Function normalizeDataRoute

packages/next/src/utils.ts:2936–2956

(route: string)

    let lambda: undefined | Lambda;

    function normalizeDataRoute(route: string) {
      let normalized = path.posix.join(entryDirectory, route);

      if (nonDynamicSsg || isFallback || isOmitted) {
        // the prerender-manifest can be inconsistent with
        // locale being provided to dataRoute so normalize here
        const pathToReplace = route.endsWith(routeFileNoExt + '.json')
          ? origRouteFileNoExt
          : routeFileNoExt;

        normalized = normalized.replace(
          new RegExp(`${escapeStringRegexp(origRouteFileNoExt)}.json$`),
          // ensure we escape "$" correctly while replacing as "$" is a special
          // character, we need to do double escaping as first is for the initial
          // replace on the routeFile and then the second on the outputPath
          `${pathToReplace.replace(/\$/g, '$$$$')}.json`
        );
      }

      return normalized;
    }

    let outputPathData: null | string = null;
    if (dataRoute) {