Optional Readonlybioconductorthe Bioconductor host
Optional Readonlybioconductorthe Bioconductor release (release, devel, or a number like 3.20)
Optional Readonlycranthe CRAN src/contrib/ to fetch tarballs from
Optional Readonlygithubwhether to use the read-only GitHub mirrors of CRAN (cran/<pkg>) and Bioconductor (bioc/<pkg>), which keep every version as a tag
what a source may be configured with, see
solver.sigdb.onDemand