From fcde5809559e6d58c88f6b6d83295fccec01a243 Mon Sep 17 00:00:00 2001
From: Roberto Rossini <71787608+robomics@users.noreply.github.com>
Date: Mon, 7 Oct 2024 01:03:37 +0200
Subject: [PATCH] Ensure no temporary files are written when balancing .hic
 files with --in-memory

---
 src/hictk/balance/common.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/hictk/balance/common.hpp b/src/hictk/balance/common.hpp
index 53b0a20e..a06ee862 100644
--- a/src/hictk/balance/common.hpp
+++ b/src/hictk/balance/common.hpp
@@ -192,7 +192,9 @@ inline int balance_hic(const BalanceConfig& c, const std::filesystem::path& tmp_
   }
 
   const auto tmpfile =
-      tmp_dir / (std::filesystem::path{c.path_to_input}.filename().string() + ".tmp");
+      tmp_dir.empty()
+          ? ""
+          : tmp_dir / (std::filesystem::path{c.path_to_input}.filename().string() + ".tmp");
 
   const auto params = init_params<Balancer>(c, tmpfile);
   typename Balancer::Type mode{};