Function spawnAsync

src/util.ts:517–554

(command: string, args?: ReadonlyArray<string>, options?: cp.CommonOptions, onDisposed?: () => unknown)

}

export async function spawnAsync(command: string, args?: ReadonlyArray<string>, options?: cp.CommonOptions, onDisposed?: () => unknown): Promise<cp.SpawnSyncReturns<string>> {
    return new Promise((resolve) => {

        const result: cp.SpawnSyncReturns<string> = {
            error: undefined,
            pid: -1,
            output: [],
            stdout: '',
            stderr: '',
            status: null,
            signal: null
        };

        try {
            const childProcess = spawn(command, args, options, onDisposed);
            if (childProcess.pid !== undefined) {
                result.pid = childProcess.pid;
            }
            childProcess.stdout?.on('data', (chunk: Buffer) => {
                result.stdout += chunk.toString();
            });
            childProcess.stderr?.on('data', (chunk: Buffer) => {
                result.stderr += chunk.toString();
            });
            childProcess.on('error', (err: Error) => {
                result.error = err;
            });
            childProcess.on('exit', (code, signal) => {
                result.status = code;
                result.signal = signal;
                resolve(result);
            });
        } catch (e) {
            result.error = (e instanceof Error) ? e : undefined;
            resolve(result);
        }
    });
}

/**
 * Check if an R package is available or not