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moby--moby/daemon/export.go

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package daemon
import (
"fmt"
"io"
"github.com/docker/docker/engine"
)
func (daemon *Daemon) ContainerExport(job *engine.Job) error {
if len(job.Args) != 1 {
return fmt.Errorf("Usage: %s container_id", job.Name)
}
name := job.Args[0]
container, err := daemon.Get(name)
if err != nil {
return err
}
data, err := container.Export()
if err != nil {
return fmt.Errorf("%s: %s", name, err)
}
defer data.Close()
// Stream the entire contents of the container (basically a volatile snapshot)
if _, err := io.Copy(job.Stdout, data); err != nil {
return fmt.Errorf("%s: %s", name, err)
}
// FIXME: factor job-specific LogEvent to engine.Job.Run()
container.LogEvent("export")
return nil
}