Permit running requests as frontend vs. backend

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

features/profile-stage.feature

@@ -171,3 +171,21 @@ Feature: Profile the template render stage
       | hook              |
       | init              |
       | wp_loaded:after   |
+
+  @require-wp-4.0
+  Scenario: Admin URL runs as a backend request and skips frontend stages
+    Given a WP install
+
+    When I run `wp profile stage --url=example.com/wp-admin/ --fields=stage`
+    Then STDOUT should be a table containing rows:
+      | stage     |
+      | bootstrap |
+    And STDOUT should not contain:
+      """
+      main_query
+      """
+    And STDOUT should not contain:
+      """
+      template
+      """
+    And STDERR should be empty

src/Profiler.php

@@ -48,6 +48,8 @@ class Profiler {
 	private $tick_cache_hit_offset  = null;
 	private $tick_cache_miss_offset = null;
 
+	private $is_admin_request = false;
+
 	public function __construct( $type, $focus ) {
 		$this->type  = $type;
 		$this->focus = $focus;
@@ -77,6 +79,9 @@ public function get_loggers() {
 	 * Run the profiler against WordPress
 	 */
 	public function run() {
+		$url                    = WP_CLI::get_runner()->config['url'];
+		$this->is_admin_request = ! empty( $url ) && (bool) preg_match( '#/wp-admin(/|$)#i', $url );
+
 		WP_CLI::add_wp_hook(
 			'muplugins_loaded',
 			function () {
@@ -97,6 +102,9 @@ function () {
 				if ( ! defined( 'SAVEQUERIES' ) ) {
 					define( 'SAVEQUERIES', true );
 				}
+				if ( $this->is_admin_request && ! defined( 'WP_ADMIN' ) ) {
+					define( 'WP_ADMIN', true );
+				}
 			}
 		);
 		if (
@@ -437,6 +445,11 @@ private function load_wordpress_with_template() {
 			$this->loggers[] = $logger;
 		}
 
+		// Skip main_query and template stages for admin requests.
+		if ( $this->is_admin_request ) {
+			return;
+		}
+
 		// Set up main_query main WordPress query.
 		if ( 'stage' === $this->type ) {
 			if ( 'main_query' === $this->focus ) {