show replicasets from deployment view (#3308)

Signed-off-by: Rudrakh Panigrahi <rudrakh97@gmail.com>

internal/view/dp.go

@@ -9,6 +9,7 @@ import (
 	"github.com/derailed/k9s/internal/client"
 	"github.com/derailed/k9s/internal/dao"
 	"github.com/derailed/k9s/internal/ui"
+	"github.com/derailed/tcell/v2"
 	appsv1 "k8s.io/api/apps/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
@@ -47,6 +48,7 @@ func (d *Deploy) bindKeys(aa *ui.KeyActions) {
 		ui.KeyShiftR: ui.NewKeyAction("Sort Ready", d.GetTable().SortColCmd(readyCol, true), false),
 		ui.KeyShiftU: ui.NewKeyAction("Sort UpToDate", d.GetTable().SortColCmd(uptodateCol, true), false),
 		ui.KeyShiftL: ui.NewKeyAction("Sort Available", d.GetTable().SortColCmd(availCol, true), false),
+		ui.KeyZ:      ui.NewKeyAction("ReplicaSets", d.replicaSetsCmd, true),
 	})
 }
 
@@ -63,6 +65,20 @@ func (d *Deploy) logOptions(prev bool) (*dao.LogOptions, error) {
 	return podLogOptions(d.App(), path, prev, &dp.ObjectMeta, &dp.Spec.Template.Spec), nil
 }
 
+func (d *Deploy) replicaSetsCmd(evt *tcell.EventKey) *tcell.EventKey {
+	dName := d.GetTable().GetSelectedItem()
+	if dName == "" {
+		return evt
+	}
+	dp, err := d.getInstance(dName)
+	if err != nil {
+		d.App().Flash().Err(err)
+		return nil
+	}
+	showReplicasetsFromSelector(d.App(), dName, dp.Spec.Selector)
+	return nil
+}
+
 func (d *Deploy) showPods(app *App, _ ui.Tabular, _ *client.GVR, fqn string) {
 	dp, err := d.getInstance(fqn)
 	if err != nil {
@@ -92,3 +108,13 @@ func showPodsFromSelector(app *App, path string, sel *metav1.LabelSelector) {
 
 	showPods(app, path, l, "")
 }
+
+func showReplicasetsFromSelector(app *App, path string, sel *metav1.LabelSelector) {
+	l, err := metav1.LabelSelectorAsSelector(sel)
+	if err != nil {
+		app.Flash().Err(err)
+		return
+	}
+
+	showReplicasets(app, path, l, "")
+}

internal/view/dp_test.go

@@ -17,5 +17,5 @@ func TestDeploy(t *testing.T) {
 
 	require.NoError(t, v.Init(makeCtx(t)))
 	assert.Equal(t, "Deployments", v.Name())
-	assert.Len(t, v.Hints(), 16)
+	assert.Len(t, v.Hints(), 17)
 }

internal/view/helpers.go

@@ -135,6 +135,23 @@ func describeResource(app *App, _ ui.Tabular, gvr *client.GVR, path string) {
 	}
 }
 
+func showReplicasets(app *App, path string, labelSel labels.Selector, fieldSel string) {
+	v := NewReplicaSet(client.RsGVR)
+	v.SetContextFn(func(ctx context.Context) context.Context {
+		ctx = context.WithValue(ctx, internal.KeyPath, path)
+		return context.WithValue(ctx, internal.KeyFields, fieldSel)
+	})
+	v.SetLabelSelector(labelSel)
+
+	ns, _ := client.Namespaced(path)
+	if err := app.Config.SetActiveNamespace(ns); err != nil {
+		slog.Error("Unable to set active namespace during show replicasets", slogs.Error, err)
+	}
+	if err := app.inject(v, false); err != nil {
+		app.Flash().Err(err)
+	}
+}
+
 func showPods(app *App, path string, labelSel labels.Selector, fieldSel string) {
 	v := NewPod(client.PodGVR)
 	v.SetContextFn(podCtx(app, path, fieldSel))