[R] consider running tools::compactPDF(gs_quality = "ebook")

Søren Højsgaard @orenh @ending from m@th@@@u@dk
Sun Jul 8 10:41:43 CEST 2018

Dear all,

I run

R CMD build --compact-vignettes="both"  gRbase


R CMD build --compact-vignettes="gs+qpdf"  gRbase

and in the log from r-devel (on winbuilder) I get

* checking sizes of PDF files under 'inst/doc' ... WARNING
  'gs+qpdf' made some significant size reductions:
     compacted 'gRbase-arrays.pdf' from 421Kb to 115Kb
  consider running tools::compactPDF(gs_quality = "ebook") on these files

According to "writing R extensions" things should be fine (I have gs and qpdf on my system):

"The --compact-vignettes option will run tools::compactPDF over the PDF files in inst/doc (and its subdirectories) to losslessly compress them. This is not enabled by default (it can be selected by environment variable _R_BUILD_COMPACT_VIGNETTES_) and needs qpdf (http://qpdf.sourceforge.net/) to be available. "

Can anyone please tell me what to do?

Best regards


> sessionInfo()
R version 3.4.4 (2018-03-15)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.4 LTS

Matrix products: default
BLAS: /usr/lib/libblas/libblas.so.3.6.0
LAPACK: /usr/lib/lapack/liblapack.so.3.6.0

 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] Rcpp_0.12.17    shtools_1.0     markdown_0.8    knitr_1.20     
[5] rmarkdown_1.10  devtools_1.13.5

loaded via a namespace (and not attached):
 [1] lattice_0.20-35         digest_0.6.15           withr_2.1.2            
 [4] rprojroot_1.3-2         grid_3.4.4              backports_1.1.2        
 [7] magrittr_1.5            evaluate_0.10.1         stringi_1.2.3          
[10] curl_3.2                RcppArmadillo_0.8.500.0 Matrix_1.2-14          
[13] tools_3.4.4             RcppEigen_0.     stringr_1.3.1          
[16] compiler_3.4.4          memoise_1.1.0           htmltools_0.3.6

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