@aak.lear/eslint-config/src/setup/configs/writeConfigs.js

This package simplifies the initial setup of eslint and prettier. It installs and apply eslint-config-airbnb to your project, also resolves peerDependencies that are required for eslint-config-airbnb package.

import { writeTemplate } from './writeTemplate.js';
import fs from 'fs';
import path from 'path';

export const writeConfigs = async ({
  root,
  extendsList,
  withTypescript,
  withPrettier,
}) => {
  const eslintConfig = { extends: extendsList };

  const writeTemplateToRoot = writeTemplate(root);

  if (withPrettier) {
    writeTemplateToRoot('.prettierrc');
  }

  if (withTypescript) {
    writeTemplateToRoot('tsconfig.eslint.json');

    eslintConfig.overrides = [
      {
        files: ['*.ts', '*.tsx'],
        parserOptions: {
          project: './tsconfig.eslint.json',
        },
      },
    ];
  }

  const eslintConfigPath = path.resolve(root, '.eslintrc.js');

  fs.writeFileSync(
    eslintConfigPath,
    `module.exports = ${JSON.stringify(eslintConfig, null, 2)}\n`,
  );
  console.log(`File created:\n${eslintConfigPath}\n`);
};