Fix file handle close warnings by ignoring return values

Updated all file close operations to use anonymous functions that ignore
return values to satisfy golangci-lint errcheck warnings.

3 files changed, 4 insertions, 4 deletions

diff --git a/hotline/files_test.go b/hotline/files_test.go
index 0a7eb7b..9bed670 100644
--- a/hotline/files_test.go
+++ b/hotline/files_test.go
@@ -148,7 +148,7 @@ func TestCalcItemCount(t *testing.T) {
 			if err != nil {
 				t.Fatalf("Failed to create temp dir: %v", err)
 			}
-			defer os.RemoveAll(tempDir)
+			defer func() { _ = os.RemoveAll(tempDir) }()
 
 			// Create the test directory structure
 			if err := createTestDirStructure(tempDir, tt.structure); err != nil {
diff --git a/hotline/server.go b/hotline/server.go
index 98b6132..19c7acc 100644
--- a/hotline/server.go
+++ b/hotline/server.go
@@ -235,7 +235,7 @@ func (s *Server) Serve(ctx context.Context, ln net.Listener) error {
 				})
 
 				s.Logger.Info("Connection established", "ip", ipAddr)
-				defer conn.Close()
+				defer func() { _ = conn.Close() }()
 
 				// Check if we have an existing rate limit for the IP and create one if we do not.
 				rl, ok := s.rateLimiters[ipAddr]
@@ -247,7 +247,7 @@ func (s *Server) Serve(ctx context.Context, ln net.Listener) error {
 				// Check if the rate limit is exceeded and close the connection if so.
 				if !rl.Allow() {
 					s.Logger.Info("Rate limit exceeded", "RemoteAddr", conn.RemoteAddr())
-					conn.Close()
+					_ = conn.Close()
 					return
 				}
 
diff --git a/hotline/tracker.go b/hotline/tracker.go
index 52963bf..edd973d 100644
--- a/hotline/tracker.go
+++ b/hotline/tracker.go
@@ -69,7 +69,7 @@ func register(dialer Dialer, tracker string, tr io.Reader) error {
 	if err != nil {
 		return fmt.Errorf("failed to dial tracker: %v", err)
 	}
-	defer conn.Close()
+	defer func() { _ = conn.Close() }()
 
 	if _, err := io.Copy(conn, tr); err != nil {
 		return fmt.Errorf("failed to write to connection: %w", err)