rollup.config.ts

import resolve from "@rollup/plugin-node-resolve";
import commonjs from "@rollup/plugin-commonjs";
import sourceMaps from "rollup-plugin-sourcemaps";
import typescript from "rollup-plugin-typescript2";
import json from "@rollup/plugin-json";

const pkg = require("./package.json");

export default {
  input: `src/index.ts`,
  output: [
    {
      file: pkg.main,
      name: "compound-sdk",
      format: "umd",
      sourcemap: true,
    },
    { file: pkg.module, format: "es", sourcemap: true },
  ],
  // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
  external: [
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {}),
  ],
  watch: {
    include: "src/**",
  },
  plugins: [
    // Allow json resolution
    json(),
    // Compile TypeScript files
    typescript({
      useTsconfigDeclarationDir: true,
    }),
    // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
    commonjs({
      include: /node_modules/,
    }),
    // Allow node_modules resolution, so you can use 'external' to control
    // which external modules to include in the bundle
    // https://github.com/rollup/rollup-plugin-node-resolve#usage
    resolve({
      preferBuiltins: true,
    }),

    // Resolve source maps to the original source
    sourceMaps(),
  ],
  preserveSymlinks: true,
};