From 95e088de72be378bef6b379d954dd9f5cea87e6b Mon Sep 17 00:00:00 2001
From: vigress8 <vig@disroot.org>
Date: Mon, 9 Dec 2024 20:38:50 +0400
Subject: [PATCH] refactor(libutil): add new constructor to `SysError` using
 `std::error_code`

Change-Id: I6150d7966442551f0b6f7a0cc9739a4f9d6c4e7e
---
 lix/libutil/error.hh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lix/libutil/error.hh b/lix/libutil/error.hh
index 451319494..a81f3f9cd 100644
--- a/lix/libutil/error.hh
+++ b/lix/libutil/error.hh
@@ -26,6 +26,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <system_error>
 
 namespace nix {
 
@@ -194,6 +195,15 @@ public:
         err.msg = HintFmt("%1%: %2%", Uncolored(hf.str()), strerror(errNo));
     }
 
+    template<typename... Args>
+    SysError(std::error_code ec, const Args & ... args)
+        : Error("")
+    {
+        errNo = ec.value();
+        auto hf = HintFmt(args...);
+        err.msg = HintFmt("%1%: %2%", Uncolored(hf.str()), ec.message());
+    }
+
     template<typename... Args>
     SysError(const Args & ... args)
         : SysError(errno, args ...)