Reads a set of ts compiler errors and inserts ts-expect-error before all of them (has known off by one flaws)

expect-errors.mjs

import { readFileSync, writeFileSync } from 'fs';

const errors = readFileSync('./out.txt', 'utf-8')
  .split('\n')
  .filter(el => !el.startsWith('  '));

const parsedErrors = [];

for (const err of errors) {
  const [file] = err.split(':');
  const [path, lineNumRawDetails] = file.split('(');

  const parsedStringLineDetails = lineNumRawDetails.split(',');
  parsedStringLineDetails[1] = parsedStringLineDetails[1].slice(0, -1);

  const parsedNumberedLineDetails = parsedStringLineDetails.map(el => Number(el));
  const fullErrorDetails = {
    file: path,
    line: parsedNumberedLineDetails[0],
    column: parsedNumberedLineDetails[1],
  };

  parsedErrors.push(fullErrorDetails);
}

const fileTracker = {};
for (const err of parsedErrors) {
  const file = readFileSync(err.file, 'utf8').split('\n');
  
  file.splice(err.line - 1 + (fileTracker[err.file] ?? 0), 0, `// @ts-expect-error`);
  const joined = file.join('\n');

  writeFileSync(err.file, joined, { encoding: 'utf8' });

  if (fileTracker[err.file]) fileTracker[err.file]++;
  else fileTracker[err.file] = 1;

  console.log('modded ' + err.file + ' ' + err.line);
}