Function detect_client_command

crates/cli/src/spacetime_config.rs:1132–1162

Simple auto-detection for projects without `spacetime.json`. Returns the client command and optionally the detected package manager.

(project_dir: &Path)

/// Simple auto-detection for projects without `spacetime.json`.
/// Returns the client command and optionally the detected package manager.
pub fn detect_client_command(project_dir: &Path) -> Option<(String, Option<PackageManager>)> {
    // JavaScript/TypeScript: package.json with "dev" script
    let package_json = project_dir.join("package.json");
    if package_json.exists()
        && let Ok(content) = fs::read_to_string(&package_json)
        && let Ok(json) = serde_json::from_str::<serde_json::Value>(&content)
    {
        let has_dev = json.get("scripts").and_then(|s| s.get("dev")).is_some();
        if has_dev {
            let pm = detect_package_manager(project_dir);
            let cmd = pm.map(|p| p.run_dev_command()).unwrap_or("npm run dev");
            return Some((cmd.to_string(), pm));
        }
    }

    // Rust: Cargo.toml
    if project_dir.join("Cargo.toml").exists() {
        return Some(("cargo run".to_string(), None));
    }

    // C#: .csproj file
    if let Ok(entries) = fs::read_dir(project_dir) {
        for entry in entries.flatten() {
            if entry.path().extension().is_some_and(|e| e == "csproj") {
                return Some(("dotnet run".to_string(), None));
            }
        }
    }

    None
}

#[cfg(test)]
mod tests {