make arch report actual binary in use

crates/pacdef_core/src/backend/actual/arch.rs

@@ -15,7 +15,7 @@ pub struct Arch {
     pub(crate) packages: HashSet<Package>,
 }
 
-const BINARY: Text = "paru";
+const BINARY: Text = "pacman";
 const SECTION: Text = "arch";
 
 const SWITCHES_INFO: Switches = &["--query", "--info"];
@@ -26,6 +26,11 @@ const SWITCHES_REMOVE: Switches = &["--remove", "--recursive"];
 impl Backend for Arch {
     impl_backend_constants!();
 
+    fn get_binary_inner(&self) -> Text {
+        let r#box = self.binary.clone().into_boxed_str();
+        Box::leak(r#box)
+    }
+
     fn get_all_installed_packages(&self) -> Result<HashSet<Package>> {
         let alpm_packages = get_all_installed_packages_from_alpm()
             .context("getting all installed packages from alpm")?;

crates/pacdef_core/src/backend/backend_trait.rs

@@ -13,6 +13,9 @@ pub(in crate::backend) type Text = &'static str;
 
 pub trait Backend: Debug {
     fn get_binary(&self) -> Text;
+    fn get_binary_inner(&self) -> Text {
+        self.get_binary()
+    }
     fn get_section(&self) -> Text;
 
     fn get_switches_info(&self) -> Switches;