This is simply not true. Sys.which() should accept absolute paths,
and does on my systems (even my Windows system). However, it looks
like you gave an unescaped path containing spaces. Most likely you
need to include that path in double quotes (just as you would on a
Windows shell).
On Wed, 30 May 2012, Henrik Bengtsson wrote:
Bump, in case it was missed. This is also the case with R Under
development (unstable) (2012-05-25 r59443). /Henrik
On Fri, Apr 20, 2012 at 2:00 PM, Henrik Bengtsson <h...@biostat.ucsf.edu> wrote:
Hi,
in help("R_GSCMD") it says "R_GSCMD: Optional. The path to
Ghostscript, used by dev2bitmap, bitmap and embedFonts. Consulted when
those functions are invoked.". However, if 'R_GSCMD' contains a full
pathname to the Ghostscript executable (as above "path" indicates),
e.g.
Sys.getenv("R_GSCMD")
[1] "C:\\Program Files\\gs\\gs8.71\\bin\\gswin32c.exe"
then 'R CMD check' will report
* checking sizes of PDF files under 'inst/doc' ... NOTE
Unable to find GhostScript executable to run checks on size reduction
Setting 'R_GSCMD' to "gswin32c.exe" and asserting that it is the PATH
(this is on Windows), it works.
TROUBLESHOOTING:
In the local function check_doc_size() of tools:::.check_packages()
[cf. http://svn.r-project.org/R/trunk/src/library/tools/R/check.R],
the Ghostscript executable is retrieved as:
gs_cmd <- find_gs_cmd(Sys.getenv("R_GSCMD", ""))
and if nzchar(gs_cmd) is FALSE, then the 'R CMD check' NOTE appears.
Inspecting tools:::find_gs_cmd, this corresponds to
gs_cmd <- Sys.which(Sys.getenv("R_GSCMD", ""))
iff 'R_GSCMD' is set. In other words, tools:::find_gs_cmd() assumes a
basename not a full pathname.
SUGGESTIONS:
Update tools:::find_gs_cmd() to test for file existence before turning
to Sys.which(), e.g.
find_gs_cmd <- function (gs_cmd)
{
if (!nzchar(gs_cmd)) {
if (.Platform$OS.type == "windows") {
gs_cmd <- Sys.which("gswin64c")
if (!nzchar(gs_cmd))
gs_cmd <- Sys.which("gswin32c")
gs_cmd
}
else Sys.which("gs")
} else {
if (file.exists(gs_cmd) && !file.info(gs_cmd)$isdir)
gs_cmd
else
Sys.which(gs_cmd)
}
}
/Henrik
sessionInfo()
R version 2.15.0 Patched (2012-04-08 r58935)
Platform: x86_64-pc-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] R.methodsS3_1.4.0 tools_2.15.0
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--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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