Support colored output in Github Actions

[Sebastian Olsson]

Which version of kube-score are you using?

kube-score version: 1.16.1

What did you do?

Within a Github Actions job, run kube-score score on any YAML file that causes kube-score to produce output.

What did you expect to see?

The output from kube-score in the Github Actions job should be colored, like when I run kube-score locally. [CRITICAL] lines should be red, [OK] lines should be yellow, etc.

What did you see instead?

The output is not colored:

[Sebastian Olsson]

This appears to be related to fatih/color#132.

I can think of three solutions:

1. Set color.NoColor = false unconditionally. However, this would mess up output resulting from piping operations.
2. If colorization of the output is considered a component of the output format, introduce a new value for the --output-format parameter. However, depending on one's needs, this might warrant a combinatorial explosion of supported values for this parameter (human-nocolor, ci-nocolor, sarif-nocolor...).
3. If colorization is not considered a component of the output format, introduce a --color parameter with the values auto, always and never, similar to how ls --color works. This seems to me to be the most flexible solution, though it requires introducing a new optional parameter.

[Gustav Westling]

Hej @Sebelino! 👋

Hmmmm, that's annoying, I would have expected faith/color to be smarter here. I think that I like option 3 the best, maybe in some sort of combination with automatic detection if we're running inside GitHub Actions.

[Gustav Westling]

I've pushed a hacky fix with auto coloring support that enables color support by default when running on GitHub Actions. Are you building from source, or should I make a new release so that you can test it?

[Sebastian Olsson]

Hoy, that was quick! I built it from source and it works beautifully now. Didn't even have to supply the --color flag, although it's still a nice-to-have feature.

Thanks!

[Gustav Westling]

No problem! :-)