editorconfig integration

[Asalle]

What language does this apply to? protobuf.el

Describe the problem you are trying to solve. protobuf-mode ignores the settings in .editorconfig of my project. The project contains only .proto files and a couple of bash scripts. I set indent_style = tab in .editorconfig and it works well for other files, but .proto files are still indented with 2 spaces.

Describe the solution you'd like After setting indent_style = tab in .editorconfig I would expect .proto files to be also indented with tabs.

Describe alternatives you've considered I tried to follow instructions mentioned here. Didn't succeed, it would be much nicer if the desired behaviour would be picked up from .editorconfig or at least there would be a var for indent style.

Additional context Add any other context or screenshots about the feature request here.

[rafi-kamal]

@TeBoring @acozzette

I'm not sure if anyone from our team knows much about that config, but if you can figure out the problem then please free to send a pull request to us :)

[elharo]

Google style is to always use spaces, never tabs. I'm not sure we should allow this.

https://developers.google.com/protocol-buffers/docs/style

[elharo]

The EBNF grammar seems unclear on this point. That is, I don't know whether tabs are allowed in .proto files or not.

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