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moby--moby/daemon/cache.go

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package daemon
import (
"github.com/Sirupsen/logrus"
"github.com/docker/docker/builder"
"github.com/docker/docker/image/cache"
)
// MakeImageCache creates a stateful image cache.
func (daemon *Daemon) MakeImageCache(sourceRefs []string) builder.ImageCache {
if len(sourceRefs) == 0 {
return cache.NewLocal(daemon.imageStore)
}
cache := cache.New(daemon.imageStore)
for _, ref := range sourceRefs {
img, err := daemon.GetImage(ref)
if err != nil {
logrus.Warnf("Could not look up %s for cache resolution, skipping: %+v", ref, err)
continue
}
cache.Populate(img)
}
return cache
}