complete Pacman backend

src/backend/mod.rs

@@ -1,6 +1,8 @@
 mod pacman;
 
 use std::collections::HashSet;
+use std::os::unix::process::CommandExt;
+use std::process::Command;
 
 use crate::Package;
 
@@ -9,12 +11,36 @@ pub use pacman::Pacman;
 pub trait Backend {
     /// The binary that should be called to run the associated package manager.
     const BINARY: &'static str;
+
+    /// The switches that signals the `BINARY` that the packages should be installed.
+    const SWITCH_INSTALL: &'static str;
+
+    /// The switches that signals the `BINARY` that the packages should be removed.
+    const SWITCH_REMOVE: &'static str;
+
     /// Get all packages that are installed in the system.
     fn get_all_installed_packages() -> HashSet<Package>;
+
     /// Get all packages that were installed in the system explicitly.
     fn get_explicitly_installed_packages() -> HashSet<Package>;
+
     /// Install the specified packages.
-    fn install_packages(packages: Vec<Package>);
+    fn install_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new(Self::BINARY);
+        cmd.arg(Self::SWITCH_INSTALL);
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+        cmd.exec();
+    }
+
     /// Remove the specified packages.
-    fn remove_packages(packages: Vec<Package>);
+    fn remove_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new(Self::BINARY);
+        cmd.arg(Self::SWITCH_REMOVE);
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+        cmd.exec();
+    }
 }