Re: [Rd] Bug in tools::compactPDF() in 2.13-0-alpha

From: Duncan Murdoch <murdoch.duncan_at_gmail.com>
Date: Sun, 27 Mar 2011 09:00:37 -0400

On 11-03-27 8:48 AM, Gavin Simpson wrote:
> Dear List,
>
> There seems to be an bug in compactPDF() or at least an inconsistency
> with the documented behaviour.

Thanks, looks easy to fix. I'll make the correction. (A bit more below...)

>
> The documentations states:
>
> Details:
>
> This by default makes use of ‘qpdf’, available from<URL:
> http://qpdf.sourceforge.net/>, including a Windows binary. If
> ‘gs_cmd’ is non-empty, GhostScript is used.
>
> I don't have qpdf on my system so planned to use ghostscript. However,
> the code for compactPDF() has as it's first few lines:
>
> if (!nzchar(Sys.which(qpdf)))
> return()
>
> So because I don't have qpdf, compactPDF() always returns NULL:
>
>> nzchar(Sys.which(Sys.getenv("R_QPDF", "qpdf")))
> [1] FALSE
>
>> compactPDF("../analogue/pkg/inst/doc/analogue_methods.pdf", gs_cmd = "/usr/bin/")

That won't work: you need the full path to the gs_cmd, not just its home directory.

Duncan Murdoch

> NULL
>
> no matter what I do.
>
> This is with:
>
>> sessionInfo()
> R version 2.13.0 alpha (2011-03-27 r55077)
> Platform: x86_64-unknown-linux-gnu (64-bit)
>
> locale:
> [1] LC_CTYPE=en_GB.utf8 LC_NUMERIC=C
> [3] LC_TIME=en_GB.utf8 LC_COLLATE=en_GB.utf8
> [5] LC_MONETARY=C LC_MESSAGES=en_GB.utf8
> [7] LC_PAPER=en_GB.utf8 LC_NAME=C
> [9] LC_ADDRESS=C LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_GB.utf8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] tools stats graphics grDevices utils datasets
> [7] methods base
>
> Thanks,
>
> Gavin



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