* Remove unnecessary exception re-wraps
* Preserve exception chains on re-raise
We slap "from cause" to almost all possible cases here. In some cases it
could conceivably be better to do "from None" if we really want to hide
the cause. However those should be in the minority, and "from cause"
should be an improvement over the corresponding raise without a "from"
in all cases anyway.
The only case where we raise from None here is in plex, where the
exception for an original invalid SSL cert is not the root cause for
failure to validate a newly fetched one.
Follow local convention on exception variable names if there is a
consistent one, otherwise `err` to match with majority of codebase.
* Fix mistaken re-wrap in homematicip_cloud/hap.py
Missed the difference between HmipConnectionError and
HmipcConnectionError.
* Do not hide original error on plex new cert validation error
Original is not the cause for the new one, but showing old in the
traceback is useful nevertheless.
* Run mypy on homeassistant.scripts, disabling bunch of checks for now
* Declare async_initialize in AuthProvider
* Add some type hints
* Remove unreachable code
* Help mypy out
* Script docstring fixes
* Start moving parts of yaml utils to own module
Move parts of yaml loader out of the single large file and start
to create the structure of the yaml loaders in Ansible [0].
[0]: https://github.com/ansible/ansible/tree/devel/lib/ansible/parsing/yaml
* Finish yaml migration, update tests and mocks
* Move code around to finish the migration
* Update the mocks so that `open` is patched in
`homeassistant.util.yaml.loader` instead of
`homeassistant.util.yaml`.
* Updated mypy ignores
* Updated external API of `homeasistant.util.yaml`, see below:
Checked what part of the api of `homeassistant.util.yaml` was actually
called from outside the tests and added an `__ALL__` that contains only
these elements.
Updated the tests so that references to internal parts of the API (e.g.
the yaml module imported into `homeassistant.util.yaml.loader`) are
referenced directly from `homeassistant.util.yaml.loader`.
In `tests/test_yaml.py` the import `yaml` refers to
`homeassistant.util.yaml` and `yaml_loader` refers to `~.loader`.
Future work that remains for the next iteration is to create a custom
SafeConstructor and refers to that instead of monkey patching `yaml` with
custom loaders.
* Update mocks in yaml dumper, check_config
* Don't treat typing as an "in-between" module for import order
That was a < 3.5 era thing.
* Tighten scope of some pylint unused-import disables
To avoid isort moving a top level one around, undesirably broadening its
scope.
* Fix packages deletion in check_config script
* The config key for packages is not present if core config validation
failed. We need to do a safe dict deletion using dict.pop.
* Add check_config test for bad core config
