>>>>> Lluís Revilla writes:
> Yes, I think that would be enough.
Thanks. And of course add documentation ...
Will try to get this in in the next few days.
Best
-k
> Thank you, Kurt!
> Lluís
> On Wed, 12 Jun 2024 at 16:35, Kurt Hornik <kurt.hor...@wu.ac.at> wrote:
>>>>>> Lluís Revilla writes:
> Lluis,
> So in available.packages() I could replace
> if (is.null(fields))
> fields <- requiredFields
> else {
> stopifnot(is.character(fields))
> fields <- unique(c(requiredFields, fields))
> }
> by someting like
> if(is.null(fields))
> fields <- getOption("available_packages_fields")
> if(is.null(fields))
> fields <- requiredFields
> else {
> stopifnot(is.character(fields))
> fields <- unique(c(requiredFields, fields))
> }
> ?
> Best
> -k
>> Hi all,
>> I have recently been researching how available.packages and
>> install.packages filter packages from repositories with additional
> fields
>> in their PACKAGES file.
>> Currently there are some default filters, but users (and R admins) can
> set
>> up their own filters by passing a list to the fields argument or adding
>> them to the "available_packages_filters" option.
>> But if the fields used by the filters are not read by default, then
> users
>> must manually add the required fields to each call to
> available.packages.
>> This makes it difficult to use new fields and to control what is
> installed
>> in highly regulated systems which want to use more fields to select
> what is
>> installed.
>> Current workarounds considered are:
>> 1) The filtering function requiring new fields intercepts the call to
>> available.packages and adds the desired fields via eval in
>> parent.environment and then adds the filters again.
>> 2) Import new data (remote or local) when filtering packages, merge
> them
>> and filter accordingly.
>> 3) Suggestions?
>> The first solution is complicated, while the second doesn't use the R
>> machinery of tools::write_PACKAGES to set up the repository with all
> the
>> fields (although how to add more fields to the repository file is a
>> different issue).
>> Would it be possible to add a new option to add fields to be read by
>> available.packages, similar to filters?
>> The same approach for fields as for filters would avoid the two
> workarounds
>> mentioned. To match it, the new option could be named
>> "available_packages_fields".
>> I look forward to hearing from you,
>> Lluís
>> [[alternative HTML version deleted]]
>> ______________________________________________
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