[R-pkg-devel] Passing CRAN check when an examples must save a file
On 26/09/2019 11:43 p.m., Zachary Flynn wrote:
I am working on a function in a package that saves a file. I want to write an example to document the function so it must save a file, but when I do, the automatic CRAN checks reject the package because there is a non-standard file saved in the directory when the second test runs (first, it runs a test on Windows where the check error does not occur, then on Linux where it does). The relevant check output is: * checking for non-standard things in the check directory ... NOTE Found the following files/directories: ?Produc.csv? There is no file called Produc.csv anywhere in the directory (the error doesn't show up in the first run on Windows). It is generated by running the example code which automatic CRAN testing might be doing in between running the Windows and Linux checks? How do I write an example that must save a file to be an example of using the function without triggering this issue?
Save the file to the temporary directory, ?.g. filename <- file.path(tempdir(), "Prod?c.csv") write.csv(something, file = filename) You could clean up at the end of the example with unlink(filename) but you shouldn't rely on this alone to prevent the error: if you're writing files, you should *only* be doing it in the temporary directory. Duncan Murdoch