Mostly to lighten the dependency tree using tools that is built in with R would 
remove one additional dependency.  Also clarity; the tools directory adds an R 
folder for distinction that they are used with R packages which seemed like if 
a user was ever investigating, they would have a better idea where those files 
came from.



Lori Shepherd

Bioconductor Core Team

Roswell Park Comprehensive Cancer Center

Department of Biostatistics & Bioinformatics

Elm & Carlton Streets

Buffalo, New York 14263

________________________________
From: Bioc-devel <bioc-devel-boun...@r-project.org> on behalf of Aaron Lun 
<infinite.monkeys.with.keyboa...@gmail.com>
Sent: Wednesday, April 7, 2021 4:10 AM
To: bioc-devel@r-project.org <bioc-devel@r-project.org>
Subject: Re: [Bioc-devel] Updates to BiocFileCache, AnnotationHub, and 
ExperimentHub

rebook and basilisk are also currently using rappdirs. I would be
interested in the motivation behind the switch for the Hubs and whether
that is applicable to those two packages as well.

-A

On 4/5/21 6:41 AM, Kern, Lori wrote:
> We are in process of making some major updates to the caching in 
> BiocFileCache, AnnotationHub, and ExperimentHub.  Namely, the default caching 
> location will change from using rappdirs::user_cache_dir   to using  
> tools::R_user_dir  eventually relieving the dependency on rappdirs.  To avoid 
> conflicting default caches, if anyone used an old default caching directory, 
> there will be an error to decide how to deal with the old location before 
> proceeding and documentation in the vignettes for how to resolve.  Currently 
> I have update BiocFileCache, the changes were just pushed to the devel branch 
> and should propagate tonight.  I plan on doing the same for both 
> AnnotationHub and ExperimentHub within the next few days.  We appreciate any 
> feedback or questions with regards to these updates.
>
> This is only relevant to using the default cache location,  if a user 
> manually specified a unique location, used environment variables, or created 
> a package specific cache the code/location is not affected.  Anyone using 
> package specific caching that utilizes rappdirs is encouraged also to 
> consider changing package code to use the now available function in tools.
>
> Cheers,
>
>
> Lori Shepherd
>
> Bioconductor Core Team
>
> Roswell Park Comprehensive Cancer Center
>
> Department of Biostatistics & Bioinformatics
>
> Elm & Carlton Streets
>
> Buffalo, New York 14263
>
>
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