firebase-js-sdk/packages/component/rollup.config.js

/**
 * @license
 * Copyright 2018 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import typescriptPlugin from 'rollup-plugin-typescript2';
import typescript from 'typescript';
import { emitModulePackageFile } from '../../scripts/build/rollup_emit_module_package_file.js';
import pkg from './package.json' with { type: 'json' };
import tsconfig from './tsconfig.json' with { type: 'json' };

const deps = Object.keys(
  Object.assign({}, pkg.peerDependencies, pkg.dependencies)
);

const buildPlugins = [
  typescriptPlugin({
    typescript,
    tsconfigOverride: {
      exclude: [...tsconfig.exclude, '**/*.test.ts']
    }
  })
];

const esmBuild = {
  input: 'index.ts',
  output: { file: pkg.module, format: 'es', sourcemap: true },
  plugins: [...buildPlugins, emitModulePackageFile()],
  external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
};

const cjsBuild = {
  input: 'index.ts',
  output: {
    file: pkg.main,
    format: 'cjs',
    esModule: true,
    sourcemap: true
  },
  plugins: buildPlugins,
  external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
};

export default [esmBuild, cjsBuild];