Re: Construct ANSI colour codes

[Mike Jonkmans]

On Wed, Apr 07, 2021 at 11:30:10PM +0200, pauline-galea@gmx.com wrote:
> > From: "Greg Wooledge" <greg@wooledge.org>
> 
> Thank you for the example.  I had coded the color things some years ago
> and did not want to break things too much, so I can see if everything
> works.  Otherwise I could end up with too much work to do on my other
> scripts.  Originally, I had scalar variables that you mentioned.
> 
> The thing I'd like to ask again is how to make dim, normal, bright, blink
> options with this scheme.
> 
> 
> > declare -A color=(
> >   [black]="$(tput setaf 0)"
> >   [red]="$(tput setaf 1)"
> >   [green]="$(tput setaf 2)"
> >   [yellow]="$(tput setaf 3)"
> >   [blue]="$(tput setaf 4)"
> >   [magenta]="$(tput setaf 5)"
> >   [cyan]="$(tput setaf 6)"
> >   [white]="$(tput setaf 7)"
> > )
> > sgr0="$(tput sgr0)"
> >
> > echo "${color[green]}hello${sgr0} ${color[red]}world${sgr0}"
> > printf 'Price: %s$%.2f%s\n' "${color[blue]}" "$price" "$sgr0"
> >
> > Or you can use scalar variables like "red" "blue" and so on, instead of
> > the associative array.
> >
> > I gave two different examples for output.  You can use either, or both,
> > or come up with your own.
> >
> > If you insist on initializing the color variables inside a function,
> > and if you go with the array, then you might want to add the -g option
> > to make it global.

The information on capablities, to be used with tput, can be found via:
        man terminfo

To echo dim red text, you can use:
        tput dim; tput setaf 1; echo text; tput sgr0

Or, slightly more efficient:
        tput -S <<-EOF; echo text; tput sgr0
                dim
                setaf 1
        EOF

Regards, Mike Jonkmans