Extract latex package names from tlmgr log

extract_latex_pkg_names_from_log.R

library(tidyverse)

# Find the names of latex packages installed by tlmgr
# (https://www.tug.org/texlive/tlmgr.html)
# The main reason to do this is so they can be pre-installed to a docker image.
#
# The latex package install output from tlmgr tends to look like this:
#
# ```
# tlmgr search --file --global '/multirow.sty'
# TeX Live 2016 is frozen forever and will no
# longer be updated.  This happens in preparation for a new release.
# 
# If you're interested in helping to pretest the new release (when
# pretests are available), please read http://tug.org/texlive/pretest.html.
# Otherwise, just wait, and the new release will be ready in due time.
# Trying to automatically install missing LaTeX packages...
# tlmgr install multirow
# TeX Live 2016 is frozen forever and will no
# longer be updated.  This happens in preparation for a new release.
# ```
#
# This script identifies the package names from such output

# Change path as needed
latex_log_path <- "temp/latex_package_install_log.txt"

read_lines(latex_log_path) %>%
  magrittr::extract(str_detect(., "tlmgr install")) %>%
  unique %>%
  magrittr::extract(!str_detect(., "package already present")) %>%
  map_chr(~str_remove_all(., "tlmgr install ")) %>%
  sort