From fa3c348bfef7c14d99205d923d5cf6ab6aefa7bc Mon Sep 17 00:00:00 2001
From: Kathryn Baldauf <k_baldauf@apple.com>
Date: Thu, 16 Oct 2025 14:23:39 -0700
Subject: [PATCH] Add close method to IO writer protocol (#336)

Add close method to IO writer protocol and update testing BufferWriter
to conform to the protocol

Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>
---
 Sources/Containerization/IO/Writer.swift | 1 +
 Sources/Integration/ContainerTests.swift | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/Sources/Containerization/IO/Writer.swift b/Sources/Containerization/IO/Writer.swift
index 9c2b4ff0..5eb2db26 100644
--- a/Sources/Containerization/IO/Writer.swift
+++ b/Sources/Containerization/IO/Writer.swift
@@ -19,4 +19,5 @@ import Foundation
 /// A type that writes the provided Data.
 public protocol Writer: Sendable {
     func write(_ data: Data) throws
+    func close() throws
 }
diff --git a/Sources/Integration/ContainerTests.swift b/Sources/Integration/ContainerTests.swift
index ff55dbba..e6668d38 100644
--- a/Sources/Integration/ContainerTests.swift
+++ b/Sources/Integration/ContainerTests.swift
@@ -72,6 +72,10 @@ extension IntegrationSuite {
             }
             self.data.append(data)
         }
+
+        func close() throws {
+            return
+        }
     }
 
     final class StdinBuffer: ReaderStream {