From 6189b0e744400d3c37a8b5e85d063d1ee0f6e5c7 Mon Sep 17 00:00:00 2001
From: Ivan Blinkov <github@blinkov.ru>
Date: Mon, 3 Feb 2020 13:33:47 +0300
Subject: [PATCH] Fix error handling in docs

---
 docs/tools/util.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/docs/tools/util.py b/docs/tools/util.py
index aad7364594d..5715650cfd1 100644
--- a/docs/tools/util.py
+++ b/docs/tools/util.py
@@ -2,6 +2,7 @@ import contextlib
 import multiprocessing
 import os
 import shutil
+import sys
 import tempfile
 import threading
 
@@ -26,9 +27,15 @@ def autoremoved_file(path):
 
 def run_function_in_parallel(func, args_list, threads=False):
     processes = []
+    exit_code = 0
     for task in args_list:
         cls = threading.Thread if threads else multiprocessing.Process
         processes.append(cls(target=func, args=task))
         processes[-1].start()
     for process in processes:
         process.join()
+        if not threads:
+            if process.exitcode and not exit_code:
+                exit_code = process.exitcode
+    if exit_code:
+        sys.exit(exit_code)