What if you are on Windows but running R at the command prompt, or via cygwin, or in the console window of RStudio?
This seems unstable to me. On September 30, 2021 11:52:16 AM PDT, Andrew Simmons <akwsi...@gmail.com> wrote: >Hello, > > >I'm updating my package 'this.path' which is supposed to retrieve the >absolute path of the executing script when called. It's similar to 'here', >except that 'here' constructs paths relative to a project directory, >whereas 'this.path' constructs paths relative to script directories. I was >updating the section where I retrieve the executing script's path while >running from a script open in Rgui for Windows, and I needed >utils::getWindowsHandles to do such a thing. But utils::getWindowsHandles >is a Windows only function, I >would imagine that 'utils' contains a similar line of code as above: > > >if (.Platform$OS.type == "windows") > getWindowsHandles <- function() ... > > >and then in the NAMESPACE: > > >if (.Platform$OS.type == "windows") > export(getWindowsHandles) > > >so I'd like to change my code to getWindowsHandles and import >getWindowsHandles from utils, but I can only do that on Windows, and so the >conditional importing should work for me. At no point does my function >mis-behave because of a attempting to use a function that isn't exported on >that platform, because within the function it only uses getWindowsHandles >if the OS is Windows. > > >On Thu, Sep 30, 2021 at 11:01 AM Mark Miller <mark.roman.mil...@gmail.com> >wrote: > >> Returning to the original question, if it's helpful: I'd like to know what >> constraints led to considering an export only available on Windows, and see >> if we can suggest some other designs. It'd be good to keep the user's >> mental model abstracted from the platform they're working on. There are >> often unavoidable differences due to platform, but usually they're handled >> with warnings and errors rather than selective exports. >> >> On Thu, Sep 30, 2021 at 3:40 AM Berry Boessenkool < >> berryboessenk...@hotmail.com> wrote: >> >> > >> > One of the very best fortunes nominations! >> > >> > [...] >> > >> > I suspect something like >> > >> > if (stats::runif(1) > 0.5) export(someFunction) >> > >> > would work too, for a particularly frustrating experience for your >> > users. It would mean half the installs export the function, and half >> > don't. >> > >> > Duncan Murdoch >> > >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > R-package-devel@r-project.org mailing list >> > https://stat.ethz.ch/mailman/listinfo/r-package-devel >> > >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-package-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-package-devel >> > > [[alternative HTML version deleted]] > >______________________________________________ >R-package-devel@r-project.org mailing list >https://stat.ethz.ch/mailman/listinfo/r-package-devel -- Sent from my phone. Please excuse my brevity. ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
