Installation

Arity is distributed as a single binary. Use the installer below for the command line, or choose a package manager you already use.

For VS Code or Positron, the Arity extension includes the binary, so you can start with editor setup. For formatting inside RStudio, install the R package.

Install script

The installer selects the release for your platform and installs to a user-local directory.

macOS/Linux

curl --proto '=https' --tlsv1.2 -sSf https://arity.cc/install | sh

Windows

powershell -NoProfile -ExecutionPolicy Bypass -Command "irm https://arity.cc/install.ps1 | iex"

Set ARITY_INSTALL_DIR to change the destination or ARITY_TAG to pin a release.

Package managers

Cargo

Install the Arity CLI from crates.io with Cargo:

cargo install arity

Homebrew

On macOS or Linux:

brew install jolars/tap/arity

npm

The arity-cli package bundles a prebuilt binary:

npm install -g arity-cli

PyPI

Install the binary as a Python tool:

uv tool install arity

Alternatively, use pipx install arity.

Arch Linux

Install the prebuilt arity-bin package with an AUR helper:

paru -S arity-bin

Nix

Arity is available as arity in Nixpkgs. For a shell with Arity available:

nix shell nixpkgs#arity

For a persistent NixOS installation, add pkgs.arity to environment.systemPackages.

mise and Aqua

mise can install Arity through its Aqua backend:

mise use aqua:jolars/arity

Commit the resulting mise.toml to share the selected version. With Aqua directly, run aqua init if the project has no aqua.yaml, then add and install Arity:

aqua g -i jolars/arity
aqua install

Commit aqua.yaml to share the selected version. Both tools use the jolars/arity registry entry.

Prebuilt binaries

Download an archive from the releases page and put the arity binary on your PATH.

Editor extensions

The VS Code and Open VSX extension bundles the binary and starts the language server automatically. The Zed extension can download it or use an installed copy.

From source

Clone the repository and build a release binary:

git clone https://github.com/jolars/arity
cd arity
cargo build --release

The binary is written to target/release/arity.

R package (CRAN)

To use the formatter inside R, install the arity package:

install.packages("arity")

See the R package documentation for details and RStudio setup for use in the editor.

Verify the installation

Check that Arity is available in your terminal:

arity --version

Continue with Getting started to format and lint your first file, or Editor setup to use Arity in your editor.