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