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.pre-commit-config.yaml
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# ============================================================
# .pre-commit-config.yaml (Lean Hygiene)
# ============================================================
# VARIANT: lean-hygiene
# SOURCE: https://github.com/denisecase/templates
#
# REQ: Lean repos MAY include a .pre-commit-config.yaml for repo hygiene (optional).
# WHY: Keep diffs clean across OSes and validate repo metadata files (TOML/YAML/JSON).
#
# OBS: These hooks use and do NOT override:
# - .editorconfig (whitespace / indentation)
# - .gitattributes (EOL normalization)
# - tool configs (if present), e.g., lakefile.lean, pyproject.toml
#
# OPTIONAL LOCAL USAGE (no repo venv required):
# Install uv (once, user-level).
# uv self update
# uvx pre-commit install
# uvx pre-commit run --all-files (just once, to check all files)
# Subsequent commits will AUTOMATICALLY run pre-commit hooks after git add
# and before git commit.
#
# NOTE: pre-commit is optional.
# Repositories do NOT require Python, uv, or pre-commit to clone or commit.
exclude: |
(?x)^(
\.DS_Store|
\.coverage|
\.ipynb_checkpoints/|
\.mypy_cache/|
\.nox/|
\.pytest_cache/|
\.ruff_cache/|
\.tox/|
\.venv/|
.*\.(egg-info)/|
.*\.log|
__pycache__/|
_minted.*/|
build/|
coverage\.xml|
dist/|
htmlcov/|
lake-packages/|
node_modules/|
out/|
site/
)
repos:
# === REPO: PRE-COMMIT HOOKS (cross-platform, zero config) ===
#
# These hooks prevent problems that show up later as:
# - mysterious diffs
# - broken builds on another OS
- repo: https://github.com/pre-commit/pre-commit-hooks
rev: v6.0.0
hooks:
# === PRE-COMMIT: NORMALIZE FILE FORMATTING ===
- id: trailing-whitespace
name: A1) Clean trailing whitespace (per .editorconfig)
args: [--markdown-linebreak-ext=md] # Preserves markdown double-space line breaks
- id: end-of-file-fixer
name: A2) End files with a newline (per .gitattributes)
- id: mixed-line-ending
name: A3) Normalize line endings to LF before linters
args: [--fix=lf] # OBS: Windows working copies may be CRLF.
# === PRE-COMMIT: CHECK DATA FILE FORMATS ===
- id: check-json
name: B1) Validate JSON syntax
- id: check-toml
name: B2) Validate TOML syntax
- id: check-yaml
name: B3) Validate YAML syntax
files: \.(yml|yaml)$
exclude: ^mkdocs\.ya?ml$ # OBS: mkdocs.yaml may include non-standard tags.
# === PRE-COMMIT:CHECK FOR COMMON PROBLEMS ===
- id: check-added-large-files
name: C1) Prevent accidental commits of large binaries
args: [--maxkb=500]
- id: check-merge-conflict
name: C2) Prevent committing merge conflicts
- id: check-case-conflict
name: C3) Check for filename case conflicts
# === GLOBAL SETTINGS ===
# ALT: Set fail_fast to true to stop at first failure.
fail_fast: false # Run all hooks even if one fails