add rollup config for lambda bundle

Author: lobsterkatie

packages/serverless/rollup.aws.config.js

@@ -0,0 +1,44 @@
+import { makeBaseBundleConfig, makeBundleConfigVariants, makeBaseNPMConfig } from '../../rollup/index.js';
+
+export default [
+  // The SDK
+  ...makeBundleConfigVariants(
+    makeBaseBundleConfig({
+      // this automatically sets it to be CJS
+      bundleType: 'node',
+      entrypoints: ['src/index.awslambda.ts'],
+      jsVersion: 'es6',
+      licenseTitle: '@sentry/serverless',
+      outputFileBase: () => 'index',
+      packageSpecificConfig: {
+        output: {
+          dir: 'build/aws/dist-serverless/nodejs/node_modules/@sentry/serverless/build/npm/cjs',
+          sourcemap: false,
+        },
+      },
+    }),
+    // We only need one copy of the SDK, and we pick the minified one because there's a cap on how big a lambda function
+    // plus its dependencies can be, and we might as well take up as little of that space as is necessary. We'll rename
+    // it to be `index.js` in the build script, since it's standing in for the index file of the npm package.
+    { variants: ['.min.js'] },
+  ),
+
+  // This builds a wrapper file, which our lambda layer integration automatically sets up to run as soon as node
+  // launches (via the `NODE_OPTIONS="-r @sentry/serverless/dist/awslambda-auto"` variable). Note the inclusion in this
+  // path of the legacy `dist` folder; for backwards compatibility, in the build script we'll copy the file there.
+  makeBaseNPMConfig({
+    entrypoints: ['src/awslambda-auto.ts'],
+    packageSpecificConfig: {
+      // Normally `makeNPMConfigVariants` sets both of these values for us, but we don't actually want the ESM variant,
+      // and the directory structure is different than normal, so we have to do it ourselves.
+      output: {
+        format: 'cjs',
+        dir: 'build/aws/dist-serverless/nodejs/node_modules/@sentry/serverless/build/npm/cjs',
+        sourcemap: false,
+      },
+      // We only want `awslambda-auto.js`, not the modules that it imports, because they're all included in the bundle
+      // we generate above
+      external: ['./index'],
+    },
+  }),
+];