Package version life duration at specific Date or for a specific version

a package life duration for a certain version or at a specific Date. By default works for the newest package version.

pac_lifeduration(
  pac,
  version = NULL,
  at = NULL,
  lib.loc = .libPaths(),
  repos = biocran_repos(),
  source = c("cran", "crandb")
)

Arguments

pac: character a package name.
version: character version of a package. Default: NULL
at: Date from which to take the version. Default: NULL
lib.loc: character vector of search paths with local packages. Default: .libPaths()
repos: character vector of repositories URLs to use. By default checking CRAN and newest Bioconductor per R version. Default pacs::biocran_repos()
source: character one of c("cran", "crandb"). Using the MEATCRAN CRANDB or the direct web page download from CRAN. When "crandb" is set then options(pacs.crandb_ntry = 3) and options(pacs.crandb_nsleep = 0.001) can be used to control the fetch. "pacs.crandb_ntry" can be used to set the maximum number of try outs, by default 3. "pacs.crandb_nsleep" can be used to set the sleep duration between fetch try outs, by default 0.001. Default: "cran"

Value

difftime, number of days package version was the newest one.

Note

Results are cached for 30 minutes with memoise package. The crandb R packages database is a part of METACRAN project, source: Csárdi G, Salmon M (2022). pkgsearch: Search and Query CRAN R Packages. https://github.com/r-hub/pkgsearch, https://r-hub.github.io/pkgsearch/. For source = "cran"the function will scrap two CRAN URLS. Works only with CRAN packages. Please as a courtesy to the R CRAN, don't overload their servers by constantly using this function.

Examples

if (FALSE) { # \dontrun{
pacs::pac_lifeduration("memoise")
pacs::pac_lifeduration("memoise", source = "cran")
pacs::pac_lifeduration("dplyr", version = "0.8.0")
pacs::pac_lifeduration("dplyr", at = as.Date("2019-02-14"))
# For Bioconductor packages it will work only for the newest per R version and installed ones.
pacs::pac_lifeduration("S4Vectors")
} # }