Feature request: platform-specific override for default-filter configuration

[nagisa]

Motivation

I want to ignore a family of tests that I know does not run on a certain platform by default.

I tried

[[profile.default.overrides]]
platform = 'cfg(target_os = "linux")'
default-filter = "none()"

and have found that this is not taken into account.

Proposal

I propose that platform-specific overrides for default-filter should be applied.

Alternatives

filterset could be extended to allow applying rules based on the platform? That would make it conditional, but...

I have also considered #[cfg_attr(..., ignore)] but in my case the tests affected are easier to filter out on a granularity of an entire crate/package, rather than individual tests.

Since I use a Justfile, I also have attempted to figure something out with the -E flags, but I have found that then it makes it difficult for users to specify their own filtersets via this flag as multiple -E flags are unioned rather than subset as is the behaviour with the default-filter set.

Additional context

No response

[sunshowers]

Yes -- this was definitely something I was intending to do as a followup!

[sunshowers]

We're going to likely need it at work soon, so implemented this: #1871

[sunshowers]

All right, this is part of cargo-nextest 0.9.84: https://nexte.st/docs/running/#per-platform-default-filters. Would love to hear your thoughts!