pkg/libcontainer/nsinit/spec.go

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package main
import (
"encoding/json"
"fmt"
"log"
"os"
"github.com/codegangsta/cli"
"github.com/dotcloud/docker/pkg/libcontainer"
)
var specCommand = cli.Command{
Name: "spec",
Usage: "display the container specification",
Action: specAction,
}
func specAction(context *cli.Context) {
// returns the spec of the current container.
spec, err := getContainerSpec(container)
if err != nil {
log.Printf("Failed to get spec - %v\n", err)
os.Exit(1)
}
fmt.Printf("Spec:\n%v\n", spec)
os.Exit(0)
}
// returns the container spec in json format.
func getContainerSpec(container *libcontainer.Container) (string, error) {
spec, err := json.MarshalIndent(container, "", "\t")
if err != nil {
return "", err
}
return string(spec), nil
}