image.py, rootfs.py, package_manager.py: redirect stderr to stdout when calling check_output()

If a command executed with subprocess.check_output() fails, the
subprocess.CalledProcessError.output contains only STDOUT and the user
needs to check the log.do_rootfs to see any other details.

This commit forwards stderr to stdout so that, in case of failure, the
entire error output will be displayed in terminal.

[YOCTO #5902]

(From OE-Core rev: 4661f1441429952f30e19cebd93dc42ce31fd868)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/lib/oe/rootfs.py b/meta/lib/oe/rootfs.py
index be0afa6d74..90c0504b31 100644
--- a/meta/lib/oe/rootfs.py
+++ b/meta/lib/oe/rootfs.py
@@ -57,7 +57,7 @@ class Rootfs(object):
             exec_cmd = cmd
 
         try:
-            subprocess.check_output(exec_cmd)
+            subprocess.check_output(exec_cmd, stderr=subprocess.STDOUT)
         except subprocess.CalledProcessError as e:
             return("Command '%s' returned %d:\n%s" % (e.cmd, e.returncode, e.output))