Function restore_from_cache

src/executor/helpers/apt.rs:117–172

Restore cached tools from the cache directory to the root filesystem

(system_info: &SystemInfo, cache_dir: &Path)

/// Restore cached tools from the cache directory to the root filesystem
fn restore_from_cache(system_info: &SystemInfo, cache_dir: &Path) -> Result<()> {
    if !is_system_compatible(system_info) {
        info!("Cache restore is not supported on this system, skipping");
        return Ok(());
    }

    if !cache_dir.exists() {
        debug!("Cache directory does not exist: {}", cache_dir.display());
        return Ok(());
    }

    // Check if the directory has any contents
    let has_contents = std::fs::read_dir(cache_dir)
        .map(|mut entries| entries.next().is_some())
        .unwrap_or(false);

    if !has_contents {
        debug!("Cache directory is empty: {}", cache_dir.display());
        return Ok(());
    }

    debug!(
        "Restoring tools from cache directory: {}",
        cache_dir.display()
    );

    // Read and log the metadata file if it exists
    let metadata_path = cache_dir.join(METADATA_FILENAME);
    if metadata_path.exists() {
        match std::fs::read_to_string(&metadata_path) {
            Ok(content) => {
                info!(
                    "Packages restored from cache: {}",
                    content.lines().join(", ")
                );
            }
            Err(e) => {
                warn!("Failed to read metadata file: {e}");
            }
        }
    } else {
        debug!("No metadata file found in cache directory");
    }

    // Use bash to properly handle glob expansion
    let cache_dir_str = cache_dir
        .to_str()
        .ok_or_else(|| anyhow!("Invalid cache directory path"))?;

    // IMPORTANT: We have to use 'bash' here to ensure that glob patterns are expanded correctly
    let copy_cmd = format!("cp -r {cache_dir_str}/* /");
    run_with_sudo("bash", ["-c", &copy_cmd])?;

    debug!("Cache restored successfully");
    Ok(())
}

/// Save installed packages to the cache directory