Download a specified version of a CRAN package

It downloads the package to a temporary file, and returns the name of the file.

Usage

download_version(
  package,
  version = NULL,
  repos = getOption("repos"),
  type = getOption("pkgType"),
  ...
)

Arguments

package

Name of the package to install.

version

Version of the package to install. Can either be a string giving the exact version required, or a specification in the same format as the parenthesized expressions used in package dependencies. One of the following formats:

• An exact version required, as a string, e.g. "0.1.13"

• A comparison operator and a version, e.g. ">= 0.1.12"

• Several criteria to satisfy, as a comma-separated string, e.g. ">= 1.12.0, < 1.14"

• Several criteria to satisfy, as elements of a character vector, e.g. c(">= 1.12.0", "< 1.14")

repos

character vector, the base URL(s) of the repositories to use, e.g., the URL of a CRAN mirror such as "https://cloud.r-project.org". For more details on supported URL schemes see url.

Can be NULL to install from local files, directories or URLs: this will be inferred by extension from pkgs if of length one.

type

character, indicating the type of package to download and install. Will be "source" except on Windows and some macOS builds: see the section on ‘Binary packages’ for those.

...

Other arguments passed on to utils::install.packages().

Value

Name of the downloaded file.