Function derive_setup_local

pythonbuild/cpython.py:249–707

Derive the content of the Modules/Setup.local file.

(
    cpython_source_archive,
    python_version,
    target_triple,
    build_options,
    extension_modules,
)

def derive_setup_local(
    cpython_source_archive,
    python_version,
    target_triple,
    build_options,
    extension_modules,
):
    """Derive the content of the Modules/Setup.local file."""

    # The first part of this function validates that our extension modules YAML
    # based metadata is in sync with the various files declaring extension
    # modules in the Python distribution.

    disabled = set()
    ignored = set()
    setup_enabled_wanted = set()
    config_c_only_wanted = set()

    # Collect metadata about our extension modules as they relate to this
    # Python target.
    for name, info in sorted(extension_modules.items()):
        python_min_match = meets_python_minimum_version(
            python_version, info.get("minimum-python-version", "1.0")
        )
        python_max_match = meets_python_maximum_version(
            python_version, info.get("maximum-python-version", "100.0")
        )

        if info.get("build-mode") not in (
            None,
            "shared",
            "static",
            "shared-or-disabled",
        ):
            raise Exception("unsupported build-mode for extension module %s" % name)

        if not (python_min_match and python_max_match):
            log(f"ignoring extension module {name} because Python version incompatible")
            ignored.add(name)
            continue

        if targets := info.get("disabled-targets"):
            if any(re.match(p, target_triple) for p in targets):
                log(
                    "disabling extension module %s because disabled for this target triple"
                    % name
                )
                disabled.add(name)

        # Extension is demanding it be built as shared. If this isn't possible due to
        # a static build, disable the extension.
        if info.get("build-mode") == "shared-or-disabled" and "static" in build_options:
            disabled.add(name)

        if info.get("setup-enabled", False):
            setup_enabled_wanted.add(name)

        for entry in info.get("setup-enabled-conditional", []):