Rework CI/RTD dependencies.

As noted in comments, doing these as etxras or as PDM dev dependencies
doens't really work because they're not used like extras, and PDM
would constrain them to Python-3.9-compatible versions, which creates
differences with RTD (which runs a much newer Python and will pick up,
for example, Sphinx 8.x instead of 7.x as a result).

.github/workflows/ci.yml

@@ -119,7 +119,7 @@ jobs:
       - run: tar xf dist/*.tar.gz --strip-components=1
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.13"
+          python-version: "3.12"
       - name: Set up test runner
         run: |
           python -VV

.pre-commit-config.yaml

@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.6.0
+  rev: v5.0.0
   hooks:
     - id: check-added-large-files
     - id: check-ast
@@ -16,10 +16,10 @@ repos:
     - id: end-of-file-fixer
     - id: trailing-whitespace
 - repo: https://github.com/psf/black
-  rev: 24.8.0
+  rev: 24.10.0
   hooks:
     - id: black
-      language_version: python3.8
+      language_version: python3.13
       name: black (Python formatter)
 - repo: https://github.com/pycqa/flake8
   rev: 7.1.1

.readthedocs.yaml

@@ -7,12 +7,13 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.12"
 
 sphinx:
   configuration: docs/conf.py
 
 python:
   install:
     - method: pip
-      path: .[docs]
+      path: .
+    - requirements: docs/requirements.txt

docs/conf.py

@@ -35,7 +35,7 @@
     "sphinx_inline_tabs",
 ]
 templates_path = ["_templates"]
-source_suffix = ".rst"
+source_suffix = {".rst": "restructuredtext"}
 master_doc = "index"
 project = "django-registration"
 copyright = "James Bennett and contributors"

docs/requirements.txt

@@ -0,0 +1,13 @@
+# These dependencies are not "extras" defined in the pyproject.toml,
+# because they're not something you actually want to install alongside
+# the main package. They're also not "dev dependencies" in the PDM
+# sense of the term, because PDM would constrain them to the oldest
+# Python version the main package supports (3.9), while all our
+# documentation jobs, whether run via nox or via readthedocs, run on
+# Python 3.12.
+furo
+sphinx
+sphinx-copybutton
+sphinx-inline-tabs
+sphinx-notfound-page
+sphinxext-opengraph

noxfile.py

@@ -76,7 +76,12 @@ def tests_with_coverage(session: nox.Session, django: str) -> None:
     Run the package's unit tests, with coverage report.
 
     """
-    session.install(f"Django~={django}.0", ".[tests]")
+    session.install(
+        f"Django~={django}.0",
+        ".[tests]",
+        "coverage",
+        'tomli; python_full_version < "3.11.0a7"',
+    )
     python_version = session.run(
         f"{session.bin}/python{session.python}", "--version", silent=True
     ).strip()
@@ -127,13 +132,17 @@ def coverage_report(session: nox.Session) -> None:
 # -----------------------------------------------------------------------------------
 
 
-@nox.session(python=["3.13"], tags=["docs"])
+# The documentation jobs ordinarily would want to use the latest Python version, but
+# currently that's 3.13 and Read The Docs doesn't yet support it. So to ensure the
+# documentation jobs are as closely matched to what would happen on RTD, these jobs stay
+# on 3.12 for now.
+@nox.session(python=["3.12"], tags=["docs"])
 def docs_build(session: nox.Session) -> None:
     """
     Build the package's documentation as HTML.
 
     """
-    session.install(".[docs]")
+    session.install(".", "-r", "docs/requirements.txt")
     build_dir = session.create_tmp()
     session.run(
         f"{session.bin}/python{session.python}",
@@ -152,7 +161,7 @@ def docs_build(session: nox.Session) -> None:
     clean()
 
 
-@nox.session(python=["3.13"], tags=["docs"])
+@nox.session(python=["3.12"], tags=["docs"])
 def docs_docstrings(session: nox.Session) -> None:
     """
     Enforce the presence of docstrings on all modules, classes, functions, and
@@ -175,13 +184,13 @@ def docs_docstrings(session: nox.Session) -> None:
     clean()
 
 
-@nox.session(python=["3.13"], tags=["docs"])
+@nox.session(python=["3.12"], tags=["docs"])
 def docs_spellcheck(session: nox.Session) -> None:
     """
     Spell-check the package's documentation.
 
     """
-    session.install(".[docs]")
+    session.install(".", "-r", "docs/requirements.txt")
     session.install("pyenchant", "sphinxcontrib-spelling")
     build_dir = session.create_tmp()
     session.run(

pyproject.toml

@@ -41,30 +41,6 @@ dependencies = [
 "Documentation" = "https://django-registration.readthedocs.io/"
 "Source Code" = "https://github.com/ubernostrum/django-registration"
 
-
-[project.optional-dependencies]
-docs = [
-    "furo",
-    "sphinx",
-    "sphinx-copybutton",
-    "sphinx-inline-tabs",
-    "sphinx-notfound-page",
-    "sphinxext-opengraph",
-]
-linters = [
-    "bandit[toml]",
-    "flake8",
-    "flake8-bugbear",
-    "pylint",
-    "pylint-django",
-    "interrogate",
-]
-tests = [
-    "coverage",
-    "nox",
-    "tomli; python_full_version < \"3.11.0a7\"",
-]
-
 [tool.bandit]
 exclude_dirs = ["src/django_registration/_backports.py"]
 skips = ["B101"]
@@ -137,3 +113,6 @@ disable = [
   "missing-module-docstring",
   "too-many-ancestors",
 ]
+
+[dependency-groups]
+tests = ["nox"]