pre-commit-hooks for Debian
===========================

1. pre-commit
-------------

pre-commit is a hook framework for the Git version control system. It allows
managing and maintaining multi-language Git pre-commit hooks.

When using multiple hooks managed by pre-commit, they are usually maintained
in a Git repository on their own and then included in the pre-commit
configuration file, within the repository they are being run in, like this:

  --- .pre-commit-config.yaml ---
  repos:
  -   repo: https://github.com/pre-commit/pre-commit-hooks
      rev: v5.0.0
      hooks:
      -   id: end-of-file-fixer
      -   id: trailing-whitespace
  [...]
  ---

Running 'pre-commit install' and 'pre-commit run --all-files' then will
automatically download the referenced Git repository (pre-commit-hooks) and
keep it updated.

A demo repository is available upstream:
https://github.com/pre-commit/demo-repo


2. pre-commit-hooks
-------------------

As an alternative to referencing a (remote) Git repository and depend on its
availabilty or the network connectivity to access it, hooks within pre-commit
can also be configured to be used from the local filesystem. This is why the
pre-commit-hooks package is included in Debian.

The above example can be replicated the following way:

  --- .pre-commit-config.yaml ---
  repos:
  -   repo: local
      hooks:
      -   id: end-of-file-fixer
          name: end-of-file-fixer
          language: python
          entry: python3 /usr/lib/python3/dist-packages/pre_commit_hooks/end_of_file_fixer.py
      -   id: trailing-whitespace
          name: trailing-whitespace
          language: python
          entry: python3 /usr/lib/python3/dist-packages/pre_commit_hooks/trailing_whitespace_fixer.py
  [...]
  ---

In future, the Debian package pre-commit-hooks might include some simplification
(like an include file) way to reference these local pre-commit-hooks easier.

 -- Daniel Baumann <daniel@debian.org>  Mon, 21 Apr 2025 12:55:47 +0200