Does pants* know how to use xdist?
# developmentm
melodic-thailand-99227
10/31/2021, 3:32 PMmelodic-thailand-99227
10/31/2021, 3:34 PMFound the relevant docs
e
enough-analyst-54434
10/31/2021, 3:34 PMIt does not. It runs each test file in parallel with all others. It cannot, however run each test within a file in parallel like xdist can.
enough-analyst-54434
10/31/2021, 3:34 PMSo if you have a huge test file with lots of slow tests, that will be the long pole.
m
melodic-thailand-99227
10/31/2021, 3:35 PMCan I get a worker from pants?
melodic-thailand-99227
10/31/2021, 3:36 PMOr better, can I tell if pants is running me?
e
enough-analyst-54434
10/31/2021, 3:36 PMI'm not sure what you mean by a worker - can you explain more?
m
melodic-thailand-99227
10/31/2021, 3:37 PMContext: I’m using
pytest-djangoe
enough-analyst-54434
10/31/2021, 3:37 PMAh, gotcha - we expose an environment variable for things like this - just a sec...
enough-analyst-54434
10/31/2021, 3:40 PMYou want to confgure an environment variable name in your pants.toml for `[pytest] execution_slot_var`: https://www.pantsbuild.org/docs/reference-pytest#section-execution-slot-var
enough-analyst-54434
10/31/2021, 3:41 PMenough-analyst-54434
10/31/2021, 3:43 PMenough-analyst-54434
10/31/2021, 3:43 PMThere is a good bit to look at in that example repo, this too: https://github.com/pantsbuild/example-django/blob/567f181e736b62fbaad99c870027e334a82af2c3/pytest.ini
m
melodic-thailand-99227
10/31/2021, 3:44 PMSeems to work! Thanks!
e
enough-analyst-54434
10/31/2021, 3:45 PMI'm not too Django literate, but we do want to support Django as best possible; so if you find anything hard or confusing to do - please file issues or ask.