| /** |
| * @license |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| const path = require('path'); |
| const { DEFAULT_EXTENSIONS } = require('@babel/core'); |
| |
| module.exports = (api) => { |
| const ENV = api.env(); |
| const DEV = ENV === 'development'; |
| const TEST = ENV === 'test'; |
| const CJS = ENV === 'cjs'; |
| |
| // Options for the @babel/env preset. |
| const envOptions = { |
| // Use minimal syntax fixes where possible |
| // Note: This setting may become the default in Babel 8. |
| bugfixes: true, |
| // Transform module syntax if necessary. |
| modules: CJS || TEST ? 'commonjs' : false, |
| }; |
| |
| // Options for the @babel/typescript preset. |
| const typescriptOptions = { |
| // Opt in to a Babel 8 default. |
| allowDeclareFields: true, |
| // Be explicit about type-only imports. |
| onlyRemoveTypeImports: true, |
| }; |
| |
| const addImportExtensionOptions = { |
| extension: DEV || TEST ? 'ts' : CJS ? 'js' : 'mjs', |
| }; |
| |
| // Options for the module-resolver plugin. |
| // Used for resolving source files during development. |
| const resolverOptions = { |
| alias: { |
| ...(DEV || TEST |
| ? { |
| '^@apache-annotator/([^/]+)$': ([, name]) => |
| path.join(__dirname, 'packages', name, '/src/index.ts'), |
| } |
| : null), |
| }, |
| extensions: ['.ts', '.tsx', ...DEFAULT_EXTENSIONS], |
| }; |
| |
| // Options for the @babel/transform-runtime plugin. |
| const runtimeOptions = { |
| // Use corejs version 3. |
| corejs: { version: 3, proposals: true }, |
| // Use helpers formatted for the target environment. |
| useESModules: !CJS && !TEST, |
| }; |
| |
| return { |
| plugins: [ |
| '@babel/plugin-proposal-class-properties', |
| ['@babel/transform-runtime', runtimeOptions], |
| ['add-import-extension', addImportExtensionOptions], |
| ['module-resolver', resolverOptions], |
| 'preserve-comment-header', |
| ...(TEST ? ['istanbul'] : []), |
| ], |
| presets: [ |
| ['@babel/env', envOptions], |
| ['@babel/typescript', typescriptOptions], |
| ], |
| targets: TEST ? { node: 'current' } : 'defaults', |
| }; |
| }; |