[R-pkg-devel] [External] compact vignettes

[Ivan Krylov]

В Wed, 23 Jul 2025 20:09:26 +0000
"Richard M. Heiberger" <rmh using temple.edu> пишет:

> When I use
> R_QPDF=/Library/Frameworks/R.framework/Resources/bin/qpdf
> R_GSCMD=/usr/local/bin/Cellar/ghostscript/10.03.0/bin/gs
> GS_QUALITY=ebook
> echo $R_QPDF $R_GSCMD $GS_QUALITY
> R CMD build --compact-vignettes=both microplot
> 
> I get 558950 bytes
> 
> The bytecount for the package went up.

Unfortunately, this seems to be very dependent on versions of software
in use, including LaTeX and Ghostscript (and fonts?). I can compress
your pre-built 372Kb vignette to 96Kb (as does the CRAN machine), but
when I rebuild the package, I can only get down from 276Kb to 156Kb:

R -q -s -e '
 untar("microplot_1.0-47.tar.gz.orig");
 tools::compactPDF(
  "microplot/inst/doc",
  gs_cmd = "gs", gs_quality = "ebook",
  verbose = TRUE
 )
'
qs_quality="ebook" : use_gs=TRUE, use_qpdf=TRUE
#{pdf}s = length(paths) = 1
- microplot/inst/doc/rmhPoster.pdf:    gs: res=0;  + qpdf: res=0; 
    ==> (new=98115)/(old=380862) = 0.257613 =====> using it !!
  compacted ‘rmhPoster.pdf’ from 372Kb to 96Kb


LANGUAGE=en R_GSCMD=gs GS_QUALITY=ebook R CMD build \
 --compact-vignettes=both microplot
<...>
* creating vignettes ... OK
<...>
* compacting vignettes and other PDF files
    compacted ‘rmhPoster.pdf’ from 276Kb to 156Kb

And 'gs --version' says '10.00.0', which shouldn't be that different
from your '10.03.0'!

-- 
Best regards,
Ivan