Avoid leaking %{_pyproject_builddir} to pytest collection

Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1935212

Requires a %pytest change: https://src.fedoraproject.org/rpms/python-rpm-macros/pull-request/102

macros.pyproject

@@ -14,7 +14,13 @@
 %pyproject_ghost_distinfo %{_builddir}/pyproject-ghost-distinfo
 %pyproject_record %{_builddir}/pyproject-record
 
+# Avoid leaking %%{_pyproject_builddir} to pytest collection
+# https://bugzilla.redhat.com/show_bug.cgi?id=1935212
+# The value is read and used by the %%pytest and %%tox macros:
+%_set_pytest_addopts %global __pytest_addopts --ignore=%{_pyproject_builddir}
+
 %pyproject_wheel() %{expand:\\\
+%_set_pytest_addopts
 mkdir -p "%{_pyproject_builddir}"
 CFLAGS="${CFLAGS:-${RPM_OPT_FLAGS}}" LDFLAGS="${LDFLAGS:-${RPM_LD_FLAGS}}" TMPDIR="%{_pyproject_builddir}" \\\
 %{__python3} -m pip wheel --wheel-dir %{_pyproject_wheeldir} --no-deps --use-pep517 --no-build-isolation --disable-pip-version-check --no-clean --progress-bar off --verbose .
@@ -109,6 +115,7 @@ TOX_TESTENV_PASSENV="${TOX_TESTENV_PASSENV:-*}" \\
 PYTHONDONTWRITEBYTECODE=1 \\
 PATH="%{buildroot}%{_bindir}:$PATH" \\
 PYTHONPATH="${PYTHONPATH:-%{buildroot}%{python3_sitearch}:%{buildroot}%{python3_sitelib}}" \\
+%{?__pytest_addopts:PYTEST_ADDOPTS="${PYTEST_ADDOPTS:-} %{__pytest_addopts}"} \\
 HOSTNAME="rpmbuild" \\
 %{__python3} -m tox --current-env -q --recreate -e "%{-e:%{-e*}}%{!-e:%{toxenv}}" %{?*}
 }

pyproject-rpm-macros.spec

@@ -6,7 +6,7 @@ License:        MIT
 
 # Keep the version at zero and increment only release
 Version:        0
-Release:        40%{?dist}
+Release:        41%{?dist}
 
 # Macro files
 Source001:      macros.pyproject
@@ -104,6 +104,10 @@ export HOSTNAME="rpmbuild"  # to speedup tox in network-less mock, see rhbz#1856
 %license LICENSE
 
 %changelog
+* Mon Jun 28 2021 Miro Hrončok <mhroncok@redhat.com> - 0-41
+- Don't leak %%{_pyproject_builddir} to pytest collection
+- Fixes rhzb#1935212
+
 * Thu May 27 2021 Miro Hrončok <mhroncok@redhat.com> - 0-40
 - Don't leak $TMPDIR outside of pyproject macros
 - Set %%_pyproject_wheeldir and %%_pyproject_builddir relative to the source tree, not $PWD

tests/python-setuptools.spec

@@ -0,0 +1,79 @@
+Name:           python-setuptools
+Version:        57.0.0
+Release:        0%{?dist}
+Summary:        Easily build and distribute Python packages
+# see the real Fedora package for explanation:
+License:        MIT and (BSD or ASL 2.0)
+URL:            https://pypi.python.org/pypi/setuptools
+Source0:        %{pypi_source setuptools %{version}}
+
+BuildArch:      noarch
+
+BuildRequires:  python3-devel
+BuildRequires:  pyproject-rpm-macros
+BuildRequires:  gcc
+
+%description
+This package tests 2 things:
+
+ - %%{_pyproject_builddir} does not leak to pytest collection (rhzb#1935212)
+ - TODO %%{pyproject_files} has escaped spaces (rhzb#1976363)
+
+
+%package -n     python3-setuptools
+Summary:        %{summary}
+
+# For users who might see ModuleNotFoundError: No module named 'pkg_resoureces'
+%py_provides    python3-pkg_resources
+%py_provides    python3-pkg-resources
+
+%description -n python3-setuptools
+...
+
+
+%prep
+%autosetup -p1 -n setuptools-%{version}
+
+# The following test deps are optional and either not desired or not available in Fedora:
+sed -Ei setup.cfg -e  '/\bpytest-(checkdocs|black|cov|mypy|enabler)\b/d' \
+                  -e  '/\bflake8\b/d' \
+                  -e  '/\bpaver\b/d'
+# Strip pytest options from the above
+sed -i pytest.ini -e 's/ --flake8//' \
+                  -e 's/ --cov//'
+
+
+%generate_buildrequires
+%pyproject_buildrequires -r -x testing
+
+
+%build
+%pyproject_wheel
+
+
+%install
+%pyproject_install
+%pyproject_save_files setuptools pkg_resources _distutils_hack
+
+# https://github.com/pypa/setuptools/issues/2709
+rm -rf %{buildroot}%{python3_sitelib}/pkg_resources/tests/
+sed -i '/tests/d' %{pyproject_files}
+
+# Paths with spaces are not properly protected by %%pyproject_save_files
+# https://bugzilla.redhat.com/show_bug.cgi?id=1976363
+# This workaround will most likely break once fixed
+sed -Ei 's|/(.+) (.+)|"/\1 \2"|' %{pyproject_files}
+
+
+%check
+# https://github.com/pypa/setuptools/discussions/2607
+rm pyproject.toml
+
+# We only run a subset of tests to speed things up and be less fragile
+PYTHONPATH=$(pwd) %pytest --ignore=pavement.py -k "sdist"
+
+
+%files -n python3-setuptools -f %{pyproject_files}
+%license LICENSE
+%doc docs/* CHANGES.rst README.rst
+%{python3_sitelib}/distutils-precedence.pth

tests/tests.yml

@@ -70,6 +70,9 @@
     - poetry_core:
         dir: .
         run: ./mocktest.sh python-poetry-core
+    - setuptools:
+        dir: .
+        run: ./mocktest.sh python-setuptools
     required_packages:
     - mock
     - rpmdevtools