Function extend_python_path

src/shiv/bootstrap/__init__.py:159–168

Create or extend a PYTHONPATH variable with the frozen environment we are bootstrapping with.

(environ, additional_paths)

def extend_python_path(environ, additional_paths):
    """Create or extend a PYTHONPATH variable with the frozen environment we are bootstrapping with."""

    # we don't want to clobber any existing PYTHONPATH value, so check for it.
    python_path = environ["PYTHONPATH"].split(os.pathsep) if "PYTHONPATH" in environ else []
    python_path.extend(additional_paths)

    # put it back into the environment so that PYTHONPATH contains the shiv-manipulated paths
    # and any pre-existing PYTHONPATH values with no duplicates.
    environ["PYTHONPATH"] = os.pathsep.join(sorted(set(python_path), key=python_path.index))


def ensure_no_modify(site_packages, hashes):