[R-pkg-devel] Namespace problem with pre-R 3.0.0 package

I have just found that R 2 filled by itself the NAMESPACE file with
# Export all names
exportPattern(".")

# Import all packages listed as Imports or Depends
import(
    cluster
)


So I filled the NAMESPACE file with that and gave it to R 3
Now functions are found!


Is it enough to do that?

Yes. Even in the latest version of R, "R CMD build" will create a
default NAMESPACE file like that for you if one does not exist.

Is it good practice to do that?

No. The Writing R Extensions manual says "such broad patterns are not
recommended for production code: it is better to list all exports or
use narrowly-defined groups"

is .onLoad ... still required?

Yes, if your package has compiled code (e.g. C, C++, Fortran) then the
.onLoad function is required to load it into R.

Well, I do not use .onLoad but just the

useDynLib(packagename)

directive in the NAESPACE file.

Best,
Uwe Ligges

Martyn

Regards

Hi

I have issues with an R package developed in 2004.
It works perfectly in R < 3.
It can be installed in R > 3 but functions are not available.

Documentation I found is not really helpful for me who are not an R
master.
I have already fixed some problems with R CMD check but remaining
ones
are less trivial.


For what I understand - with R < 3 - everything is loaded with this
command in an R file in the R/ directory:
.First.lib <- function(lib, pkg) library.dynam("jacop", pkg, lib);
require("cluster")

Now I replaced that with
.onLoad <- function(lib, pkg) {library.dynam("jacop", pkg, lib);
require("cluster")}
but functions are not found when called.

NAMESPACE exists but is empty.


Any idea how to solve that?


Regards