Support NO_COLOR to turn off the color scheme

[chenrui333]

Would be good to support NO_COLOR env to disable the color output.

https://no-color.org/

[leg100]

Specifying NO_COLOR does already turn off colors in Pug, but I noticed the following:

• the current item is no longer highlighted and there is no way to distinguish it
• same with selected items
• the output from terraform processes is still colored

Is this what you are seeing?

Out of interest, what is the use case?

[chenrui333]

it is used for CI to check the output in my case, but it would be good to support NO_COLOR in general

[leg100]

Can you please confirm whether you are seeing the above?

[leg100]

Pug serves no purpose in a CI context, so I don't see a use case.

I don't think NO_COLOR makes much sense for a TUI. I checked out both tig, and k9s, both well established TUIs, and neither supports NO_COLOR.

[chenrui333]

yeah, it is fine.