148 lines
3 KiB
Go
148 lines
3 KiB
Go
package main
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import (
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"os"
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"time"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/restic"
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"github.com/spf13/cobra"
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)
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var cmdRecover = &cobra.Command{
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Use: "recover [flags]",
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Short: "Recover data from the repository",
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Long: `
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The "recover" command builds a new snapshot from all directories it can find in
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the raw data of the repository. It can be used if, for example, a snapshot has
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been removed by accident with "forget".
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EXIT STATUS
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===========
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Exit status is 0 if the command was successful, and non-zero if there was any error.
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`,
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runRecover(globalOptions)
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},
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}
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func init() {
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cmdRoot.AddCommand(cmdRecover)
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}
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func runRecover(gopts GlobalOptions) error {
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hostname, err := os.Hostname()
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if err != nil {
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return err
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}
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repo, err := OpenRepository(gopts)
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if err != nil {
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return err
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}
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lock, err := lockRepo(gopts.ctx, repo)
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defer unlockRepo(lock)
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if err != nil {
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return err
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}
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Verbosef("load index files\n")
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if err = repo.LoadIndex(gopts.ctx); err != nil {
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return err
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}
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// trees maps a tree ID to whether or not it is referenced by a different
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// tree. If it is not referenced, we have a root tree.
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trees := make(map[restic.ID]bool)
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for blob := range repo.Index().Each(gopts.ctx) {
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if blob.Blob.Type != restic.TreeBlob {
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continue
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}
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trees[blob.Blob.ID] = false
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}
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cur := 0
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max := len(trees)
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Verbosef("load %d trees\n\n", len(trees))
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for id := range trees {
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cur++
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Verbosef("\rtree (%v/%v)", cur, max)
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if !trees[id] {
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trees[id] = false
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}
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tree, err := repo.LoadTree(gopts.ctx, id)
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if err != nil {
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Warnf("unable to load tree %v: %v\n", id.Str(), err)
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continue
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}
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for _, node := range tree.Nodes {
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if node.Type != "dir" || node.Subtree == nil {
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continue
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}
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subtree := *node.Subtree
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trees[subtree] = true
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}
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}
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Verbosef("\ndone\n")
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roots := restic.NewIDSet()
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for id, seen := range trees {
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if seen {
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continue
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}
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roots.Insert(id)
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}
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Verbosef("found %d roots\n", len(roots))
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tree := restic.NewTree()
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for id := range roots {
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var subtreeID = id
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node := restic.Node{
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Type: "dir",
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Name: id.Str(),
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Mode: 0755,
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Subtree: &subtreeID,
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AccessTime: time.Now(),
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ModTime: time.Now(),
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ChangeTime: time.Now(),
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}
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tree.Insert(&node)
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}
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treeID, err := repo.SaveTree(gopts.ctx, tree)
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if err != nil {
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return errors.Fatalf("unable to save new tree to the repo: %v", err)
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}
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err = repo.Flush(gopts.ctx)
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if err != nil {
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return errors.Fatalf("unable to save blobs to the repo: %v", err)
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}
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sn, err := restic.NewSnapshot([]string{"/recover"}, []string{}, hostname, time.Now())
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if err != nil {
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return errors.Fatalf("unable to save snapshot: %v", err)
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}
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sn.Tree = &treeID
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id, err := repo.SaveJSONUnpacked(gopts.ctx, restic.SnapshotFile, sn)
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if err != nil {
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return errors.Fatalf("unable to save snapshot: %v", err)
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}
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Printf("saved new snapshot %v\n", id.Str())
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return nil
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}
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