Disabling terminal output coloring

[tchaumeny]

What would you like to be added:

I couldn't find a way to disable the terminal coloring of output.
Usually, this is achievable by setting the env variable NO_COLOR=1, which has no effect with Syft.

Why is this needed:

This is useful when syft output is processed outside of the terminal.

[kzantow]

Hi @tchaumeny we are currently looking to update a library to use Bubbletea, which will support that option. However, if you're looking to use the tools with logs, a better option might be using -q which means "quiet" as this disables the real-time terminal UI in favor of just outputting the SBOM directly to stdout.

[wagoodman]

While working on the bubbletea port PR I tried out the NO_COLOR env var on the current version of syft and it seemed to work

(I've also confirmed the same behavior when swapping to bubbletea). Can you let me know what distro name and version you're running on and how you're invoking syft?

[tchaumeny]

I'm using syft on macos 13.3.1, here is an example:

[wagoodman]

Curious! what shell and terminal emulator are you using? And what is the value of the TERM env var?

[tchaumeny]

The shell is zsh on macos native Terminal, and TERM=xterm-256color

[tchaumeny]

Oh actually I noticed I have the same behavior as you have on your screenshot, NO_COLOR=1 actually disables colors for the output below. It doesn't for the additional output generated with the -vflag.

[wagoodman]

ah! that's helpful, I think I know where the problem is. Our logger has been configured to always enforce color, we can adjust that.

[willmurphyscode]

I believe this was fixed by intermediate development, since the fix in anchore/clio#14 was pulled into syft in #2001.

With color on:

With NO_COLOR=1 in the environment:

@tchaumeny Thanks for reporting this issue! Please let us know if we've missed something.