108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
package containerd
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import (
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"context"
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"encoding/json"
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"github.com/containerd/containerd/content"
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containerdimages "github.com/containerd/containerd/images"
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cplatforms "github.com/containerd/containerd/platforms"
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"github.com/docker/distribution/reference"
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imagetype "github.com/docker/docker/api/types/image"
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"github.com/docker/docker/pkg/platforms"
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"github.com/opencontainers/image-spec/identity"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/pkg/errors"
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)
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// ImageHistory returns a slice of HistoryResponseItem structures for the
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// specified image name by walking the image lineage.
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func (i *ImageService) ImageHistory(ctx context.Context, name string) ([]*imagetype.HistoryResponseItem, error) {
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desc, err := i.resolveDescriptor(ctx, name)
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if err != nil {
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return nil, err
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}
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cs := i.client.ContentStore()
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// TODO: pass the platform from the cli
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conf, err := containerdimages.Config(ctx, cs, desc, platforms.AllPlatformsWithPreference(cplatforms.Default()))
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if err != nil {
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return nil, err
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}
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diffIDs, err := containerdimages.RootFS(ctx, cs, conf)
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if err != nil {
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return nil, err
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}
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blob, err := content.ReadBlob(ctx, cs, conf)
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if err != nil {
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return nil, err
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}
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var image ocispec.Image
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if err := json.Unmarshal(blob, &image); err != nil {
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return nil, err
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}
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var (
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history []*imagetype.HistoryResponseItem
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sizes []int64
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)
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s := i.client.SnapshotService(i.snapshotter)
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for i := range diffIDs {
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chainID := identity.ChainID(diffIDs[0 : i+1]).String()
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use, err := s.Usage(ctx, chainID)
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if err != nil {
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return nil, err
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}
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sizes = append(sizes, use.Size)
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}
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for _, h := range image.History {
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size := int64(0)
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if !h.EmptyLayer {
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if len(sizes) == 0 {
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return nil, errors.New("unable to find the size of the layer")
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}
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size = sizes[0]
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sizes = sizes[1:]
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}
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history = append([]*imagetype.HistoryResponseItem{{
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ID: "<missing>",
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Comment: h.Comment,
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CreatedBy: h.CreatedBy,
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Created: h.Created.Unix(),
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Size: size,
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Tags: nil,
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}}, history...)
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}
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if len(history) != 0 {
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history[0].ID = desc.Digest.String()
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tagged, err := i.client.ImageService().List(ctx, "target.digest=="+desc.Digest.String())
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if err != nil {
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return nil, err
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}
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var tags []string
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for _, t := range tagged {
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if isDanglingImage(t) {
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continue
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}
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name, err := reference.ParseNamed(t.Name)
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if err != nil {
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return nil, err
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}
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tags = append(tags, reference.FamiliarString(name))
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}
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history[0].Tags = tags
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}
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return history, nil
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}
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