From beb5a3db5eb9105ea5a28c814c37be788f5feab4 Mon Sep 17 00:00:00 2001
From: Joel Rosdahl <joel@rosdahl.net>
Date: Sat, 3 Dec 2022 13:33:33 +0100
Subject: [PATCH] enhance: Add AtomicFile::flush method

---
 src/AtomicFile.cpp | 9 +++++++++
 src/AtomicFile.hpp | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/AtomicFile.cpp b/src/AtomicFile.cpp
index c9d82c3e2..9c0f0cb3c 100644
--- a/src/AtomicFile.cpp
+++ b/src/AtomicFile.cpp
@@ -59,6 +59,15 @@ AtomicFile::write(nonstd::span<const uint8_t> data)
   }
 }
 
+void
+AtomicFile::flush()
+{
+  if (fflush(m_stream) != 0) {
+    throw core::Error(
+      FMT("failed to flush data to {}: {}", m_path, strerror(errno)));
+  }
+}
+
 void
 AtomicFile::commit()
 {
diff --git a/src/AtomicFile.hpp b/src/AtomicFile.hpp
index 37ac37228..033a3fa3c 100644
--- a/src/AtomicFile.hpp
+++ b/src/AtomicFile.hpp
@@ -38,6 +38,7 @@ public:
 
   void write(std::string_view data);
   void write(nonstd::span<const uint8_t> data);
+  void flush();
 
   // Close the temporary file and rename it to the destination file. Note: The
   // destructor will not do this automatically to avoid half-written data in the
-- 
2.47.2