home-assistant-snap/snap/plugins/python_wot_plugin.py

#!/usr/bin/env python3

import snapcraft
import snapcraft.plugins.v2 as plugins
from typing import Any, Dict, List, Set

"""
See snapcraft.plugins.v2.python.PythonPlugin

Plugin forces removal of 'typing' package
after setup, as 'typing' is causing problems
for python >= 3.7, see:

- https://github.com/pypa/pip/issues/8272
"""
class PluginImpl(plugins.python.PythonPlugin):
    def get_build_commands(self) -> List[str]:
        cmds = super().get_build_commands()
        # cmds.insert(1, 'pip install --trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org --upgrade pip')
        for idx, cmd in enumerate(cmds):
            # Find position where to inject pip uninstall
            if cmd.strip().startswith('[ -f setup.py ]'):
                xcmds = cmd.split("&&", 1)
                # Inject and force removal
                cmds[idx] = f"{xcmds[0]} && pip uninstall -y typing && {xcmds[1]}"
        return cmds