fix #519

FileSystemParametersDefine新增参数：INSTALL_CLEAR_MODE

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/DefaultCacheFileSystem.cs

@@ -65,6 +65,11 @@ namespace YooAsset
         /// </summary>
         public EFileVerifyLevel FileVerifyLevel { private set; get; } = EFileVerifyLevel.Middle;
 
+        /// <summary>
+        /// 自定义参数：覆盖安装缓存清理模式
+        /// </summary>
+        public EOverwriteInstallClearMode InstallClearMode { private set; get; } = EOverwriteInstallClearMode.ClearAllManifestFiles;
+
         /// <summary>
         /// 自定义参数：数据文件追加文件格式
         /// </summary>
@@ -188,6 +193,10 @@ namespace YooAsset
             {
                 FileVerifyLevel = (EFileVerifyLevel)value;
             }
+            else if (name == FileSystemParametersDefine.INSTALL_CLEAR_MODE)
+            {
+                InstallClearMode = (EOverwriteInstallClearMode)value;
+            }
             else if (name == FileSystemParametersDefine.APPEND_FILE_EXTENSION)
             {
                 AppendFileExtension = Convert.ToBoolean(value);
@@ -227,8 +236,8 @@ namespace YooAsset
                 _packageRoot = packageRoot;
 
             _cacheBundleFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.BundleFilesFolderName);
-            _tempFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.TempFilesFolderName);
             _cacheManifestFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.ManifestFilesFolderName);
+            _tempFilesRoot = PathUtility.Combine(_packageRoot, DefaultCacheFileSystemDefine.TempFilesFolderName);
         }
         public virtual void OnDestroy()
         {
@@ -500,7 +509,18 @@ namespace YooAsset
         }
 
         /// <summary>
-        /// 删除所有清单文件
+        /// 删除所有缓存的资源文件
+        /// </summary>
+        public void DeleteAllBundleFiles()
+        {
+            if (Directory.Exists(_cacheBundleFilesRoot))
+            {
+                Directory.Delete(_cacheBundleFilesRoot, true);
+            }
+        }
+
+        /// <summary>
+        /// 删除所有缓存的清单文件
         /// </summary>
         public void DeleteAllManifestFiles()
         {

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/EOverwriteInstallClearMode.cs

@@ -0,0 +1,29 @@
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 覆盖安装清理模式
+    /// </summary>
+    public enum EOverwriteInstallClearMode
+    {
+        /// <summary>
+        /// 不做任何处理
+        /// </summary>
+        None = 0,
+
+        /// <summary>
+        /// 清理所有缓存文件（包含资源文件和清单文件）
+        /// </summary>
+        ClearAllCacheFiles = 1,
+
+        /// <summary>
+        /// 清理所有缓存的资源文件
+        /// </summary>
+        ClearAllBundleFiles = 2,
+
+        /// <summary>
+        /// 清理所有缓存的清单文件
+        /// </summary>
+        ClearAllManifestFiles = 3,
+    }
+}

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/EOverwriteInstallClearMode.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c61fdc079dca97548a0158b8100ec258
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/Operation/DCFSInitializeOperation.cs

@@ -46,9 +46,32 @@ namespace YooAsset
                 // 如果水印发生变化，则说明覆盖安装后首次打开游戏
                 if (appFootPrint.IsDirty())
                 {
-                    _fileSystem.DeleteAllManifestFiles();
+                    if (_fileSystem.InstallClearMode == EOverwriteInstallClearMode.None)
+                    {
+                        YooLogger.Warning("Do nothing when overwrite install application !");
+                    }
+                    else if (_fileSystem.InstallClearMode == EOverwriteInstallClearMode.ClearAllCacheFiles)
+                    {
+                        _fileSystem.DeleteAllBundleFiles();
+                        _fileSystem.DeleteAllManifestFiles();
+                        YooLogger.Warning("Delete all cache files when overwrite install application !");
+                    }
+                    else if (_fileSystem.InstallClearMode == EOverwriteInstallClearMode.ClearAllBundleFiles)
+                    {
+                        _fileSystem.DeleteAllBundleFiles();
+                        YooLogger.Warning("Delete all bundle files when overwrite install application !");
+                    }
+                    else if (_fileSystem.InstallClearMode == EOverwriteInstallClearMode.ClearAllManifestFiles)
+                    {
+                        _fileSystem.DeleteAllManifestFiles();
+                        YooLogger.Warning("Delete all manifest files when overwrite install application !");
+                    }
+                    else
+                    {
+                        throw new System.NotImplementedException(_fileSystem.InstallClearMode.ToString());
+                    }
+
                     appFootPrint.Coverage(_fileSystem.PackageName);
-                    YooLogger.Warning("Delete manifest files when application foot print dirty !");
                 }
 
                 _steps = ESteps.SearchCacheFiles;