func (c *Client) lookupImage(client *dockerregistry.Registry, lookupName, imageName, tag string) (flux.ImageDescription, error) {
// Minor cheat: this will give the correct result even if the
// imageName includes a host
id := flux.MakeImageID("", imageName, tag)
img := flux.ImageDescription{ID: id}
meta, err := client.Manifest(lookupName, tag)
if err != nil {
return img, err
}
// the manifest includes some v1-backwards-compatibility data,
// oddly called "History", which are layer metadata as JSON
// strings; these appear most-recent (i.e., topmost layer) first,
// so happily we can just decode the first entry to get a created
// time.
type v1image struct {
Created time.Time `json:"created"`
}
var topmost v1image
if err = json.Unmarshal([]byte(meta.History[0].V1Compatibility), &topmost); err == nil {
img.CreatedAt = topmost.Created
}
return img, err
}
func TestMakeImage(t *testing.T) {
for want, in := range imageParsingExamples {
out := flux.MakeImageID(in.Registry, in.Name, in.Tag)
if string(out) != want {
t.Fatalf("%#v.String(): %s != %s", in, out, want)
}
}
}