[R-pkg-devel] R-devel problem with temporary files or decompression?

Uwe Ligges ligges at statistik.tu-dortmund.de
Sun Jul 12 17:38:46 CEST 2015

On 12.07.2015 17:33, Daniel Kelley wrote:
> A data file that I’d like to use in my “oce” package is quite large, and compresses well, so I thought of putting a compressed version into inst/extdata. I want my documentation to show how to uncompress the file, partly because these files tend to compress so well that I think users might like to store them in gzipped form.
> Naturally, I want to test my code using R-devel in addition to the ‘release’ version that I have on my box. Since I’ve never been able to get R-devel installed properly on OSX, I thought of submitting to win-builder. I got errors as below my signature line. What I don’t understand is the “Invalid argument”, which seems to be different from the “No such file or directory” that I would expect to get if there were no file. Any ideas on how to proceed?
> Dan Kelley / Oceanography / Dalhousie University / Halifax NS Canada
>> ### ** Examples
>> library(oce)
>> ## A CTD-style rsk
>> if (requireNamespace("R.utils")) {
> +   file <- system.file("extdata", "sample.rsk.gz", package="oce")
> +   tmp <- tempfile(fileext=".rsk")
> +   R.utils::decompressFile(file, destname=tmp, ext="gz", FUN=gzfile, remove=FALSE)
> +   rsk <- read.rsk(tmp)
> +   ctd <- as.ctd(rsk)
> +   plot(ctdTrim(ctd))
> + }
> Loading required namespace: R.utils
> Warning in file(file, "r") :
>    cannot open file 'd:/RCompile/CRANguest/R-devel/oce.Rcheck/examples_i386/D:\temp\RtmpGUYumI\file29ac3bed3fed.rsk':

Apparently you have put together the location of the current path and 
the one of the tempfile which does not make sense.

So very likely a bug in your code. Surprise you do not see it on your end.

Uwe Ligges

> Invalid argument
> Error in file(file, "r") : cannot open the connection
> Calls: read.rsk -> file
> Execution halted
> ** running examples for arch 'x64' ... ERROR
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