change process.env.IS_FIREBASE_MCP to isFirebaseMcp and setFirebaseMcp (#10081)

Co-authored-by: Joe Hanley <[email protected]>

Author: aalej

src/track.spec.ts

@@ -4,6 +4,7 @@ import * as nock from "nock";
 import { configstore } from "./configstore";
 import * as track from "./track";
 import * as auth from "./auth";
+import { setFirebaseMcp } from "./env";
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const pkg = require("../package.json");
@@ -25,7 +26,7 @@ describe("track", () => {
     sandbox.restore();
     nock.enableNetConnect();
     delete process.env.IS_FIREBASE_CLI;
-    delete process.env.IS_FIREBASE_MCP;
+    setFirebaseMcp(false);
     delete process.env.FIREBASE_CLI_MP_VALIDATE;
     track.GA4_PROPERTIES.cli.currentSession = undefined;
     track.GA4_PROPERTIES.emulator.currentSession = undefined;
@@ -39,8 +40,8 @@ describe("track", () => {
       expect(track.usageEnabled()).to.be.true;
     });
 
-    it("should return true if usage is enabled and IS_FIREBASE_MCP is true", () => {
-      process.env.IS_FIREBASE_MCP = "true";
+    it("should return true if usage is enabled and isFirebaseMcp() is true", () => {
+      setFirebaseMcp(true);
       configstoreGetStub.withArgs("usage").returns(true);
       expect(track.usageEnabled()).to.be.true;
     });

src/track.ts

@@ -4,7 +4,7 @@ import { getGlobalDefaultAccount } from "./auth";
 
 import { configstore } from "./configstore";
 import { logger } from "./logger";
-import { isFirebaseStudio, detectAIAgent } from "./env";
+import { isFirebaseStudio, detectAIAgent, isFirebaseMcp } from "./env";
 const pkg = require("../package.json");
 
 type cliEventNames =
@@ -66,9 +66,7 @@ export const GA4_PROPERTIES: Record<GA4Property, GA4Info> = {
  *   2) User opted-in.
  */
 export function usageEnabled(): boolean {
-  return (
-    (!!process.env.IS_FIREBASE_CLI || !!process.env.IS_FIREBASE_MCP) && !!configstore.get("usage")
-  );
+  return (!!process.env.IS_FIREBASE_CLI || isFirebaseMcp()) && !!configstore.get("usage");
 }
 
 // Prop name length must <= 24 and cannot begin with google_/ga_/firebase_.