Print a sort list of packages used in an R script file.

show_packages_used.R

# Prints a sort list of packages actually used in a script file.
# Note that the packages must be loaded for this to work.
show_packages_used <- \(script_file_name) {
  script_file_name %>%
    NCmisc::list.functions.in.file() %>%
    names() %>%
    stringr::str_extract_all("(?<=package:).\\w*", simplify = TRUE) %>%
    c() %>%
    purrr::keep(~ . != "") %>%
    unique() %>%
    sort() %>%
    cat(sep = "\n")
}