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| 1 | +/** |
| 2 | + * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | + * |
| 4 | + * This source code is licensed under the MIT license found in the |
| 5 | + * LICENSE file in the root directory of this source tree. |
| 6 | + * |
| 7 | + * @flow |
| 8 | + * @noformat |
| 9 | + */ |
| 10 | + |
| 11 | +/*:: import type {ConfigT} from 'metro-config'; */ |
| 12 | + |
| 13 | +const {getDefaultConfig: getBaseConfig, mergeConfig} = require('metro-config'); |
| 14 | + |
| 15 | +const INTERNAL_CALLSITES_REGEX = new RegExp( |
| 16 | + [ |
| 17 | + '/Libraries/Renderer/implementations/.+\\.js$', |
| 18 | + '/Libraries/BatchedBridge/MessageQueue\\.js$', |
| 19 | + '/Libraries/YellowBox/.+\\.js$', |
| 20 | + '/Libraries/LogBox/.+\\.js$', |
| 21 | + '/Libraries/Core/Timers/.+\\.js$', |
| 22 | + '/Libraries/WebSocket/.+\\.js$', |
| 23 | + '/Libraries/vendor/.+\\.js$', |
| 24 | + '/node_modules/react-devtools-core/.+\\.js$', |
| 25 | + '/node_modules/react-refresh/.+\\.js$', |
| 26 | + '/node_modules/scheduler/.+\\.js$', |
| 27 | + '/node_modules/event-target-shim/.+\\.js$', |
| 28 | + '/node_modules/invariant/.+\\.js$', |
| 29 | + '/node_modules/react-native/index.js$', |
| 30 | + '/metro-runtime/.+\\.js$', |
| 31 | + '^\\[native code\\]$', |
| 32 | + ].join('|'), |
| 33 | +); |
| 34 | + |
| 35 | +/** |
| 36 | + * Get the base Metro configuration for a React Native project. |
| 37 | + */ |
| 38 | +function getDefaultConfig( |
| 39 | + projectRoot /*: string */ |
| 40 | +) /*: ConfigT */ { |
| 41 | + const config = { |
| 42 | + resolver: { |
| 43 | + resolverMainFields: ['react-native', 'browser', 'main'], |
| 44 | + platforms: ['android', 'ios'], |
| 45 | + unstable_conditionNames: ['import', 'require', 'react-native'], |
| 46 | + }, |
| 47 | + serializer: { |
| 48 | + getPolyfills: () => require('@react-native/js-polyfills')(), |
| 49 | + }, |
| 50 | + server: { |
| 51 | + port: Number(process.env.RCT_METRO_PORT) || 8081, |
| 52 | + }, |
| 53 | + symbolicator: { |
| 54 | + customizeFrame: (frame /*: $ReadOnly<{file: ?string, ...}>*/) => { |
| 55 | + const collapse = Boolean( |
| 56 | + frame.file && INTERNAL_CALLSITES_REGEX.test(frame.file), |
| 57 | + ); |
| 58 | + return {collapse}; |
| 59 | + }, |
| 60 | + }, |
| 61 | + transformer: { |
| 62 | + allowOptionalDependencies: true, |
| 63 | + assetRegistryPath: 'react-native/Libraries/Image/AssetRegistry', |
| 64 | + asyncRequireModulePath: require.resolve( |
| 65 | + 'metro-runtime/src/modules/asyncRequire', |
| 66 | + ), |
| 67 | + babelTransformerPath: require.resolve( |
| 68 | + 'metro-react-native-babel-transformer', |
| 69 | + ), |
| 70 | + getTransformOptions: async () => ({ |
| 71 | + transform: { |
| 72 | + experimentalImportSupport: false, |
| 73 | + inlineRequires: true, |
| 74 | + }, |
| 75 | + }), |
| 76 | + }, |
| 77 | + watchFolders: [], |
| 78 | + }; |
| 79 | + |
| 80 | + return mergeConfig( |
| 81 | + getBaseConfig.getDefaultValues(projectRoot), |
| 82 | + config, |
| 83 | + ); |
| 84 | +} |
| 85 | + |
| 86 | +module.exports = {getDefaultConfig}; |
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