Function pick_integrations_interactive

src/agents/mod.rs:1350–1400

Interactively pick which agents to install/uninstall. - 0 detected agents → returns an error. - 1 detected and not already installed → returns it directly (no prompt). - Otherwise → asks a Y/n question for each detected agent. Returns `(to_install, to_uninstall)`.

(
    home: &Path,
    installed: &[String],
)

///
/// Returns `(to_install, to_uninstall)`.
pub fn pick_integrations_interactive(
    home: &Path,
    installed: &[String],
) -> Result<(Vec<String>, Vec<String>)> {
    let detected: Vec<Box<dyn AgentIntegration>> = all_integrations()
        .into_iter()
        .filter(|ag| ag.is_detected(home))
        .collect();

    if detected.is_empty() {
        return Err(TraceDecayError::Config {
            message: "No supported agents detected on this system".to_string(),
        });
    }

    // Fast path: exactly one detected agent and it isn't installed yet.
    if detected.len() == 1 && !installed.contains(&detected[0].id().to_string()) {
        let id = detected[0].id().to_string();
        return Ok((vec![id], vec![]));
    }

    let mut to_install = Vec::new();
    let mut to_uninstall = Vec::new();

    for ag in &detected {
        let id = ag.id().to_string();
        let already = installed.contains(&id);
        if already {
            eprint!("Keep TraceDecay for {}? [Y/n] ", ag.name());
        } else {
            eprint!("Install TraceDecay for {}? [Y/n] ", ag.name());
        }

        let mut input = String::new();
        std::io::stdin()
            .read_line(&mut input)
            .map_err(|e| TraceDecayError::Config {
                message: format!("failed to read input: {e}"),
            })?;
        let answer = input.trim().to_lowercase();
        let yes = answer.is_empty() || answer == "y" || answer == "yes";

        if yes && !already {
            to_install.push(id);
        } else if !yes && already {
            to_uninstall.push(id);
        }
    }

    Ok((to_install, to_uninstall))
}

/// Load a TOML file as a document.
///