@expo/metro-config
Version:
A Metro config for running React Native projects with the Metro bundler
102 lines • 5.43 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getRewriteRequestUrl = exports.getRouterDirectory = void 0;
// Copyright 2023-present 650 Industries (Expo). All rights reserved.
const config_1 = require("@expo/config");
const paths_1 = require("@expo/config/paths");
const chalk_1 = __importDefault(require("chalk"));
const fs_1 = __importDefault(require("fs"));
const path_1 = __importDefault(require("path"));
const debug = require('debug')('expo:metro:config:rewriteRequestUrl');
function directoryExistsSync(file) {
try {
return fs_1.default.statSync(file)?.isDirectory() ?? false;
}
catch {
return false;
}
}
function isEnableHermesManaged(expoConfig, platform) {
switch (platform) {
case 'android': {
return (expoConfig.android?.jsEngine ?? expoConfig.jsEngine) !== 'jsc';
}
case 'ios': {
return (expoConfig.ios?.jsEngine ?? expoConfig.jsEngine) !== 'jsc';
}
default:
return false;
}
}
function getRouterDirectoryModuleIdWithManifest(projectRoot, exp) {
return exp.extra?.router?.root ?? getRouterDirectory(projectRoot);
}
function getRouterDirectory(projectRoot) {
// more specific directories first
if (directoryExistsSync(path_1.default.join(projectRoot, 'src', 'app'))) {
debug('Using src/app as the root directory for Expo Router.');
return path_1.default.join('src', 'app');
}
debug('Using app as the root directory for Expo Router.');
return 'app';
}
exports.getRouterDirectory = getRouterDirectory;
function getRewriteRequestUrl(projectRoot) {
function rewriteExpoRequestUrl(url) {
// Like: `/.expo/.virtual-metro-entry.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.bacon.test-custom-entry`
// Sometimes a fully qualified URL is passed in, e.g. `http://localhost:19001/.expo/.virtual-metro-entry.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.bacon.test-custom-entry`
if (url.includes('/.expo/.virtual-metro-entry.bundle?')) {
const { pkg, exp } = (0, config_1.getConfig)(projectRoot, { skipSDKVersionRequirement: true });
const ensured = url.startsWith('/') ? new URL(url, 'https://acme.dev') : new URL(url);
// TODO: Maybe this function could be memoized in some capacity?
const { searchParams } = ensured;
const platform = searchParams.get('platform') ?? 'web';
debug('Rewriting magic request url to entry point', { url, platform });
const entry = (0, paths_1.resolveEntryPoint)(projectRoot, {
platform,
pkg,
});
if (!entry) {
throw new Error((0, chalk_1.default) `The project entry file could not be resolved (platform: ${platform}, root: ${projectRoot}). Define it in the {bold package.json} "main" field.`);
}
// Infer the missing transform properties to attempt to match the manifest request.
// NOTE: Keep in sync with metroOptions.ts
if (!ensured.searchParams.has('transform.routerRoot')) {
ensured.searchParams.set('transform.routerRoot', getRouterDirectoryModuleIdWithManifest(projectRoot, exp));
}
if (!ensured.searchParams.has('transform.reactCompiler') && exp.experiments?.reactCompiler) {
ensured.searchParams.set('transform.reactCompiler', String(!!exp.experiments?.reactCompiler));
}
if (!ensured.searchParams.has('transform.engine')) {
const isHermesEnabled = isEnableHermesManaged(exp, platform);
if (isHermesEnabled) {
debug('Enabling Hermes for managed project');
ensured.searchParams.set('transform.engine', 'hermes');
ensured.searchParams.set('transform.bytecode', '1');
ensured.searchParams.set('unstable_transformProfile', 'hermes-stable');
}
}
const serverRoot = (0, paths_1.getMetroServerRoot)(projectRoot);
const relativeEntry = path_1.default.relative(serverRoot, entry).replace(/\.[tj]sx?$/, '');
debug('Resolved entry point', { entry, relativeEntry, serverRoot });
// Only return the pathname when url is relative
if (url.startsWith('/')) {
// Like: `/index.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.bacon.test-custom-entry`
return '/' + relativeEntry + '.bundle?' + searchParams.toString();
}
// Modify the pathname within the URL and return the full URL
ensured.pathname = '/' + relativeEntry + '.bundle';
const outputUrl = ensured.toString();
debug('Redirected:', outputUrl);
// Like: `http://localhost:19001/index.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.bacon.test-custom-entry`
return outputUrl;
}
return url;
}
return rewriteExpoRequestUrl;
}
exports.getRewriteRequestUrl = getRewriteRequestUrl;
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