Use %py3_test_envvars in %tox when available

The new %py3_test_envvars macro was added
to remove duplication of environment variables used in %check.

We reuse it in %tox to gain support e.g. for PYTEST_XDIST_AUTO_NUM_WORKERS.

However, we keep support for platforms where the macro is not yet available,
not to be forced to backport %py3_test_envvars everywhere right away.

Technically, this should change little, but it sets CFLAGS and LDFLAGS now,
hence a new Y version.

Related: rhbz#2168193

README.md

@@ -175,8 +175,9 @@ Then, use the `%tox` macro in `%check`:
 
 The macro:
 
- - Always prepends `$PATH` with `%{buildroot}%{_bindir}`
- - If not defined, sets `$PYTHONPATH` to `%{buildroot}%{python3_sitearch}:%{buildroot}%{python3_sitelib}`
+ - Sets environment variables via `%{py3_test_envvars}`, namely:
+     - Always prepends `$PATH` with `%{buildroot}%{_bindir}`
+     - If not defined, sets `$PYTHONPATH` to `%{buildroot}%{python3_sitearch}:%{buildroot}%{python3_sitelib}`
  - If not defined, sets `$TOX_TESTENV_PASSENV` to `*`
  - Runs `tox` with `-q` (quiet), `--recreate` and `--current-env` (from [tox-current-env]) flags
  - Implicitly uses the tox environment name stored in `%{toxenv}` - as overridden by `%pyproject_buildrequires -e`

macros.pyproject

@@ -176,10 +176,10 @@ fi
 
 %tox(e:) %{expand:\\\
 TOX_TESTENV_PASSENV="${TOX_TESTENV_PASSENV:-*}" \\
-PYTHONDONTWRITEBYTECODE=1 \\
+%{?py3_test_envvars}%{?!py3_test_envvars:PYTHONDONTWRITEBYTECODE=1 \\
 PATH="%{buildroot}%{_bindir}:$PATH" \\
 PYTHONPATH="${PYTHONPATH:-%{buildroot}%{python3_sitearch}:%{buildroot}%{python3_sitelib}}" \\
-%{?__pytest_addopts:PYTEST_ADDOPTS="${PYTEST_ADDOPTS:-} %{__pytest_addopts}"} \\
+%{?__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

@@ -12,7 +12,7 @@ License:        MIT
 #   Increment Y and reset Z when new macros or features are added
 #   Increment Z when this is a bugfix or a cosmetic change
 # Dropping support for EOL Fedoras is *not* considered a breaking change
-Version:        1.4.0
+Version:        1.5.0
 Release:        1%{?dist}
 
 # Macro files
@@ -129,6 +129,9 @@ export HOSTNAME="rpmbuild"  # to speedup tox in network-less mock, see rhbz#1856
 %license LICENSE
 
 %changelog
+* Mon Nov 28 2022 Miro Hrončok <mhroncok@redhat.com> - 1.5.0-1
+- Use %%py3_test_envvars in %%tox when available
+
 * Mon Sep 19 2022 Python Maint <python-maint@redhat.com> - 1.4.0-1
 - %%pyproject_save_files: Support License-Files installed into the *Root License Directory* from PEP 369
 - %%pyproject_check_import: Import only the modules whose top-level names