[PR #13388/203c1c59 backport][3.15] 🧪 Run tests from sdist like downstreams

CHANGES/13363.contrib.rst

@@ -0,0 +1,13 @@
+CI now builds the ``sdist`` (and a pure-Python wheel) once, in a new
+``build-pure-python-dists`` job, and shares that build across ``test``,
+``autobahn``, ``benchmark``, ``build-wheels``, ``test-mobile`` and the
+``sdist``-based half of linting, instead of every one of those jobs
+checking out the repository and running ``make cythonize`` on its own
+-- by :user:`webknjaz`.
+
+Linting is also now split into ``lint-from-git`` (the
+:file:`requirements/runtime-deps.in` sync check and docs spell-checking,
+which need real Git history) and ``lint-from-sdist`` (``mypy``,
+``slotscheck``, the changelog fragment check, and ``twine check``, which
+build from the shared artifact instead), since an ``sdist`` tarball never
+contains :file:`.git`.

CHANGES/13388.contrib.rst

@@ -0,0 +1 @@
+13363.contrib.rst

CHANGES/13388.packaging.rst

@@ -0,0 +1 @@
+7632.packaging.rst

CHANGES/7632.packaging.rst

@@ -0,0 +1,6 @@
+Started publishing an additional pure-Python wheel alongside the existing
+per-platform binary wheels and the ``sdist`` -- by :user:`webknjaz`.
+
+This gives users on platforms without a working C compiler, or without a
+matching pre-built wheel, an installable fallback that does not require
+compilation.

MANIFEST.in

@@ -3,6 +3,9 @@ include CHANGES.rst
 include README.rst
 include CONTRIBUTORS.txt
 include Makefile
+include .mypy.ini
+include .coveragerc.toml
+include .coveragerc-cython.toml
 graft aiohttp
 graft docs
 graft examples

pyproject.toml

@@ -172,6 +172,12 @@ test-command = ""
 # don't build PyPy wheels, install from source instead
 skip = "pp*"
 
+[tool.cibuildwheel.environment]
+PIP_BUILD_CONSTRAINT = "requirements/cython.txt"
+PIP_CONSTRAINT = "requirements/cython.txt"
+UV_BUILD_CONSTRAINT = "requirements/cython.txt"
+UV_CONSTRAINT = "requirements/cython.txt"
+
 [tool.cibuildwheel.ios]
 # iOS currently does not support build[uv]
 build-frontend = "build"

tests/test_circular_imports.py

@@ -71,8 +71,13 @@ def _discover_path_importables(
         if pkg_dir_path.parts[-1] == "__pycache__":
             continue
 
-        if all(Path(_).suffix != ".py" for _ in file_names):
-            continue
+        if all(Path(_).suffix != ".py" for _ in file_names):  # pragma: no branch
+            # NOTE: This is only possible when testing editable installs where
+            # NOTE: the directory lookup encounters the `aiohttp/.hash/` cache
+            # NOTE: directory with files like `_http_parser.pyx.hash` in it that
+            # NOTE: never get included into source distributions or wheels and so
+            # NOTE: the module discovery mechanism never hits this code branch.
+            continue  # pragma: no cover
 
         rel_pt = pkg_dir_path.relative_to(pkg_pth)
         pkg_pref = ".".join((pkg_name,) + rel_pt.parts)