1234567891011121314151617181920212223242526272829303132
import { TextLineStream } from "./deps.ts";
export async function startFreshServer(options: Deno.CommandOptions) {  const serverProcess = new Deno.Command(Deno.execPath(), {    ...options,    stdin: "null",    stdout: "piped",    stderr: "inherit",  }).spawn();
  const decoder = new TextDecoderStream();  const lines: ReadableStream<string> = serverProcess.stdout    .pipeThrough(decoder)    .pipeThrough(new TextLineStream(), {      preventCancel: true,    });
  let address = "";  for await (const line of lines) {    const match = line.match(/https?:\/\/localhost:\d+/g);    if (match) {      address = match[0];      break;    }  }  if (!address) {    throw new Error("Server didn't start up");  }
  return { serverProcess, lines, address };}