怎么进行区块链中的fabric chaincode分析

func (carPlatform *Platform) GenerateDockerBuild(cds *pb.ChaincodeDeploymentSpec, tw *tar.Writer) error {   // Bundle the .car file into a tar stream so it may be transferred to the builder container   codepackage, output := io.Pipe()   go func() {      tw := tar.NewWriter(output)      err := cutil.WriteBytesToPackage("codepackage.car", cds.CodePackage, tw)      tw.Close()      output.CloseWithError(err)   }()   binpackage := bytes.NewBuffer(nil)   err := util.DockerBuild(util.DockerBuildOptions{      Cmd:          "java -jar /usr/local/bin/chaintool buildcar /chaincode/input/codepackage.car -o /chaincode/output/chaincode",      InputStream:  codepackage,      OutputStream: binpackage,   })   if err != nil {      return fmt.Errorf("Error building CAR: %s", err)   }   return cutil.WriteBytesToPackage("binpackage.tar", binpackage.Bytes(), tw)}创建容器并上传

func DockerBuild(opts DockerBuildOptions) error {   client, err := cutil.NewDockerClient()   if err != nil {      return fmt.Errorf("Error creating docker client: %s", err)   }   if opts.Image == "" {      opts.Image = cutil.GetDockerfileFromConfig("chaincode.builder")      if opts.Image == "" {         return fmt.Errorf("No image provided and \"chaincode.builder\" default does not exist")      }   }   logger.Debugf("Attempting build with image %s", opts.Image)   //-----------------------------------------------------------------------------------   // Ensure the image exists locally, or pull it from a registry if it doesn't   //-----------------------------------------------------------------------------------   _, err = client.InspectImage(opts.Image)   if err != nil {      logger.Debugf("Image %s does not exist locally, attempt pull", opts.Image)      err = client.PullImage(docker.PullImageOptions{Repository: opts.Image}, docker.AuthConfiguration{})      if err != nil {         return fmt.Errorf("Failed to pull %s: %s", opts.Image, err)      }   }   //-----------------------------------------------------------------------------------   // Create an ephemeral container, armed with our Env/Cmd   //-----------------------------------------------------------------------------------   container, err := client.CreateContainer(docker.CreateContainerOptions{      Config: &docker.Config{         Image:        opts.Image,         Env:          opts.Env,         Cmd:          []string{"/bin/sh", "-c", opts.Cmd},         AttachStdout: true,         AttachStderr: true,      },   })   if err != nil {      return fmt.Errorf("Error creating container: %s", err)   }   defer client.RemoveContainer(docker.RemoveContainerOptions{ID: container.ID})   //-----------------------------------------------------------------------------------   // Upload our input stream   //-----------------------------------------------------------------------------------   err = client.UploadToContainer(container.ID, docker.UploadToContainerOptions{      Path:        "/chaincode/input",      InputStream: opts.InputStream,   })   if err != nil {      return fmt.Errorf("Error uploading input to container: %s", err)   }   //-----------------------------------------------------------------------------------   // Attach stdout buffer to capture possible compilation errors   //-----------------------------------------------------------------------------------   stdout := bytes.NewBuffer(nil)   _, err = client.AttachToContainerNonBlocking(docker.AttachToContainerOptions{      Container:    container.ID,      OutputStream: stdout,      ErrorStream:  stdout,      Logs:         true,      Stdout:       true,      Stderr:       true,      Stream:       true,   })   if err != nil {      return fmt.Errorf("Error attaching to container: %s", err)   }   //-----------------------------------------------------------------------------------   // Launch the actual build, realizing the Env/Cmd specified at container creation   //-----------------------------------------------------------------------------------   err = client.StartContainer(container.ID, nil)   if err != nil {      return fmt.Errorf("Error executing build: %s \"%s\"", err, stdout.String())   }   //-----------------------------------------------------------------------------------   // Wait for the build to complete and gather the return value   //-----------------------------------------------------------------------------------   retval, err := client.WaitContainer(container.ID)   if err != nil {      return fmt.Errorf("Error waiting for container to complete: %s", err)   }   if retval > 0 {      return fmt.Errorf("Error returned from build: %d \"%s\"", retval, stdout.String())   }   //-----------------------------------------------------------------------------------   // Finally, download the result   //-----------------------------------------------------------------------------------   err = client.DownloadFromContainer(container.ID, docker.DownloadFromContainerOptions{      Path:         "/chaincode/output/.",      OutputStream: opts.OutputStream,   })   if err != nil {      return fmt.Errorf("Error downloading output: %s", err)   }   return nil}