Fix Issue #6382 Firebase not working for NextJs >=v13.5.0

CHANGELOG.md

@@ -1,3 +1,4 @@
 - Improve performance and reliability when deploying multiple 2nd gen functions using single builds. (#6376)
 - Fixed an issue where `emulators:export` did not check if the target folder is empty. (#6313)
-- Fix "Could not find the next executable" on Next.js deployments (#6372)
+- Fixed "Could not find the next executable" on Next.js deployments (#6372)
+- Fixed issues caused by breaking changes in Next >=v13.5.0. (#6382)

src/frameworks/next/index.ts

@@ -81,13 +81,13 @@
 const DEFAULT_NUMBER_OF_REASONS_TO_LIST = 5;
 
 function getReactVersion(cwd: string): string | undefined {
   return findDependency("react-dom", { cwd, omitDev: false })?.version;
 }
 
 /**
  * Returns whether this codebase is a Next.js backend.
  */
 export async function discover(dir: string) {
   if (!(await pathExists(join(dir, "package.json")))) return;
   if (!(await pathExists("next.config.js")) && !getNextVersion(dir)) return;
 
@@ -110,10 +110,10 @@
 
   const nextBuild = new Promise((resolve, reject) => {
     const buildProcess = spawn(cli, ["build"], { cwd: dir });
     buildProcess.stdout?.on("data", (data) => logger.info(data.toString()));
     buildProcess.stderr?.on("data", (data) => logger.info(data.toString()));
     buildProcess.on("error", (err) => {
       reject(new FirebaseError(`Unable to build your Next.js app: ${err}`));
     });
     buildProcess.on("exit", (code) => {
       resolve(code);
@@ -594,7 +594,7 @@
     if (gte(version, "12.0.0")) {
       const { default: loadConfig } = relativeRequire(dir, "next/dist/server/config");
       const { PHASE_PRODUCTION_BUILD } = relativeRequire(dir, "next/constants");
-      config = await loadConfig(PHASE_PRODUCTION_BUILD, dir, null);
+      config = await loadConfig(PHASE_PRODUCTION_BUILD, dir);
     } else {
       try {
         config = await import(pathToFileURL(join(dir, "next.config.js")).toString());