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use tokio::process::Command;

use super::super::packages::*;

#[derive(Default)]
pub struct Dnf;

impl Dnf {
    pub fn new() -> Self {
        Default::default()
    }
}

#[async_trait]
impl Backend for Dnf {
    fn name(&self) -> Cow<'static, str> {
        "dnf".into()
    }

    async fn get_updates_list(&self) -> Result<Vec<String>> {
        let stdout = Command::new("sh")
            .env("LC_LANG", "C")
            .args(["-c", "dnf check-update -q --skip-broken"])
            .output()
            .await
            .error("Failed to run dnf check-update")?
            .stdout;
        let updates = String::from_utf8(stdout).error("dnf produced non-UTF8 output")?;
        let updates: Vec<String> = updates
            .lines()
            .filter(|line| line.len() > 1)
            .map(|lines| lines.to_string())
            .collect();

        Ok(updates)
    }
}