Flake8

.darglint

@@ -0,0 +1,2 @@
+[darglint]
+strictness = short

.flake8

@@ -1,5 +1,5 @@
 [flake8]
-select = ANN,B,B9,BLK,C,D,DAR,E,F,S,W
+select = ANN,B,B9,BLK,C,E,F,S,W
 ignore = E203,E501,W503,C901,S308
 max-line-length = 80
 max-complexity = 10

.pre-commit-config.yaml

@@ -15,16 +15,16 @@ repos:
     rev: 19.10b0
     hooks:
       - id: black
-  # - repo: https://gitlab.com/pycqa/flake8
-  #   rev: 3.7.9
-  #   hooks:
-  #     - id: flake8
-  #       additional_dependencies:
-  #         - flake8-bandit==2.1.2
-  #         - flake8-bugbear==20.1.4
-  #         - flake8-docstrings==1.5.0
-  #         - pep8-naming==0.10.0
-  #         - darglint==1.2.3
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.1
+    hooks:
+      - id: flake8
+        additional_dependencies:
+          - flake8-bandit==2.1.2
+          - flake8-bugbear==20.1.4
+          - flake8-docstrings==1.5.0
+          - pep8-naming==0.10.0
+          - darglint==1.3.0
   - repo: https://github.com/asottile/reorder_python_imports
     rev: v2.3.0
     hooks:

noxfile.py

@@ -1,6 +1,5 @@
 """Nox sessions."""
 import contextlib
-import shutil
 import tempfile
 from pathlib import Path
 from typing import cast
@@ -140,8 +139,18 @@ def tests(session: Session) -> None:
     """Run the test suite."""
     install_package(session)
     install(session, "coverage[toml]", "pytest")
-    session.run("coverage", "run", "-m", "pytest", *session.posargs)
-    session.run("coverage", "report")
+    session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)
+    session.notify("coverage")
+
+
+@nox.session
+def coverage(session: Session) -> None:
+    """Produce the coverage report."""
+    args = session.posargs or ["report"]
+    install(session, "coverage[toml]")
+    if not session.posargs and any(Path().glob(".coverage.*")):
+        session.run("coverage", "combine")
+    session.run("coverage", *args)
 
 
 @nox.session(python=python_versions)