R install and load necessary packages

r_libraries

# List of packages for session
package_list = c('devtools',
              'here',
              'tidyverse',
              'janitor',
              'magrittr',
              'parsedate')

# Install CRAN packages (if not already installed)
installed_packages <- package_list %in% installed.packages()
if(length(package_list[!installed_packages]) > 0) install.packages(package_list[!installed_packages])

# Load packages into session
lapply(package_list, require, character.only=TRUE)