forked from moby/moby
/
pull.go
90 lines (72 loc) · 2.56 KB
/
pull.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
package client
import (
"errors"
"fmt"
"golang.org/x/net/context"
Cli "github.com/docker/docker/cli"
"github.com/docker/docker/pkg/jsonmessage"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/engine-api/types"
)
// CmdPull pulls an image or a repository from the registry.
//
// Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST]
func (cli *DockerCli) CmdPull(args ...string) error {
cmd := Cli.Subcmd("pull", []string{"NAME[:TAG|@DIGEST]"}, Cli.DockerCommands["pull"].Description, true)
allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
addTrustedFlags(cmd, true)
cmd.Require(flag.Exact, 1)
cmd.ParseFlags(args, true)
remote := cmd.Arg(0)
distributionRef, err := reference.ParseNamed(remote)
if err != nil {
return err
}
if *allTags && !reference.IsNameOnly(distributionRef) {
return errors.New("tag can't be used with --all-tags/-a")
}
if !*allTags && reference.IsNameOnly(distributionRef) {
distributionRef = reference.WithDefaultTag(distributionRef)
fmt.Fprintf(cli.out, "Using default tag: %s\n", reference.DefaultTag)
}
var tag string
switch x := distributionRef.(type) {
case reference.Canonical:
tag = x.Digest().String()
case reference.NamedTagged:
tag = x.Tag()
}
registryRef := registry.ParseReference(tag)
// Resolve the Repository name from fqn to RepositoryInfo
repoInfo, err := registry.ParseRepositoryInfo(distributionRef)
if err != nil {
return err
}
ctx := context.Background()
authConfig := cli.resolveAuthConfig(ctx, repoInfo.Index)
requestPrivilege := cli.registryAuthenticationPrivilegedFunc(repoInfo.Index, "pull")
if isTrusted() && !registryRef.HasDigest() {
// Check if tag is digest
return cli.trustedPull(ctx, repoInfo, registryRef, authConfig, requestPrivilege)
}
return cli.imagePullPrivileged(ctx, authConfig, distributionRef.String(), requestPrivilege, *allTags)
}
func (cli *DockerCli) imagePullPrivileged(ctx context.Context, authConfig types.AuthConfig, ref string, requestPrivilege types.RequestPrivilegeFunc, all bool) error {
encodedAuth, err := encodeAuthToBase64(authConfig)
if err != nil {
return err
}
options := types.ImagePullOptions{
RegistryAuth: encodedAuth,
PrivilegeFunc: requestPrivilege,
All: all,
}
responseBody, err := cli.client.ImagePull(ctx, ref, options)
if err != nil {
return err
}
defer responseBody.Close()
return jsonmessage.DisplayJSONMessagesStream(responseBody, cli.out, cli.outFd, cli.isTerminalOut, nil)
}