SSG'd root level index page needs special dataRoute logic

Author: lindsaylevine

lib/pages/getStaticProps/setup.js

@@ -40,13 +40,22 @@ const setup = ({ functionsPath, publishPath }) => {
         const htmlPath = getFilePathForRoute(route_, "html", locale);
         setupStaticFileForPage({ inputPath: htmlPath, publishPath });
 
-        const jsonPath = getFilePathForRoute(route_, "json", locale);
         // The provided dataRoutes (from prerender-manifest) for these page types
         // actually don't include the locale (unclear why Vercel did this)
         // BUT the actual path to the .json files DO include the locale
         // therefore we need to set up the .json pages in the locale loop and
         // ignore the dataRoute provided by the prerender-manifest
-        const i18nDataRoute = getDataRouteForRoute(route, locale);
+        // Also root-level pages are generated into dist at path -> /en/index.json
+        // but fetched on the client as /_next/data/{BUILD_ID}/en.json haha love that for me
+        const jsonPath =
+          route === "/"
+            ? getFilePathForRoute(`/${locale}`, "json")
+            : getFilePathForRoute(route_, "json", locale);
+        const i18nDataRoute =
+          route === "/"
+            ? getDataRouteForRoute(`/${locale}`)
+            : getDataRouteForRoute(route, locale);
+        const hack2 = getDataRouteForRoute(`/${locale}`);
         setupStaticFileForPage({
           inputPath: jsonPath,
           outputPath: i18nDataRoute,