import { ChildProcess, SpawnSyncOptionsWithBufferEncoding, SpawnSyncReturns, spawnSync as rawSpawnSync } from "child_process";

export function check(result: SpawnSyncReturns<Buffer | string>) {
    if (result.error)
        throw result.error;
    if (result.status !== 0) {
        throw result.stderr;
    }
    return result;
}

export function checkedSpawnSync(
    command: string,
    args: readonly string[],
    options: SpawnSyncOptionsWithBufferEncoding,
): SpawnSyncReturns<Buffer | string> {
    return check(rawSpawnSync(command, args, options));
}

export function promisifySpawn<T extends ChildProcess>(p: T) {
    return new Promise<T>((resolve, reject) => {
        p.on("error", err => reject(err));
        p.on("close", number => {
            if (number != 0) return reject(number);
            resolve(p);
        });
    });
}