[feature request] Add --config argument for finding .editorconfig

[Taffer]

I've written a Sublime Text plugin to use GDScript-formatter as a linter (I'll submit a PR for the README as soon as it's ready). When run this way, 0.24.0 can't find your project's .editorconfig.

This feature request is to add a --config argument so you can specify the location of a .editorconfig file as a convenience so you don't have to duplicate its settings in Sublime Text's config.

Alternatively, gdscript-formatter lint could be made to work in stdin mode; I couldn't tell if this was intentional or not:

# Guessed from the docs/--help output:

$ cat dice.gd | gdscript-formatter lint
Error: No GDScript files found in the arguments provided. Please provide at least one .gd file or directory containing .gd files.

# Another CLI convention:

$ cat dice.gd | gdscript-formatter lint -
Error: No GDScript files found in the arguments provided. Please provide at least one .gd file or directory containing .gd files.

Maybe a --stdin argument to force this? I couldn't tell from the code, I can't Rust yet.

[Taffer]

Coffee kicked in, and I'm now thinking that it's entirely possible that none of these settings:

[*.gd]
indent_size = 4
indent_style = space
insert_final_newline = true
max_line_length = 132
trim_trailing_whitespace = true

are going to affect lint mode output, except max_line_length. If that's the case, I should convert this into a bug report about gdscript-formatter lint not accepting input from stdin. 👍

[NathanLovato]

At the moment, I think, yes, that only the max line length is read for the linter. In general, the linter did not get a lot of work. I'm personally focusing on the formatter itself and the linter is a community contribution that I've worked on a little bit, mainly addressing bugs, but that's otherwise not gotten a lot of attention. Feedback on it are welcome as this is a type of tool I do not use myself (I find a linter focused on correctness and offering nearly real-time, pretty good static analysis really useful but this is not what it is currently).