add check if pages-manifest exists before reading (#147)

Author: lindsaylevine

lib/helpers/getPagesManifest.js

@@ -1,11 +1,11 @@
 const { join } = require("path");
-const { readJSONSync } = require("fs-extra");
+const { existsSync, readJSONSync } = require("fs-extra");
 const { NEXT_DIST_DIR } = require("../config");
 
 const getPagesManifest = () => {
-  const contents = readJSONSync(
-    join(NEXT_DIST_DIR, "serverless", "pages-manifest.json")
-  );
+  const manifestPath = join(NEXT_DIST_DIR, "serverless", "pages-manifest.json");
+  if (!existsSync(manifestPath)) return {};
+  const contents = readJSONSync(manifestPath);
   // Next.js mistakenly puts backslashes in certain paths on Windows, replace
   Object.entries(contents).forEach(([key, value]) => {
     contents[key] = value.replace(/\\/g, "/");