func (h *Host) fetchImage(name types.ACIdentifier, labels types.Labels) (*Image, error) {
if aci, asc, err := fetch.DiscoverACI(discovery.App{Name: name, Labels: labels.ToMap()}); err != nil {
return nil, errors.Trace(err)
} else if aci == nil {
return nil, ErrNotFound
} else {
return h.ImportImage(name, aci, asc)
}
}
// True if all labels in `labels` are present in `candidate` and have
// the same value
func MatchLabels(labels, candidate types.Labels) bool {
if len(labels) == 0 {
return true
}
cmap := candidate.ToMap()
for _, label := range labels {
if v, ok := cmap[label.Name]; !ok || v != label.Value {
return false
}
}
return true
}
