Mock 5.4 writes build log (and possibly other logs) into root log

[Korulag]

Short description of the problem

It appears that mock 5.4 is not closing root log after preparing the environment and continues to write there the whole build process log. It was not the case on 4.1, I didn't check other 5.* versions because updates brought 5.4.

Output of rpm -q mock

mock-5.4-1.el8.noarch

Steps to reproduce issue

1. Build any package from src.rpm:
   mock --configdir $config_dir --root $root --verbose --rebuild $src.rpm --resultdir $rpm_result --define ... --no-cleanup-after
2. Check produced root log

On 4.1 the root logs ends like so:

DEBUG util.py:167:  kill orphans
DEBUG util.py:621:  child environment: None

And a bunch of umount comands. On 5.4 it just continues.
Even more, it looks like installed_packages log is also included.

[praiskup]

Indeed, while build.log contains the output, it is duplicated in root.log. Thank you for the report.

[praiskup]

The --verbose option seems to trigger this misbehavior.

[Korulag]

Yes, we enable verbose output when using mock in some cases. Thanks for investigation @praiskup !