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package main
import (
"github.com/containers/image/docker/reference"
"github.com/containers/storage"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/libpod"
"github.com/urfave/cli"
)
var (
tagDescription = "Adds one or more additional names to locally-stored image"
tagCommand = cli.Command{
Name: "tag",
Usage: "Add an additional name to a local image",
Description: tagDescription,
Action: tagCmd,
ArgsUsage: "IMAGE-NAME [IMAGE-NAME ...]",
}
)
func tagCmd(c *cli.Context) error {
args := c.Args()
if len(args) < 2 {
return errors.Errorf("image name and at least one new name must be specified")
}
runtime, err := getRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not create runtime")
}
defer runtime.Shutdown(false)
img, err := runtime.GetImage(args[0])
if err != nil {
return err
}
if img == nil {
return errors.New("null image")
}
err = addImageNames(runtime, img, args[1:])
if err != nil {
return errors.Wrapf(err, "error adding names %v to image %q", args[1:], args[0])
}
return nil
}
func addImageNames(runtime *libpod.Runtime, image *storage.Image, addNames []string) error {
// Add tags to the names if applicable
names, err := expandedTags(addNames)
if err != nil {
return err
}
for _, name := range names {
if err := runtime.TagImage(image, name); err != nil {
return errors.Wrapf(err, "error adding name (%v) to image %q", name, image.ID)
}
}
return nil
}
func expandedTags(tags []string) ([]string, error) {
expandedNames := []string{}
for _, tag := range tags {
var labelName string
name, err := reference.Parse(tag)
if err != nil {
return nil, errors.Wrapf(err, "error parsing tag %q", name)
}
if _, ok := name.(reference.NamedTagged); ok {
labelName = name.String()
} else {
labelName = name.String() + ":latest"
}
expandedNames = append(expandedNames, labelName)
}
return expandedNames, nil
}
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