1 package main
2
3 import (
4 "io"
5 "os"
6
7 "github.com/flynn/go-docopt"
8 tuf "github.com/theupdateframework/go-tuf/client"
9 "github.com/theupdateframework/go-tuf/util"
10 )
11
12 func init() {
13 register("get", cmdGet, `
14 usage: tuf-client get [-s|--store=<path>] <url> <target>
15
16 Options:
17 -s <path> The path to the local file store [default: tuf.db]
18
19 Get a target from the repository.
20 `)
21 }
22
23 type tmpFile struct {
24 *os.File
25 }
26
27 func (t *tmpFile) Delete() error {
28 t.Close()
29 return os.Remove(t.Name())
30 }
31
32 func cmdGet(args *docopt.Args, client *tuf.Client) error {
33 if _, err := client.Update(); err != nil {
34 return err
35 }
36 target := util.NormalizeTarget(args.String["<target>"])
37 file, err := os.CreateTemp("", "go-tuf")
38 if err != nil {
39 return err
40 }
41 tmp := tmpFile{file}
42 if err := client.Download(target, &tmp); err != nil {
43 return err
44 }
45 defer tmp.Delete()
46 if _, err := tmp.Seek(0, io.SeekStart); err != nil {
47 return err
48 }
49 _, err = io.Copy(os.Stdout, file)
50 return err
51 }
52
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