
}
}
return nil
}
func (arch *Archiver) loadTree(dir string, oldTreeID backend.ID) (*Tree, error) {
var (
oldTree Tree
@ -316,7 +341,7 @@ func (arch *Archiver) loadTree(dir string, oldTreeID backend.ID) (*Tree, error)
}
// populate with content from oldTree
err = tree.PopulateFrom(oldTree)
err = arch.populateFromOldTree(tree, oldTree)
if err != nil {
return nil, err
}
@ -342,12 +367,12 @@ func (arch *Archiver) loadTree(dir string, oldTreeID backend.ID) (*Tree, error)
return &tree, nil
}
func (arch *Archiver) LoadTree(path string, baseSnapshot backend.ID) (*Tree, error) {
func (arch *Archiver) LoadTree(path string, parentSnapshot backend.ID) (*Tree, error) {
var oldTree Tree
if baseSnapshot != nil {
if parentSnapshot != nil {
// load old tree from snapshot
snapshot, err := arch.ch.LoadSnapshot(baseSnapshot)
snapshot, err := LoadSnapshot(arch.ch, parentSnapshot)
if err != nil {
return nil, arrar.Annotate(err, "load old snapshot")
}
@ -356,6 +381,12 @@ func (arch *Archiver) LoadTree(path string, baseSnapshot backend.ID) (*Tree, err
return nil, errors.New("snapshot without tree!")
}
// load old bloblist from snapshot
arch.parentBl, err = LoadBlobList(arch.ch, snapshot.Map)
if err != nil {
return nil, err
}
oldTree, err = LoadTree(arch.ch, snapshot.Content)
if err != nil {
return nil, arrar.Annotate(err, "load old tree")
@ -380,8 +411,11 @@ func (arch *Archiver) LoadTree(path string, baseSnapshot backend.ID) (*Tree, err
if node.Type != "dir" {
t := &Tree{node}
// compare with old tree
t.PopulateFrom(oldTree)
// populate with content from oldTree
err = arch.populateFromOldTree(*t, oldTree)
if err != nil {
return nil, err
}
// if no old node has been found, update stats
if node.Content == nil && node.Subtree == nil {