[infra] #33309 automatically apply spotless

[je-ik]

Closes #33309

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.41%. Comparing base (d379968) to head (cd02853).
Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #33310   +/-   ##
=========================================
  Coverage     57.41%   57.41%           
  Complexity     1474     1474           
=========================================
  Files           970      970           
  Lines        154481   154481           
  Branches       1076     1076           
=========================================
  Hits          88701    88701           
  Misses        63578    63578           
  Partials       2202     2202           

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[je-ik]

Added spotlessApply for now, I'm not familiar with the other formatting tools mentioned in the ML.

R: @damccorm @kennknowles

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[kennknowles]

Will this have the right source sets? I would expect the sources for each subdirectory to need its own task with the overridden source set. (and yes i see this will conflict with the top-level source set - not sure what is the best solution)

[je-ik]

Yes, this is somewhat due to how flink runner is built. Spotless is applied using :runners:flink:spotlessApply, although the runner is built using e.g. :runners:flink:1.18:build. This only makes the :runners:flink:spotlessApply called automatically for all versions.