This function constructs the CRAN package URL for a specified package and version.
Arguments
- package_name
A character string specifying the name of the package.
- version
An optional character string specifying the version of the package. If `NULL`, the latest version is assumed.
- last_version
A named list with elements version and date, representing the latest available version and its publication date.
- all_versions
A list of named lists, each with elements version and date, representing all known versions of the package and their publication dates.
Value
A character string containing the URL to download the package tarball, or "No valid URL found" if the version is not found in the list of available versions.
Examples
if (FALSE) { # \dontrun{
# Example data structure
last_version <- list(version = "1.0.10", date = "2024-01-01")
all_versions <- list(
list(version = "1.0.0", date = "2023-01-01"),
list(version = "1.0.10", date = "2024-01-01")
)
# Get the URL for the latest version of "dplyr"
url <- get_cran_package_url("dplyr", NULL, last_version, all_versions)
print(url)
} # }