A proper "renv update" script

gistfile1.txt

#####################################
## This script will install all the packages listed in the renv.lock file. 
## It is different to `renv::restore()`, because it will install the latest available versions of each package, rather than the versions that were used when the lockfile was created
##
## This is equivalent to a 'composer update' in php (while renv::restore() is equivalent to 'composer install').
##
## Written because `renv::update()` only updates packages that are currently installed, so is not helpful when the versions specified in a lock file no longer install properly. 
#####################################

install.packages("jsonlite")

library(jsonlite)

# Load the renv lock file
renv_packages <- jsonlite::fromJSON("renv.lock")

# get the keys of the list of packages
package_names <- names(renv_packages$Packages)

# install the packages (this will take a while)
install.packages(package_names)

# update the .lock file with the latest versions
renv::snapshot()