add status command

README.md

@@ -19,6 +19,8 @@ user-facing configuration UI is expected to live in `ximperconf shell panel`.
 ximper-shell-panel list-modules
 ximper-shell-panel list-modules -o json
 ximper-shell-panel start
+ximper-shell-panel status
+ximper-shell-panel status -o json
 ximper-shell-panel stop
 ximper-shell-panel toggle
 ximper-shell-panel restart

main.go

@@ -48,6 +48,19 @@ func main() {
 				Action: startCommand,
 			},
 			{
+				Name:   "status",
+				Usage:  "Show panel runtime status",
+				Action: statusCommand,
+				Flags: []cli.Flag{
+					&cli.StringFlag{
+						Name:    "format",
+						Usage:   "output format (text, json)",
+						Value:   "text",
+						Aliases: []string{"o"},
+					},
+				},
+			},
+			{
 				Name:   "stop",
 				Usage:  "Stop the running panel",
 				Action: stopCommand,
@@ -131,6 +144,36 @@ func startCommand(ctx context.Context, cmd *cli.Command) error {
 	return StartWaybar()
 }
 
+func statusCommand(ctx context.Context, cmd *cli.Command) error {
+	status := GetPanelStatus()
+	switch cmd.String("format") {
+	case "json":
+		data, err := json.MarshalIndent(status, "", "  ")
+		if err != nil {
+			return err
+		}
+		fmt.Println(string(data))
+	case "text":
+		running := "no"
+		if status.Running {
+			running = "yes"
+		}
+		fmt.Println("Running:", running)
+		if status.PID != nil {
+			fmt.Println("PID:", *status.PID)
+		}
+		fmt.Println("Runtime dir:", status.RuntimeDir)
+		safeMode := "no"
+		if status.SafeMode {
+			safeMode = "yes"
+		}
+		fmt.Println("Safe mode:", safeMode)
+	default:
+		return fmt.Errorf("unsupported output format %q", cmd.String("format"))
+	}
+	return nil
+}
+
 func stopCommand(ctx context.Context, cmd *cli.Command) error {
 	return StopWaybar()
 }

runner.go

@@ -12,6 +12,13 @@ import (
 	"time"
 )
 
+type PanelStatus struct {
+	Running    bool   `json:"running"`
+	PID        *int   `json:"pid"`
+	RuntimeDir string `json:"runtime_dir"`
+	SafeMode   bool   `json:"safe_mode"`
+}
+
 func StartWaybar() error {
 	if PanelIsRunning() {
 		return nil
@@ -65,15 +72,27 @@ func RestartWaybar() error {
 }
 
 func PanelIsRunning() bool {
+	return GetPanelStatus().Running
+}
+
+func GetPanelStatus() PanelStatus {
+	status := PanelStatus{
+		RuntimeDir: RuntimeDir(),
+		SafeMode:   SafeMode(),
+	}
+
 	pid, err := readPID()
 	if err != nil {
-		return false
+		return status
 	}
-	if isPanelProcess(pid) {
-		return true
+	if !isPanelProcess(pid) {
+		_ = os.Remove(RuntimePIDPath())
+		return status
 	}
-	_ = os.Remove(RuntimePIDPath())
-	return false
+
+	status.Running = true
+	status.PID = &pid
+	return status
 }
 
 func stopWaybar() error {