Review Request 120480: decide at build time where the home of KDE4 is

[Marco Martin]

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https://git.reviewboard.kde.org/r/120480/
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Review request for KDE Frameworks.


Repository: kcoreaddons


Description
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Kdelibs4Migration used some heuristic to decide where ~/.kde4 was, was simply checking ~/.kde then ~/.kde4.
but in Plasma5 we need to be really sure where ~/.kde is since some settings are kept in sync even at srtartup (where ~/.kde doesn't exist, and we have to create it from kf5, that's why the kdehome() method)
also, checking for ~/.kde and ~/.kde4 may break in cases where a distribution uses ~/.kde4 for kde4, and used to have ~/.kde for kde3 (remnants of kde3 configs in user homes is very possible)

this adds a cmake option _KDE4_DEFAULT_HOME_POSTFIX coherent with _KDE_DEFAULT_HOME_POSTFIX of kdelibs4. so it would be responsibility of distributions to make this right.
on the other hand if the user changes distribution at the moment of the migration between kde4 and plasma5 this may break.


Diffs
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  src/lib/CMakeLists.txt 5ae5c08 
  src/lib/util/kdelibs4migration.h c26addc 
  src/lib/util/kdelibs4migration.cpp e1ec678 

Diff: https://git.reviewboard.kde.org/r/120480/diff/


Testing
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Thanks,

Marco Martin

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