2

src/loaders/packages.rs

@@ -1,4 +1,9 @@
+use std::fs;
 use crate::structs::Package;
+use std::error::Error;
+use serde::Serialize;
+use std::collections::HashMap;
+use std::process::Command;
 
 fn parse_dpkg_output(output: &str) -> Vec<Package> {
     output
@@ -12,25 +17,29 @@ fn parse_dpkg_output(output: &str) -> Vec<Package> {
         .collect()
 }
 
-use std::collections::HashMap;
-
 fn packages_to_hashmap(packages: &[Package]) -> HashMap<String, String> {
     packages.iter().map(|p| (p.name.clone(), p.version.clone())).collect()
 }
 
-#[derive(serde::Serialize)]
-struct PackagesWrapper<'a> {
-    packages: &'a HashMap<String, String>,
-}
+pub fn save_packages_to_toml(packages: &[Package], path: &str) -> Result<(), Box<dyn Error>> {
+    #[derive(Serialize)]
+    struct PackagesWrapper<'a> {
+        packages: &'a HashMap<String, String>,
+    }
 
-use std::fs;
-use std::error::Error;
-use serde::Serialize;
+    let pkg_map = packages_to_hashmap(packages);
+    let wrapper = PackagesWrapper { packages: &pkg_map };
 
-/// Save any serializable struct or collection into a TOML file.
-pub fn save_to_toml<T: Serialize>(data: &T, path: &str) -> Result<(), Box<dyn Error>> {
-    let toml_string = toml::to_string_pretty(data)?;
+    let toml_string = toml::to_string_pretty(&wrapper)?;
     fs::write(path, toml_string)?;
+
     Ok(())
 }
 
+pub fn get_installed_packages() -> Result<Vec<Package>, Box<dyn std::error::Error>> {
+    let output = Command::new("dpkg-query")
+        .args(&["-W"])
+        .output()?;
+    let stdout = String::from_utf8(output.stdout)?;
+    Ok(parse_dpkg_output(&stdout))
+}

src/main.rs

@@ -2,15 +2,18 @@ mod structs;
 mod loaders;
 
 use crate::loaders::sources::{load_sources, save_sources_to_toml};
+use crate::loaders::packages::{get_installed_packages, save_packages_to_toml};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Sources
     let sources = load_sources("/etc/apt/sources.list")?;
     save_sources_to_toml(&sources, "sources.toml")?;
     println!("Saved sources to sources.toml");
 
-    let pkg_map = packages_to_hashmap(&packages);
-    let wrapper = PackagesWrapper { packages: &pkg_map };
-    save_to_toml(&wrapper, "packages.toml")?;
+    // Packages
+    let packages = get_installed_packages()?;
+    save_packages_to_toml(&packages, "packages.toml")?;
+    println!("Saved packages to packages.toml");
 
     Ok(())
 }