Home assistant initial startup fails

[johnseekins]

Home Assistant release with the issue:

(venv) hass@hassbian:~ $ hass --version
0.101.3

Last working Home Assistant release (if known):
None

Operating environment (Hass.io/Docker/Windows/etc.):
Python 3.7.3/Debian 10/venv

Description of problem:
On initial startup, I get messages like the following:

2019-11-15 00:52:12 INFO (MainThread) [homeassistant.setup] Setting up lovelace
2019-11-15 00:52:12 ERROR (MainThread) [homeassistant.setup] Error during setup of component lovelace
Traceback (most recent call last):
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/setup.py", line 172, in _async_setup_component
    hass, processed_config
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/lovelace/__init__.py", line 66, in async_setup
    hass.components.frontend.async_register_built_in_panel(
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 421, in __getattr__
    component: Optional[ModuleType] = integration.get_component()
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 223, in get_component
    cache[self.domain] = importlib.import_module(self.pkg_path)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/frontend/__init__.py", line 10, in <module>
    import hass_frontend
ModuleNotFoundError: No module named 'hass_frontend'
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setting up sun
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setup of domain sun took 0.1 seconds.
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setting up script
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setup of domain script took 0.0 seconds.
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setting up history
2019-11-15 00:52:13 ERROR (MainThread) [homeassistant.setup] Error during setup of component history
Traceback (most recent call last):
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/setup.py", line 172, in _async_setup_component
    hass, processed_config
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/history/__init__.py", line 283, in async_setup
    hass.components.frontend.async_register_built_in_panel(
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 421, in __getattr__
    component: Optional[ModuleType] = integration.get_component()
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 223, in get_component
    cache[self.domain] = importlib.import_module(self.pkg_path)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/frontend/__init__.py", line 10, in <module>
    import hass_frontend
ModuleNotFoundError: No module named 'hass_frontend'
2019-11-15 00:52:13 INFO (MainThread) [homeassistant.setup] Setting up config
2019-11-15 00:52:13 ERROR (MainThread) [homeassistant.setup] Error during setup of component config
Traceback (most recent call last):
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/setup.py", line 172, in _async_setup_component
    hass, processed_config
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/config/__init__.py", line 34, in async_setup
    hass.components.frontend.async_register_built_in_panel(
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 421, in __getattr__
    component: Optional[ModuleType] = integration.get_component()
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/loader.py", line 223, in get_component
    cache[self.domain] = importlib.import_module(self.pkg_path)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/opt/hassio/venv/lib/python3.7/site-packages/homeassistant/components/frontend/__init__.py", line 10, in <module>
    import hass_frontend
ModuleNotFoundError: No module named 'hass_frontend'

Additional information:
This is with a completely clean install of Debian and an initial setup of a venv (python3 -m venv)

It seems that the hass_frontend component simply isn't installed with python3 -m pip install homeassistant or during the initial setup.

[johnseekins]

I tried simply commenting out the import hass_frontend line, but this function:

def _frontend_root(dev_repo_path):
    """Return root path to the frontend files."""
    if dev_repo_path is not None:
        return pathlib.Path(dev_repo_path) / "hass_frontend"

    return hass_frontend.where()

is used frequently in the code and fails instead.

[johnseekins]

Whelp! I didn't search hard enough. #28361 points at https://github.com/home-assistant/home-assistant/pull/28203/files which solves it for me.

As noted in the other issues, though...why is this still broken? It seems like a fairly easy pull request to resolve.