# HG changeset patch
# User Mathias De Mare <mathias.de_mare@nokia.com>
# Date 2019-01-11 12:14:25
# Node ID 92b3811fd15f0a9d0f795e85dec520a5f5c3ee15
# Parent  f3f5bfbf7e041f88d7db4f258b4f54319fefc2bd

hg-docker: fix Python 3.4 compatibility (for CentOS 7)

I realize Mercurial is not targetting Python 3.4 compatibility,
but without this change, it's not even possible to build it on
CentOS 7 (and I assume the same is true for RHEL 7).

Differential Revision: https://phab.mercurial-scm.org/D5570

diff --git a/contrib/packaging/hg-docker b/contrib/packaging/hg-docker
--- a/contrib/packaging/hg-docker
+++ b/contrib/packaging/hg-docker
@@ -72,7 +72,12 @@ def build_docker_image(dockerfile: pathl
     ]
 
     print('executing: %r' % args)
-    subprocess.run(args, input=dockerfile, check=True)
+    p = subprocess.Popen(args, stdin=subprocess.PIPE)
+    p.communicate(input=dockerfile)
+    if p.returncode:
+        raise subprocess.CalledProcessException(
+                p.returncode, 'failed to build docker image: %s %s' \
+                % (p.stdout, p.stderr))
 
 def command_build(args):
     build_args = []