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moby--moby/api/client/pull.go
Josh Hawn 4cb0c93f92 api/client: Allow for multi-line usage help
Subcommands can provide multiple usage synopses.

Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
2015-06-10 16:14:45 -07:00

47 lines
1.3 KiB
Go

package client
import (
"fmt"
"net/url"
"github.com/docker/docker/graph/tags"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/parsers"
"github.com/docker/docker/registry"
"github.com/docker/docker/utils"
)
// 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]"}, "Pull an image or a repository from the registry", true)
allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
cmd.Require(flag.Exact, 1)
cmd.ParseFlags(args, true)
var (
v = url.Values{}
remote = cmd.Arg(0)
newRemote = remote
)
taglessRemote, tag := parsers.ParseRepositoryTag(remote)
if tag == "" && !*allTags {
newRemote = utils.ImageReference(taglessRemote, tags.DEFAULTTAG)
}
if tag != "" && *allTags {
return fmt.Errorf("tag can't be used with --all-tags/-a")
}
v.Set("fromImage", newRemote)
// Resolve the Repository name from fqn to RepositoryInfo
repoInfo, err := registry.ParseRepositoryInfo(taglessRemote)
if err != nil {
return err
}
_, _, err = cli.clientRequestAttemptLogin("POST", "/images/create?"+v.Encode(), nil, cli.out, repoInfo.Index, "pull")
return err
}