packages/data-provider/rollup.config.js

import typescript from 'rollup-plugin-typescript2';
import resolve from '@rollup/plugin-node-resolve';
import pkg from './package.json';

export default [
  {
    input: 'src/index.ts',
    output: [
      {
        file: pkg.main,
        format: 'cjs',
      },
      {
        file: pkg.module,
        format: 'esm',
      },
    ],
    ...{
      external: [
        ...Object.keys(pkg.dependencies || {}),
        ...Object.keys(pkg.devDependencies || {}),
        ...Object.keys(pkg.peerDependencies || {}),
      ],
      preserveSymlinks: true,
      plugins: [
        resolve(),
        typescript({ useTsconfigDeclarationDir: true, tsconfig: './tsconfig.json' }),
      ],
    },
  },
];