fix hytop

1. 预先初始化DCU信息，初始化错误时直接退出
2. 修复pstree标头的string.Repeat数量可能为负的错误

cmd/hytop/main.go

@@ -42,9 +42,14 @@ func main() {
 		log.Fatalf("error init data backend: %v", err)
 	}
 	model := tui.NewModelMain(w, h)
-	if _, err := tea.NewProgram(&model, tea.WithAltScreen()).Run(); err != nil {
-		backend.Shutdown()
-		log.Fatalf("error create program; %v", err)
+	err = model.Prepare()
+	if err == nil {
+		if _, err := tea.NewProgram(&model, tea.WithAltScreen()).Run(); err != nil {
+			backend.Shutdown()
+			log.Fatalf("error create program; %v", err)
+		}
+	} else {
+		log.Println("init model error, dcu may be unhealthy")
 	}
 	backend.Shutdown()
 	os.Exit(0)

cmd/hytop/tui/main.go

@@ -133,9 +133,9 @@ func NewModelMain(width, height int) ModelMain {
 	result.dialog = NewDialog(nil)
 	result.pstree = NewModelPsTree(width, height)
 	result.actionMsg = &ActionMsg{
-		HelpView: false,
+		HelpView:       false,
 		TargetDCUIndex: -1,
-		VM: VMMain,
+		VM:             VMMain,
 	}
 	result.processEnv = nil
 	return result
@@ -153,12 +153,18 @@ func sendMsgCmd(modelMsg *ModelMsg) tea.Cmd {
 	}
 }
 
-// Init 初始化信息
-func (m *ModelMain) Init() tea.Cmd {
+// Prepare 准备数据
+func (m *ModelMain) Prepare() error {
 	modelMsg := ModelMsg{}
 	if err := initModelInfo(&modelMsg); err != nil {
-		return tea.Quit
+		return err
 	}
+	m.modelMsg = &modelMsg
+	return nil
+}
+
+// Init 初始化信息
+func (m *ModelMain) Init() tea.Cmd {
 	cmds := make([]tea.Cmd, 0)
 	if c := m.Header.Init(); c != nil {
 		cmds = append(cmds, c)
@@ -181,9 +187,9 @@ func (m *ModelMain) Init() tea.Cmd {
 	if c := m.processEnv.Init(); c != nil {
 		cmds = append(cmds, c)
 	}
-	m.modelMsg = &modelMsg
+
 	// 将调用初始化方法
-	cmds = append(cmds, tickCmd(), sendMsgCmd(&modelMsg))
+	cmds = append(cmds, tickCmd(), sendMsgCmd(m.modelMsg))
 	return tea.Batch(cmds...)
 }
 

cmd/hytop/tui/pstree.go

@@ -67,7 +67,7 @@ func (m *ModelPsTree) Init() tea.Cmd {
 	h2 := sb.String()
 	sb.Reset()
 	w := m.width - lipgloss.Width(h1) - lipgloss.Width(h2)
-	h := ModelPsTreeStyle.SetString(strings.Repeat(" ", w)).String()
+	h := ModelPsTreeStyle.SetString(strings.Repeat(" ", max(0, w))).String()
 	m.header[0] = h1 + h + h2
 
 	h1 = ModelPsTreeStyleL.SetString(ModelPsTreeHeader).String()