mirror of
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117 lines
3.4 KiB
JavaScript
117 lines
3.4 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict-local
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* @format
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* @oncall react_native
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*/
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import type {Config} from '@react-native-community/cli-types';
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import type {ConfigT, InputConfigT, YargArguments} from 'metro-config';
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import path from 'path';
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import {loadConfig, mergeConfig, resolveConfig} from 'metro-config';
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import {CLIError, logger} from '@react-native-community/cli-tools';
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import {reactNativePlatformResolver} from './metroPlatformResolver';
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export type {Config};
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export type ConfigLoadingContext = $ReadOnly<{
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root: Config['root'],
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reactNativePath: Config['reactNativePath'],
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platforms: Config['platforms'],
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...
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}>;
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/**
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* Get the config options to override based on RN CLI inputs.
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*/
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function getOverrideConfig(ctx: ConfigLoadingContext): InputConfigT {
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const outOfTreePlatforms = Object.keys(ctx.platforms).filter(
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platform => ctx.platforms[platform].npmPackageName,
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);
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const resolver: Partial<{...ConfigT['resolver']}> = {
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platforms: [...Object.keys(ctx.platforms), 'native'],
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};
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if (outOfTreePlatforms.length) {
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resolver.resolveRequest = reactNativePlatformResolver(
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outOfTreePlatforms.reduce<{[platform: string]: string}>(
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(result, platform) => {
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result[platform] = ctx.platforms[platform].npmPackageName;
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return result;
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},
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{},
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),
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);
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}
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return {
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resolver,
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serializer: {
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// We can include multiple copies of InitializeCore here because metro will
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// only add ones that are already part of the bundle
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getModulesRunBeforeMainModule: () => [
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require.resolve(
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path.join(ctx.reactNativePath, 'Libraries/Core/InitializeCore'),
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{paths: [ctx.root]},
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),
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...outOfTreePlatforms.map(platform =>
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require.resolve(
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`${ctx.platforms[platform].npmPackageName}/Libraries/Core/InitializeCore`,
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{paths: [ctx.root]},
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),
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),
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],
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},
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};
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}
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/**
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* Load Metro config.
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*
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* Allows the CLI to override select values in `metro.config.js` based on
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* dynamic user options in `ctx`.
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*/
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export default async function loadMetroConfig(
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ctx: ConfigLoadingContext,
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options: YargArguments = {},
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): Promise<ConfigT> {
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const overrideConfig = getOverrideConfig(ctx);
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const cwd = ctx.root;
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const projectConfig = await resolveConfig(options.config, cwd);
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if (projectConfig.isEmpty) {
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throw new CLIError(`No Metro config found in ${cwd}`);
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}
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logger.debug(`Reading Metro config from ${projectConfig.filepath}`);
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if (!global.__REACT_NATIVE_METRO_CONFIG_LOADED) {
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const warning = `
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=================================================================================================
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From React Native 0.73, your project's Metro config should extend '@react-native/metro-config'
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or it will fail to build. Please copy the template at:
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https://github.com/facebook/react-native/blob/main/packages/react-native/template/metro.config.js
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This warning will be removed in future (https://github.com/facebook/metro/issues/1018).
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=================================================================================================
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`;
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for (const line of warning.trim().split('\n')) {
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logger.warn(line);
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}
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}
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return mergeConfig(
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await loadConfig({
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cwd,
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...options,
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}),
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overrideConfig,
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);
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}
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