Run from the retrobios package, a hint and --help named python3 install.py, a file that user does not have. The package's launcher sets RETROBIOS_BOOTSTRAP=pypi, and the command is read from the environment it runs in: uvx retrobios from uv's cache, pipx run retrobios from pipx's, retrobios once installed.
build_pypi.py stages install.py, the launcher, __main__.py, README and
LICENSE, then runs uv build with flit_core 3.12.0 pinned and
SOURCE_DATE_EPOCH set from install.py's commit. Adds python -m retrobios,
the PyPA classifiers, keywords and project URLs. CI installs uv.
scripts/build_pypi.py writes a wheel and an sdist from install.py, the
copy install.sh pins, and packaging/pypi. The version is the date of the
release in release.json. validate.yml now runs on packaging/ changes.
Abdessamad Derraz