Run black locally with nox

.github/pull_request_template.md

@@ -1,25 +1,15 @@
 **Pull request**
 
-Please remove this paragraph and replace it with a description of your PR.
-Also include links to the issues that it fixes. 
+Please *remove* this paragraph and replace it with a description of your PR. Also include the issue that it fixes. 
 
 **How Has This Been Tested?**
 
-Please repalce this paragraph with a description of how this PR has been 
-tested. Include the necessary instructions and files such that other can
-reproduce it.
+Please *remove* this paragraph with a description of how this PR has been tested.
 
 **Checklist**
 
-- [ ] I have formatted my code with [black](https://github.com/psf/black).
-- [ ] I have added tests that prove my fix is effective or that my feature 
-  works
-- [ ] I have added docstrings to newly created methods and classes
-- [ ] I have optimized the code at least one time after creating the initial 
-  version
-- [ ] I have updated the [README.md](../README.md) or verified that this
-  is not necessary
-- [ ] I have updated the [readthedocs](../docs/source) documentation or
-  verified that this is not necessary
-- [ ] I have added a concise human-readable description of the change to
-  [CHANGELOG.md](../CHANGELOG.md)
+- [ ] I have read [CONTRIBUTING.md](../CONTRIBUTING.md). 
+- [ ] I have added a concise human-readable description of the change to [CHANGELOG.md](../CHANGELOG.md).
+- [ ] I have tested that this fix is effective or that this feature works.
+- [ ] I have added docstrings to newly created methods and classes.
+- [ ] I have updated the [README.md](../README.md) and the [readthedocs](../docs/source) documentation. Or verified that this is not necessary.

.github/workflows/actions.yml

@@ -16,13 +16,22 @@ env:
 jobs:
 
   check-code-formatting:
-    name: Check code formatting
+    name: Check coding style
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
-      - name: Check code formatting
-        uses: psf/black@stable
+      - name: Set up Python ${{ env.default-python }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ env.default-python }}
+      - name: Upgrade pip, Install nox
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install nox
+      - name: Check coding style
+        run: |
+          nox --error-on-missing-interpreters --non-interactive --session format
 
   check-coding-style:
     name: Check coding style

CONTRIBUTING.md

@@ -26,20 +26,25 @@ Any contribution is appreciated! You might want to:
 
 ## Guideline for creating pull request
 
-* A pull request should close an existing issue.
-* Pull requests should be merged to master. Version tags are used indicate the releases.
+* A pull request should close an existing issue. For example, use "Fix #123" to indicate that your PR fixes issue 123. 
+* Pull requests should be merged to master.
 * Include unit tests when possible. In case of bugs, this will help to prevent the same mistake in the future. In case
   of features, this will show that your code works correctly.
 * Code should work for Python 3.6+.
-* Code should be formatted with [black](https://github.com/psf/black). 
+* Test your code by using nox (see below). 
 * New features should be well documented using docstrings.
+* Check if the [README.md](../README.md) or [readthedocs](../docs/source) documentation needs to be updated. 
 * Check spelling and grammar.
-* Don't forget to update the [CHANGELOG.md](CHANGELOG.md#[Unreleased])
+* Don't forget to update the [CHANGELOG.md](CHANGELOG.md#[Unreleased]). 
 
 ## Guidelines for posting comments
 
 * [Be cordial and positive](https://www.kennethreitz.org/essays/be-cordial-or-be-on-your-way)
 
+## Guidelines for publishing
+
+* Publishing is automated. Add a YYYYMMDD version tag and GitHub workflows will do the rest. 
+
 ## Getting started
 
 1. Clone the repository
@@ -68,9 +73,3 @@ Any contribution is appreciated! You might want to:
    ```sh
     nox -e py36
     ```
-
-4. After changing the code, run the black formatter.
-
-    ```sh
-    black .
-    ```

noxfile.py

@@ -1,20 +1,37 @@
+import os
+
 import nox
 
 
 PYTHON_ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+PYTHON_MODULES = ["pdfminer", "tools", "tests", "noxfile.py", "setup.py"]
+
+
+@nox.session
+def format(session):
+    session.install("black")
+    # Format files locally with black, but only check in cicd
+    if "CI" in os.environ:
+        session.run("black", "--check", *PYTHON_MODULES)
+    else:
+        session.run("black", *PYTHON_MODULES)
 
 
 @nox.session
 def lint(session):
     session.install("flake8")
-    session.run("flake8", "pdfminer/", "tools/", "tests/", "--count", "--statistics")
+    session.run("flake8", *PYTHON_MODULES, "--count", "--statistics")
 
 
 @nox.session
 def types(session):
     session.install("mypy")
     session.run(
-        "mypy", "--install-types", "--non-interactive", "--show-error-codes", "."
+        "mypy",
+        "--install-types",
+        "--non-interactive",
+        "--show-error-codes",
+        *PYTHON_MODULES,
     )
 
 

setup.py

@@ -5,8 +5,7 @@
 from os import path
 
 sys.path.append(str(Path(__file__).parent))
-import pdfminer as package
-
+import pdfminer as package  # noqa: E402
 
 with open(path.join(path.abspath(path.dirname(__file__)), "README.md")) as f:
     readme = f.read()