Pre-commit hooks for Elixir.

You'll need to have both mix and pre-commit installed (meaning you'll need to have Python installed also, since pre-commit is a Python package). I'd recommend installing pre-commit with pipx, so that it's globally available across all your projects. See pre-commit's documentation for more detailed installation and usage instructions.

Add the following to your .pre-commit-config.yaml:

repos:
  - repo: https://gitlab.com/jvenom/elixir-pre-commit-hooks
    rev: v1.0.0 # replace with the version you want to use
    hooks: # specify the hooks you want to use here
      - id: mix-format
      - id: mix-test

Install the hooks:

$ pre-commit install

Runs mix format when an .ex or .exs file is included in the commit.

Runs mix test when an .ex file is included in the commit.

If you want to pass additional options to the hook, you can include an args key in the hook's configuration in .pre-commit-config.yaml. The value of the key should be a list of the arguments you want to pass.

hooks:
  - id: mix-test
    args: [--trace, --exclude, my-exclude-filter]

elixir-pre-commit is an Elixir module that provides a pure-Elixir implementation of pre-commit Git hooks. You might want to use that if you only want mix tasks as your pre-commit hooks. If you want to use other, non-mix pre-commit hooks (like these) and mix tasks, you should use this repo.