doctor: add cups-pk-helper

core/cmd/dms/commands_doctor.go

@@ -689,6 +689,19 @@ func checkOptionalDependencies() []checkResult {
 	logindStatus, logindMsg := getOptionalDBusStatus("org.freedesktop.login1")
 	results = append(results, checkResult{catOptionalFeatures, "logind", logindStatus, logindMsg, "Session management", optionalFeaturesURL})
 
+	cupsPkHelperBus := "org.opensuse.CupsPkHelper.Mechanism"
+	var cupsPkStatus status
+	var cupsPkMsg string
+	switch {
+	case utils.IsDBusServiceAvailable(cupsPkHelperBus):
+		cupsPkStatus, cupsPkMsg = statusOK, "Running"
+	case utils.IsDBusServiceActivatable(cupsPkHelperBus):
+		cupsPkStatus, cupsPkMsg = statusOK, "Available"
+	default:
+		cupsPkStatus, cupsPkMsg = statusWarn, "Not available (install cups-pk-helper)"
+	}
+	results = append(results, checkResult{catOptionalFeatures, "cups-pk-helper", cupsPkStatus, cupsPkMsg, "Printer management", optionalFeaturesURL})
+
 	results = append(results, checkI2CAvailability())
 
 	terminals := []string{"ghostty", "kitty", "alacritty", "foot", "wezterm"}

core/internal/utils/dbus.go

@@ -1,6 +1,8 @@
 package utils
 
 import (
+	"slices"
+
 	"github.com/godbus/dbus/v5"
 )
 
@@ -18,3 +20,18 @@ func IsDBusServiceAvailable(busName string) bool {
 	}
 	return owned
 }
+
+func IsDBusServiceActivatable(busName string) bool {
+	conn, err := dbus.ConnectSystemBus()
+	if err != nil {
+		return false
+	}
+	defer conn.Close()
+
+	obj := conn.Object("org.freedesktop.DBus", "/org/freedesktop/DBus")
+	var activatable []string
+	if err := obj.Call("org.freedesktop.DBus.ListActivatableNames", 0).Store(&activatable); err != nil {
+		return false
+	}
+	return slices.Contains(activatable, busName)
+}