Function filterStaticPages

packages/next/src/utils.ts:894–937

(
  staticPageFiles: FileMap,
  dynamicPages: string[],
  entryDirectory: string,
  htmlContentType: string,
  prerenderManifest: NextPrerenderedRoutes,
  nextVersion: string,
  routesManifest?: RoutesManifest
)

type FileMap = { [page: string]: FileFsRef };

export function filterStaticPages(
  staticPageFiles: FileMap,
  dynamicPages: string[],
  entryDirectory: string,
  htmlContentType: string,
  prerenderManifest: NextPrerenderedRoutes,
  nextVersion: string,
  routesManifest?: RoutesManifest
) {
  const staticPages: FileMap = {};

  Object.keys(staticPageFiles).forEach((page: string) => {
    const pathname = page.replace(/\.html$/, '');
    const routeName = normalizeLocalePath(
      normalizePage(pathname),
      routesManifest?.i18n?.locales
    ).pathname;

    // Prerendered routes emit a `.html` file but should not be treated as a
    // static page.
    // Lazily prerendered routes have a fallback `.html` file on newer
    // Next.js versions so we need to also not treat it as a static page here.
    if (
      prerenderManifest.staticRoutes[routeName] ||
      prerenderManifest.fallbackRoutes[routeName] ||
      prerenderManifest.staticRoutes[normalizePage(pathname)] ||
      prerenderManifest.fallbackRoutes[normalizePage(pathname)]
    ) {
      return;
    }

    const staticRoute = path.posix.join(entryDirectory, pathname);

    staticPages[staticRoute] = staticPageFiles[page];
    staticPages[staticRoute].contentType = htmlContentType;

    if (isDynamicRoute(pathname, nextVersion)) {
      dynamicPages.push(routeName);
      return;
    }
  });

  return staticPages;
}

export function getFilesMapFromReasons(
  fileList: ReadonlySet<string>,