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package images
import (
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/system"
"github.com/pkg/errors"
)
// GetContainerLayerSize returns real size & virtual size
func (i *ImageService) GetContainerLayerSize(containerID string) (int64, int64) {
// TODO Windows
return 0, 0
}
// GetLayerFolders returns the layer folders from an image RootFS
func (i *ImageService) GetLayerFolders(img *image.Image, rwLayer layer.RWLayer) ([]string, error) {
folders := []string{}
max := len(img.RootFS.DiffIDs)
for index := 1; index <= max; index++ {
// FIXME: why does this mutate the RootFS?
img.RootFS.DiffIDs = img.RootFS.DiffIDs[:index]
if !system.IsOSSupported(img.OperatingSystem()) {
return nil, errors.Wrapf(system.ErrNotSupportedOperatingSystem, "cannot get layerpath for ImageID %s", img.RootFS.ChainID())
}
layerPath, err := layer.GetLayerPath(i.layerStores[img.OperatingSystem()], img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer path from graphdriver %s for ImageID %s", i.layerStores[img.OperatingSystem()], img.RootFS.ChainID())
}
// Reverse order, expecting parent first
folders = append([]string{layerPath}, folders...)
}
if rwLayer == nil {
return nil, errors.New("RWLayer is unexpectedly nil")
}
m, err := rwLayer.Metadata()
if err != nil {
return nil, errors.Wrap(err, "failed to get layer metadata")
}
return append(folders, m["dir"]), nil
}
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