fix(auth): Remove sharp edges from headless auth (#3985)

packages/cli/src/ui/utils/ConsolePatcher.ts

@@ -0,0 +1,61 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import util from 'util';
+import { ConsoleMessageItem } from '../types.js';
+
+interface ConsolePatcherParams {
+  onNewMessage: (message: Omit<ConsoleMessageItem, 'id'>) => void;
+  debugMode: boolean;
+}
+
+export class ConsolePatcher {
+  private originalConsoleLog = console.log;
+  private originalConsoleWarn = console.warn;
+  private originalConsoleError = console.error;
+  private originalConsoleDebug = console.debug;
+
+  private params: ConsolePatcherParams;
+
+  constructor(params: ConsolePatcherParams) {
+    this.params = params;
+  }
+
+  patch() {
+    console.log = this.patchConsoleMethod('log', this.originalConsoleLog);
+    console.warn = this.patchConsoleMethod('warn', this.originalConsoleWarn);
+    console.error = this.patchConsoleMethod('error', this.originalConsoleError);
+    console.debug = this.patchConsoleMethod('debug', this.originalConsoleDebug);
+  }
+
+  cleanup = () => {
+    console.log = this.originalConsoleLog;
+    console.warn = this.originalConsoleWarn;
+    console.error = this.originalConsoleError;
+    console.debug = this.originalConsoleDebug;
+  };
+
+  private formatArgs = (args: unknown[]): string => util.format(...args);
+
+  private patchConsoleMethod =
+    (
+      type: 'log' | 'warn' | 'error' | 'debug',
+      originalMethod: (...args: unknown[]) => void,
+    ) =>
+    (...args: unknown[]) => {
+      if (this.params.debugMode) {
+        originalMethod.apply(console, args);
+      }
+
+      if (type !== 'debug' || this.params.debugMode) {
+        this.params.onNewMessage({
+          type,
+          content: this.formatArgs(args),
+          count: 1,
+        });
+      }
+    };
+}