Aur helper (#776)

* Arch Refactor

* Clippy

src/config.rs

@@ -180,10 +180,20 @@ pub struct Brew {
     greedy_cask: Option<bool>,
 }
 
+#[derive(Debug, Deserialize, Clone, Copy)]
+pub enum ArchPackageManager {
+    Autodetect,
+    Trizen,
+    Paru,
+    Yay,
+    Pacman,
+}
+
 #[derive(Deserialize, Default, Debug)]
 #[serde(deny_unknown_fields)]
 pub struct Linux {
     yay_arguments: Option<String>,
+    arch_package_manager: Option<ArchPackageManager>,
     trizen_arguments: Option<String>,
     dnf_arguments: Option<String>,
     apt_arguments: Option<String>,
@@ -630,6 +640,16 @@ impl Config {
             .unwrap_or("")
     }
 
+    /// Extra yay arguments
+    #[allow(dead_code)]
+    pub fn arch_package_manager(&self) -> ArchPackageManager {
+        self.config_file
+            .linux
+            .as_ref()
+            .and_then(|s| s.arch_package_manager)
+            .unwrap_or(ArchPackageManager::Autodetect)
+    }
+
     /// Extra yay arguments
     #[allow(dead_code)]
     pub fn yay_arguments(&self) -> &str {