How does raise_error combine with log format expected from plugins?

[marbu]

After #2023 was implemented, we implemented etckeeper-dnf5 plugin using it, but then we run into issues when trying to add log.INFO format into output of the plugin now tracked as bz 2383751.

So I wonder. With actions file like this:

# to be placed in /etc/dnf/libdnf5-plugins/actions.d
# requires dnf5 5.2.11.0 or later
pre_base_setup:::raise_error=1:/usr/bin/sh -c /usr/bin/etckeeper\ pre-install\ \|\ /usr/bin/sed\ -e\ 's/^/log.INFO=/'
post_transaction::::/usr/bin/sh -c /usr/bin/etckeeper\ post-install\ \|\ /usr/bin/sed\ -e\ 's/^/log.INFO=/'

Is it expected that raise_error=1 doesn't cause the error to be propagated, or we need to change the way we format the logs from the plugin? Also, is the log format mandatory?