Revert "add more generic backend stuff"

This reverts commit 9044f1484b.

src/backend/mod.rs

@@ -8,50 +8,29 @@ use std::process::Command;
 use crate::Package;
 
 pub use pacman::Pacman;
-use rust::Rust;
-
-pub fn get_backends() -> Vec<Box<dyn Backend>> {
-    let pacman = Pacman;
-    let rust = Rust;
-    vec![Box::new(pacman), Box::new(rust)]
-}
-
 type Switches = &'static [&'static str];
 type Binary = &'static str;
 
 pub trait Backend {
     /// The binary that should be called to run the associated package manager.
-    fn get_binary() -> Binary
-    where
-        Self: Sized;
+    const BINARY: Binary;
 
     /// The switches that signals the `BINARY` that the packages should be installed.
-    fn get_switches_install() -> Switches
-    where
-        Self: Sized;
+    const SWITCHES_INSTALL: Switches;
 
     /// The switches that signals the `BINARY` that the packages should be removed.
-    fn get_switches_remove() -> Switches
-    where
-        Self: Sized;
+    const SWITCHES_REMOVE: Switches;
 
     /// Get all packages that are installed in the system.
-    fn get_all_installed_packages() -> HashSet<Package>
-    where
-        Self: Sized;
+    fn get_all_installed_packages() -> HashSet<Package>;
 
     /// Get all packages that were installed in the system explicitly.
-    fn get_explicitly_installed_packages() -> HashSet<Package>
-    where
-        Self: Sized;
+    fn get_explicitly_installed_packages() -> HashSet<Package>;
 
     /// Install the specified packages.
-    fn install_packages(packages: Vec<Package>)
-    where
-        Self: Sized,
-    {
-        let mut cmd = Command::new(Self::get_binary());
-        cmd.args(Self::get_switches_install());
+    fn install_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new(Self::BINARY);
+        cmd.args(Self::SWITCHES_INSTALL);
         for p in packages {
             cmd.arg(format!("{p}"));
         }
@@ -59,12 +38,9 @@ pub trait Backend {
     }
 
     /// Remove the specified packages.
-    fn remove_packages(packages: Vec<Package>)
-    where
-        Self: Sized,
-    {
-        let mut cmd = Command::new(Self::get_binary());
-        cmd.args(Self::get_switches_remove());
+    fn remove_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new(Self::BINARY);
+        cmd.args(Self::SWITCHES_REMOVE);
         for p in packages {
             cmd.arg(format!("{p}"));
         }

src/backend/pacman.rs

@@ -9,17 +9,9 @@ use crate::Package;
 pub struct Pacman;
 
 impl Backend for Pacman {
-    fn get_binary() -> Binary {
-        "paru"
-    }
-
-    fn get_switches_install() -> Switches {
-        &["-S"]
-    }
-
-    fn get_switches_remove() -> Switches {
-        &["-Rsn"]
-    }
+    const BINARY: Binary = "paru";
+    const SWITCHES_INSTALL: Switches = &["-S"];
+    const SWITCHES_REMOVE: Switches = &["-Rsn"];
 
     fn get_all_installed_packages() -> HashSet<Package> {
         convert_to_pacdef_packages(get_all_installed_packages_from_alpm())

src/backend/rust.rs

@@ -6,17 +6,9 @@ use crate::Package;
 pub struct Rust;
 
 impl Backend for Rust {
-    fn get_binary() -> Binary {
-        "cargo"
-    }
-
-    fn get_switches_install() -> Switches {
-        &["install"]
-    }
-
-    fn get_switches_remove() -> Switches {
-        &["uninstall"]
-    }
+    const BINARY: Binary = "cargo";
+    const SWITCHES_INSTALL: Switches = &["install"];
+    const SWITCHES_REMOVE: Switches = &["uninstall"];
 
     fn get_all_installed_packages() -> HashSet<Package> {
         extract_packages_names(&run_cargo_install_list())