Collect Version Histories For Vendor Products
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#' Retrieve Virtualbox Version Release History
#'
#' Reads <https://download.virtualbox.org/virtualbox/> to build a data frame of
#' Virtualbox version release numbers and dates with semantic version
#' strings parsed and separate fields added. The data frame is also arranged in
#' order from lowest version to latest version and the `vers` column is an
#' ordered factor.
#'
#' @md
#' @export
virtualbox_version_history <- function() {
pg <- xml2::read_html("https://download.virtualbox.org/virtualbox/")
rvest::html_node(pg, "pre") %>%
rvest::html_text() %>%
stri_split_lines() %>%
unlist() %>%
stri_trim_both() %>%
keep(stri_detect_regex, "^[[:digit:]]") %>%
discard(stri_detect_fixed, "_") %>%
stri_match_first_regex("^([^/]+)/[[:space:]]+([[:digit:]]{2}-[[:alpha:]]{3}-[[:digit:]]{4})") %>%
.[,2:3] %>%
as.data.frame(stringsAsFactors=FALSE) %>%
dplyr::as_tibble() %>%
dplyr::select(vers = V1, rls_date = V2) %>%
tidyr::separate(vers, into = c("major", "minor", "patch"), sep = "\\.", remove = FALSE) %>%
dplyr::mutate(
rls_date = lubridate::dmy(rls_date),
rls_year = lubridate::year(rls_date)
) %>%
dplyr::select(vers, rls_date, rls_year, major, minor, patch) %>%
dplyr::arrange(as.integer(major), as.integer(minor), as.integer(patch)) %>%
dplyr::mutate(vers = factor(vers, levels = vers))
}