Add pre commit (#103)

* add pre-commit

* run pre-commit

* skip lint on README.md as it breaks template filling

.bumpversion.cfg

@@ -20,4 +20,3 @@ values =
 [bumpversion:file:setup.py]
 search = version="{current_version}",
 replace = version="{new_version}",
-

.circleci/config.yml

@@ -25,6 +25,9 @@ common: &common
         command: |
           python -m pip install --upgrade pip
           python -m pip install tox
+    - run:
+        name: install pre-commit
+        command: python -m pip install --progress-bar=off pre-commit
     - run:
         name: run tox
         command: python -m tox run -r
@@ -102,12 +105,6 @@ jobs:
         environment:
           TOXENV: py311-core
 
-  py37-lint:
-    <<: *common
-    docker:
-      - image: cimg/python:3.7
-        environment:
-          TOXENV: py37-lint
   py38-lint:
     <<: *common
     docker:

.github/pull_request_template.md

@@ -6,12 +6,13 @@ Closes #
 ### How was it fixed?
 
 ### Todo:
-- [ ] Clean up commit history
 
-- [ ] Add or update documentation related to these changes
+- \[ \] Clean up commit history
 
-- [ ] Add entry to the [release notes](https://github.com/ethereum/<REPO_NAME>/blob/main/newsfragments/README.md)
+- \[ \] Add or update documentation related to these changes
+
+- \[ \] Add entry to the [release notes](https://github.com/ethereum/%3CREPO_NAME%3E/blob/main/newsfragments/README.md)
 
 #### Cute Animal Picture
 
-![Put a link to a cute animal picture inside the parenthesis-->]()
+![Put a link to a cute animal picture inside the parenthesis-->](<>)

.pre-commit-config.yaml

@@ -0,0 +1,37 @@
+exclude: '.project-template|docs/conf.py'
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+    -   id: check-yaml
+    -   id: check-toml
+    -   id: end-of-file-fixer
+    -   id: trailing-whitespace
+-   repo: https://github.com/psf/black
+    rev: 23.9.1
+    hooks:
+    -   id: black
+-   repo: https://github.com/PyCQA/flake8
+    rev: 6.1.0
+    hooks:
+    -   id: flake8
+        additional_dependencies:
+        -   flake8-bugbear==23.9.16
+        exclude: setup.py
+-   repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+    -   id: isort
+-   repo: https://github.com/pycqa/pydocstyle
+    rev: 6.3.0
+    hooks:
+    -   id: pydocstyle
+-   repo: https://github.com/executablebooks/mdformat
+    rev: 0.7.17
+    hooks:
+    -   id: mdformat
+-   repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.5.1
+    hooks:
+    -   id: mypy
+        exclude: tests/

Makefile

@@ -5,8 +5,7 @@ CURRENT_SIGN_SETTING := $(shell git config commit.gpgSign)
 help:
 	@echo "clean-build - remove build artifacts"
 	@echo "clean-pyc - remove Python file artifacts"
-	@echo "lint - check style with mypy, flake8, isort, pydocstyle, and black"
-	@echo "lint-roll - automatically fix problems with flake8 and black"
+	@echo "lint - fix linting issues with pre-commit
 	@echo "test - run tests quickly with the default Python"
 	@echo "docs - generate docs and open in browser (linux-docs for version on linux)"
 	@echo "notes - consume towncrier newsfragments/ and update release notes in docs/"
@@ -27,12 +26,7 @@ clean-pyc:
 	find . -name '__pycache__' -exec rm -rf {} +
 
 lint:
-	tox run -e lint
-
-lint-roll:
-	isort <MODULE_NAME> tests
-	black <MODULE_NAME> tests setup.py
-	$(MAKE) lint
+	pre-commit run --all-files --show-diff-on-failure
 
 test:
 	pytest tests

README.md

@@ -24,9 +24,13 @@ for information on how we do:
 
 - Testing
 - Pull Requests
-- Code Style
 - Documentation
 
+We use [pre-commit](https://pre-commit.com/) to maintain consistent code style. Once
+installed, it will run automatically with every commit. You can also run it manually
+with `make lint`. If you need to make a commit that skips the `pre-commit` checks, you
+can do so with `git commit --no-verify`.
+
 ### Development Environment Setup
 
 You can set up your dev environment with:
@@ -37,6 +41,7 @@ cd <REPO_NAME>
 virtualenv -p python3 venv
 . venv/bin/activate
 python -m pip install -e ".[dev]"
+pre-commit install
 ```
 
 ### Release setup

docs/index.rst

@@ -11,7 +11,7 @@ Contents
 
     <MODULE_NAME>
     release_notes
- 
+
 
 Indices and tables
 ------------------

newsfragments/README.md

@@ -8,15 +8,15 @@ relevant to people working on the code itself.)
 Each file should be named like `<ISSUE>.<TYPE>.rst`, where
 `<ISSUE>` is an issue number, and `<TYPE>` is one of:
 
-* `breaking`
-* `bugfix`
-* `deprecation`
-* `docs`
-* `feature`
-* `internal`
-* `misc`
-* `performance`
-* `removal`
+- `breaking`
+- `bugfix`
+- `deprecation`
+- `docs`
+- `feature`
+- `internal`
+- `misc`
+- `performance`
+- `removal`
 
 So for example: `123.feature.rst`, `456.bugfix.rst`
 

newsfragments/validate_files.py

@@ -31,7 +31,6 @@ if num_args == 1:
     assert sys.argv[1] in ("is-empty",)
 
 for fragment_file in THIS_DIR.iterdir():
-
     if fragment_file.name in ALLOWED_FILES:
         continue
     elif num_args == 0:

setup.py

@@ -1,44 +1,34 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 from setuptools import (
-    setup,
     find_packages,
+    setup,
 )
 
 extras_require = {
-    "test": [
-        "pytest>=7.0.0",
-        "pytest-xdist>=2.4.0",
-    ],
-    "lint": [
-        "flake8==6.0.0",  # flake8 claims semver but adds new warnings at minor releases, leave it pinned.
-        "flake8-bugbear==23.3.23",  # flake8-bugbear does not follow semver, leave it pinned.
-        "isort>=5.10.1",
-        "mypy==0.971",  # mypy does not follow semver, leave it pinned.
-        "pydocstyle>=6.0.0",
-        "black>=23",
+    "dev": [
+        "build>=0.9.0",
+        "bumpversion>=0.5.3",
+        "ipython",
+        "pre-commit>=3.4.0",
+        "pytest-watch>=4.1.0",
+        "tox>=4.0.0",
+        "twine",
+        "wheel",
     ],
     "docs": [
         "sphinx>=6.0.0",
         "sphinx_rtd_theme>=1.0.0",
         "towncrier>=21,<22",
     ],
-    "dev": [
-        "bumpversion>=0.5.3",
-        "pytest-watch>=4.1.0",
-        "tox>=4.0.0",
-        "build>=0.9.0",
-        "wheel",
-        "twine",
-        "ipython",
+    "test": [
+        "pytest>=7.0.0",
+        "pytest-xdist>=2.4.0",
     ],
 }
 
 extras_require["dev"] = (
-    extras_require["dev"]
-    + extras_require["test"]
-    + extras_require["lint"]
-    + extras_require["docs"]
+    extras_require["dev"] + extras_require["docs"] + extras_require["test"]
 )
 
 

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist=
     py{37,38,39,310,311}-core
-    py{37,38,39,310,311}-lint
+    py{38,39,310,311}-lint
     py{37,38,39,310,311}-wheel
     py311-wheel-windows
     docs
@@ -36,26 +36,19 @@ basepython=
 extras=
     test
     docs
-allowlist_externals=make
+allowlist_externals=make,pre-commit
 
 [common-lint]
 basepython=python
-extras=lint
-allowlist_externals=black
+deps=pre-commit
 commands=
-    mypy -p <MODULE_NAME> --config-file {toxinidir}/mypy.ini
-    flake8 {toxinidir}/<MODULE_NAME> {toxinidir}/tests
-    isort --check-only --diff {toxinidir}/<MODULE_NAME> {toxinidir}/tests
-    pydocstyle --explain {toxinidir}/<MODULE_NAME> {toxinidir}/tests
-    black --check {toxinidir}/<MODULE_NAME> {toxinidir}/docs {toxinidir}/tests {toxinidir}/setup.py
+    pre-commit run --all-files --show-diff-on-failure
 
 [testenv:lint]
 basepython: python
-extras: {[common-lint]extras}
 commands: {[common-lint]commands}
 
-[testenv:py{37,38,39,310,311}-lint]
-extras: {[common-lint]extras}
+[testenv:py{38,39,310,311}-lint]
 commands: {[common-lint]commands}
 
 [testenv:py{37,38,39,310,311}-wheel]