From 109381f8a37bda7947f6dc461e949e2fd6a063dd Mon Sep 17 00:00:00 2001
From: Moritz Sallermann <moritzsallermann@gmail.com>
Date: Thu, 14 Mar 2024 17:03:10 +0000
Subject: [PATCH] Better error message in get_file_contents, if the file does
 not exist

---
 include/util/misc.hpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/util/misc.hpp b/include/util/misc.hpp
index 1f3f8bd..0baa0da 100644
--- a/include/util/misc.hpp
+++ b/include/util/misc.hpp
@@ -1,5 +1,9 @@
 #pragma once
+#include "fmt/format.h"
+#include <fmt/ostream.h>
+#include <filesystem>
 #include <fstream>
+#include <stdexcept>
 #include <string>
 
 namespace Seldon
@@ -7,6 +11,12 @@ namespace Seldon
 
 inline std::string get_file_contents( const std::string & filename )
 {
+    auto path = std::filesystem::path( filename );
+    if( !std::filesystem::exists( path ) )
+    {
+        throw std::runtime_error( fmt::format( "Canot read from {}. File does not exist!", fmt::streamed( path ) ) );
+    }
+
     std::ifstream in( filename, std::ios::in | std::ios::binary );
     if( in )
     {
@@ -18,7 +28,7 @@ inline std::string get_file_contents( const std::string & filename )
         in.close();
         return ( contents );
     }
-    throw( std::runtime_error( "Cannot read in file." ) );
+    throw( std::runtime_error( "Cannot read file." ) );
 }
 
 } // namespace Seldon
\ No newline at end of file