doctor: use dbus for checking on services (#1384)

* doctor: use dbus for checking on services

* doctor: show docs URL for failed checks

* core: remove unused function

core/internal/utils/dbus.go

@@ -0,0 +1,20 @@
+package utils
+
+import (
+	"github.com/godbus/dbus/v5"
+)
+
+func IsDBusServiceAvailable(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 owned bool
+	if err := obj.Call("org.freedesktop.DBus.NameHasOwner", 0, busName).Store(&owned); err != nil {
+		return false
+	}
+	return owned
+}

core/internal/utils/exec.go

@@ -2,7 +2,6 @@ package utils
 
 import (
 	"os/exec"
-	"strings"
 )
 
 type AppChecker interface {
@@ -43,16 +42,3 @@ func AnyCommandExists(cmds ...string) bool {
 	}
 	return false
 }
-
-func IsServiceActive(name string, userService bool) bool {
-	if !CommandExists("systemctl") {
-		return false
-	}
-
-	args := []string{"is-active", name}
-	if userService {
-		args = []string{"--user", "is-active", name}
-	}
-	output, _ := exec.Command("systemctl", args...).Output()
-	return strings.EqualFold(strings.TrimSpace(string(output)), "active")
-}