nixy-rs 0.1.0

Homebrew-style wrapper for Nix using flake.nix
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use crate::config::Config;
use crate::error::{Error, Result};
use crate::nix::Nix;
use crate::profile::get_flake_path;

use super::info;

pub fn run(config: &Config) -> Result<()> {
    let flake_path = get_flake_path(config);

    if !flake_path.exists() {
        return Err(Error::NoFlakeFound(flake_path.display().to_string()));
    }

    info(&format!("Packages in {}:", flake_path.display()));

    let flake_dir = flake_path
        .parent()
        .ok_or_else(|| Error::NoFlakeFound(flake_path.display().to_string()))?;
    let packages = Nix::eval_packages(flake_dir)?;

    if packages.is_empty() {
        println!("  (none)");
    } else {
        for pkg in packages {
            println!("  {}", pkg);
        }
    }

    Ok(())
}