add install and remove packages to Backend trait

src/backend/mod.rs

@@ -7,8 +7,14 @@ use crate::Package;
 pub use pacman::Pacman;
 
 pub trait Backend {
+    /// The binary that should be called to run the associated package manager.
+    const BINARY: &'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>);
+    /// Remove the specified packages.
+    fn remove_packages(packages: Vec<Package>);
 }

src/backend/pacman.rs

@@ -1,4 +1,6 @@
 use std::collections::HashSet;
+use std::os::unix::process::CommandExt;
+use std::process::Command;
 
 use alpm::Alpm;
 use alpm::PackageReason::Explicit;
@@ -9,6 +11,8 @@ use crate::Package;
 pub struct Pacman;
 
 impl Backend for Pacman {
+    const BINARY: &'static str = "paru";
+
     fn get_all_installed_packages() -> HashSet<Package> {
         convert_to_pacdef_packages(get_all_installed_packages_from_alpm())
     }
@@ -16,6 +20,24 @@ impl Backend for Pacman {
     fn get_explicitly_installed_packages() -> HashSet<Package> {
         convert_to_pacdef_packages(get_explicitly_installed_packages_from_alpm())
     }
+
+    fn install_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new("paru");
+        cmd.arg("-S");
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+        cmd.exec();
+    }
+
+    fn remove_packages(packages: Vec<Package>) {
+        let mut cmd = Command::new("paru");
+        cmd.arg("-Rsn");
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+        cmd.exec();
+    }
 }
 
 fn get_all_installed_packages_from_alpm() -> HashSet<String> {

src/cmd.rs

@@ -1,11 +1,9 @@
-use std::os::unix::process::CommandExt;
 use std::path::PathBuf;
 use std::process::{Command, ExitStatus};
 
 use anyhow::{anyhow, Result};
 
 use crate::env::get_editor;
-use crate::Package;
 
 pub fn run_edit_command(files: &[PathBuf]) -> Result<ExitStatus> {
     let mut cmd = Command::new(get_editor()?);
@@ -14,21 +12,3 @@ pub fn run_edit_command(files: &[PathBuf]) -> Result<ExitStatus> {
     }
     cmd.status().map_err(|e| anyhow!(e))
 }
-
-pub fn run_install_command(diff: Vec<Package>) {
-    let mut cmd = Command::new("paru");
-    cmd.arg("-S");
-    for p in diff {
-        cmd.arg(format!("{p}"));
-    }
-    cmd.exec();
-}
-
-pub fn run_remove_command(unmanaged: Vec<Package>) {
-    let mut cmd = Command::new("paru");
-    cmd.arg("-Rsn");
-    for p in unmanaged {
-        cmd.arg(format!("{p}"));
-    }
-    cmd.exec();
-}

src/core.rs

@@ -6,7 +6,7 @@ use clap::ArgMatches;
 
 use crate::action;
 use crate::backend::{Backend, Pacman};
-use crate::cmd::{run_edit_command, run_install_command, run_remove_command};
+use crate::cmd::run_edit_command;
 use crate::ui::get_user_confirmation;
 use crate::Group;
 use crate::Package;
@@ -56,10 +56,9 @@ impl Pacdef {
         for p in &diff {
             println!("  {p}");
         }
-        println!();
         crate::ui::get_user_confirmation();
 
-        run_install_command(diff);
+        Pacman::install_packages(diff);
     }
 
     #[allow(clippy::unit_arg)]
@@ -138,6 +137,6 @@ impl Pacdef {
             println!("  {p}");
         }
         get_user_confirmation();
-        run_remove_command(unmanaged);
+        Pacman::remove_packages(unmanaged);
     }
 }