Fix set score rendering

folkugat_web/services/lilypond/render.py

@@ -78,20 +78,26 @@ async def render_file(
         stderr=asyncio.subprocess.PIPE,
     )
 
-    _stdout, stderr = await proc.communicate()
+    stdout, stderr = await proc.communicate()
 
     if proc.returncode:
+        logger.warning(f"Lilypond process failed with return code: {proc.returncode}")
+        log_stream(stdout, "stdout")
+        log_stream(stderr, "stderr")
         errors = await _build_errors(input_file=input_file, stderr=stderr)
         return Result(error=errors)
 
     return Result(result=output_file)
 
 
+def log_stream(stream: bytes, name: str):
+    stream_lines = stream.decode("utf-8").splitlines()
+    for line in stream_lines:
+        logger.warning(f"[Lilypond {name}] {line}")
+
+
 async def _build_errors(input_file: Path, stderr: bytes) -> list[RenderError]:
     stderr_lines = stderr.decode("utf-8").splitlines()
-    logger.warning("Lilypond errors:")
-    for line in stderr_lines:
-        logger.warning(f"[LILYPOND] {line}")
     async with aiofiles.open(input_file, "r") as f:
         lines = await f.readlines()