Arch Linux — Pacman

The Pacman backend is implemented across two files:

• src/managers/pacman.rs — low-level wrappers around the pacman CLI
• src/managers/arch.rs — ArchManager struct that implements PackageManager by composing Pacman and the AUR helper

ArchManager

ArchManager is constructed with an aur_helper string (default: "yay", configurable in config.toml):

#![allow(unused)]
fn main() {
pub struct ArchManager {
    pub aur_helper: String,
}
}

It implements PackageManager by delegating to pacman::* and yay::* functions.

Search

ArchManager::search merges results from both pacman -Ss and the AUR helper, sorts by fuzzy score, and truncates to 50 results:

#![allow(unused)]
fn main() {
fn search(&self, query: &str) -> Vec<Package> {
    let mut all = pacman::search_pacman(query);
    all.extend(yay::search_aur(query, &self.aur_helper));
    all.sort_by(|a, b| b.score.partial_cmp(&a.score).unwrap_or(Equal));
    all.truncate(50);
    all
}
}

search_pacman calls pacman -Ss <query> and parses the alternating-line output via parse_alternating_lines.

Package Details

pacman_info first tries pacman -Si <pkg> (remote package info), then falls back to pacman -Qi <pkg> (locally installed info). The colon-separated key-value output is parsed into a HashMap<String, String>.

Results are cached in DETAILS_CACHE to avoid repeated subprocess calls.

Installed Packages

get_installed_packages() runs pacman -Q and returns a HashSet<String> of package names. get_installed_packages_details() runs pacman -Q and constructs Package structs from the name-version pairs.

Updates

get_updates() runs pacman -Qu to list packages with newer versions available and returns them as Vec<Package>.

Install / Remove

pacman -S <packages>   # install
pacman -Rns <packages> # remove with unused dependencies

Both require sudo and hand control of the terminal to the interactive pacman output via execute_external_command.

System Upgrade & Refresh