Automatically detect non-interactive environments and fall back to a manual, code-based authentication flow (#4475)

packages/cli/src/gemini.tsx

@@ -37,6 +37,7 @@ import {
   logUserPrompt,
   AuthType,
   getOauthClient,
+  shouldAttemptBrowserLaunch,
 } from '@google/gemini-cli-core';
 import { validateAuthMethod } from './config/auth.js';
 import { setMaxSizedBoxDebugging } from './ui/components/shared/MaxSizedBox.js';
@@ -184,7 +185,7 @@ export async function main() {
 
   if (
     settings.merged.selectedAuthType === AuthType.LOGIN_WITH_GOOGLE &&
-    config.getNoBrowser()
+    (config.getNoBrowser() || !shouldAttemptBrowserLaunch())
   ) {
     // Do oauth before app renders to make copying the link possible.
     await getOauthClient(settings.merged.selectedAuthType, config);

packages/cli/src/ui/hooks/useAuthCommand.ts

@@ -11,6 +11,7 @@ import {
   Config,
   clearCachedCredentialFile,
   getErrorMessage,
+  shouldAttemptBrowserLaunch,
 } from '@google/gemini-cli-core';
 import { runExitCleanup } from '../../utils/cleanup.js';
 
@@ -56,7 +57,10 @@ export const useAuthCommand = (
       if (authType) {
         await clearCachedCredentialFile();
         settings.setValue(scope, 'selectedAuthType', authType);
-        if (authType === AuthType.LOGIN_WITH_GOOGLE && config.getNoBrowser()) {
+        if (
+          authType === AuthType.LOGIN_WITH_GOOGLE &&
+          (config.getNoBrowser() || !shouldAttemptBrowserLaunch())
+        ) {
           runExitCleanup();
           console.log(
             `