fix(emulator): skip legacy monkeypatching for firebase-functions v7+

CHANGELOG.md

@@ -1,3 +1,4 @@
+- Fixed an issue where the emulator would fail to start when using `firebase-functions` v7+ (#9401).
 - Added `functions.list_functions` as a MCP tool (#9369)
 - Added AI Logic to `firebase init` CLI command and `firebase_init` MCP tool. (#9185)
 - Improved error messages for Firebase AI Logic provisioning during 'firebase init' (#9377)

src/emulator/functionsEmulatorRuntime.ts

@@ -23,7 +23,7 @@
   rawBody: Buffer;
 }
 
 let functionModule: any;
 let FUNCTION_TARGET_NAME: string;
 let FUNCTION_SIGNATURE: string;
 let FUNCTION_DEBUG_MODE: string;
@@ -48,7 +48,7 @@
   return new Promise((res, rej) => {
     try {
       res(require(require.resolve(moduleName, opts))); // eslint-disable-line @typescript-eslint/no-var-requires
     } catch (e: any) {
       rej(e);
     }
   });
@@ -58,7 +58,7 @@
   return new Promise((res, rej) => {
     try {
       res(require.resolve(moduleName, opts));
     } catch (e: any) {
       rej(e);
     }
   });
@@ -105,22 +105,22 @@
   /**
    * Gets a property from the original object.
    */
   static getOriginal(target: any, key: string): any {
     const value = target[key];
 
     if (!Proxied.isExists(value)) {
       return undefined;
     } else if (Proxied.isConstructor(value) || typeof value !== "function") {
       return value;
     } else {
       return value.bind(target);
     }
   }
 
   /**
    * Run the original target.
    */
   static applyOriginal(target: any, thisArg: any, argArray: any[]): any {
     return target.apply(thisArg, argArray);
   }
 
@@ -400,6 +400,11 @@
    */
 async function initializeFirebaseFunctionsStubs(): Promise<void> {
   const firebaseFunctionsResolution = await assertResolveDeveloperNodeModule("firebase-functions");
+  if (compareVersionStrings(firebaseFunctionsResolution.version, "7.0.0") >= 0) {
+    logDebug("Detected firebase-functions v7+, skipping legacy stubs.");
+    return;
+  }
+
   const firebaseFunctionsRoot = findModuleRoot(
     "firebase-functions",
     firebaseFunctionsResolution.resolution,
@@ -711,6 +716,11 @@
 
 async function initializeFunctionsConfigHelper(): Promise<void> {
   const functionsResolution = await assertResolveDeveloperNodeModule("firebase-functions");
+  if (compareVersionStrings(functionsResolution.version, "7.0.0") >= 0) {
+    logDebug("Detected firebase-functions v7+, skipping config helper.");
+    return;
+  }
+
   const localFunctionsModule = require(functionsResolution.resolution);
 
   logDebug("Checked functions.config()", {