Merge pull request #1324 from pypa/stderr-interleaving

joerick · web-flow · commit 89a8cac2aa68 · 2022-10-26T19:40:40.000+01:00
Fix #1161 - stdout is line-buffered during command execution
diff --git a/cibuildwheel/oci_container.py b/cibuildwheel/oci_container.py
@@ -303,9 +303,11 @@ def call(
                 return_code = int(return_code_str)
                 # add the last line to output, without the footer
                 output_io.write(line[0:footer_offset])
+                output_io.flush()
                 break
             else:
                 output_io.write(line)
+                output_io.flush()
 
         if isinstance(output_io, io.BytesIO):
             output = str(output_io.getvalue(), encoding="utf8", errors="surrogateescape")
