uniq_pkg_deps: Count unique dependencies

Description

A function for package developers to count which direct dependencies add the most unique dependencies (direct plus downstream) in total.

Usage

uniq_pkg_deps(
  pkg,
  dep_type = c("depends", "imports", "linkingto"),
  pak_res = NULL,
  info_method = "pak",
  order = 1
)

Value

A data.table listing the packages, number of unique dependencies, and the unique dependencies themselves.

Arguments

pkg: a package to check
dep_type: type(s) of dependencies to look up. Valid values are c("depends", "imports", "linkingto")
pak_res: a pre-computed result from pak::pkg_deps
info_method: either "pak" or "tools". The latter will use tools::package_dependencies to look up package info.
order: Consider combinations of this many packages. Be careful going beyond 3.

Details

Use this function to tabulate which packages have the most unique downstream dependencies. For a package author, these are good targets to prioritize for removal if possible.

Because of the graph structure of dependencies, sometimes there isn't any one package that adds a lot of unique dependencies, but there is a PAIR or TRIPLET do. Set the order argument to check which pairs, triplets, etc have the most unique dependencies.

Examples

Run this code

uniq_pkg_deps("ggplot2", pak_res = pkg_deps_ex$ggplot2)
# ^ scales adds the most unique dependencies to ggplot2 -- 6 including itself.
# The `pak_res` argument here is a pre-computed result to avoid internet
# access while running the examples on CRAN's servers. It's not required.