rollup.config.js

import json from '@rollup/plugin-json';
import commonjs from 'rollup-plugin-commonjs';
import del from 'rollup-plugin-delete';
import ttypescript from 'ttypescript';
import typescript from 'rollup-plugin-typescript2';

// eslint-disable-next-line import/no-anonymous-default-export
export default {
  input: './index.ts',
  output: {
    dir: 'dist',
    format: 'cjs',
    sourcemap: process.env.BUILD === 'production' ? false : true,
  },
  plugins: [
    del({ targets: 'dist/*' }),
    typescript({
      typescript: ttypescript,
      tsconfig: 'tsconfig.json',
      tsconfigOverride: {
        exclude: ['./test/**'],
        // index.ts is included here and not in tsconfig.ts so relative imports
        // are imported correctly by VS Code.
        include: ['src', 'index.ts'],
        compilerOptions: {
          rootDir: './',
        },
      },
    }),
    json(),
    commonjs(),
  ],
};