/**
 * Executes a command.
 *
 * Uses a simpler calling method than `spawn`.
 *
 * trim the result for consistency.
 *
 * `silent` option makes it so that the command does not output to the console.
 */
export declare function exec(cmd: string, { silent }?: {
    silent?: boolean;
}): string;
/**
 * Spawn a command to execute.
 *
 * Returns a stream for `stdout` and `stderr`. Allow for putting data into
 * it from `{ value }` in options.
 */
export declare function spawn(cmd: string, args: string[], { value }?: {
    value?: string;
}): {
    stdout: string;
    stderr: string;
};