krypt-pkg 0.1.0

Package manager abstraction for the `krypt` dotfiles manager: pacman, apt, brew, scoop, winget, dnf.
Documentation 
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//! `brew` package manager implementation (macOS Homebrew).

use crate::manager::{PackageError, PackageManager, RunOutcome, Runner};

/// Package manager implementation for macOS (Homebrew).
pub struct Brew;

impl PackageManager for Brew {
    fn name(&self) -> &'static str {
        "brew"
    }

    fn is_available(&self) -> bool {
        which::which("brew").is_ok()
    }

    fn is_installed(&self, runner: &dyn Runner, pkg: &str) -> Result<bool, PackageError> {
        let RunOutcome { status, stdout, .. } =
            runner.run("brew", &["list", "--formula", "--versions", pkg])?;
        Ok(status == 0 && !stdout.trim().is_empty())
    }

    fn install(&self, runner: &dyn Runner, packages: &[String]) -> Result<(), PackageError> {
        let mut args = vec!["install"];
        let pkg_refs: Vec<&str> = packages.iter().map(String::as_str).collect();
        args.extend_from_slice(&pkg_refs);
        let RunOutcome { status, stderr, .. } = runner.run("brew", &args)?;
        if status != 0 {
            return Err(PackageError::ExitFailure { status, stderr });
        }
        Ok(())
    }
}