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README.Rmd
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---
output: github_document
---
<!-- README.md is generated from README.Rmd. Please edit that file -->
```{r, include = FALSE}
knitr::opts_chunk$set(
fig.path = "man/figures/",
eval = FALSE
)
```
# Useful git pre-commit hooks for R
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[](https://CRAN.R-project.org/package=precommit) [](https://lifecycle.r-lib.org/articles/stages.html#stable) [](https://github.com/lorenzwalthert/precommit/actions)
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[Pre-commit hooks](https://pre-commit.com) are tests that run each time you attempt to commit. If the tests pass, the commit will be made, otherwise not. A very basic test is to check if the code is parsable, making sure you have not forgotten a comma, brace or quote. You can run hooks locally and/or in the cloud:
- As a check before local commits: This requires installing pre-commit.
- As a CI check with <https://pre-commit.ci>: If you want to enforce passing hooks on pull requests (and auto-fix trivial problems like styling) even if the committer does not have a local installation.
## Goals of the package
The goal of this package is to twofold:
- Provide a [set of hooks](https://lorenzwalthert.github.io/precommit/articles/available-hooks.html) that are useful when your git repo contains R code.
- Provide [usethis](https://github.com/r-lib/usethis)-like functionality for common tasks such as installation and set-up and config file modification.
## Why do I need pre-commit hooks?
<figure>
<img src="man/figures/pre-commit-meme.jpeg" width="500" align="center" href="https://twitter.com/dataandme/status/1255510799273132032"/>
<figcaption>By <a href=https://twitter.com/dataandme/status/1255510799273132032>Mara Averick</a></figcaption>
</figure>
For a more in-depth explanation and even more reasons, see `vignette("why-use-hooks")`.
## Documentation
The following online docs are available:
- [latest CRAN release](https://lorenzwalthert.github.io/precommit/).
- [GitHub development version](https://lorenzwalthert.github.io/precommit/dev/).
- [UseR 2022 talk on pre-commit for R](https://www.youtube.com/watch?v=r3QXwfxQBLM&t=1280s)
These only cover the functionality added on top of the pre-commit framework by this package. Everything else is covered in the extensive [online documentation](https://pre-commit.com) of the pre-commit framework itself, including how to create hooks for actions like `git push` or `git checkout`, create local hooks etc.