wagtail/setup.py

import subprocess

from setuptools import setup
from setuptools.command.sdist import sdist as base_sdist


class sdist(base_sdist):
    def compile_assets(self):
        try:
            subprocess.check_call(["npm", "run", "build"])
        except (OSError, subprocess.CalledProcessError) as e:
            print("Error compiling assets: " + str(e))  # noqa: T201
            raise SystemExit(1)

    def run(self):
        self.compile_assets()
        base_sdist.run(self)


setup(
    name="wagtail",
    cmdclass={"sdist": sdist},
)