@inrupt/base-rollup-config/index.mjs

This package provides a shared rollup config for our packages

// Copyright Inrupt Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
// Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

import typescript from "@rollup/plugin-typescript";

export const createSharedConfig = (pkg) => ({
  plugins: [
    typescript({
      compilerOptions: {
        module: "ESNext",
      },
    }),
  ],
  external: [
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {}),
  ],
  // The following option is useful because symlinks are used in monorepos
  preserveSymlinks: true,
});

export default (pkg) => [
  {
    input: "./src/index.ts",
    output: [
      {
        file: pkg.module,
        format: "esm",
        sourcemap: true,
      },
      {
        file: pkg.main,
        format: "cjs",
        sourcemap: true,
      },
    ],
    ...createSharedConfig(pkg),
  },
];