From 50dabd5fe32356d9b12bd3fe92ae0259fe71acfb Mon Sep 17 00:00:00 2001
From: alex <53851759+alxxjohn@users.noreply.github.com>
Date: Tue, 16 Jun 2026 16:49:45 -0400
Subject: [PATCH] Fix for Writable file handle closed without error handling

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
---
 internal/codeguard/runner/support/diff_command.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/internal/codeguard/runner/support/diff_command.go b/internal/codeguard/runner/support/diff_command.go
index 375a059..43902c5 100644
--- a/internal/codeguard/runner/support/diff_command.go
+++ b/internal/codeguard/runner/support/diff_command.go
@@ -121,7 +121,7 @@ func copyDir(srcDir string, dstDir string) error {
 	})
 }
 
-func copyFile(srcPath string, dstPath string, mode os.FileMode) error {
+func copyFile(srcPath string, dstPath string, mode os.FileMode) (err error) {
 	src, err := os.Open(srcPath)
 	if err != nil {
 		return err
@@ -136,7 +136,11 @@ func copyFile(srcPath string, dstPath string, mode os.FileMode) error {
 	if err != nil {
 		return err
 	}
-	defer dst.Close()
+	defer func() {
+		if closeErr := dst.Close(); err == nil && closeErr != nil {
+			err = closeErr
+		}
+	}()
 
 	_, err = io.Copy(dst, src)
 	return err