watch.js

// @ts-check
// Do not run this file directly, Run it via `npm run watch`. See package.json for more info.
const { spawn } = require("child_process");


/**
 * 
 * @param {string} program 
 * @param {string[]} args 
 * @returns {ReturnType<typeof spawn>}
 */
function cmd(program, args) {
  const spawnOptions = { "shell": true };
  console.log(`CMD:${program} ${args.flat()} ${spawnOptions}`)

  const p = spawn(program, args.flat(), spawnOptions);
  p.stdout.on("data", (data) => process.stdout.write(data));
  p.stderr.on("data", (data) => process.stdout.write(data));
  p.on("close", (code) => {
    if (code != 0) {
      console.error(program, args, "exited with", code);
    }
  });

  return p;
}

cmd("tsc", ["-w"]);
cmd("http-server", ["-p", "6969", "-a", "0.0.0.0", "-s", "-c-1"]);