Package metadata for all releases — pac

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("cran", "crandb")
)

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("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

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) { # \dontrun{
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())
} # }