D5413: makes KArchive be optional and do not build extractors needing it

[Heiko Becker]

heikobecker added a comment.


  In https://phabricator.kde.org/D5413#102273, @dfaure wrote:
  
  > Isn't this missing a "set_package_properties .. TYPE OPTIONAL" so that the user is told about the optional deps they're missing?
  >  Not sure if that works for KF5 components.
  
  
  No, OPTIONAL is the default. But I'd say that using set_package_properties(...) including a meaningful "DESCRIPTION" and "PURPOSE" (e.g. like it's done for the other optional deps) is much nicer to packagers and others who try to build kfilemetadata.

REPOSITORY
  R286 KFileMetaData

REVISION DETAIL
  https://phabricator.kde.org/D5413

To: mgallien
Cc: heikobecker, dfaure, #frameworks
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