Add ability to remove unused packages

src/main.rs

@@ -32,7 +32,23 @@ fn main() {
         return;
     }
 
-    notice_println("Move onto something else");
+    notice_println("Getting orphaned packages");
+    let result = match pacman_api::get_unused() {
+        Ok(result) => result,
+        Err(e) => {
+            error_println(e.to_string());
+            return;
+        }
+    };
+
+    if result.is_empty() {
+        println!("No Orphaned Packages Found.")
+    } else if let Err(e) = pacman_api::remove_unused(result) {
+        error_println(e.to_string());
+        return;
+    }
+
+    notice_println("Do Something Else");
 }
 
 fn copyright_notice() -> ColoredString {

src/pacman_api.rs

@@ -11,17 +11,18 @@
     This module provides an api to make working with Pacman much easier.
 */
 
-use std::{error, fmt};
+use std::{error, fmt, io};
 use std::fmt::Formatter;
 use std::io::Read;
 use std::path::Path;
 
 use crate::shell_commands;
 
-#[derive(Debug, Clone)]
+#[derive(Debug)]
 pub enum PacmanError {
     InsufficientPrivilege,
     NotInstalled,
+    IoError(io::Error),
     Other(String),
 }
 
@@ -31,6 +32,7 @@ impl fmt::Display for PacmanError {
             PacmanError::InsufficientPrivilege => "Failed to run pacman. Maybe try sudo?",
             PacmanError::NotInstalled => "Unable to find pacman. Is this system arch based?",
             PacmanError::Other(msg) => msg,
+            _ => "Unexpected Error Occurred",
         };
 
         write!(f, "{}", output)
@@ -42,7 +44,7 @@ impl error::Error for PacmanError {}
 pub fn check() -> Result<(), PacmanError> {
     let out = match shell_commands::execute_quiet("which", ["pacman"]) {
         Ok(out) => out,
-        Err(e) => return Err(PacmanError::Other(e.to_string())),
+        Err(e) => return Err(PacmanError::IoError(e)),
     };
 
     let path = if out.status.success() {
@@ -67,9 +69,9 @@ pub fn check() -> Result<(), PacmanError> {
 }
 
 pub fn update_all() -> Result<(), PacmanError> {
-    let out = match shell_commands::execute_in_sh("pacman -Syu") {
+    let out = match shell_commands::execute_in_sh("sudo pacman -Syu") {
         Ok(out) => out,
-        Err(e) => return Err(PacmanError::Other(e.to_string())),
+        Err(e) => return Err(PacmanError::IoError(e)),
     };
 
     let mut child_stderr = match out.stderr {
@@ -90,3 +92,33 @@ pub fn update_all() -> Result<(), PacmanError> {
         Err(PacmanError::Other(stderr_out))
     }
 }
+
+#[derive(Debug)]
+struct GetUnusedStatus {}
+
+pub fn get_unused() -> Result<String, PacmanError> {
+    let out = match shell_commands::execute_quiet("pacman", ["-Qtdq"]) {
+        Ok(out) => out,
+        Err(e) => return Err(PacmanError::IoError(e)),
+    };
+
+    let result = match String::from_utf8(out.stdout) {
+        Ok(out) => out,
+        Err(e) => return Err(PacmanError::Other(e.to_string())),
+    };
+
+    Ok(result)
+}
+
+pub fn remove_unused(packages: String) -> Result<(), PacmanError> {
+    let command = format!("sudo pacman -Rns {}", packages);
+
+    let out = match shell_commands::execute_in_sh(command) {
+        Ok(out) => out,
+        Err(e) => return Err(PacmanError::IoError(e)),
+    };
+
+    dbg!(&out);
+
+    Ok(())
+}

src/shell_commands.rs

@@ -30,8 +30,8 @@ where
     Ok(child)
 }
 
-pub fn execute_in_sh(cmd: &'static str) -> io::Result<Child> {
+pub fn execute_in_sh(cmd: impl Into<String>) -> io::Result<Child> {
-    execute_and_display("sh", ["-c", cmd])
+    execute_and_display("sh", ["-c", &cmd.into()])
 }
 
 pub fn execute_quiet<S: AsRef<OsStr>, I>(cmd: S, args: I) -> io::Result<Output>