filesystem.h surface error codes (#998)

- Improvement: File copy, scan, clone, and move operations now report the underlying OS error in failure messages

1 files changed, 10 insertions, 2 deletions

diff --git a/src/zenserver/hub/hydration.cpp b/src/zenserver/hub/hydration.cpp
index 4b2294b49..259171b49 100644
--- a/src/zenserver/hub/hydration.cpp
+++ b/src/zenserver/hub/hydration.cpp
@@ -239,7 +239,11 @@ namespace hydration_impl {
 						  [this, Hash = IoHash(Hash), SourcePath = std::filesystem::path(SourcePath)](std::atomic<bool>& AbortFlag) {
 							  if (!AbortFlag.load())
 							  {
-								  CopyFile(SourcePath, m_CASPath / fmt::format("{}", Hash), CopyFileOptions{.EnableClone = true});
+								  std::filesystem::path DestPath = m_CASPath / fmt::format("{}", Hash);
+								  if (std::error_code Ec = CopyFile(SourcePath, DestPath, CopyFileOptions{.EnableClone = true}); Ec)
+								  {
+									  throw std::system_error(Ec, fmt::format("Failed to copy '{}' to '{}'", SourcePath, DestPath));
+								  }
 							  }
 						  });
 	}
@@ -256,7 +260,11 @@ namespace hydration_impl {
 			[this, Hash = IoHash(Hash), DestinationPath = std::filesystem::path(DestinationPath)](std::atomic<bool>& AbortFlag) {
 				if (!AbortFlag.load())
 				{
-					CopyFile(m_CASPath / fmt::format("{}", Hash), DestinationPath, CopyFileOptions{.EnableClone = true});
+					std::filesystem::path SourcePath = m_CASPath / fmt::format("{}", Hash);
+					if (std::error_code Ec = CopyFile(SourcePath, DestinationPath, CopyFileOptions{.EnableClone = true}); Ec)
+					{
+						throw std::system_error(Ec, fmt::format("Failed to copy '{}' to '{}'", SourcePath, DestinationPath));
+					}
 				}
 			});
 	}