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* Unify the way we fork modules * Replace rollup-plugin-alias with our own plugin This does exactly what we need and doesn't suffer from https://github.com/rollup/rollup-plugin-alias/issues/34. * Move the new plugin to its own file * Rename variable for consistency I settled on calling them "forks" since we already have a different concept of "shims". * Move fork config into its own file
83 lines
2.5 KiB
JavaScript
83 lines
2.5 KiB
JavaScript
'use strict';
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const path = require('path');
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const forks = require('./forks');
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const bundleTypes = require('./bundles').bundleTypes;
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const UMD_DEV = bundleTypes.UMD_DEV;
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const UMD_PROD = bundleTypes.UMD_PROD;
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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 = Object.freeze({
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'fbjs/lib/invariant': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'fbjs/lib/warning': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'prop-types/checkPropTypes': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'fbjs/lib/camelizeStyleName': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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'fbjs/lib/hyphenateStyleName': HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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deepFreezeAndThrowOnMutationInDev: HAS_NO_SIDE_EFFECTS_ON_IMPORT,
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});
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// Bundles exporting globals that other modules rely on.
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const knownGlobals = Object.freeze({
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react: 'React',
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'react-dom': 'ReactDOM',
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});
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// Given ['react'] in bundle externals, returns { 'react': 'React' }.
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function getPeerGlobals(externals, moduleType) {
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const peerGlobals = {};
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externals.forEach(name => {
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if (
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!knownGlobals[name] &&
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(moduleType === UMD_DEV || moduleType === UMD_PROD)
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) {
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throw new Error('Cannot build UMD without a global name for: ' + name);
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}
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peerGlobals[name] = knownGlobals[name];
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});
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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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const packageJson = require(path.basename(
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path.dirname(require.resolve(entry))
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) + '/package.json');
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// Both deps and peerDeps are assumed as accessible.
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return Array.from(
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new Set([
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...Object.keys(packageJson.dependencies || {}),
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...Object.keys(packageJson.peerDependencies || {}),
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])
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);
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}
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// Hijacks some modules for optimization and integration reasons.
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function getForks(bundleType, entry) {
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const forksForBundle = {};
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Object.keys(forks).forEach(srcModule => {
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const dependencies = getDependencies(bundleType, entry);
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const targetModule = forks[srcModule](bundleType, entry, dependencies);
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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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});
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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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