tox: Add 'lint' target

This simply runs the same commands as the GitHub CI workflows.

Signed-off-by: Stephen Finucane <[email protected]>

Author: stephenfin

.github/workflows/lint.yml

@@ -13,6 +13,8 @@ env:
   FORCE_COLOR: "1"
 
 jobs:
+  # If you update any of these commands, don't forget to update the equivalent
+  # tox environment
   ruff:
     runs-on: ubuntu-latest
 
@@ -101,7 +103,7 @@ jobs:
       run: >
         sphinx-lint
         --enable line-too-long
-        --max-line-length 85 
+        --max-line-length 85
         CHANGES
         CONTRIBUTING.rst
         README.rst

tox.ini

@@ -25,6 +25,19 @@ setenv =
 commands=
     python -X dev -X warn_default_encoding -m pytest --durations 25 {posargs}
 
+[testenv:lint]
+description =
+    Run linters.
+extras =
+    lint
+# If you update any of these commands, don't forget to update the equivalent
+# GitHub Workflow step
+commands =
+    ruff . --diff --format github
+    flake8 .
+    isort --check-only --diff .
+    mypy sphinx/
+
 [testenv:docs]
 description =
     Build documentation.