Using CRAN website to get a package metadata used at a specific Date or a Date interval or for specific version.

pac_timemachine(
  pac,
  at = NULL,
  from = NULL,
  to = NULL,
  version = NULL,
  source = c("crandb", "cran")
)

Arguments

pac

character a package name.

at

Date from which to take the version. Default: NULL

from

Date the lower limit. Default: NULL

to

Date the upper limit. Default: NULL

version

character version of a package. Default: NULL

source

character one of c("crandb", "cran"). Using the MEATCRAN CRANDB or the direct web page download from CRAN. Default: "crandb"

Value

data.frame with 7 columns

Package

character package name.

Version

character package version.

Released

character release Date

Archived

character archived Date.

LifeDuration

difftime number of days the version was the newest one.

URL

character the suffix of the base URL to tar.gz file. The base part of URL in the result is https://cran.r-project.org/src/contrib/.

Size

character size of the tar.gz file.

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) {
pacs::pac_timemachine("dplyr")
pacs::pac_timemachine("dplyr", at = as.Date("2017-02-02"))
pacs::pac_timemachine("dplyr", from = as.Date("2017-02-02"), to = as.Date("2018-04-02"))
pacs::pac_timemachine("dplyr", at = Sys.Date())
pacs::pac_timemachine("tidyr", from = as.Date("2020-06-01"), to = Sys.Date())
}