For all script packages SPKG that have an embedded source tree -- currently sagelib, sage_docbuild, sage_sws2rst -- we add a new target:

• SPKG-tox-% (which calls tox -e % in the package's source tree)

These targets are particularly useful for invoking them within the portability tests of the top-level tox:

• $ TARGETS_PRE=config.status tox -e docker-ubuntu-focal-standard -- sage_docbuild-tox invokes the tox testing of the sage_docbuild distribution
• $ EXTRA_CONFIGURE_ARGS="--disable-notebook" tox -e docker-ubuntu-focal-standard -- build sagelib-tox-python-sagewheels-nopypi builds (in a Docker container) the Sage distribution (without Jupyter notebook) and then invokes the tox testing of sagelib (added in sagelib: Generate pyproject.toml and setup.cfg [install_requires], requirements.txt, Pipfile, and src/Pipfile #30913) in a venv populated using the wheels
• $ tox -e local-homebrew-macos-maximal -- build-local cysignals networkx sagelib-tox-python-sagewheels-sitepackages-norequirements-nopypi (added in sagelib: Generate pyproject.toml and setup.cfg [install_requires], requirements.txt, Pipfile, and src/Pipfile #30913) builds the non-Python parts of the Sage distribution on top of Homebrew, using a virtual environment that uses homebrew's Python packages
• $ tox -e local-conda-forge-macos-src-environment -- sage_conf sagelib-tox-python-sagewheels-sitepackages-norequirements-nobuildisolation-nopypi (needs sagelib: Generate pyproject.toml and setup.cfg [install_requires], requirements.txt, Pipfile, and src/Pipfile #30913, cython_aliases: Do not fail if one of the listed libraries is not known to pkgconfig #31384) uses the src/environment.yml file to set up a complete environment from conda and then tests sagelib in a venv using tox

Depends on #32899

CC: @jhpalmieri @dimpase @kliem @orlitzky @tobiasdiez

Component: porting

Author: Matthias Koeppe

Branch/Commit: ad12d25

Reviewer: Michael Orlitzky

Issue created by migration from https://trac.sagemath.org/ticket/31535