On Thursday 11 August 2011, meik michalke wrote: > > You mention producing this info by a script, and I think it would really > > be a good idea to have something roughly equivalent to > > package.skeleton() for rkward plugins, indeed. > > yes, that was exactly where i was going. it would also be nice to have a > simple dialog for that, where you could type in some basic info.
True. And that dialog itself could be implemented as a plugin, I think.
> > However, I think producing this in XML format is not really _that_ much
> > harder to implement.
>
> let's say: it's absolutely possible. but it can't get much easier than
> giving a data.frame to a function of R-base, and read it back the same
> way, i guess.
>
> [i used some stuff from the XML package in one of my packages, which worked
> great, but i had to throw it out again after there was no windows binary
> available for some time, as it turned out after i received support
> inquiries from people who couldn't update my package (it was a limited
> thing, i wrote my own parser then to get rid of the dependency again). is
> there any XML support in the base installation? if not, we'd have to write
> it ourselves, if we need it, e.g. to create a package skeleton.]
For this particular purpose, I would not look for any "real" XML support, but
simply paste text. I.e. along the lines of:
writeAttributes <- function (attribs) {
output <- ""
for (i in 1:length (attribs)) {
output <- paste (output, " ", names(attribs)[i], "=", dQuote
(atttribs[i]), sep="")
}
output
}
writeAbout <- function (name, version, authors, [...]) {
output <- ""
output <- paste (output, "<about", writeAttributes (c (name=name,
version=version, [...])), sep="")
for (author in authors) {
output <- paste (output, "<author", writeAttributes (author),
"/>\n", sep="")
}
[...]
output <- paste (ouput, "/>\n", sep="")
output
}
writeAbout (name="Square the circle", version="0.1", authors=list (
c (name="John Doe", email="..."),
c (name="...")
), [...])
etc.
Regards
Thomas
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