nchammas opened a new pull request, #58136:
URL: https://github.com/apache/spark/pull/58136

   ### What changes were proposed in this pull request?
   
   Refactor how we ignore file patterns when determining what modules to test. 
Use `pathlib.PurePath` glob-style patterns instead of regexes.
   
   ### Why are the changes needed?
   
   #56312 captured ignored patterns as a `dev-tools` module that has special 
handling. The problem is that test module detection is additive, so a change to 
`python/README.md` triggers `dev-tools` _and_ `pyspark-install` and 
`pyspark-core`. You can see this in the [CI run associated with][1] 
https://github.com/apache/spark/commit/75ac74bafec1f489224765041a19bec6bad36a9d.
   
   [1]: https://github.com/apache/spark/actions/runs/32265494187/job/96146278679
   
   There is also a problem with using regexes for these ignore patterns because 
most of the patterns include extensions like `.sh` or `.md` without escaping 
the `.`. This leads to the unlikely but nonetheless surprising case of 
`README1md` matching the `README.md` pattern.
   
   ### Does this PR introduce _any_ user-facing change?
   
   No.
   
   ### How was this patch tested?
   
   I ran the existing doctests on `utils.py`.
   
   ### Was this patch authored or co-authored using generative AI tooling?
   
   I wrote this with assistance from GitHub Copilot.
   


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