84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"fmt"
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"time"
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"github.com/docker/distribution/reference"
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"github.com/docker/docker/api/types/image"
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"github.com/docker/docker/layer"
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)
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// ImageHistory returns a slice of ImageHistory structures for the specified image
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// name by walking the image lineage.
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func (daemon *Daemon) ImageHistory(name string) ([]*image.HistoryResponseItem, error) {
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start := time.Now()
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img, err := daemon.GetImage(name)
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if err != nil {
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return nil, err
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}
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history := []*image.HistoryResponseItem{}
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layerCounter := 0
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rootFS := *img.RootFS
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rootFS.DiffIDs = nil
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for _, h := range img.History {
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var layerSize int64
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if !h.EmptyLayer {
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if len(img.RootFS.DiffIDs) <= layerCounter {
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return nil, fmt.Errorf("too many non-empty layers in History section")
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}
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rootFS.Append(img.RootFS.DiffIDs[layerCounter])
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l, err := daemon.layerStores[img.OperatingSystem()].Get(rootFS.ChainID())
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if err != nil {
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return nil, err
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}
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layerSize, err = l.DiffSize()
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layer.ReleaseAndLog(daemon.layerStores[img.OperatingSystem()], l)
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if err != nil {
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return nil, err
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}
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layerCounter++
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}
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history = append([]*image.HistoryResponseItem{{
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ID: "<missing>",
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Created: h.Created.Unix(),
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CreatedBy: h.CreatedBy,
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Comment: h.Comment,
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Size: layerSize,
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}}, history...)
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}
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// Fill in image IDs and tags
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histImg := img
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id := img.ID()
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for _, h := range history {
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h.ID = id.String()
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var tags []string
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for _, r := range daemon.referenceStore.References(id.Digest()) {
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if _, ok := r.(reference.NamedTagged); ok {
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tags = append(tags, reference.FamiliarString(r))
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}
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}
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h.Tags = tags
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id = histImg.Parent
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if id == "" {
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break
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}
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histImg, err = daemon.GetImage(id.String())
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if err != nil {
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break
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}
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}
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imageActions.WithValues("history").UpdateSince(start)
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return history, nil
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}
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