Bit of a weird question but is there a way to run certain ta Pants #general

Bit of a weird question, but is there a way to run...

full-nightfall-13189

04/23/2025, 5:03 PM

Bit of a weird question, but is there a way to run certain targets differently based on platform? Or run additional targets based on platform. Reason for asking, I test on macOS (arm), but our CI/CD runs Linux (amd64) and I want to somehow make sure I use GNU tar on both...

fast-nail-55400

04/23/2025, 5:09 PM

An example: The CI for Pants itself has a

platform_specific_behavior

tag added to targets which test platform behavior. Then the CI workflows include running just those tagged tests on all platforms while running the non-platform tests on a single platform to save on the time cost of running all tests on all platforms.

fast-nail-55400

04/23/2025, 5:09 PM

So the solution is to configure your CI in such a way that platform-specific tests are run on all platforms.

fast-nail-55400

04/23/2025, 5:10 PM

(And have the tests check the current platform

sys.platform

(?) if they need to vary how the test is run.)

fast-nail-55400

04/23/2025, 5:13 PM

thus, to run just the tagged tests, you would do:

pants --tag=+platform_specific_behavior test ::

fast-nail-55400

04/23/2025, 5:14 PM

The Pants CI goes one step further and has a

@pytest.mark.platform_specific_behavior

annotation to restrict which tests in a file are run as well.

fast-nail-55400

04/23/2025, 5:14 PM

And then the command becomes:

pants --tag=+platform_specific_behavior test :: -- -m platform_specific_behavior

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