Output directory errors with trailing slash on Windows

[bbbales2]

Someone told me that they were having troubles specifying the output_dir argument with a trailing slash. I checked in Linux and it works so maybe this is a Windows thing?

Close if it's not possible to reproduce.

Here's a model:

parameters {
  real a;
}

model {
  a ~ normal(0, 1);
}

Here's R to get an error:

library(cmdstanr)
model = cmdstan_model("test.stan")
dir.create("whatever")
fit = model$sample(output_dir = "./whatever/")

[jgabry]

I checked in Linux and it works so maybe this is a Windows thing?

Works fine on my mac too. So yeah maybe a Windows thing?

[jgabry]

Not urgent at all, but @rok-cesnovar when you have a chance can you check if you can reproduce this on Windows?

[rok-cesnovar]

Ah, forgot to post earlier today that yes, I can reproduce on Windows.

While Unix systems dont mind folder//filename, Windows does not like this. Will hopefully finish a PR tomorrow together with some other Windows related fixes and improvements.

[jgabry]

Ok thanks!