Provide a command to delete all forwarder buffers.

src/SeqCli/Cli/Commands/Forwarder/TruncateCommand.cs

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 using System;
+using System.IO;
 using System.Threading.Tasks;
 using SeqCli.Cli.Features;
 using Serilog;
@@ -37,7 +38,11 @@ protected override async Task<int> Run(string[] args)
         {
             if (!_confirm.TryConfirm("All data in the forwarder's log buffer will be deleted. This cannot be undone."))
                 return 1;
-
+
+            foreach (var bufferStorageDirectory in Directory.GetDirectories(_storagePath.BufferPath))
+            {
+                Directory.Delete(bufferStorageDirectory, true);
+            }
             return 0;
         }
         catch (Exception ex)

src/SeqCli/Forwarder/Channel/ForwardingChannelMap.cs

@@ -34,13 +34,13 @@ ForwardingChannel OpenOrCreateChannel(string? apiKey, string name)
         // TODO, when it's not the default, persist the API key and validate equality on reopen
 
         var storePath = Path.Combine(_bufferPath, name);
-        var defaultStore = new SystemStoreDirectory(storePath);
+        var store = new SystemStoreDirectory(storePath);
         Log.Information("Opening local buffer in {StorePath}", storePath);
 
         return new ForwardingChannel(
-            BufferAppender.Open(defaultStore),
-            BufferReader.Open(defaultStore),
-            Bookmark.Open(defaultStore),
+            BufferAppender.Open(store),
+            BufferReader.Open(store),
+            Bookmark.Open(store),
             _connection,
             apiKey,
             _shutdownTokenSource.Token);

src/SeqCli/Forwarder/Storage/BufferAppender.cs

@@ -45,7 +45,7 @@ public static BufferAppender Open(StoreDirectory storeDirectory)
     }
 
     /// <summary>
-    /// Try write a batch.
+    /// Try to write a batch.
     ///
     /// This method does not throw.
     ///