groundhog

3.4.0Package record

Version-Control for CRAN, GitHub, and GitLab Packages

0packages depend

13.2Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Uri SimonsohnCRAN page ↗GitHub ↗Website ↗Issues ↗

Make R scripts reproducible, by ensuring that every time a given script is run, the same version of the used packages are loaded (instead of whichever version the user running the script happens to have installed). This is achieved by using the command groundhog.library() instead of the base command library(), and including a date in the call. The date is used to call on the same version of the package every time (the most recent version available at that date). Load packages from CRAN, GitHub, or Gitlab.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("groundhog", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("CredibilityLab/groundhog")

Development version from CredibilityLab/groundhog. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-groundhog

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-groundhog

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-groundhog

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.4 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 3.4.0

READMEYes · 289 wordsVignettesNoNEWSNoCitation fileNoWebsiteYes

Help pages: 10
Examples that run: 0%9 never run
Exported functions with examples: 90%
Documented parameters: 92%
Return-value docs: 60%
Help pages citing references: 0%

How these are measured

Downloads

13.2K

CRAN downloads in the past year

Rank #3,873 · ~36/day · ~1.1K/mo

Releases R versions

Daily download trend is not available in this view yet.

74730 days

2.4K90 days

13.2K1 year

Compare downloads with other packages →

Also on126 r2u8 autocran102 c2d4u

How downloads are counted

Repository

credibilitylab/groundhog ↗Organization: CredibilityLab

86Stars

4Forks

2Open issues

0Open PRs

13Releases

1,409Commits

7Commit identities

rr-packagereproducible-researchcranrstats

License file reads as GPL-3.0 · 1,409 commits · Last activity 2026-02-12 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 89%
Median days to close, 50 most recently updated closed issues: 8
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-07-22 · 832026-07-07 · 86

How these are measured

PracticesBeta

10 development-tooling and community-health practices detected across 6 families in the upstream repository

Checks run against github.com/credibilitylab/groundhog on 2026-10-11.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (3)

README.Rmd

GitHub Pages site last deployed 2024-10-06 · The repository has a site deploy workflow

Coverage (1)

Coverage reporting (Codecov)

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Show all practicesHide 2 practices

Lint, format, editor (1)

RStudio project

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing groundhog adds no packages beyond those that come with R.

Depends (1)

utils

Imports (1)

methods

LinkingTo (0)

none

Suggests (2)

git2r remotes

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (2)

Uri Simonsohn

Author, Maintainer since 1.1.0 (2021)

Hugo Gruson

Contributor, Author

Previously maintained by Hugo Gruson (1.0.0).

Releases (21)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
3.4.0Latest
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2026-01-10 · current release · diff ↗ ·
added 1 export
show_startup
3.3.0
record
2025-12-09 · diff ↗
3.2.3
record
2025-05-12 · diff ↗
R
R 4.5.0 released · 2025-04-11
3.2.2
record
2025-01-19 · diff ↗
3.2.1
record
2024-09-29 · diff ↗
R
R 4.4.0 released · 2024-04-24
3.2.0
record
2024-02-03 · diff ↗
3.1.2
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2023-10-13 · diff ↗
3.1.1
record
2023-08-21 · diff ↗
3.1.0
record
2023-05-05 · diff ↗
R
R 4.3.0 released · 2023-04-21
3.0.0
record
2023-04-20 · diff ↗ ·
removed 1 export
mran.is.up

added 2 exports
restore.library, try.renaming.method.again
2.2.1
record
2023-03-04 · diff ↗
2.2.0
record
2023-01-25 · diff ↗

Show 12 earlier eventsHide 12 earlier events

2.1.0
record
2022-10-02 · diff ↗
2.0.1
record
2022-08-06 · diff ↗
2.0.0
record
2022-07-12 · diff ↗ ·
removed 2 exports
reinstall.conflicts, see.unistalled.conflicts

added 1 export
mran.is.up
R
R 4.2.0 released · 2022-04-22
1.5.0
record
2021-09-07 · diff ↗
R
R 4.1.0 released · 2021-05-18
1.4.0
record
2021-05-03 · diff ↗ ·
added 1 export
meta.groundhog
1.3.2
record
2021-03-12 · diff ↗ ·
removed 3 exports
researchbox_code, researchbox_data, researchbox_other

added 3 exports
get.snowball, reinstall.conflicts, see.unistalled.conflicts
1.2.0
record
2021-01-14 · diff ↗
1.1.0
record
2021-01-04 · diff ↗ ·
added 3 exports
researchbox_code, researchbox_data, researchbox_other
1.0.0
record
2020-10-30
R
R 4.0.0 released · 2020-04-24

Package metadata

First published: 2020-10-30
Total releases: 21 / 6 yrs
License: GPL-3 OSI
Download size: 87 KB

Appears in task views

Reproducible Research

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("groundhog")

Format

Simonsohn, U., & Gruson, H. (2026). groundhog: Version-Control for CRAN, GitHub, and GitLab Packages (Version 3.4.0) [Computer software]. https://doi.org/10.32614/CRAN.package.groundhog

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for groundhog version 3.4.0 [Data set]. HJJB, LLC. Data release v2026-10-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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