refactor: New FileUtilities class

For recursively deleting read-only directories.

src/Common/Common.csproj

@@ -5,6 +5,7 @@
     <PackageReference Include="Flurl.Http" />
     <PackageReference Include="Newtonsoft.Json" />
     <PackageReference Include="Serilog" />
+    <PackageReference Include="System.IO.Abstractions" />
     <PackageReference Include="System.Reactive" />
     <PackageReference Include="YamlDotNet" />
   </ItemGroup>

src/Common/FileUtilities.cs

@@ -0,0 +1,36 @@
+using System.IO;
+using System.IO.Abstractions;
+
+namespace Common;
+
+public class FileUtilities : IFileUtilities
+{
+    private readonly IFileSystem _fileSystem;
+
+    public FileUtilities(IFileSystem fileSystem)
+    {
+        _fileSystem = fileSystem;
+    }
+
+    public void DeleteReadOnlyDirectory(string directory)
+    {
+        if (!_fileSystem.Directory.Exists(directory))
+        {
+            return;
+        }
+
+        foreach (var subdirectory in _fileSystem.Directory.EnumerateDirectories(directory))
+        {
+            DeleteReadOnlyDirectory(subdirectory);
+        }
+
+        foreach (var fileName in Directory.EnumerateFiles(directory))
+        {
+            var fileInfo = _fileSystem.FileInfo.FromFileName(fileName);
+            fileInfo.Attributes = FileAttributes.Normal;
+            fileInfo.Delete();
+        }
+
+        _fileSystem.Directory.Delete(directory);
+    }
+}

src/Common/IFileUtilities.cs

@@ -0,0 +1,6 @@
+namespace Common;
+
+public interface IFileUtilities
+{
+    void DeleteReadOnlyDirectory(string directory);
+}

src/Trash/CompositionRoot.cs

@@ -5,6 +5,7 @@ using System.Reflection;
 using Autofac;
 using Autofac.Core.Activators.Reflection;
 using CliFx;
+using Common;
 using Serilog;
 using Serilog.Core;
 using Trash.Command.Helpers;
@@ -79,6 +80,7 @@ public static class CompositionRoot
     public static IContainer Setup(ContainerBuilder builder)
     {
         builder.RegisterType<FileSystem>().As<IFileSystem>();
+        builder.RegisterType<FileUtilities>().As<IFileUtilities>();
 
         builder.RegisterModule<CacheAutofacModule>();
         builder.RegisterType<CacheStoragePath>().As<ICacheStoragePath>();