Centralized pre-commit configuration

Easily install and update centralized pre-commit hooks and their configuration files in decentralized repositories.

To be able to validate and automatically fix commits we're using git hooks.

We're also heavily relying on pre-commit, which is a framework for managing and maintaining multi-language pre-commit hooks. Please refer to the pre-commit documentation here.

Philosophy

In order to be able to install all the tools and linters in a single command with up to date centralized configurations, we're copying the configurations files of your tools (.pre-commit-config.yaml, isort.cfg, .flake8, .clang-format, ...) from an URL to your local git directory and we then install pre-commit.

Why not use only pre-commit by @asotile? Well, in his words:

pre-commit will not directly support mutability in configuration (this includes referencing a centralized repository). This causes lots of issues with repeatability and maintenance in general. This was an early design decision after seeing the pain caused at scale when a linter changes behaviour and suddenly every repository's master branch is broken.

So if you disagree and want decentralized repository with centralized lint configuration, you need a tool on top of pre-commit to shoot yourself in the foot anyway. Or more realistically to update your configuration files from a central repository from time to time.

More seriously, the alternative is to use all-repos to mass update a bunch of decentralized repositories with a decentralized configuration.

Installation

pip3 install centralized-pre-commit-conf

Usage

See pre-commit-conf --help for options.

Installing hooks

For example with this config.yaml in one of the appropriate search paths:

configuration_files:
  - ".pylintrc"
  - ".pre-commit-config.yaml"
repository: https://mycompany.net/lint-conf/
branch: master
update_gitignore: True
path: "pre-commit/static/"
gitignore_info_text:
  "# Configuration file added automatically by 'centralized-pre-commit-conf'"

pre-commit-conf would recover the defined configuration files from https://mycompany.net/lint-conf/master/pre-commit/static/ and update the .gitignore:

You can set the option system wide in /home/pierre/.config/pre-commit-conf/config.yaml.
✨ Successfully retrieved .pre-commit-config.yaml ✨
✨ Successfully retrieved .pylintrc               ✨
✨ Updated .gitignore successfully with {'.pre-commit-config.yaml', '.pylintrc'}. ✨
 🎉 2 configuration files recovered and pre-commit installed correctly. 🎉

Here would the content of the .gitignore:

# Configuration file added automatically by 'centralized-pre-commit-conf'
.pre-commit-config.yaml
.pylintrc

Then with the same configuration, using pre-commit-conf --branch hardcore-pylint-conf would try to recover the configuration files from https://mycompany.net/lint-conf/hardcore-pylint-conf/pre-commit/static/ instead.

You can set the option system wide in /home/pierre/.config/pre-commit-conf/config.yaml.
Found existing .pre-commit-config.yaml ⁉️  Use '-f' or '--replace-existing' to force erase.
Found existing .pylintrc               ⁉️  Use '-f' or '--replace-existing' to force erase.
All configuration files already existed.

Next commit supposing the .pre-commit-config.yaml is done correctly your modified files we be linted with the centralized configuration.

Development / contribution

pip3 install -e ".[test]"
pre-commit-conf
python3 -m pytest --cov centralized_pre_commit_conf

Pull requests are welcome :)