Use pre-commit

.github/workflows/main.yml

@@ -2,38 +2,62 @@ name: CI
 
 on:
   push:
-    branches: '*'
+    branches: "*"
   pull_request:
-    branches: '*'
+    branches: "*"
 
 jobs:
+  # Run "pre-commit run --all-files"
+  pre-commit:
+    runs-on: ubuntu-20.04
+    timeout-minutes: 2
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      # ref: https://github.com/pre-commit/action
+      - uses: pre-commit/[email protected]
+      - name: Help message if pre-commit fail
+        if: ${{ failure() }}
+        run: |
+          echo "You can install pre-commit hooks to automatically run formatting"
+          echo "on each commit with:"
+          echo "    pre-commit install"
+          echo "or you can run by hand on staged files with"
+          echo "    pre-commit run"
+          echo "or after-the-fact on already committed files with"
+          echo "    pre-commit run --all-files"
+
   build-n-test-n-coverage:
     name: Build, test and code coverage
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest,  windows-latest]
-        python-version: [ 3.6, 3.7, 3.8, 3.9 ]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     env:
-        OS: ${{ matrix.os }}
-        PYTHON: '3.9'
+      OS: ${{ matrix.os }}
+      PYTHON: "3.9"
 
     steps:
-    - name: Checkout
-      uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        pip install --upgrade setuptools pip
-        pip install --upgrade --upgrade-strategy eager -e .[test] pytest-cov codecov 'coverage<5'
-        pip freeze
-    - name: Check types
-      run: mypy jupyter_client/manager.py jupyter_client/multikernelmanager.py jupyter_client/client.py jupyter_client/blocking/client.py jupyter_client/asynchronous/client.py jupyter_client/channels.py jupyter_client/session.py jupyter_client/adapter.py jupyter_client/connect.py jupyter_client/consoleapp.py jupyter_client/jsonutil.py jupyter_client/kernelapp.py jupyter_client/launcher.py
-    - name: Run the tests
-      run: py.test --cov jupyter_client -v jupyter_client
-    - name: Code coverage
-      run: codecov
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          pip install --upgrade setuptools pip
+          pip install --upgrade --upgrade-strategy eager -e .[test] pytest-cov codecov 'coverage<5'
+          pip freeze
+      - name: Check types
+        run: mypy jupyter_client/manager.py jupyter_client/multikernelmanager.py jupyter_client/client.py jupyter_client/blocking/client.py jupyter_client/asynchronous/client.py jupyter_client/channels.py jupyter_client/session.py jupyter_client/adapter.py jupyter_client/connect.py jupyter_client/consoleapp.py jupyter_client/jsonutil.py jupyter_client/kernelapp.py jupyter_client/launcher.py
+      - name: Run the tests
+        run: py.test --cov jupyter_client -v jupyter_client
+      - name: Code coverage
+        run: codecov

.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+repos:
+  - repo: https://github.com/asottile/reorder_python_imports
+    rev: v1.9.0
+    hooks:
+      - id: reorder-python-imports
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+        args: ["--line-length", "100"]
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v2.2.1
+    hooks:
+      - id: prettier
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: "3.8.4"
+    hooks:
+      - id: flake8
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: end-of-file-fixer
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: requirements-txt-fixer

COPYING.md

@@ -25,7 +25,7 @@ software without specific prior written permission.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
@@ -47,8 +47,8 @@ Jupyter uses a shared copyright model. Each contributor maintains copyright
 over their contributions to Jupyter. But, it is important to note that these
 contributions are typically only changes to the repositories. Thus, the Jupyter
 source code, in its entirety is not the copyright of any single person or
-institution.  Instead, it is the collective copyright of the entire Jupyter
-Development Team.  If individual contributors want to maintain a record of what
+institution. Instead, it is the collective copyright of the entire Jupyter
+Development Team. If individual contributors want to maintain a record of what
 changes/contributions they have specific copyright on, they should indicate
 their copyright in the commit message of the change, when they commit the
 change to one of the Jupyter repositories.

README.md

@@ -2,16 +2,15 @@
 
 [![Build Status](https://github.com/jupyter/jupyter_client/workflows/CI/badge.svg)](https://github.com/jupyter/jupyter_client/actions)
 [![Code Health](https://landscape.io/github/jupyter/jupyter_client/master/landscape.svg?style=flat)](https://landscape.io/github/jupyter/jupyter_client/master)
-
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 `jupyter_client` contains the reference implementation of the [Jupyter protocol][].
 It also provides client and kernel management APIs for working with kernels.
 
 It also provides the `jupyter kernelspec` entrypoint
 for installing kernelspecs for use with Jupyter frontends.
 
-[Jupyter protocol]: https://jupyter-client.readthedocs.io/en/latest/messaging.html
-
+[jupyter protocol]: https://jupyter-client.readthedocs.io/en/latest/messaging.html
 
 # Development Setup
 
@@ -43,5 +42,4 @@ The following commands build the documentation in HTML format and check for brok
 
 Point your browser to the following URL to access the generated documentation:
 
-_file:///my/projects/jupyter\_client/docs/\_build/html/index.html_
-
+_file:///my/projects/jupyter_client/docs/\_build/html/index.html_

RELEASING.md

@@ -25,7 +25,6 @@ twine upload dist/*
 
 - Load `jupyter_client/_version.py` and bump the patch version and add the 'dev' tag back to the end of the version tuple.
 
-
 ## Push to GitHub
 
 ```bash

docs/api/manager.rst

@@ -55,4 +55,3 @@ Utility functions
 -----------------
 
 .. autofunction:: run_kernel
-