add template for wrapping data-fetching functions

Author: lobsterkatie

packages/nextjs/rollup.npm.config.js

@@ -14,11 +14,15 @@ export default [
   ),
   ...makeNPMConfigVariants(
     makeBaseNPMConfig({
-      entrypoints: ['src/config/templates/prefixLoaderTemplate.ts'],
+      entrypoints: [
+        'src/config/templates/prefixLoaderTemplate.ts',
+        'src/config/templates/dataFetchersLoaderTemplate.ts',
+      ],
 
       packageSpecificConfig: {
         output: {
-          // preserve the original file structure (i.e., so that everything is still relative to `src`)
+          // Preserve the original file structure (i.e., so that everything is still relative to `src`). (Not entirely
+          // clear why this is necessary here and not for other entrypoints in this file.)
           entryFileNames: 'config/templates/[name].js',
 
           // this is going to be add-on code, so it doesn't need the trappings of a full module (and in fact actively

packages/nextjs/src/config/templates/dataFetchersLoaderTemplate.ts

@@ -0,0 +1,28 @@
+import type {
+  GetServerSideProps as GetServerSidePropsFunction,
+  GetStaticPaths as GetStaticPathsFunction,
+  GetStaticProps as GetStaticPropsFunction,
+} from 'next';
+
+import type { withSentryGSPaths, withSentryGSProps, withSentryGSSP } from '../wrappers';
+
+// TODO: Somehow the types for the imported SDK aren't recognized when it's imported using `require`, so for the moment,
+// we're faking it
+type SentrySDK = {
+  withSentryGSSP: typeof withSentryGSSP;
+  withSentryGSProps: typeof withSentryGSProps;
+  withSentryGSPaths: typeof withSentryGSPaths;
+};
+
+declare const _getServerSideProps: GetServerSidePropsFunction;
+declare const _getStaticProps: GetStaticPropsFunction;
+declare const _getStaticPaths: GetStaticPathsFunction;
+
+// TODO: This is a require rather than an imoprt because for some reason, using `import` makes rollup silently refuse to
+// output a built version of this file.
+// eslint-disable-next-line @typescript-eslint/no-var-requires, import/no-extraneous-dependencies
+const ServerSideSentryNextjsSDK = require('@sentry/nextjs');
+
+export const getServerSideProps = (ServerSideSentryNextjsSDK as SentrySDK).withSentryGSSP(_getServerSideProps);
+export const getStaticProps = (ServerSideSentryNextjsSDK as SentrySDK).withSentryGSProps(_getStaticProps);
+export const getStaticPaths = (ServerSideSentryNextjsSDK as SentrySDK).withSentryGSPaths(_getStaticPaths);