podmanv2 pod exists

add pod exists for podman v2

Signed-off-by: Brent Baude <bbaude@redhat.com>

cmd/podmanV2/containers/exists.go

@@ -19,6 +19,7 @@ var (
 		Example: `podman container exists containerID
   podman container exists myctr || podman run --name myctr [etc...]`,
 		RunE: exists,
+		Args: cobra.ExactArgs(1),
 	}
 )
 

cmd/podmanV2/pods/exists.go

@@ -0,0 +1,43 @@
+package pods
+
+import (
+	"context"
+	"os"
+
+	"github.com/containers/libpod/cmd/podmanV2/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/spf13/cobra"
+)
+
+var (
+	podExistsDescription = `If the named pod exists in local storage, podman pod exists exits with 0, otherwise the exit code will be 1.`
+
+	existsCommand = &cobra.Command{
+		Use:   "exists POD",
+		Short: "Check if a pod exists in local storage",
+		Long:  podExistsDescription,
+		RunE:  exists,
+		Args:  cobra.ExactArgs(1),
+		Example: `podman pod exists podID
+  podman pod exists mypod || podman pod create --name mypod`,
+	}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: existsCommand,
+		Parent:  podCmd,
+	})
+}
+
+func exists(cmd *cobra.Command, args []string) error {
+	response, err := registry.ContainerEngine().PodExists(context.Background(), args[0])
+	if err != nil {
+		return err
+	}
+	if !response.Value {
+		os.Exit(1)
+	}
+	return nil
+}

pkg/domain/entities/engine_container.go

@@ -10,6 +10,7 @@ type ContainerEngine interface {
 	ContainerExists(ctx context.Context, nameOrId string) (*BoolReport, error)
 	ContainerWait(ctx context.Context, namesOrIds []string, options WaitOptions) ([]WaitReport, error)
 	PodDelete(ctx context.Context, opts PodPruneOptions) (*PodDeleteReport, error)
+	PodExists(ctx context.Context, nameOrId string) (*BoolReport, error)
 	PodPrune(ctx context.Context) (*PodPruneReport, error)
 	VolumeDelete(ctx context.Context, opts VolumeDeleteOptions) (*VolumeDeleteReport, error)
 	VolumePrune(ctx context.Context) (*VolumePruneReport, error)

pkg/domain/infra/abi/pods.go

@@ -0,0 +1,19 @@
+// +build ABISupport
+
+package abi
+
+import (
+	"context"
+	"github.com/pkg/errors"
+
+	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/pkg/domain/entities"
+)
+
+func (ic *ContainerEngine) PodExists(ctx context.Context, nameOrId string) (*entities.BoolReport, error) {
+	_, err := ic.Libpod.LookupPod(nameOrId)
+	if err != nil && errors.Cause(err) != define.ErrNoSuchPod {
+		return nil, err
+	}
+	return &entities.BoolReport{Value: err == nil}, nil
+}

pkg/domain/infra/tunnel/pods.go

@@ -0,0 +1,13 @@
+package tunnel
+
+import (
+	"context"
+
+	"github.com/containers/libpod/pkg/bindings/pods"
+	"github.com/containers/libpod/pkg/domain/entities"
+)
+
+func (ic *ContainerEngine) PodExists(ctx context.Context, nameOrId string) (*entities.BoolReport, error) {
+	exists, err := pods.Exists(ic.ClientCxt, nameOrId)
+	return &entities.BoolReport{Value: exists}, err
+}