Modifications to permit running on MacOS

[jmeyers314]

No description provided.

[jfcrenshaw]

LGTM.

One question: Are the stdout and stderr arguments you added to runProgram required for Mac compatibility, or are you just adding those because they're useful to have in certain contexts?

[jmeyers314]

Are the stdout and stderr arguments you added to runProgram required for Mac compatibility

Actually, it just occurred to me that this is probably a generic shlex compatibility problem, and not just on MacOS. For example, if you try subprocess.call(shlex.split("ls &> ls.log"), shell=False), instead of piping stderr/stdout to ls.log, ls complains that it can't find the files &> and ls.log. I guess redirection doesn't work when handing subprocess.call a list instead of a string.

There's at least one line in ts_imsim where this matters: https://github.com/lsst-ts/ts_imsim/blob/develop/python/lsst/ts/imsim/closedLoopTask.py#L1191. I'll add that to this ticket and look around for any others.

So thanks for asking!

See note about shlex stdout/stderr piping above

[jfcrenshaw]

LGTM. You just need to rebase and bump the version patch number once more.