warren-cli 0.1.5

use std::path::Path;
use anyhow::{Result, bail, Context};
use flate2::write::GzEncoder;
use flate2::Compression;

use crate::config::WarrenConfig;
use crate::instance::InstanceLayout;
use crate::ui::theme::Theme;

pub async fn execute(config: &WarrenConfig, theme: &Theme, alias: &str, out: Option<&Path>) -> Result<()> {
    let layout = InstanceLayout::new(&config.paths.instances_dir, alias);
    if !layout.exists() { bail!("instance '{}' not found", alias); }
    let output_path = out
        .map(|p| p.to_path_buf())
        .unwrap_or_else(|| std::env::current_dir().unwrap().join(format!("{}.warren.tar.gz", alias)));
    theme.step("📦", &format!("Exporting {} to {}", alias, output_path.display()));
    let file = std::fs::File::create(&output_path)
        .with_context(|| format!("failed to create archive {}", output_path.display()))?;
    let enc = GzEncoder::new(file, Compression::default());
    let mut tar = tar::Builder::new(enc);
    tar.append_dir_all(alias, &layout.root)
        .with_context(|| format!("failed to create archive for instance '{}'", alias))?;
    tar.finish()?;
    theme.success(&format!("Exported: {}", output_path.display()));
    Ok(())
}