Re: [PATCH 2/4] git-prompt.sh: refactor colored prompt code

From: Eduardo D'Avila <erdavila@gmail.com>
Date: Jun 22, 2013, 16:45 UTC
Message-ID: <CAOz-D1+LoAnoRLgnyRYtq5LQR32RyXp4RR2M5pPTaxaGcXM4yg@mail.gmail.com>
In-Reply-To: <354a860e12a3463ce5d031c0dc46d095841f717d.1371780085.git.erdavila@gmail.com>

2013/6/22 Øystein Walle <oystwa@gmail.com>:

Show 13 quoted lines

> I've gotten the impression it's better to use tput to generate the escape
> sequences instead of hardcoding them. So something like:
>
> local c_red='\['"$(tput setaf 1)"'\]'
> local c_green='\['"$(tput setaf 2)"'\]'
> local c_green='\['"$(tput setaf 4)"'\]'
> local c_clear='\['"$(tput sgr0)"'\]'
>
> which is technically cleaner, if not visually.
>
> The problem with that approach is that tput will be run several times for
> each prompt, so it would be best if the color variables were global. Another
> thing is that you rely on tput being available.

Are there any guidelines regarding global shell script variables?

I'm considering doing this:
   __git_c_red="\[$(tput setaf 1 || echo -e '\e[31m')\]"
which handles the case where tput is not available.

Eduardo