Something awful I had to do

test_exec.js

/*
The situation was as follows:

- A project has a number of `.js` files under `dist/`
  - they're bundled by webpack for the browser
  - they're ES6 modules
- A `tools` folder contians commonjs `.js` files
- Want to run tests for files in `dist/` from a node script
  - test.js fails because it can't import ES6 modules

Things that didn't work:
- setting { "type": "module" } in package.json
  - commonjs files in `tools` would stop working
- various flags I tried in node.js
- migrating commonjs files to es6 modules
  - why should I have to?
- renaming all the files in `dist/` to `.mjs`
  - fuck that
*/

import { spawn } from 'child_process';
import * as fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const tempPackage =  path.join(__dirname, '../../dist/package.json');
fs.writeFileSync(tempPackage, `{ "type": "module" }\n`);

const s = spawn('node', [
    '--experimental-specifier-resolution=node',
    path.join(__dirname, 'test.js')]);

s.stdout.on('data', function (msg) {
    process.stdout.write(msg, (_err) => {});
})
s.stderr.on('data', function (msg) {
    process.stderr.write(msg, (_err) => {});
})

s.on('close', () => {
    // Oh yeah, need to wait a second or the hotloader
    // won't realize it's gone... EVEN AFTER subsequent
    // saves to other files.
    setTimeout(() => {
        fs.unlinkSync(tempPackage)
    }, 1000);
});