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My thoughts mostly related to non-Plasma, non-XDG run environments.

KF5 is a great addition, in hierarchy often sitting aside of Qt, not a part of 
XDG-compliant desktop. As such we can't say too much about the underlying OS. 
It may be XDG-compliant but athis can be a decission at various levels: by 
application developer or on deployment. Things can of course also change after 
the binary is compiled.

It's hard to see any benefit that apps 'pretend' being XDG-compliant by setting 
vartiables this way on, say, MS Windows or Mac. Qt applications on these 
systems do not traditionally alter the OS' paradigm, they are.. just apps, as 
native as possible/reasonable. Example: there are portable apps (on an USB 
stick) - I believe we can benefit if we help making them. These apps choose not 
to integrate too much with what's found on the system, often the user account 
is shared or temporary.

Setting the variable makes KConfig closer to specific groups of desktop, which 
is a a small step back. People may be interested in KConfig lib as a general 
purpose utility in their apps.
I'd compare setting the variable this way to setting Windows' USERPROFILE 
variable on Linux systems, just because it's standard under the former and 
under Wine. it does not hurt but leaves bad taste.

So the behaviour at least shall be ifdef'd and the ifdef shall depend on OS for 
which we're building. But if the same binary should behave well in various 
environments, I am unsure about hardcoding the behaviour. Also I am not sure if 
this behaviour should be ON by default. I'd rather have it OFF if it's present 
at all.

- Jarosław Staniek


On March 22, 2016, 4:23 p.m., Sandro Knauß wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/127462/
> -----------------------------------------------------------
> 
> (Updated March 22, 2016, 4:23 p.m.)
> 
> 
> Review request for KDE Frameworks and Matthew Dawson.
> 
> 
> Repository: kconfig
> 
> 
> Description
> -------
> 
> According to freedesktop specification XDG_*_HOME env varaible should be
> replaced, if they are not setted with default values.
> 
> https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
> 
> as qgetenv only calls getenv, so no path is traslated to it default values. 
> So we have to add this replacement manually. This would help to use 
> XDG_*_HOME more often in configfiles.
> 
> 
> Diffs
> -----
> 
>   autotests/kconfigtest.cpp e92197f3be57ead47b70ca5d040474e7a554c416 
>   src/core/kconfig.cpp 07fa6f552c61c52cc1dd64a1c5fb0e2f00873d50 
> 
> Diff: https://git.reviewboard.kde.org/r/127462/diff/
> 
> 
> Testing
> -------
> 
> Adding tests for XDG_*_HOME variables.
> 
> 
> Thanks,
> 
> Sandro Knauß
> 
>

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