tox-poetry-installer/.pre-commit-config.yaml

---
# All of the pre-commit hooks here actually use the `pytyhon` pre-commit language
# setting. However, for the python language setting, pre-commit will create and manage
# a cached virtual environment for each hook ID and do a bare `pip install <repo>` into
# the venv to setup the hook. This can result in conflicting dependency versions between
# the version installed to the pre-commit venv and the version installed to the Poetry
# venv specified in the lockfile.
#
# The solution is to specify `language: system` for all hooks and then install the
# required dependencies to the Poetry venv. The `system` language skips the isolated
# venv creation and looks for the entrypoint specified by the hook in the global
# environment which, if running in the Poetry venv, will find the entrypoint provided
# by the Poetry-managed dependency.
#
repos:
  - repo: local
    hooks:
      - id: end-of-file-fixer
        name: end-of-file-fixer
        entry: end-of-file-fixer
        language: system
        types:
          - text

      - id: fix-encoding-pragma
        name: fix-encoding-pragma
        entry: fix-encoding-pragma
        language: system
        args:
          - "--remove"
        types:
          - python

      - id: trailing-whitespace-fixer
        name: trailing-whitespace-fixer
        entry: trailing-whitespace-fixer
        language: system
        types:
          - text

      - id: check-merge-conflict
        name: check-merge-conflict
        entry: check-merge-conflict
        language: system
        types:
          - text

      - id: reorder-python-imports
        name: reorder-python-imports
        entry: isort
        language: system
        require_serial: true
        types:
          - python
        args:
          - "--filter-files"

      - id: black
        name: black
        entry: black
        language: system
        types:
          - python

      - id: blacken-docs
        name: blacken-docs
        entry: blacken-docs
        language: system
        types:
          - text

      - id: mdformat
        name: mdformat
        entry: mdformat
        language: system
        args:
          - "--number"
          - "--wrap=90"
        types:
          - markdown