forked from TrueCloudLab/restic
136 lines
2.6 KiB
Go
136 lines
2.6 KiB
Go
package main
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import (
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"bytes"
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"crypto/sha256"
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"io"
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"log"
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"os"
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"path/filepath"
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"github.com/fd0/khepri/storage"
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)
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func hash(filename string) (storage.ID, error) {
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h := sha256.New()
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f, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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io.Copy(h, f)
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return h.Sum([]byte{}), nil
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}
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func archive_dir(repo storage.Repository, path string) (storage.ID, error) {
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log.Printf("archiving dir %q", path)
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dir, err := os.Open(path)
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if err != nil {
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log.Printf("open(%q): %v\n", path, err)
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return nil, err
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}
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entries, err := dir.Readdir(-1)
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if err != nil {
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log.Printf("readdir(%q): %v\n", path, err)
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return nil, err
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}
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t := storage.NewTree()
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for _, e := range entries {
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node := storage.NodeFromFileInfo(e)
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var id storage.ID
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var err error
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if e.IsDir() {
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id, err = archive_dir(repo, filepath.Join(path, e.Name()))
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} else {
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id, err = repo.PutFile(filepath.Join(path, e.Name()))
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}
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node.Content = id
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t.Nodes = append(t.Nodes, node)
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if err != nil {
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log.Printf(" error storing %q: %v\n", e.Name(), err)
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continue
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}
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}
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log.Printf(" dir %q: %v entries", path, len(t.Nodes))
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var buf bytes.Buffer
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t.Save(&buf)
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id, err := repo.PutRaw(buf.Bytes())
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if err != nil {
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log.Printf("error saving tree to repo: %v", err)
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}
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log.Printf("tree for %q saved at %s", path, id)
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return id, nil
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}
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func main() {
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if len(os.Args) <= 2 {
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log.Fatalf("usage: %s repo [add|link|putdir] ...", os.Args[0])
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}
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repo, err := storage.NewDirRepository(os.Args[1])
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if err != nil {
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log.Fatalf("error: %v", err)
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}
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switch os.Args[2] {
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case "add":
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for _, file := range os.Args[3:] {
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f, err := os.Open(file)
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if err != nil {
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log.Printf("error opening file %q: %v", file, err)
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continue
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}
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id, err := repo.Put(f)
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if err != nil {
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log.Printf("Put() error: %v", err)
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continue
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}
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log.Printf("archived file %q as ID %v", file, id)
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}
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case "link":
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file := os.Args[3]
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name := os.Args[4]
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id, err := hash(file)
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if err != nil {
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log.Fatalf("error hashing filq %q: %v", file, err)
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}
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present, err := repo.Test(id)
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if err != nil {
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log.Fatalf("error testing presence of id %v: %v", id, err)
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}
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if !present {
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log.Printf("adding file to repo as ID %v", id)
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_, err = repo.PutFile(file)
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if err != nil {
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log.Fatalf("error adding file %q: %v", file, err)
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}
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}
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err = repo.Link(name, id)
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if err != nil {
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log.Fatalf("error linking name %q to id %v", name, id)
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}
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case "putdir":
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for _, dir := range os.Args[3:] {
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archive_dir(repo, dir)
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}
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default:
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log.Fatalf("unknown command: %q", os.Args[2])
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}
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}
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