For the original question:
> what are a packages dependencies
tools:::package.dependencies(available.packages())
> what are a packages reverse dependencies
tools:::dependsOnPkgs(available.packages()[,1])
> does a package contain a dll
If the package has been installed already and you want to get the number
of dlls in libs:
length(grep("\\.dll$", dir(system.file(package="foo", "libs"))))
or if not installed, you can get an idea by looking at the check logs on
CRAN. If they contain a line
* checking line endings in C/C++/Fortran sources/headers ... OK
they also contain compiled code. This is not a save test, though.
Uwe Ligges
On 14.01.2010 12:27, Colin Millar wrote:
Thanks Gabor,
Are you or anyone aware if there is a text list of of package contents? The
only way i have managed to get information like the number of dlls per package
is by downloading the zip file to a tempporary file and listing its contents
via unzip(..., list = TRUE). However, downloading every package on CRAN is a
time consuming so if there was a more efficient way of finding the contents of
each it would be useful to know.
The code i am using on R2.10.1 on windows 7
contriburl<-
"http://cran.uk.r-project.org/bin/windows/contrib/2.10<http://cran.uk.r-project.org/bin/windows/contrib/2.10>
"
destdir<- "C:/colin/SCOTS-user-group/pkgs"
lab.pkgs<- c("gamair","mgcv","survival","lme4","nlme","lattice","MASS","nnet","splines","stats4",
"stats", "methods")
available<- available.packages(contriburl = contriburl)
fnames<- paste(available[,"Repository"], available[,"File"], sep = "/")
tmpf<- paste(tempfile(), ".zip", sep = "")
pkg.contents<- lapply(fnames, function(x) {download.file(x, tmpf); unzip(tmpf,
list = TRUE)})
ndlls<- sapply(pkg.contents, function(x) sum( grepl( ".dll", x $ Name )))
pkg.summ<- data.frame(pkg = rownames(available), dll = ndlls)
Thanks again,
Colin.
________________________________
From: Gabor Grothendieck [mailto:ggrothendi...@gmail.com]
Sent: Wed 13/01/2010 22:09
To: Colin Millar
Cc: r-help@r-project.org
Subject: Re: [R] R package dependencies
See the dep function defined here:
http://tolstoy.newcastle.edu.au/R/e6/help/09/03/7159.html
On Wed, Jan 13, 2010 at 11:39 AM, Colin Millar<c.mil...@marlab.ac.uk> wrote:
Hi there,
My question relates to getting information about R packages. In particular i
would like to be able to find from within R:
what are a packages dependencies
what are a packages reverse dependencies
does a package contain a dll
The reason i ask is:
The organisation that i work for is introducing a secure intranet operating on
windows PCs and laptops, and this requires that all software / executables /
dlls are validated before they are combined to produce a generic PC build.
I would like to maximise the packages available to our staff and so for the
packages that we have listed as buisness needs, i would like to include all
reverse dependencies of this collection that do not have dlls.
I hope this makes sense (the question not the reason).
Kind regards,
Colin.
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