CI to use python3 on the mac instances

[serban-nicusor-toptal]

Submission Checklist

• [ ] Run unit tests: ./runTests.py src/test/unit
• [ ] Run cpplint: make cpplint
• [ ] Declare copyright holder and open-source license: see below

Summary

See: https://github.com/stan-dev/performance-tests-cmdstan/pull/41

Intended Effect

How to Verify

Side Effects

Documentation

Copyright and Licensing

Please list the copyright holder for the work you are submitting (this will be you or your assignee, such as a university or company):

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

[serban-nicusor-toptal]

Hey @WardBrian do we need python3 in the Mac Unit too ?

[WardBrian]

I don’t believe so, only the performance tests have changed

[WardBrian]

It looks like Jenkins isn't queuing new jobs pending a restart, but the currently running Math/develop job is preventing it from restarting. Do we want to kill the math develop job and restart it later, or let Jenkins queue for a day?

[serban-nicusor-toptal]

Jenkins is going to shut down for maintenance at Flatiron so I think the queued jobs will not be executed until it's back online anyway.

[WardBrian]

The relevant tests are now passing. The failure was due to a merge in stanc before math had a chance to percolate up (math also had some weird CI failures)