piping for async sub process

const cmd = ["sh", "long-running-script"]

const proc = Deno.run({stdout: "piped" , cmd: cmd});

async function handleAll(){
    const decoder = new TextDecoder()
    const buf =new Uint8Array(10000);
    while (true){
    const n = await proc.stdout.read(buf)
    if (n === null){ break;}
    const outout = decoder.decode(buf)
    console.log(outout.slice(0,n));
    }
}

const promises = [handleAll() , proc.status()]

await Promise.allSettled(promises)

async function handleAll(){
    const output = await proc.stdout.pipeThrough((new TextDecoderStream()))
    console.dir(output)
}

async function handleAll() {
  const outputStream = await proc.stdout.readable.pipeThrough(
    new TextDecoderStream(),
  );
  const r = outputStream.getReader();
  let firstOutput = { done: false };
  while (!firstOutput.done) {
    firstOutput = await r.read();
    console.log(firstOutput);
  }
  return r;
}

async function handleAll() {
  const outputStream = await proc.stdout.readable.pipeThrough(
    new TextDecoderStream(),
  );
  for await (const firstOutput of outputStream) {
    console.log(firstOutput);
  }
}

let firstOut;
do {
  firstOut = await r.read();
} while (!firstOut.done);