sort the list result for ps,sandboxes,images

fix #168
Signed-off-by: yanxuean <yan.xuean@zte.com.cn>

cmd/crictl/container.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"sort"
 	"strings"
 	"text/tabwriter"
 	"time"
@@ -31,6 +32,14 @@ import (
 	pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
 )
 
+type containerByCreated []*pb.Container
+
+func (a containerByCreated) Len() int      { return len(a) }
+func (a containerByCreated) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+func (a containerByCreated) Less(i, j int) bool {
+	return a[i].CreatedAt < a[j].CreatedAt
+}
+
 type createOptions struct {
 	// configPath is path to the config for container
 	configPath string
@@ -524,6 +533,7 @@ func ListContainers(client pb.RuntimeServiceClient, opts listOptions) error {
 	if err != nil {
 		return err
 	}
+	sort.Sort(containerByCreated(r.Containers))
 
 	switch opts.output {
 	case "json":

cmd/crictl/image.go

@@ -20,6 +20,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"sort"
 	"strings"
 	"text/tabwriter"
 
@@ -35,6 +36,20 @@ const (
 	truncatedImageIDLen = 13
 )
 
+type imageByRef []*pb.Image
+
+func (a imageByRef) Len() int      { return len(a) }
+func (a imageByRef) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+func (a imageByRef) Less(i, j int) bool {
+	if len(a[i].RepoTags) > 0 && len(a[j].RepoTags) > 0 {
+		return a[i].RepoTags[0] < a[j].RepoTags[0]
+	}
+	if len(a[i].RepoDigests) > 0 && len(a[j].RepoDigests) > 0 {
+		return a[i].RepoDigests[0] < a[j].RepoDigests[0]
+	}
+	return a[i].Id < a[j].Id
+}
+
 var pullImageCommand = cli.Command{
 	Name:  "pull",
 	Usage: "Pull an image from a registry",
@@ -105,6 +120,7 @@ var listImageCommand = cli.Command{
 		if err != nil {
 			return fmt.Errorf("listing images failed: %v", err)
 		}
+		sort.Sort(imageByRef(r.Images))
 
 		switch context.String("output") {
 		case "json":

cmd/crictl/sandbox.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"sort"
 	"strings"
 	"text/tabwriter"
 	"time"
@@ -30,6 +31,20 @@ import (
 	pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
 )
 
+type sandboxBySort []*pb.PodSandbox
+
+func (a sandboxBySort) Len() int      { return len(a) }
+func (a sandboxBySort) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
+func (a sandboxBySort) Less(i, j int) bool {
+	if a[i].Metadata.Namespace != a[j].Metadata.Namespace {
+		return a[i].Metadata.Namespace < a[j].Metadata.Namespace
+	}
+	if a[i].Metadata.Name != a[j].Metadata.Name {
+		return a[i].Metadata.Name < a[j].Metadata.Name
+	}
+	return a[i].CreatedAt < a[j].CreatedAt
+}
+
 var runPodSandboxCommand = cli.Command{
 	Name:      "runs",
 	Usage:     "Run a new sandbox",
@@ -331,11 +346,11 @@ func ListPodSandboxes(client pb.RuntimeServiceClient, opts listOptions) error {
 	if err != nil {
 		return err
 	}
+	sort.Sort(sandboxBySort(r.Items))
 
 	switch opts.output {
 	case "json":
 		return outputJSON(r.Items)
-
 	case "yaml":
 		return outputYAML(r.Items)
 	}