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

/**
 * @license
 * Copyright 2019 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 json from '@rollup/plugin-json';
import typescriptPlugin from 'rollup-plugin-typescript2';
import replace from 'rollup-plugin-replace';
import typescript from 'typescript';
import dts from 'rollup-plugin-dts';
import { generateBuildTargetReplaceConfig } from '../../scripts/build/rollup_replace_build_target.js';
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']
    }
  }),
  json({ preferConst: true })
];

/**
 * ESM builds
 */
const esmBuilds = [
  {
    input: 'src/index.ts',
    output: {
      file: pkg.browser,
      format: 'es',
      sourcemap: true
    },
    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`)),
    plugins: [
      ...buildPlugins,
      replace(generateBuildTargetReplaceConfig('esm', 2020)),
      emitModulePackageFile()
    ]
  }
];

/**
 * CJS builds
 */
const cjsBuilds = [
  {
    input: 'src/index.ts',
    output: {
      file: pkg.main,
      format: 'cjs',
      esModule: true,
      sourcemap: true
    },
    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`)),
    plugins: [
      ...buildPlugins,
      replace(generateBuildTargetReplaceConfig('cjs', 2020))
    ]
  }
];

const google3TypingsBuild = {
  input: 'dist/src/index.d.ts',
  output: {
    file: 'dist/src/global_index.d.ts',
    format: 'es'
  },
  plugins: [
    dts({
      respectExternal: true
    })
  ]
};

export default [...esmBuilds, ...cjsBuilds, google3TypingsBuild];