init

packages/cli/src/bundler/bundler.ts

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+import { rollup } from 'rollup';
+import sucrase from '@rollup/plugin-sucrase';
+import { nodeResolve } from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import json from '@rollup/plugin-json';
+import auto from '@rollup/plugin-auto-install';
+import { resolve } from 'path';
+
+const fix = <T extends { default: any }>(f: T) => f as T['default'];
+
+type BundleOptions = {
+  entry: string;
+  autoInstall?: boolean;
+};
+
+const bundle = async ({ entry, autoInstall }: BundleOptions) => {
+  const entryFile = resolve(entry);
+  const codeBundler = await rollup({
+    plugins: [
+      fix(sucrase)({
+        transforms: ['typescript', 'jsx'],
+      }),
+      ...[autoInstall ? fix(auto) : []],
+      nodeResolve({ extensions: ['.js', '.jsx', '.ts', '.tsx'] }),
+      fix(json)(),
+      fix(commonjs)({ include: /node_modules/ }),
+    ],
+    input: entryFile,
+  });
+  const { output: codeOutput } = await codeBundler.generate({
+    format: 'cjs',
+  });
+  if (codeOutput.length > 1) {
+    throw new Error('Multiple outputs are not supported');
+  }
+  const [codeResult] = codeOutput;
+
+  const { code } = codeResult;
+  return code;
+};
+
+export { bundle };