Command line flag to control logging output file

[TD22057]

Description:

Add a hass command line flag to control where the log file is written to. If not set, the current system (CONFIG/home-assistant.log) is used. This allows users to control where the log file is written to. Many/most Linux app logs are written to /var/log. On the Pi, it's useful to have logs written to a ram disk to avoid wearing the SD card. Original feature request thread is here.

Pull request in home-assistant (if applicable): home-assistant/home-assistant.io#3365

Checklist:

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• New dependencies are only imported inside functions that use them ([example][ex-import]).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[homeassistant]

Hi @TD22057,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[balloob]

Looks good 👍 🐬