Writing debug data in the Entity Debugger

DebugData.cs

using Unity.Collections;
using Unity.Entities;
using UnityEngine;

public struct DebugName : IComponentData
{
    public NativeString64 Value;

#if UNITY_EDITOR
    // To make this work, it requires EntityComponentInspector: [URL]https://github.com/OndrejPetrzilka/EntityComponentInspector[/URL]
    void OnEditorGUI(string label)
    {
        Value = new NativeString64(UnityEditor.EditorGUILayout.TextField(label, Value.ToString()));
    }
#endif
}

/// <summary>
/// Adds <see cref="DebugName"/> to all entities.
/// </summary>
[UpdateInGroup(typeof(GameObjectAfterConversionGroup))]
public class DebugNameConversionSystem : GameObjectConversionSystem
{
    protected override void OnUpdate()
    {
        Entities.ForEach((Transform transform) =>
        {
            var entity = GetPrimaryEntity(transform);
            if (entity != Entity.Null)
            {
                DstEntityManager.AddComponentData(entity, new DebugName { Value = new NativeString64(transform.gameObject.name) });
            }
        });
    }
}

/// <summary>
/// Updates entity name based on <see cref="DebugName"/> component.
/// </summary>
[ExecuteAlways, UpdateInGroup(typeof(InitializationSystemGroup))]
public class DebugNameSystem : ComponentSystem
{
    public static string PrefabPrefix = "☒ ";
    private static readonly EntityQueryDesc queryDesc = new EntityQueryDesc { All = new[] { ComponentType.ReadOnly<DebugName>() }, Options = EntityQueryOptions.IncludeDisabled };
    private static readonly EntityQueryDesc queryDescPrefabs = new EntityQueryDesc { All = new[] { ComponentType.ReadOnly<DebugName>(), ComponentType.ReadOnly<Prefab>() }, Options = EntityQueryOptions.IncludeDisabled | EntityQueryOptions.IncludePrefab };

    EntityQuery m_query;
    EntityQuery m_queryPrefabs;

    protected override void OnCreate()
    {
        base.OnCreate();
        m_query = GetEntityQuery(queryDesc);
        m_query.SetChangedVersionFilter(typeof(DebugName));

        m_queryPrefabs = GetEntityQuery(queryDescPrefabs);
        m_queryPrefabs.SetChangedVersionFilter(typeof(DebugName));
    }

    protected override void OnUpdate()
    {
        Entities.With(m_query).ForEach((Entity entity, ref DebugName name) =>
        {
            EntityManager.SetName(entity, name.Value.ToString());
        });

        Entities.With(m_queryPrefabs).ForEach((Entity entity, ref DebugName name) =>
        {
            EntityManager.SetName(entity, PrefabPrefix + name.Value.ToString());
        });
    }
}