hardhat

Overview

About

Maintained by Hannah FrickFirst published 2019-12-1617 releasesCRAN page ↗GitHub ↗

Building modeling packages is hard. A large amount of effort generally goes into providing an implementation for a new method that is efficient, fast, and correct, but often less emphasis is put on the user interface. A good interface requires specialized knowledge about S3 methods and formulas, which the average package developer might not have. The goal of 'hardhat' is to reduce the burden around building new modeling packages by providing functionality for preprocessing, predicting, and validating input.

Install

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

install.packages("hardhat", 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("tidymodels/hardhat")

Development version from tidymodels/hardhat. 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-hardhat

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

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-hardhat

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-hardhat

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 4.7 min · r-devel-linux-x86_64-fedora-gcc

Code health

Yes

Tests · ratio 0.93

97.4%

Coverage · measured lines

100%

Documentation · exports

Yes

Vignettes

Yes

README

6

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Downloads

2.1M

CRAN downloads in the past year

Rank #273 · ~5.8K/day · ~176.9K/mo

Releases R versions

Daily download trend is not available in this view yet.

142.9K30 days

502.5K90 days

2.1M1 year

Compare downloads with other packages →

Also on28.7K r2u27 autocran275.4K conda_forge5.1K c2d4u

Repository

GitHub ↗ tidymodels/hardhat

Dependencies

Declared dependencies

17 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1

Imports (6)

cli glue rlang sparsevctrs tibble vctrs

LinkingTo (0)

none

Suggests (12)

covr crayon devtools knitrMatrixmodeldata recipes rmarkdown roxygen2 testthat (>= 3.0.0)usethis withr

Enhances (0)

none

Dependency license breakdown →

Code & Tests

Code Composition

R 15,090 (69%)Rd 3,773 (17%)Markdown 2,011 (9%)Vignettes 1,056 (5%)

Code characteristics

Object systems

S365

Cyclomatic complexity: 1.0 median / 23 max
Test cases: 339 / 0.93 per code line
Documented parameters: 99%

Test coverage

Line coverage

97%

Expression

96.5%

Tests / Examples

97.4% / 76% ex

Functions

355 85 exported

Complexity

2 avg / 23 max

Call network

355 nodes / 473 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

355 functions

Function	Cyclo	Coverage
is_blueprint exp	1	0%
refresh_blueprint exp	1	0%
new_bake_role_requirements	1	0%
new_role_requirements	1	0%
refresh_blueprint.default_formula_blueprint	1	0%
refresh_blueprint.default_recipe_blueprint	1	0%

People & History

People (4)

Maintainer (1)

Hannah Frick

Author, Maintainer

Authors (3)

Hannah Frick

Author, Maintainer

Max Kuhn

Author

Davis Vaughan

Author

Copyright holders (1)

Posit Software, PBC

Copyright holder, Funder

Funders (1)

Posit Software, PBC

Copyright holder, Funder

Release timeline

17 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.4.3Latest
2026-04-04 · current release · diff ↗
1.4.2
2025-08-20 · diff ↗
R
R 4.5.0 released · 2025-04-11
1.4.1
2025-01-31 · diff ↗
1.4.0
2024-06-02 · diff ↗
R
R 4.4.0 released · 2024-04-24
1.3.1
2024-02-02 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.3.0
2023-03-30 · diff ↗
1.2.0
2022-06-30 · diff ↗
1.1.0
2022-06-10 · diff ↗
1.0.0
2022-06-01 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.2.0
2022-01-24 · diff ↗
0.1.6
2021-07-14 · diff ↗

Show 9 earlier events

R
R 4.1.0 released · 2021-05-18
0.1.5
2020-11-09 · diff ↗
0.1.4
2020-07-02 · diff ↗
0.1.3
2020-05-20 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.1.2
2020-02-28 · diff ↗
0.1.1
2020-01-09 · diff ↗
0.1.0
2019-12-16
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-12-16
Total releases: 17 / 7 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1
Bundled data: 0.5 KB / 1 file
Download size: 605 KB
Installed size: not tracked yet
With dependencies: not tracked yet