75 lines
2.8 KiB
JavaScript
75 lines
2.8 KiB
JavaScript
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'use strict';
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const forks = './forks' |> require(%);
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// For any external that is used in a DEV-only condition, explicitly
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// specify whether it has side effects during import or not. This lets
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// us know whether we can safely omit them when they are unused.
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const HAS_NO_SIDE_EFFECTS_ON_IMPORT = false;
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// const HAS_SIDE_EFFECTS_ON_IMPORT = true;
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const importSideEffects = {
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fs: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'fs/promises': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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path: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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stream: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'prop-types/checkPropTypes': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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scheduler: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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react: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'react-dom/server': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'react/jsx-dev-runtime': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'react-dom': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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url: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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ReactNativeInternalFeatureFlags: HAS_NO_SIDE_EFFECTS_ON_IMPORT
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} |> Object.freeze(%);
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// Bundles exporting globals that other modules rely on.
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const knownGlobals = {
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react: 'React',
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'react-dom': 'ReactDOM',
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'react-dom/server': 'ReactDOMServer',
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scheduler: 'Scheduler',
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'scheduler/unstable_mock': 'SchedulerMock',
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ReactNativeInternalFeatureFlags: 'ReactNativeInternalFeatureFlags'
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} |> Object.freeze(%);
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// Given ['react'] in bundle externals, returns { 'react': 'React' }.
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function getPeerGlobals(externals, bundleType) {
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const peerGlobals = {};
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(name => {
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peerGlobals[name] = knownGlobals[name];
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}) |> externals.forEach(%);
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return peerGlobals;
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}
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// Determines node_modules packages that are safe to assume will exist.
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function getDependencies(bundleType, entry) {
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// Replaces any part of the entry that follow the package name (like
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// "/server" in "react-dom/server") by the path to the package settings
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const packageJson = /(\/.*)?$/ |> entry.replace(%, '/package.json') |> require(%);
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// Both deps and peerDeps are assumed as accessible.
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return new Set([...(packageJson.dependencies || {} |> Object.keys(%)), ...(packageJson.peerDependencies || {} |> Object.keys(%))]) |> Array.from(%);
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}
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// Hijacks some modules for optimization and integration reasons.
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function getForks(bundleType, entry, moduleType, bundle) {
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const forksForBundle = {};
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(srcModule => {
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const dependencies = bundleType |> getDependencies(%, entry);
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const targetModule = forks[srcModule](bundleType, entry, dependencies, moduleType, bundle);
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if (targetModule === null) {
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return;
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}
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forksForBundle[srcModule] = targetModule;
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}) |> (forks |> Object.keys(%)).forEach(%);
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return forksForBundle;
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}
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function getImportSideEffects() {
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return importSideEffects;
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}
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module.exports = {
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getImportSideEffects,
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getPeerGlobals,
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getDependencies,
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getForks
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};
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