feat: add tail logs (#57)

pkg/app/action.go

@@ -169,6 +169,20 @@ var (
 		Mod:     gocui.ModNone,
 	}
 
+	tailLogsAction = &guilib.Action{
+		Keys:            keyMap[tailLogsActionName],
+		Name:            tailLogsActionName,
+		Handler:         tailLogsHandler,
+		Mod:             gocui.ModNone,
+	}
+
+	scrollLogsAction = &guilib.Action{
+		Keys:            keyMap[scrollLogsActionName],
+		Name:            scrollLogsActionName,
+		Handler:          scrollLogsHandler,
+		Mod:             gocui.ModNone,
+	}
+
 	runPodAction = &guilib.Action{
 		Keys:    keyMap[runPodActionName],
 		Name:    runPodActionName,
@@ -255,6 +269,28 @@ var (
 				},
 				Action: *changePodLogsContainerAction,
 			},
+			&moreAction{
+				NeedSelectResource: false,
+				ShowAction: func(gui *guilib.Gui, view *guilib.View) bool {
+					resourceName := resourceViewName(getViewResourceName(activeView.Name))
+					if resourceName == "" {
+						return false
+					}
+					return resourceLogAble(resourceName)
+				},
+				Action: *tailLogsAction,
+			},
+			&moreAction{
+				NeedSelectResource: false,
+				ShowAction: func(gui *guilib.Gui, view *guilib.View) bool {
+					resourceName := resourceViewName(getViewResourceName(activeView.Name))
+					if resourceName == "" {
+						return false
+					}
+					return resourceLogAble(resourceName)
+				},
+				Action: *scrollLogsAction,
+			},
 			&moreAction{
 				NeedSelectResource: false,
 				ShowAction: func(gui *guilib.Gui, view *guilib.View) bool {

pkg/app/handler.go

@@ -517,6 +517,26 @@ func changePodLogsContainerHandler(gui *guilib.Gui, view *guilib.View) error {
 	return nil
 }
 
+func tailLogsHandler(gui *guilib.Gui, view *guilib.View) error {
+	if err := view.SetState(ScrollingLogsStateKey, false, false); err != nil {
+		return err
+	}
+	if err := gui.FocusView(detailViewName, false); err != nil {
+		return err
+	}
+	return nil
+}
+
+func scrollLogsHandler(gui *guilib.Gui, view *guilib.View) error {
+	if err := view.SetState(ScrollingLogsStateKey, true, false); err != nil {
+		return err
+	}
+	if err := gui.FocusView(detailViewName, false); err != nil {
+		return err
+	}
+	return nil
+}
+
 func runPodHandler(gui *guilib.Gui, _ *guilib.View) error {
 	if err := showFilterDialog(
 		gui,

pkg/app/keymap.go

@@ -47,6 +47,8 @@ const (
 	deleteCustomResourcePanelActionName = "Delete custom resource panel"
 	containerExecCommandActionName      = "Execute the command"
 	changePodLogsContainerActionName    = "Change pod logs container"
+	tailLogsActionName                  = "Tail logs"
+	scrollLogsActionName                          = "Scroll logs"
 	runPodActionName                    = "Run a pod with an image"
 	changeContextActionName             = "Change context"
 )
@@ -89,6 +91,8 @@ var (
 		optionsDialogEnter:                  {gocui.KeyEnter},
 		inputDialogEnter:                    {gocui.KeyEnter},
 		changePodLogsContainerActionName:    {'c'},
+		tailLogsActionName:                  {'t'},
+		scrollLogsActionName:                          {'s'},
 		runPodActionName:                    {'r'},
 		changeContextActionName:             {'~'},
 	}

pkg/app/panel.go

@@ -161,6 +161,8 @@ var (
 				Mod:     gocui.ModNone,
 			},
 			changePodLogsContainerAction,
+			tailLogsAction,
+			scrollLogsAction,
 			newMoreActions(moreActionsMap[detailViewName]),
 		}),
 	}
@@ -317,6 +319,8 @@ var (
 	}
 
 	restartableResource = []string{"deployments", "statefulsets", "daemonsets"}
+
+	logAbleResource = []string{"deployment", "statefulset", "daemonset", "service", "pod"}
 )
 
 func getViewResourceName(viewName string) string {
@@ -517,3 +521,12 @@ func resourceRestartable(resource string) bool {
 	}
 	return false
 }
+
+func resourceLogAble(resource string) bool {
+	for _, logAble := range logAbleResource {
+		if resource == logAble {
+			return true
+		}
+	}
+	return false
+}

pkg/app/render.go

@@ -435,6 +435,19 @@ func onFocusClearSelected(gui *guilib.Gui, view *guilib.View) error {
 
 func podLogsRender(gui *guilib.Gui, view *guilib.View) error {
 	// Todo: Fix chinese character of logs.
+	scrollLogs := true
+	if val, _ := view.GetState(ScrollingLogsStateKey); val != nil {
+		var ok bool
+		scrollLogs, ok = val.(bool)
+		if !ok {
+			scrollLogs = true
+		}
+	}
+
+	if !scrollLogs {
+		return nil
+	}
+
 	podView, err := gui.GetView(podViewName)
 	if err != nil {
 		return err

pkg/app/statekey.go

@@ -8,6 +8,7 @@ const (
 	filterInputValueStateKey      = "filterInputValue"   // value type: string
 	confirmValueStateKey          = "confirmValue"       // value type: string
 	logSinceTimeStateKey          = "logSinceTime"       // value type: time.Time
+	ScrollingLogsStateKey         = "scrollingLogs"      // value type: boolean
 	podContainersStateKey         = "podContainers"      // value type: []string
 	logContainerStateKey          = "logContainer"       // value type: string
 )