ESLint config for monorepos that adds support for importing from root package

.eslintrc.js

const fs = require('fs');
const glob = require('glob');

const { workspaces } = require('./package.json');

const noExtraneousOverrides = workspaces
  .map((workspace) => {
    return glob
      .sync(workspace)
      .filter((entry) => entry.substr(0, 1) !== '.' && fs.lstatSync(entry).isDirectory())
      .map((entry) => ({
        files: [`${entry}/**/*.ts`],
        rules: {
          'import/no-extraneous-dependencies': [
            'error',
            {
              devDependencies: true,
              optionalDependencies: false,
              peerDependencies: false,
              packageDir: [__dirname, entry],
            },
          ],
        },
      }));
  })
  .flat();

module.exports = {
  // ...
  overrides: [
    ...noExtraneousOverrides,
  ],
};