Kafo

should this be the default? or can we detect the terminal and bg colors correctly?

We can detect it using `tput colors` (even if it's not really OS agnostic).

But in general I'd say that installer in most cases will be used in color enabled terminals and displayed to people so color should be on by default. If we added users a way to disable them I thing that would be ok as well.

Often programs check for a tty to determine if it's interactive or non-interactive, so would provide a useful default.

Again, if it is possible to get it into 1.3 I'd love to invest some time and cherry-pick that. I'd love to keep my beaker tests consistent for all foreman-installer based releases.

As Dominic said, the best way is the UNIX way. If the terminal is interactive, go for colors, otherwise go for non-colored mode. But please keep this option because I think beaker emulates terminal (while it is writing the output to log database).

And I think it is okay to use /usr/bin/tput, if the binary is not there, just fallback to non-colored mode. We do not want to draw another dependency just to make a syscall. Please check katello-configure I think I have been already implementing some hack to rind out number of columns using tput with a fallback there:

https://github.com/Katello/katello-configure/blob/master/lib/util/functions.rb#L45