WIP

scripts/rollup/babel.js

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+'use strict';
+
+const devExpressionWithCodes = require('../error-codes/dev-expression-with-codes');
+
+const babelOptsReact = {
+  plugins: [
+    devExpressionWithCodes, // this pass has to run before `rewrite-modules`
+  ],
+};
+
+module.exports = {
+  babelOptsReact,
+};

scripts/rollup/build.js

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+"use strict";
+
+const { rollup } = require('rollup');
+const bundles = require('./bundles');
+const babel = require('rollup-plugin-babel');
+const commonjs = require('rollup-plugin-commonjs');
+const alias = require('rollup-plugin-alias');
+const { createModuleMap } = require('./moduleMap');
+// const nodeResolve = require('rollup-plugin-node-resolve');
+
+const external = [];
+
+function getAliases(paths) {
+  return Object.assign(
+    createModuleMap(paths),
+    {
+      // ...
+    }
+  );
+}
+
+function getPlugins(entry, babelOpts, paths) {
+  return [
+    babel(babelOpts),
+    alias(getAliases(paths)),
+    // nodeResolve({ jsnext: true, main: true }),
+    commonjs(),
+  ];
+}
+
+bundles.forEach(({babelOpts, entry, config, paths}) => (
+  rollup({
+    entry,
+    plugins: getPlugins(entry, babelOpts, paths),
+    external,
+  }).then(({ write }) => write(config)).catch(console.error)
+));
+

scripts/rollup/bundles.js

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+'use strict';
+
+const {
+  babelOptsReact,
+} = require('./babel');
+
+const bundles = [
+  {
+    config: {
+      dest: 'build/rollup/react.js',
+      format: 'umd',
+      moduleName: 'React',
+      sourceMap: false,
+    },
+    entry: 'src/umd/ReactUMDEntry.js',
+    babelOpts: babelOptsReact,
+    paths: [
+      'src/umd/ReactUMDEntry.js',
+      'src/umd/ReactWithAddonsUMDEntry.js',
+      'src/umd/shims/**/*.js',
+
+      'src/isomorphic/**/*.js',
+      'src/addons/**/*.js',
+
+      'src/ReactVersion.js',
+      'src/shared/**/*.js',
+    ],
+  },
+];
+
+module.exports = bundles;

scripts/rollup/moduleMap.js

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+"use strict";
+
+const { resolve, basename } = require('path');
+const { sync } = require('glob');
+
+const exclude = [
+  'src/**/__benchmarks__/**/*.js',
+  'src/**/__tests__/**/*.js',
+  'src/**/__mocks__/**/*.js',
+]
+
+function createModuleMap(paths) {
+  const moduleMap = {};
+
+  paths.forEach(path => {
+    const files = sync(path, exclude);
+    
+    files.forEach(file => {
+      const moduleName = basename(file, '.js');
+
+      if (moduleName === 'ReactElementSymbol') {
+        console.log(file)
+      }
+
+      moduleMap[moduleName] = resolve(file);
+    });
+  });
+  return moduleMap;
+}
+
+module.exports = {
+  createModuleMap,
+};