def install_requirements(
    reqs: Iterable[Requirement],
    environment: BaseEnvironment,
    clean: bool = False,
    use_install_cache: bool = False,
    allow_uv: bool = True,
) -> None:  # pragma: no cover
    """Resolve and install the given requirements into the environment."""
    reqs = [req for req in reqs if not req.marker or req.marker.matches(environment.spec)]
    reporter = LockReporter()
    project = environment.project
    backend = project.backend
    for req in reqs:
        if req.is_file_or_url:
            req.relocate(backend)  # type: ignore[attr-defined]
    resolver = project.get_resolver(allow_uv=allow_uv)(
        environment=environment,
        requirements=reqs,
        update_strategy="all",
        strategies=project.lockfile.default_strategies,
        target=environment.spec,
        tracked_names=(),
        keep_self=True,
        reporter=reporter,
    )
    resolved = resolver.resolve().packages
    syncer = environment.project.get_synchronizer(quiet=True, allow_uv=allow_uv)(
        environment,
        clean=clean,
        retry_times=0,
        install_self=False,
        use_install_cache=use_install_cache,
        packages=resolved,
        requirements=reqs,
    )
    syncer.synchronize()
Resolve and install the given requirements into the environment.
src/pdm/installers/core.py