fix: improve error handling and prevent nil pointer dereference

config/dbus.go

 package config
 
 import (
-	"log"
-
 	"github.com/godbus/dbus/v5"
 )
 
 var DBusConn *dbus.Conn
 
-func InitDBus() {
+func InitDBus() error {
 	var err error
 	DBusConn, err = dbus.SystemBus()
 	if err != nil {
-		log.Fatalf("failed to connect to system bus: %v", err)
+		return err
 	}
+	return nil
 }

hyprland/actions.go

@@ -95,7 +95,8 @@ func HyprlandCheck(configPath string) ([]HyprConfigError, error) {
 func HyprlandCheckCommand(ctx context.Context, cmd *cli.Command) error {
 	h := config.Env.Hyprland
 	if h == nil || h.Config == "" {
-		fmt.Println("")
+		color.Red("Hyprland не настроен")
+		return nil
 	}
 
 	result, err := HyprlandCheck(h.Config)

hyprland/keyboard-actions.go

@@ -11,6 +11,9 @@ import (
 )
 
 func HyprlandGetKeyboardLayouts() (string, error) {
+	if config.DBusConn == nil {
+		return "", fmt.Errorf("DBus недоступен")
+	}
 	obj := config.DBusConn.Object("org.freedesktop.locale1", "/org/freedesktop/locale1")
 
 	variant := dbus.Variant{}

main.go

@@ -15,8 +15,9 @@ import (
 func main() {
 
 	config.InitConfig()
-	config.InitDBus()
-	defer config.DBusConn.Close()
+	if err := config.InitDBus(); err == nil {
+		defer config.DBusConn.Close()
+	}
 
 	rootCommand := &cli.Command{
 		Name:                  "ximperconf",

repo/actions.go

 package repo
 
 import (
-	"ximperconf/config"
-
 	"context"
 	"fmt"
 	"io"
 	"net/http"
-	"os"
 	"regexp"
 
+	"ximperconf/config"
+
 	"github.com/fatih/color"
 	"github.com/urfave/cli/v3"
 )
@@ -19,20 +18,18 @@ var (
 	reArchiveDate = regexp.MustCompile(`Sisyphus archive date: ([0-9\-]+)`)
 )
 
-func deferredGetHTML() string {
+func deferredGetHTML() (string, error) {
 	resp, err := http.Get(config.Env.Repo.DeferredInfoURL)
 	if err != nil {
-		color.Red("Ошибка получения данных")
-		os.Exit(1)
+		return "", fmt.Errorf("ошибка получения данных: %w", err)
 	}
 	defer resp.Body.Close()
 
 	data, err := io.ReadAll(resp.Body)
 	if err != nil {
-		color.Red("Ошибка получения данных")
-		os.Exit(1)
+		return "", fmt.Errorf("ошибка чтения данных: %w", err)
 	}
-	return string(data)
+	return string(data), nil
 }
 
 func deferredLastUpdate(html string) string {
@@ -43,7 +40,11 @@ func deferredLastUpdate(html string) string {
 }
 
 func DeferredLastUpdateCommand(ctx context.Context, cmd *cli.Command) error {
-	html := deferredGetHTML()
+	html, err := deferredGetHTML()
+	if err != nil {
+		color.Red(err.Error())
+		return err
+	}
 
 	lastUpdate := deferredLastUpdate(html)
 	fmt.Println(lastUpdate)
@@ -59,7 +60,11 @@ func deferredArchiveDate(html string) string {
 }
 
 func DeferredArchiveDateCommand(ctx context.Context, cmd *cli.Command) error {
-	html := deferredGetHTML()
+	html, err := deferredGetHTML()
+	if err != nil {
+		color.Red(err.Error())
+		return err
+	}
 
 	archiveDate := deferredArchiveDate(html)
 	fmt.Println(archiveDate)
@@ -68,7 +73,11 @@ func DeferredArchiveDateCommand(ctx context.Context, cmd *cli.Command) error {
 }
 
 func DeferredInfoCommand(ctx context.Context, cmd *cli.Command) error {
-	html := deferredGetHTML()
+	html, err := deferredGetHTML()
+	if err != nil {
+		color.Red(err.Error())
+		return err
+	}
 
 	lastUpdate := deferredLastUpdate(html)
 	archiveDate := deferredArchiveDate(html)

system/commands.go

@@ -16,8 +16,7 @@ func CommandList() *cli.Command {
 		Usage:  "System Management",
 		Before: func(ctx context.Context, command *cli.Command) (context.Context, error) {
 			if !config.Env.IsRoot {
-				fmt.Printf("Эта команда требует root.\n")
-				return nil, fmt.Errorf("")
+				return nil, fmt.Errorf("эта команда требует root")
 			}
 			return ctx, nil
 		},