rollup.config.js

import { nodeResolve } from "@rollup/plugin-node-resolve";
import { defineConfig } from "rollup";
import dts from "rollup-plugin-dts";
import esbuild from "rollup-plugin-esbuild";

export default defineConfig([
  define({ type: "dev" }),
  define({ type: "prod" }),
  define({ type: "server" }),
  defineTypes(),
]);

/** @returns {import('rollup').RollupOptions} */
function defineTypes() {
  return {
    input: {
      index: "types/index.d.ts",
    },
    output: {
      dir: "dist-npm",
      chunkFileNames: "dist-npm/types/maverick-[hash].d.ts",
      compact: false,
      minifyInternalExports: false,
    },
    plugins: [dts({ respectExternal: true })],
  };
}

/**
 * @typedef {{
 *   type: 'dev' | 'prod' | 'server'
 * }} BundleOptions
 */

/**
 * @param {BundleOptions}
 * @returns {import('rollup').RollupOptions}
 */
function define({ type = "dev" }) {
  const isDev = type === "dev";

  return {
    input: {
      index: "src/index.ts",
    },
    treeshake: true,
    preserveEntrySignatures: "allow-extension",
    external: ["react"],
    output: {
      format: "esm",
      dir: `dist-npm/${type}`,
      chunkFileNames: `chunks/maverick-[hash].js`,
      compact: false,
      minifyInternalExports: false,
    },
    plugins: [
      nodeResolve({
        exportConditions: isDev
          ? ["development", "production", "default"]
          : ["production", "default"],
      }),
      esbuild({
        define: {
          __DEV__: isDev ? "true" : "false",
          __SERVER__: type === "server" ? "true" : "false",
          __TEST__: "false",
        },
      }),
    ],
  };
}