Bug 404022

Summary:	query output of `manpath` command if possible
Product:	[Frameworks and Libraries] kio-extras	Reporter:	timor.dd
Component:	default	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	18.08.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description timor.dd 2019-02-06 15:59:57 UTC

SUMMARY

It would be nice to also parse the output of the `manpath` command instead of the $MANPATH environment variable, if the manpath command is available (it is installed with man-db, so it should virtually always be available ?).

This may even make parsing `/etc/manpath.config` by hand unnecessary, as well as looking into the $MANPATH environment variable, since the `manpath` command covers both these cases.

Note that this is not a duplicate of #22446.

The motivation for this case is that under NixOS, the manpath.conf is in a non-standard location, but `manpath` gives reliable output.

Although I don't fully understand how manpaths and catpaths work, the output of `manpath -c` might be useful instead of constructing something by hand based on `/etc/manpath.conf`, but that is just a hunch.

STEPS TO REPRODUCE
1. Install KDE on nixos
2. install kio-extras with man protocol support

OBSERVED RESULT
Open Help center, notice empty man pages section

EXPECTED RESULT
find all man pages in the man pages section

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS 18.09
(available in About System)
KDE Plasma Version: 5.13.4
KDE Frameworks Version: 5.49.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION