Check and Fetch CRAN Package — check_and_fetch_cran

This function checks if a package exists on CRAN and retrieves the corresponding package URL and version details. If a specific version is not provided, the latest version is used.

Usage

check_and_fetch_cran_package(package_name, package_version = NULL)

Arguments

package_name: A character string specifying the name of the package to check and fetch.
package_version: An optional character string specifying the version of the package to fetch. Defaults to `NULL`.

Value

A list with one of the following structures:

package_url: Character string; the URL to download the package tarball.
last_version: A named list with version and date for the latest available version.
version: Character string; the requested version (or NULL if not specified).
all_versions: A list of named lists, each with version and date, representing all available versions.

Examples

if (FALSE) { # \dontrun{
# Check and fetch a specific version of "ggplot2"
result <- check_and_fetch_cran_package("ggplot2", package_version = "3.3.5")
print(result)
} # }