[GitHub] [arrow] westonpace commented on pull request #35255: GH-35193: [Python][Packaging] Enable GCS on Windows wheels

["westonpace (via GitHub)" <gi...@apache.org>]

westonpace commented on PR #35255:
URL: https://github.com/apache/arrow/pull/35255#issuecomment-1544158180

   > Do you think Appveyor should be fixed here? Any idea what the issue/fix is?
   
   It would be nice to have at least one Windows CI job that uses GCS.  I don't know if the others do or not.
   
   > Any idea what the issue/fix is?
   
   Testbench is a standalone python project that emulates GCS.  This is very similar to how minio emulates S3.  The C++ unit tests launch testbench (using boost::process).  Since testbench is a python project the C++ tests need to be able to locate and run python.  It appears, on Windows, this is not working.
   
   Here is what the code to look for python looks like today:
   
   ```
       std::vector<std::string> names{"python3", "python"};
       // If the build script or application developer provides a value in the PYTHON
       // environment variable, then just use that.
       if (const auto* env = std::getenv("PYTHON")) {
         names = {env};
       }
       auto error = std::string(
           "Could not start GCS emulator."
           " Used the following list of python interpreter names:");
       for (const auto& interpreter : names) {
         auto exe_path = bp::search_path(interpreter);
         error += " " + interpreter;
         if (exe_path.empty()) {
           error += " (exe not found)";
           continue;
         }
   ```
   
   So maybe it's as easy as setting the `PYTHON` environment variable to point to a valid python executable?


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