potiuk opened a new pull request, #24610:
URL: https://github.com/apache/airflow/pull/24610

   Instead of bash-based, complex logic script to perform PR selective
   checks we now integrated the whole logic into Breeze Python code.
   
   It is now much simplified, when it comes to algorithm. We've
   implemented simple rule-based decision tree. The rules describing
   the decision tree are now are now much easier
   to reason about and they correspond one-to-one with the rules
   that are implemented in the code in rather straightforward way.
   
   The code is much simpler and diagnostics of the selective checks
   has also been vastly improved:
   
   * The rule engine displays status of applying each rule and
     explains (with yellow warning message what decision was made
     and why. Informative messages are printed showing the resulting
     output
   
   * List of files impacting the decision are also displayed
   
   * The names of "ci file group" and "test type" were aligned
   
   * Unit tests covering wide range of cases are added. Each test
     describes what is the case they demonstrate
   
   * `breeze selective-checks` command that is used in CI can also
     be used locally by just providing commit-ish reference of the
     commit to check. This way you can very easily debug problems and
     fix them
   
   Fixes: #19971
   
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