Allow users to provide custom host functions to WasiRunner
and WasiEnvBuilder
#4403
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This PR updates
WasiEnvBuilder
andWasiRunner
to allow providing custom imports that will be used when instantiating a WASIX module.I've also re-worked the
WasiRunner
's builder methods to all follow thefn with_xxx(&mut self, ...) -> &mut Self
pattern. TheRunner
trait'srun_command()
method already takes&mut self
, so that means people can doWasiRunner::new().with_args(...).run_command(...)
without needing to introduce an intermediate variable. This should be more ergonomic than forcing people to builder methods that either consume or setters that don't allow chaining.