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package client // import "github.com/docker/docker/client"
import (
"context"
"net/url"
"github.com/docker/distribution/reference"
"github.com/pkg/errors"
)
// ImageTag tags an image in the docker host
func (cli *Client) ImageTag(ctx context.Context, source, target string) error {
if _, err := reference.ParseAnyReference(source); err != nil {
return errors.Wrapf(err, "Error parsing reference: %q is not a valid repository/tag", source)
}
ref, err := reference.ParseNormalizedNamed(target)
if err != nil {
return errors.Wrapf(err, "Error parsing reference: %q is not a valid repository/tag", target)
}
if _, isCanonical := ref.(reference.Canonical); isCanonical {
return errors.New("refusing to create a tag with a digest reference")
}
ref = reference.TagNameOnly(ref)
query := url.Values{}
query.Set("repo", reference.FamiliarName(ref))
if tagged, ok := ref.(reference.Tagged); ok {
query.Set("tag", tagged.Tag())
}
resp, err := cli.post(ctx, "/images/"+source+"/tag", query, nil, nil)
ensureReaderClosed(resp)
return err
}