groundhog: The Simplest Solution to Version-Control for CRAN Packages

Make R scripts that rely on packages 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 new 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 on CRAN at that date).

Version: 1.5.0
Published: 2021-09-07
Author: Uri Simonsohn ORCID iD [aut, cre], Hugo Gruson ORCID iD [ctb, aut]
Maintainer: Uri Simonsohn <urisohn at>
License: GPL-3
NeedsCompilation: no
Materials: README
In views: ReproducibleResearch
CRAN checks: groundhog results


Reference manual: groundhog.pdf


Package source: groundhog_1.5.0.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): groundhog_1.5.0.tgz, r-release (x86_64): groundhog_1.5.0.tgz, r-oldrel: groundhog_1.5.0.tgz
Old sources: groundhog archive


Please use the canonical form to link to this page.