Add docs for fetching token using container

[KapJI]

I messed up with #772

Credits to @Brephlas

[leikoilja]

Thanks @KapJI for fixing it & @Brephlas for contribution!

[owenvoke]

I had a couple of questions about this Docker image. Is the Dockerfile available anywhere? 👀

And also, if this is solely for this purpose, would it make more sense for the CMD to run the get_tokens.py script, rather than bash so you don't have to connect to the image and leave it running in the background in a detached state?

That way it would just be a case of running this, rather than 3 commands.

docker run --rm -it breph/ha-google-home_get-token:latest

[Brephlas]

It is now :) https://github.com/Brephlas/dockerfile_breph-ha-google-home_get-token/tree/master

Regarding the second question: I like the idea and played a little bit with this. Unfortunately, it seems it is not possible to run interactive scripts using this method. At least when asking for user input, the script fails.
So I think we have two options:

1. stick to the current flow
2. change it, but require to pass username and password using -e docker environment variables. But I am not sure if I like that one because the credentials are then inside of the history

[owenvoke]

Hi @Brephlas, I've just tested it locally (changing CMD bash to CMD python3 get_tokens.py) and it seems to work perfectly with docker run --rm -it [image]. 🤔 I'm using macOS, and iTerm2.

Preview video

Also related to this image, I wonder if we could change to using Alpine to reduce the image size. 🤷🏻

FROM alpine:3.18

WORKDIR /app

RUN apk add py3-pip
COPY ./get_tokens.py .
COPY ./requirements.txt .
RUN python3 -m pip install -r ./requirements.txt

CMD python3 get_tokens.py

This reduces the image from 606MB to 96.7MB 🙂

I guess device_id, master_token, and access_token would probably all make sense as having configurable by Docker secrets.

Happy to move this discussion to your repo though, if that makes more sense.

[Brephlas]

Thanks @owenvoke. Apparently, the issue was sitting in front of the screen, I missed the -it parameter 😅
It now worked in my local tests and I've already updated the image to alpine and pushed it to dockerhub.
Will update the docs of this repo in a sec

Regarding the docker secrets we can move the discussion to my repo. However, until now I have no experience with docker secrets