checkPkgs: Check for presence of a package

In ufs: A Collection of Utilities

Check for presence of a package

Description

This function efficiently checks for the presence of a package without loading it (unlike library() or require(). This is useful to force yourself to use the package::function syntax for addressing functions; you can make sure required packages are installed, but their namespace won't attach to the search path.

Usage

checkPkgs(
  ...,
  install = FALSE,
  load = FALSE,
  repos = "https://cran.rstudio.com"
)

Arguments

...	A series of packages. If the packages are named, the names are the package names, and the values are the minimum required package versions (see the second example).
install	Whether to install missing packages from repos.
load	Whether to load packages (which is exactly not the point of this package, but hey, YMMV).
repos	The repository to use if installing packages; default is the RStudio repository.

Value

Invisibly, a vector of the available packages.

Examples

ufs::checkPkgs('base');

### Require a specific version
ufs::checkPkgs(ufs = "0.3.1");

### This will show the error message
tryCatch(
  ufs::checkPkgs(
    base = "99",
    stats = "42.5",
    ufs = 20
  ),
  error = print
);

ufs documentation built on May 29, 2024, 10:30 a.m.