[Build] 빌드 시, Builtin 되는 AssetBundle 중 현재 Platform의 AssetBundle만 빌트인 되도록 하기

[빌드 시, Builtin AssetBundles에서 해당 Platform 에셋번들만 빌드 되도록 하기 위한 PreProcessor 추가]

기본적으로 에셋번들은 플랫폼 별로 모두 가지고 있는데 해당 플랫폼에 맞는 에셋번들만 빌드 되도록 하기 위해서

빌드 전(PreProcessor)에 잠시 다른 곳(Temp)으로 옮겼다가, 빌드 후(PostProcessor)에 되돌려 놓도록 함.

 

using System;
using UnityEditor;
using UnityEditor.Build;
#if UNITY_2018_1_OR_NEWER
using UnityEditor.Build.Reporting;
#endif
using UnityEditor.Callbacks;

namespace blueasa
{
    /// <summary>
    /// 빌드 시, Built-in AssetBundle에서 해당 Platform AssetBundle만 빌드 되도록 하기 위한 Preprocessor
    /// 빌드 전(Preprocessor) 해당 안되는 AssetBundle을 옮겨뒀다가, 빌드 후(Postprocessor) 되돌려 놓음
    /// </summary>
#if UNITY_2018_1_OR_NEWER
    public class BuildPreprocessor_BuiltinAssetBundle : IPreprocessBuildWithReport, IPostprocessBuildWithReport
#else
    public class BuildPreprocessor_BuiltinAssetBundle : IPreprocessBuild, IPostprocessBuild
#endif
    {
        private static readonly string m_strTemp = "Temp";
        private static readonly string m_strAssetBundlesPath_Builtin_Android = "Assets/StreamingAssets/AssetBundles/Android";
        private static readonly string m_strAssetBundlesPath_Builtin_iOS = "Assets/StreamingAssets/AssetBundles/iOS";
        private static readonly string m_strAssetBundlesPath_Temp_Android = "Assets/Temp/Android";
        private static readonly string m_strAssetBundlesPath_Temp_iOS = "Assets/Temp/iOS";

        public int callbackOrder { get { return 0; } }

#if UNITY_2018_1_OR_NEWER
        public void OnPreprocessBuild(BuildReport report)
#else
        public void OnPreprocessBuild(BuildTarget target, string path)
#endif
        {
            Debug.LogWarning($"[OnPreprocessBuild] {this}");

            // Temp 폴더 없으면 생성
            if (false == AssetDatabase.IsValidFolder("Assets/Temp"))
            {
                Debug.LogWarning("[OnPreprocessBuild] Create 'Temp' Folder");
                AssetDatabase.CreateFolder("Assets", m_strTemp);
                AssetDatabase.Refresh();
            }

            // 빌드 전, 다른 플랫폼 AssetBundle 폴더 임시 Move(제외)
#if UNITY_ANDROID
            if (true == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Builtin_iOS)
                && false == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Temp_iOS))
            {
                Debug.LogWarning("[OnPreprocessBuild] Move 'iOS' Folder to 'Temp'");
                AssetDatabase.MoveAsset(m_strAssetBundlesPath_Builtin_iOS, m_strAssetBundlesPath_Temp_iOS);
                AssetDatabase.Refresh();
            }
#elif UNITY_IOS
            if (true == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Builtin_Android)
                && false == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Temp_Android))
            {
                Debug.LogWarning("[OnPreprocessBuild] Move 'Android' Folder to 'Temp'");
                AssetDatabase.MoveAsset(m_strAssetBundlesPath_Builtin_Android, m_strAssetBundlesPath_Temp_Android);
                AssetDatabase.Refresh();
            }
#endif
        }

#if UNITY_2018_1_OR_NEWER
        public void OnPostprocessBuild(BuildReport report)
#else
    public void OnPostprocessBuild(BuildTarget target, string path)
#endif
        {
            Debug.LogWarning($"[OnPostprocessBuild] {this}");

            // 빌드 후, Move(제외) 됐던 다른 플랫폼 AssetBundle 폴더 원래 자리로 되돌리기
#if UNITY_ANDROID
            if (true == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Temp_iOS)
                && false == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Builtin_iOS))
            {
                Debug.LogWarning("[OnPreprocessBuild] Return 'iOS' Folder From 'Temp'");
                AssetDatabase.MoveAsset(m_strAssetBundlesPath_Temp_iOS, m_strAssetBundlesPath_Builtin_iOS);
                AssetDatabase.Refresh();
            }
#elif UNITY_IOS
            if (true == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Temp_Android)
                && false == AssetDatabase.IsValidFolder(m_strAssetBundlesPath_Builtin_Android))
            {
                Debug.LogWarning("[OnPreprocessBuild] Return 'Android' Folder From 'Temp'");
                AssetDatabase.MoveAsset(m_strAssetBundlesPath_Temp_Android, m_strAssetBundlesPath_Builtin_Android);
                AssetDatabase.Refresh();
            }
#endif
        }
    }
}