Increasing pipe buffer size for non win32 machines

Author: Your Name

render_machine/render_utils.py

@@ -6,6 +6,7 @@
 import threading
 import time
 from typing import Optional
+import fcntl
 
 import file_utils
 import git_utils
@@ -18,6 +19,7 @@
 POLL_INTERVAL_SECONDS = 0.2
 SIGTERM_GRACE_PERIOD_SECONDS = 0.2
 STDOUT_READ_TIMEOUT_SECONDS = 5
+F_SETPIPE_SZ = 1031  # Linux-only constant
 
 
 def revert_changes_for_frid(render_context):
@@ -101,6 +103,10 @@ def execute_script(  # noqa: C901
         start_new_session=(sys.platform != "win32"),
     )
 
+    if sys.platform != "win32":
+        # Set the pipe size to 1MB to avoid buffer overflows
+        fcntl.fcntl(proc.stdout.fileno(), F_SETPIPE_SZ, 1024 * 1024)  # 1MB
+
     try:
         while proc.poll() is None:
             if time.time() - start_time >= script_timeout: