/**
 * Helper functions for checking if commands exist.
 *
 * @module
 */
/**
 * Helper function to check if a specific command exists on the system by attempting to resolve it
 * with the "which" library.
 */
export declare function commandExists(commandName: string): Promise<boolean>;
/**
 * Helper function to get the locally installed Python command. In most cases, this will be
 * "python", but on Ubuntu it will be "python3" (for legacy reasons). This is necessary to know if
 * JavaScript/TypeScript is launching Python.
 *
 * Returns undefined if Python is not installed on the system.
 *
 * @param fatal Whether to exit the program if Python is not found.
 */
export declare function getPythonCommand(fatal: true): Promise<"python" | "python3">;
export declare function getPythonCommand(fatal: false): Promise<"python" | "python3" | undefined>;
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