podmanV2: implement top

Implement the `top` command for podmanV2.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

4 files changed, 56 insertions, 0 deletions

diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index 545452948..fbc0247ab 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -22,6 +22,11 @@ type BoolReport struct {
 	Value bool
 }
 
+// StringSliceReport wraps a string slice.
+type StringSliceReport struct {
+	Value []string
+}
+
 type PauseUnPauseOptions struct {
 	All bool
 }
@@ -44,6 +49,16 @@ type StopReport struct {
 	Id  string
 }
 
+type TopOptions struct {
+	// CLI flags.
+	ListDescriptors bool
+	Latest          bool
+
+	// Options for the API.
+	Descriptors []string
+	NameOrID    string
+}
+
 type KillOptions struct {
 	All    bool
 	Latest bool
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 0217910fc..21a674c43 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -14,6 +14,8 @@ type ContainerEngine interface {
 	ContainerUnpause(ctx context.Context, namesOrIds []string, options PauseUnPauseOptions) ([]*PauseUnpauseReport, error)
 	ContainerStop(ctx context.Context, namesOrIds []string, options StopOptions) ([]*StopReport, error)
 	ContainerWait(ctx context.Context, namesOrIds []string, options WaitOptions) ([]WaitReport, error)
+	ContainerTop(ctx context.Context, options TopOptions) (*StringSliceReport, error)
+
 	PodExists(ctx context.Context, nameOrId string) (*BoolReport, error)
 	PodKill(ctx context.Context, namesOrIds []string, options PodKillOptions) ([]*PodKillReport, error)
 	PodPause(ctx context.Context, namesOrIds []string, options PodPauseOptions) ([]*PodPauseReport, error)
@@ -22,6 +24,7 @@ type ContainerEngine interface {
 	PodStop(ctx context.Context, namesOrIds []string, options PodStopOptions) ([]*PodStopReport, error)
 	PodRm(ctx context.Context, namesOrIds []string, options PodRmOptions) ([]*PodRmReport, error)
 	PodUnpause(ctx context.Context, namesOrIds []string, options PodunpauseOptions) ([]*PodUnpauseReport, error)
+
 	VolumeCreate(ctx context.Context, opts VolumeCreateOptions) (*IdOrNameResponse, error)
 	VolumeInspect(ctx context.Context, namesOrIds []string, opts VolumeInspectOptions) ([]*VolumeInspectReport, error)
 	VolumeRm(ctx context.Context, namesOrIds []string, opts VolumeRmOptions) ([]*VolumeRmReport, error)
diff --git a/pkg/domain/infra/abi/containers.go b/pkg/domain/infra/abi/containers.go
index 2e1a5aa82..3965c5f75 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -255,3 +255,25 @@ func (ic *ContainerEngine) ContainerInspect(ctx context.Context, namesOrIds []st
 	}
 	return reports, nil
 }
+
+func (ic *ContainerEngine) ContainerTop(ctx context.Context, options entities.TopOptions) (*entities.StringSliceReport, error) {
+	var (
+		container *libpod.Container
+		err       error
+	)
+
+	// Look up the container.
+	if options.Latest {
+		container, err = ic.Libpod.GetLatestContainer()
+	} else {
+		container, err = ic.Libpod.LookupContainer(options.NameOrID)
+	}
+	if err != nil {
+		return nil, errors.Wrap(err, "unable to lookup requested container")
+	}
+
+	// Run Top.
+	report := &entities.StringSliceReport{}
+	report.Value, err = container.Top(options.Descriptors)
+	return report, err
+}
diff --git a/pkg/domain/infra/tunnel/containers.go b/pkg/domain/infra/tunnel/containers.go
index 367ea6e36..3db38ea5c 100644
--- a/pkg/domain/infra/tunnel/containers.go
+++ b/pkg/domain/infra/tunnel/containers.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/containers/libpod/pkg/bindings/containers"
 	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/pkg/errors"
 )
 
 func (ic *ContainerEngine) ContainerExists(ctx context.Context, nameOrId string) (*entities.BoolReport, error) {
@@ -156,3 +157,18 @@ func (ic *ContainerEngine) ContainerInspect(ctx context.Context, namesOrIds []st
 	}
 	return reports, nil
 }
+
+func (ic *ContainerEngine) ContainerTop(ctx context.Context, options entities.TopOptions) (*entities.StringSliceReport, error) {
+	switch {
+	case options.Latest:
+		return nil, errors.New("latest is not supported")
+	case options.NameOrID == "":
+		return nil, errors.New("NameOrID must be specified")
+	}
+
+	topOutput, err := containers.Top(ic.ClientCxt, options.NameOrID, options.Descriptors)
+	if err != nil {
+		return nil, err
+	}
+	return &entities.StringSliceReport{Value: topOutput}, nil
+}