[Omake] Inconsistent rm behavior between Unix/Windows

[Andrew Gacek]

The 'rm' command (in osh) behaves differently on Unix and Windows when
used on read-only files. In Unix, the osh rm command uses the built-in
Unix rm command and removes a file even if it is read-only. On
Windows, the osh rm command uses ocaml's Unix.unlink which returns an
error when trying to delete a read-only file. Using the -f option does
not change this behavior except that the error on Windows is no longer
displayed to the user.

Is this a bug?

Right now I am working around the issue on Windows by replacing

  rm -rf foo

with

  chmod -rf 200 foo && rm -rf foo

Which seems to work but has the side-effect that it displays an error
message if the directory foo does not exist.

Thanks,
Andrew