package client import ( "fmt" "net/url" Cli "github.com/docker/docker/cli" "github.com/docker/docker/graph/tags" flag "github.com/docker/docker/pkg/mflag" "github.com/docker/docker/pkg/parsers" "github.com/docker/docker/registry" ) // 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 a registry", 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) taglessRemote, tag := parsers.ParseRepositoryTag(remote) if tag == "" && !*allTags { tag = tags.DefaultTag fmt.Fprintf(cli.out, "Using default tag: %s\n", tag) } else if tag != "" && *allTags { return fmt.Errorf("tag can't be used with --all-tags/-a") } ref := registry.ParseReference(tag) // Resolve the Repository name from fqn to RepositoryInfo repoInfo, err := registry.ParseRepositoryInfo(taglessRemote) if err != nil { return err } if isTrusted() && !ref.HasDigest() { // Check if tag is digest authConfig := registry.ResolveAuthConfig(cli.configFile, repoInfo.Index) return cli.trustedPull(repoInfo, ref, authConfig) } v := url.Values{} v.Set("fromImage", ref.ImageName(taglessRemote)) _, _, err = cli.clientRequestAttemptLogin("POST", "/images/create?"+v.Encode(), nil, cli.out, repoInfo.Index, "pull") return err }