FIX: Modify logic to get active player settings object to work with build profiles (ISXB-1430) (#2136)

Author: marcus-winter42

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -11,6 +11,7 @@ however, it has to be formatted properly to pass verification tests.
 ## [Unreleased] - yyyy-mm-dd
 
 ### Fixed
+- Fixed a problem with the logic to get the active player settings object that cause an infinit reimport loop. [ISXB-1430](https://jira.unity3d.com/browse/ISXB-1430)
 - Fixed an issue where removing a newly created action in the Asset Editor would cause an exception. [UUM-95693](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-95693)
 - Fixed arrow key navigation of Input Actions after Action rename. [ISXB-1024](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1024)
 - Fixed gamepad navigation in UI Toolkit TextField when using InputSystemUIInputModule. [UUM-77364](https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-77364)

Packages/com.unity.inputsystem/InputSystem/Editor/Settings/EditorPlayerSettingHelpers.cs

@@ -3,6 +3,11 @@
 using System.Linq;
 using UnityEditor;
 
+#if UNITY_6000_0_OR_NEWER
+using System.Reflection;
+using UnityEditor.Build.Profile;
+#endif
+
 namespace UnityEngine.InputSystem.Editor
 {
     internal static class EditorPlayerSettingHelpers
@@ -154,7 +159,33 @@ private static int TupleToActiveInputHandler((bool newSystemEnabled, bool oldSys
 
         private static SerializedProperty GetPropertyOrNull(string name)
         {
+#if UNITY_6000_0_OR_NEWER
+            // HOTFIX: the code below works around an issue causing an infinite reimport loop
+            // this will be replaced by a call to an API in the editor instead of using reflection once it is available
+            var buildProfileType = typeof(BuildProfile);
+            var globalPlayerSettingsField = buildProfileType.GetField("s_GlobalPlayerSettings", BindingFlags.Static | BindingFlags.NonPublic);
+            if (globalPlayerSettingsField == null)
+            {
+                Debug.LogError($"Could not find global player settings field in build profile when trying to get property {name}. Please try to update the Input System package.");
+                return null;
+            }
+            var playerSettings = (PlayerSettings)globalPlayerSettingsField.GetValue(null);
+            var activeBuildProfile = BuildProfile.GetActiveBuildProfile();
+            if (activeBuildProfile != null)
+            {
+                var playerSettingsOverrideField = buildProfileType.GetField("m_PlayerSettings", BindingFlags.Instance | BindingFlags.NonPublic);
+                if (playerSettingsOverrideField == null)
+                {
+                    Debug.LogError($"Could not find player settings override field in build profile when trying to get property {name}. Please try to update the Input System package.");
+                    return null;
+                }
+                var playerSettingsOverride = (PlayerSettings)playerSettingsOverrideField.GetValue(activeBuildProfile);
+                if (playerSettingsOverride != null)
+                    playerSettings = playerSettingsOverride;
+            }
+#else
             var playerSettings = Resources.FindObjectsOfTypeAll<PlayerSettings>().FirstOrDefault();
+#endif
             if (playerSettings == null)
                 return null;
             var playerSettingsObject = new SerializedObject(playerSettings);