114 lines
2.6 KiB
Go
114 lines
2.6 KiB
Go
package graph
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"github.com/docker/docker/engine"
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"github.com/docker/docker/pkg/tarsum"
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"github.com/docker/docker/registry"
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"github.com/docker/docker/runconfig"
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)
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func (s *TagStore) CmdManifest(job *engine.Job) engine.Status {
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if len(job.Args) != 1 {
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return job.Errorf("usage: %s NAME", job.Name)
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}
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name := job.Args[0]
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tag := job.Getenv("tag")
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if tag == "" {
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tag = "latest"
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}
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// Resolve the Repository name from fqn to endpoint + name
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_, remoteName, err := registry.ResolveRepositoryName(name)
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if err != nil {
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return job.Error(err)
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}
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manifest := ®istry.ManifestData{
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Name: remoteName,
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Tag: tag,
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SchemaVersion: 1,
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}
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localRepo, exists := s.Repositories[name]
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if !exists {
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return job.Errorf("Repo does not exist: %s", name)
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}
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layerId, exists := localRepo[tag]
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if !exists {
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return job.Errorf("Tag does not exist for %s: %s", name, tag)
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}
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layersSeen := make(map[string]bool)
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layer, err := s.graph.Get(layerId)
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if err != nil {
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return job.Error(err)
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}
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if layer.Config == nil {
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return job.Errorf("Missing layer configuration")
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}
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manifest.Architecture = layer.Architecture
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manifest.FSLayers = make([]*registry.FSLayer, 0, 4)
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manifest.History = make([]*registry.ManifestHistory, 0, 4)
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var metadata runconfig.Config
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metadata = *layer.Config
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for ; layer != nil; layer, err = layer.GetParent() {
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if err != nil {
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return job.Error(err)
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}
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if layersSeen[layer.ID] {
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break
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}
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if layer.Config != nil && metadata.Image != layer.ID {
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err = runconfig.Merge(&metadata, layer.Config)
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if err != nil {
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return job.Error(err)
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}
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}
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archive, err := layer.TarLayer()
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if err != nil {
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return job.Error(err)
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}
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tarSum, err := tarsum.NewTarSum(archive, true, tarsum.VersionDev)
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if err != nil {
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return job.Error(err)
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}
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if _, err := io.Copy(ioutil.Discard, tarSum); err != nil {
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return job.Error(err)
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}
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tarId := tarSum.Sum(nil)
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// Save tarsum to image json
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manifest.FSLayers = append(manifest.FSLayers, ®istry.FSLayer{BlobSum: tarId})
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layersSeen[layer.ID] = true
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jsonData, err := ioutil.ReadFile(path.Join(s.graph.Root, layer.ID, "json"))
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if err != nil {
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return job.Error(fmt.Errorf("Cannot retrieve the path for {%s}: %s", layer.ID, err))
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}
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manifest.History = append(manifest.History, ®istry.ManifestHistory{V1Compatibility: string(jsonData)})
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}
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manifestBytes, err := json.MarshalIndent(manifest, "", " ")
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if err != nil {
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return job.Error(err)
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}
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_, err = job.Stdout.Write(manifestBytes)
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if err != nil {
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return job.Error(err)
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}
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return engine.StatusOK
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}
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