D22418: wayland: make automatic backend selection truly automatic

[Alexey Min]

alexeymin created this revision.
alexeymin added reviewers: romangg, zzag.
Herald added a project: KWin.
Herald added a subscriber: kwin.
alexeymin requested review of this revision.

REVISION SUMMARY
  Choose backend automatically, based on actually available
  plugins at runtime, independently of kwin compile options.
  Don't limit command line options too.

TEST PLAN
  compile kwin without some of backends. Then
  compile kwin with that backend separately, manually
  copy the appropriate plugin into plugins directory.
  Verify that `kwin_wayland --help` lists that option,
  and running kwin_wayland without arguments, with proper
  environment automatically selects proper backend plugin.

REPOSITORY
  R108 KWin

BRANCH
  alexeymin/automatic-backend-selection

REVISION DETAIL
  https://phabricator.kde.org/D22418

AFFECTED FILES
  main_wayland.cpp

To: alexeymin, romangg, zzag
Cc: kwin, plasma-devel, LeGast00n, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart
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