reinstallr

reinstallr is a tool to identify missing packages, e.g. after upgrading R, by scanning through your R files. If the missing packages are available on CRAN and you confirmed the install, install.packages is called. As a bonus, it provides some information about the packages you are using.

reinstallr is a little helper I wrote for myself and I'm glad if it's useful for anyone else. Pull requests to improve the package are very welcomed!

reinstallr searches for

• library(),
• require() and
• package::function/package:::function calls.

Installation

reinstallr is available on CRAN (stable) or via devtools::install_github (dev)

install.packages('reinstallr')

if (!requireNamespace("devtools", quietly = TRUE))
  install.packages("devtools")

devtools::install_github("calligross/reinstallr")

Usage

reinstallr(path = NULL, pattern = NULL, ...)

Per default reinstallr searches the working directory for R, Rmd, Rnw, Rhtml and Rpres files. After a reinstall the following might be enough to install all packages (from CRAN):

# All my R projects are located in ~/Documents/R/
reinstallr(path = '~/Documents/R/')

show_missing_packages() searches for missing packages and checks if the package is available on CRAN:

show_missing_packages(path = '~/Documents/R/')
#           package on_cran
# 1        lineprof   FALSE
# 2            BuBa   FALSE
# 3 metricsgraphics    TRUE

If you would like to find out, which packages you use, show_package_stats() is your friend:

show_package_stats(path = '~/Documents/R/')
# [...]
# 43        testthat  3
# 44       htmltools  4
# 45       lubridate  4
# 46        reshape2  4
# 47         twitteR  4
# 48            data  5
# 49      rstudioapi  5
# 50          scales  5
# 51        jsonlite  7
# 52           dplyr 10
# 53           knitr 11
# 54     htmlwidgets 12
# 55         ggplot2 17
# 56   rhandsontable 17
# 57  microbenchmark 18
# 58           shiny 34

find_used_packages() gives you the information, in which files a package is used:

find_used_packages(packages = c('dplyr', 'ggplot2'), path = '~/Documents/R/')