sourcefrog
`--config=FILE` option
Some of my code is OS-specific, so on the "wrong" OS it ends up getting mutated when it does not even get compiled, causing false missed mutants.
It would be desirable to be able to provide OS-specific configuration. Thinking mainly of exclude globs here, though I suppose there may be other useful options.
The simplest implementation might be to just allow the config file to be provided by path. I see there is a --no-config but there does not appear to be a way to specify mutants_windows.toml or similar.
There is a workaround: just specify all the values on the command line and have a script wrapper around cargo-mutants. This is workable, though requires manual labor by everyone who needs to do OS-filtering, so something built-in might increase the total happines in the world.
There is already #50 about automatically understanding that #[cfg(windows)] isn't useful to mutate on !windows.
However it's also a good idea, and will be simpler to implement, to just take --config mutants-win.toml etc.
