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restic
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rewrite: use treejsonbuilder

This commit is contained in:
Michael Eischer 2022-09-06 22:19:20 +02:00
parent 82592b88b5
commit 4d6ab83019
1 changed files with 21 additions and 16 deletions
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37
cmd/restic/cmd_rewrite.go
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@ -76,7 +76,7 @@ func init() {
f.StringArrayVar(&rewriteOptions.ExcludeFiles, "exclude-file", nil, "read exclude patterns from a `file` (can be specified multiple times)")
}
type saveTreeFunction = func(*restic.Tree) (restic.ID, error)
type saveTreeFunction func([]byte) (restic.ID, error)
func filterNode(ctx context.Context, repo restic.Repository, nodepath string, nodeID restic.ID, checkExclude RejectByNameFunc, saveTreeFunc saveTreeFunction) (newNodeID restic.ID, err error) {
curTree, err := restic.LoadTree(ctx, repo, nodeID)
@ -87,26 +87,25 @@ func filterNode(ctx context.Context, repo restic.Repository, nodepath string, no
debug.Log("filterNode: %s, nodeId: %s\n", nodepath, nodeID.Str())
changed := false
newTree := restic.NewTree(len(curTree.Nodes))
tb := restic.NewTreeJSONBuilder()
for _, node := range curTree.Nodes {
path := path.Join(nodepath, node.Name)
if !checkExclude(path) {
if node.Subtree == nil {
newTree.Insert(node)
tb.AddNode(node)
continue
}
newNode := node
newID, err := filterNode(ctx, repo, path, *node.Subtree, checkExclude, saveTreeFunc)
if err != nil {
return nodeID, err
return restic.ID{}, err
}
if newID == *node.Subtree {
newTree.Insert(node)
} else {
if !node.Subtree.Equal(newID) {
changed = true
newNode.Subtree = new(restic.ID)
*newNode.Subtree = newID
newTree.Insert(newNode)
}
node.Subtree = &newID
err = tb.AddNode(node)
if err != nil {
return restic.ID{}, err
}
} else {
Verbosef("excluding %s\n", path)
@ -115,8 +114,13 @@ func filterNode(ctx context.Context, repo restic.Repository, nodepath string, no
}
if changed {
tree, err := tb.Finalize()
if err != nil {
return restic.ID{}, err
}
// Save new tree
newTreeID, err := saveTreeFunc(newTree)
newTreeID, err := saveTreeFunc(tree)
debug.Log("filterNode: save new tree for %s as %v\n", nodepath, newTreeID)
return newTreeID, err
}
@ -154,12 +158,13 @@ func rewriteSnapshot(ctx context.Context, repo *repository.Repository, sn *resti
var saveTreeFunc saveTreeFunction
if !opts.DryRun {
saveTreeFunc = func(tree *restic.Tree) (restic.ID, error) {
return restic.SaveTree(ctx, repo, tree)
saveTreeFunc = func(tree []byte) (restic.ID, error) {
id, _, _, err := repo.SaveBlob(ctx, restic.TreeBlob, tree, restic.ID{}, false)
return id, err
}
} else {
saveTreeFunc = func(tree *restic.Tree) (restic.ID, error) {
return restic.ID{0}, nil
saveTreeFunc = func(tree []byte) (restic.ID, error) {
return restic.ID{}, nil
}
}