This drat package repository provides packages from other RcppCore code repositories.
# first add the repo
drat:::add("RcppCore")
# either install just one or more given packages
install.packages("Rcpp")
# or update already installed packages
update.packages()
# pass the repo info directly to install.packages()
install.packages("Rcpp", repos="https://RcppCore.github.io/drat")
Rscript -e 'install.packages("Rcpp", repos="https://RcppCore.github.io/drat")'
Packages in this repository are available under their respective license, which is generally GPL version 2 or newer.