Bioconductor hosts a couple of 'extra' packages, with the current set of 'release' packages annotated here:
It is rather nice that Bioconductor mirrors a subset of packages from external repositories. However, it appears to me that there is no content within the package / package DESCRIPTION that denotes such packages could be retrieved from Bioconductor.
This is a problem for 'shinyapps', as normally we infer whether a particular package came from Bioconductor based on the presence of a 'biocViews' tag within the package DESCRIPTION (which, IIUC, is mandatory for all packages submitted / hosted on Bioconductor, barring these 'extra' packages)
Would it be possible for Bioconductor to annotate these packages in some way that would allow a user to discover after-the-fact that the package was obtained from Bioconductor -- perhaps with 'biocViews: extra' or some other kind of metadata appended to the package DESCRIPTION? Of course, we can maintain our own list but from a reproducibility standpoint it would be useful to be able to infer the origin of a particular installed package.