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