[R-pkg-devel] Saving output of check()

[Henrik Bengtsson]

R CMD check, which is used internally runs checks in standalone
background R processes.  Output from these is not capturable/sinkable
by the master R process.  The gist of what's happening is:

> sink("output.log")
> system("echo hello")  ## not sinked/captured
hello
> sink()
> readLines("output.log")
character(0)

/Henrik

On Wed, Apr 11, 2018 at 11:05 AM, J C Nash <profjcnash at gmail.com> wrote:
> Hi,
>
> In trying to test that an upgrade to my optimx package does not break other
> packages, I wanted to loop over a list of all such packages in alldep, with
> nall the length of this list.
>
> cat("Check the dependent packages\n")
> for (ii in 1:nall){
>   cpkg <- alldep[ii]
>   dd <- "/home/john/temp/wrkopt/dlpkg"
>   dlname <- download.packages(cpkg, destdir=dd )[[2]]
>   cat("Downloaded ", dlname,"\n")
>   cpkg.chk <- devtools::check_built(dlname)
>   cat("Results package:",cpkg,"\n")
>   print(cpkg.chk)
> }
>
> Before running this, I did
>
> sink("dpkgcheck.txt", split=TRUE)
>
> and afterwards, I did sink().
>
> But ... none of the check output, nor the result of the final print, show
> up in the output file dpkgcheck.txt.
>
> Have I totally misunderstood sink(), or is there a nasty bug?
>
> I've tried running in Rstudio and in the terminal. I'm running Linux Mint
> 18.3 Sylvia.
>
> Linux john-j6-18 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10 16:32:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
> john at john-j6-18 ~ $ R
>
> R version 3.4.4 (2018-03-15) -- "Someone to Lean On"
>
>
> J C Nash
>
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