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Merge pull request #6 from dmcgowan/wip_provenance
WIP support manifest signature
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| package graph | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "io/ioutil" | ||
| "path" | ||
|
|
||
| "github.com/docker/docker/engine" | ||
| "github.com/docker/docker/pkg/tarsum" | ||
| "github.com/docker/docker/registry" | ||
| "github.com/docker/docker/runconfig" | ||
| ) | ||
|
|
||
| func (s *TagStore) CmdManifest(job *engine.Job) engine.Status { | ||
| if len(job.Args) != 1 { | ||
| return job.Errorf("usage: %s NAME", job.Name) | ||
| } | ||
| name := job.Args[0] | ||
| tag := job.Getenv("tag") | ||
| if tag == "" { | ||
| tag = "latest" | ||
| } | ||
|
|
||
| // Resolve the Repository name from fqn to endpoint + name | ||
| _, remoteName, err := registry.ResolveRepositoryName(name) | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
|
||
| manifest := map[string]interface{}{ | ||
| "name": remoteName, | ||
| "tag": tag, | ||
| } | ||
| localRepo, exists := s.Repositories[name] | ||
| if !exists { | ||
| return job.Errorf("Repo does not exist: %s", name) | ||
| } | ||
|
|
||
| layerId, exists := localRepo[tag] | ||
| if !exists { | ||
| return job.Errorf("Tag does not exist for %s: %s", name, tag) | ||
| } | ||
| tarsums := make([]string, 0, 4) | ||
| layersSeen := make(map[string]bool) | ||
|
|
||
| layer, err := s.graph.Get(layerId) | ||
| manifest["architecture"] = layer.Architecture | ||
| var metadata runconfig.Config | ||
| metadata = *layer.Config | ||
| history := make(map[string]string) | ||
|
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||
| for ; layer != nil; layer, err = layer.GetParent() { | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
|
||
| if layersSeen[layer.ID] { | ||
| break | ||
| } | ||
| if layer.Config != nil && metadata.Image != layer.ID { | ||
| err = runconfig.Merge(&metadata, layer.Config) | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
| } | ||
| archive, err := layer.TarLayer() | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
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| tarSum := &tarsum.TarSum{Reader: archive, DisableCompression: true} | ||
| if _, err := io.Copy(ioutil.Discard, tarSum); err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
|
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| layersSeen[layer.ID] = true | ||
| tarId := tarSum.Sum(nil) | ||
| tarsums = append(tarsums, tarId) | ||
|
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||
| jsonData, err := ioutil.ReadFile(path.Join(s.graph.Root, layer.ID, "json")) | ||
| if err != nil { | ||
| return job.Error(fmt.Errorf("Cannot retrieve the path for {%s}: %s", layer.ID, err)) | ||
| } | ||
| history[tarId] = string(jsonData) | ||
| } | ||
|
|
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| manifest["tarsum"] = tarsums | ||
| manifest["metadata"] = &metadata | ||
| manifest["history"] = history | ||
|
|
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| manifestBytes, err := json.MarshalIndent(manifest, "", " ") | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
|
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| _, err = job.Stdout.Write(manifestBytes) | ||
| if err != nil { | ||
| return job.Error(err) | ||
| } | ||
|
|
||
| return engine.StatusOK | ||
| } |
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