Andrew Schwartzmeyer created MESOS-8225:
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             Summary: Port os::which to Windows
                 Key: MESOS-8225
                 URL: https://issues.apache.org/jira/browse/MESOS-8225
             Project: Mesos
          Issue Type: Bug
          Components: stout, test
         Environment: Windows
            Reporter: Andrew Schwartzmeyer


The stout helper `os::which` fails on Windows uncondtionally because it tries 
using the `which` command, which of course doesn't exist. An equivalent is 
{{powershell -c get-command -type application}}; however, we may also just want 
to implement this in C++.

Sadly, because this fails, a lot of test filters fail. For instance, none of 
the {{INTERNET}} tests run because they use {{os::which}} to check for ping 
before running ping to check for internet connectivity. Ping does exist, but 
it's "not found" which is incorrect, and misleading.



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